From 0c15394a85134e1797d30592cd08789c4c1a8e1d Mon Sep 17 00:00:00 2001
From: Blake Rouse <blake.rouse@elastic.co>
Date: Wed, 10 Jun 2020 10:52:11 -0400
Subject: [PATCH] Switch the GRPC communication where Agent is running the
 server and the beats are connecting back to Agent (#18973)

* Update libbeat fleet management to use elastic-agent-client.

* Work on switching to the new GRPC.

* More on refactor

* Add back the state.

* Format and check

* Add changelog.

* Cleanup.

* mage fmt in x-pack/libbeat.

* Update go.mod.

* Fix from review.

* Fix NewFromConfig comment

* Update go.mod

* Fix imports.

* Fix some locking issues from review.

* Fix lots of issues, add unit testing to cover restarts on failure reporting or crashes.

* Update go.sum

* Fix TestConfigurableRun.

* Fix range over registered apps in GRPC server using RWLock, switch to sync.Map.

* Fix config.

* Fix tests to work on Windows.

* Fix operation start to not start the same application twice.

* Fix enabling and disabling of monitoring.
---
 .gitignore                                    |   5 +
 libbeat/cmd/instance/beat.go                  |   2 +-
 libbeat/management/management.go              |   4 +-
 x-pack/elastic-agent/CHANGELOG.asciidoc       |   1 +
 .../_meta/config/common.p2.yml.tmpl           |  13 +-
 .../_meta/config/common.reference.p2.yml.tmpl |  13 +-
 .../config/elastic-agent.docker.yml.tmpl      |  13 +-
 x-pack/elastic-agent/elastic-agent.docker.yml |  13 +-
 .../elastic-agent/elastic-agent.reference.yml |  13 +-
 x-pack/elastic-agent/elastic-agent.yml        |  13 +-
 x-pack/elastic-agent/magefile.go              |   7 +-
 .../pkg/agent/application/local_mode.go       |  13 +-
 .../pkg/agent/application/managed_mode.go     |  14 +-
 .../pkg/agent/application/stream.go           |   8 +-
 .../pkg/agent/operation/common_test.go        |  69 ++-
 .../pkg/agent/operation/monitoring_test.go    |  10 +-
 .../pkg/agent/operation/operation.go          |   4 +-
 .../pkg/agent/operation/operation_config.go   |   9 +-
 .../pkg/agent/operation/operation_fetch.go    |   9 +-
 .../pkg/agent/operation/operation_install.go  |   9 +-
 .../pkg/agent/operation/operation_remove.go   |   9 +-
 .../pkg/agent/operation/operation_start.go    |  20 +-
 .../pkg/agent/operation/operation_stop.go     |  16 +-
 .../pkg/agent/operation/operation_verify.go   |   9 +-
 .../pkg/agent/operation/operator.go           |  31 +-
 .../pkg/agent/operation/operator_test.go      | 436 ++++++++++--------
 .../configurable-1.0-darwin-x86/main.go       |  63 ---
 .../README.md                                 |   0
 .../configurable-1.0-darwin-x86_64/main.go    |  98 ++++
 .../scripts/long-1.0-darwin-x86/README.md     |   1 -
 .../scripts/short-1.0-darwin-x86/README.md    |   1 -
 .../elastic-agent/pkg/core/plugin/app/app.go  |  94 ++--
 .../pkg/core/plugin/app/client.go             |  10 -
 .../pkg/core/plugin/app/configure.go          |  66 +--
 .../pkg/core/plugin/app/start.go              | 295 +++---------
 .../pkg/core/plugin/app/status.go             |  82 ++++
 .../pkg/core/plugin/process/cmd_cred.go       |   5 +
 .../pkg/core/plugin/process/config.go         |  15 +-
 .../pkg/core/plugin/process/process.go        | 165 +------
 .../pkg/core/plugin/server/server.go          |  93 ----
 .../pkg/core/plugin/state/state.go            |  40 +-
 .../pkg/core/remoteconfig/config.go           |  31 --
 .../core/remoteconfig/grpc/configclient.go    |  93 ----
 .../remoteconfig/grpc/connection_provider.go  |  55 ---
 .../pkg/core/remoteconfig/grpc/factory.go     |  79 ----
 .../core/remoteconfig/grpc/noop_backoff.go    |  26 --
 .../remoteconfig/grpc/remote_config.pb.go     | 310 -------------
 .../elastic-agent/pkg/core/server/config.go   |  41 ++
 .../pkg/core/server/config_test.go            |  27 ++
 .../elastic-agent/pkg/core/server/server.go   | 103 +++--
 .../elastic-agent/proto/remote_config.proto   |  22 -
 .../libbeat/management/fleet/config_server.go |  61 ---
 x-pack/libbeat/management/fleet/manager.go    | 142 +++---
 x-pack/libbeat/management/manager.go          |   2 +-
 x-pack/libbeat/management/manager_test.go     |   8 +-
 55 files changed, 1072 insertions(+), 1719 deletions(-)
 delete mode 100644 x-pack/elastic-agent/pkg/agent/operation/tests/scripts/configurable-1.0-darwin-x86/main.go
 rename x-pack/elastic-agent/pkg/agent/operation/tests/scripts/{configurable-1.0-darwin-x86 => configurable-1.0-darwin-x86_64}/README.md (100%)
 create mode 100644 x-pack/elastic-agent/pkg/agent/operation/tests/scripts/configurable-1.0-darwin-x86_64/main.go
 delete mode 100644 x-pack/elastic-agent/pkg/agent/operation/tests/scripts/long-1.0-darwin-x86/README.md
 delete mode 100644 x-pack/elastic-agent/pkg/agent/operation/tests/scripts/short-1.0-darwin-x86/README.md
 delete mode 100644 x-pack/elastic-agent/pkg/core/plugin/app/client.go
 create mode 100644 x-pack/elastic-agent/pkg/core/plugin/app/status.go
 delete mode 100644 x-pack/elastic-agent/pkg/core/plugin/server/server.go
 delete mode 100644 x-pack/elastic-agent/pkg/core/remoteconfig/config.go
 delete mode 100644 x-pack/elastic-agent/pkg/core/remoteconfig/grpc/configclient.go
 delete mode 100644 x-pack/elastic-agent/pkg/core/remoteconfig/grpc/connection_provider.go
 delete mode 100644 x-pack/elastic-agent/pkg/core/remoteconfig/grpc/factory.go
 delete mode 100644 x-pack/elastic-agent/pkg/core/remoteconfig/grpc/noop_backoff.go
 delete mode 100644 x-pack/elastic-agent/pkg/core/remoteconfig/grpc/remote_config.pb.go
 create mode 100644 x-pack/elastic-agent/pkg/core/server/config.go
 create mode 100644 x-pack/elastic-agent/pkg/core/server/config_test.go
 delete mode 100644 x-pack/elastic-agent/proto/remote_config.proto
 delete mode 100644 x-pack/libbeat/management/fleet/config_server.go

diff --git a/.gitignore b/.gitignore
index fe3a1459213..78e09df9348 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,6 +11,8 @@
 *beat/logs
 *beat/data
 x-pack/functionbeat/pkg
+x-pack/elastic-agent/data
+x-pack/elastic-agent/pkg/agent/operation/tests/downloads
 
 # Files
 .DS_Store
@@ -25,6 +27,9 @@ mage_output_file.go
 x-pack/functionbeat/*/fields.yml
 x-pack/functionbeat/provider/*/functionbeat-*
 x-pack/dockerlogbeat/temproot.tar
+x-pack/elastic-agent/elastic_agent
+x-pack/elastic-agent/fleet.yml
+x-pack/elastic-agent/pkg/agent/operation/tests/scripts/configurable-1.0-darwin-x86_64/configurable
 
 # Editor swap files
 *.swp
diff --git a/libbeat/cmd/instance/beat.go b/libbeat/cmd/instance/beat.go
index eb58d36a454..d962207463a 100644
--- a/libbeat/cmd/instance/beat.go
+++ b/libbeat/cmd/instance/beat.go
@@ -462,7 +462,7 @@ func (b *Beat) launch(settings Settings, bt beat.Creator) error {
 	logp.Info("%s start running.", b.Info.Beat)
 
 	// Launch config manager
-	b.ConfigManager.Start()
+	b.ConfigManager.Start(beater.Stop)
 	defer b.ConfigManager.Stop()
 
 	return beater.Run(&b.Beat)
diff --git a/libbeat/management/management.go b/libbeat/management/management.go
index dc793fafe2d..690c3dba7f7 100644
--- a/libbeat/management/management.go
+++ b/libbeat/management/management.go
@@ -40,7 +40,7 @@ type ConfigManager interface {
 	Enabled() bool
 
 	// Start the config manager
-	Start()
+	Start(func())
 
 	// Stop the config manager
 	Stop()
@@ -98,6 +98,6 @@ func nilFactory(*common.Config, *reload.Registry, uuid.UUID) (ConfigManager, err
 }
 
 func (nilManager) Enabled() bool                           { return false }
-func (nilManager) Start()                                  {}
+func (nilManager) Start(_ func())                          {}
 func (nilManager) Stop()                                   {}
 func (nilManager) CheckRawConfig(cfg *common.Config) error { return nil }
diff --git a/x-pack/elastic-agent/CHANGELOG.asciidoc b/x-pack/elastic-agent/CHANGELOG.asciidoc
index 851cf366f06..ae76bb8a878 100644
--- a/x-pack/elastic-agent/CHANGELOG.asciidoc
+++ b/x-pack/elastic-agent/CHANGELOG.asciidoc
@@ -70,3 +70,4 @@
 - Change monitoring defaults for agent {pull}18927[18927]
 - Agent verifies packages before using them {pull}18876[18876]
 - Change stream.* to dataset.* fields {pull}18967[18967]
+- Agent now runs the GRPC server and spawned application connect by to Agent {pull}18973[18973]
diff --git a/x-pack/elastic-agent/_meta/config/common.p2.yml.tmpl b/x-pack/elastic-agent/_meta/config/common.p2.yml.tmpl
index 58a82bbd3c2..10a78b5e052 100644
--- a/x-pack/elastic-agent/_meta/config/common.p2.yml.tmpl
+++ b/x-pack/elastic-agent/_meta/config/common.p2.yml.tmpl
@@ -97,13 +97,18 @@ datasources:
 #   install_path: "${path.data}/install"
 
 # process:
-#   # minimal port number for spawned processes
-#   min_port: 10000
-#   # maximum port number for spawned processes
-#   max_port: 30000
 #   # timeout for creating new processes. when process is not successfully created by this timeout
 #   # start operation is considered a failure
 #   spawn_timeout: 30s
+#   # timeout for stopping processes. when process is not stopped by this timeout then the process.
+#   # is force killed
+#   stop_timeout: 30s
+
+# grpc:
+#   # listen address for the GRPC server that spawned processes connect back to.
+#   address: localhost
+#   # port for the GRPC server that spawned processes connect back to.
+#   port: 6789
 
 # retry:
 #   # Enabled determines whether retry is possible. Default is false.
diff --git a/x-pack/elastic-agent/_meta/config/common.reference.p2.yml.tmpl b/x-pack/elastic-agent/_meta/config/common.reference.p2.yml.tmpl
index 15582908fe7..5086a5fa253 100644
--- a/x-pack/elastic-agent/_meta/config/common.reference.p2.yml.tmpl
+++ b/x-pack/elastic-agent/_meta/config/common.reference.p2.yml.tmpl
@@ -89,13 +89,18 @@ datasources:
 #   install_path: "${path.data}/install"
 
 # process:
-#   # minimal port number for spawned processes
-#   min_port: 10000
-#   # maximum port number for spawned processes
-#   max_port: 30000
 #   # timeout for creating new processes. when process is not successfully created by this timeout
 #   # start operation is considered a failure
 #   spawn_timeout: 30s
+#   # timeout for stopping processes. when process is not stopped by this timeout then the process.
+#   # is force killed
+#   stop_timeout: 30s
+
+# grpc:
+#   # listen address for the GRPC server that spawned processes connect back to.
+#   address: localhost
+#   # port for the GRPC server that spawned processes connect back to.
+#   port: 6789
 
 # retry:
 #   # Enabled determines whether retry is possible. Default is false.
diff --git a/x-pack/elastic-agent/_meta/config/elastic-agent.docker.yml.tmpl b/x-pack/elastic-agent/_meta/config/elastic-agent.docker.yml.tmpl
index fc7edf73413..a4effcf24f8 100644
--- a/x-pack/elastic-agent/_meta/config/elastic-agent.docker.yml.tmpl
+++ b/x-pack/elastic-agent/_meta/config/elastic-agent.docker.yml.tmpl
@@ -89,13 +89,18 @@ datasources:
 #   install_path: "${path.data}/install"
 
 # process:
-#   # minimal port number for spawned processes
-#   min_port: 10000
-#   # maximum port number for spawned processes
-#   max_port: 30000
 #   # timeout for creating new processes. when process is not successfully created by this timeout
 #   # start operation is considered a failure
 #   spawn_timeout: 30s
+#   # timeout for stopping processes. when process is not stopped by this timeout then the process.
+#   # is force killed
+#   stop_timeout: 30s
+
+# grpc:
+#   # listen address for the GRPC server that spawned processes connect back to.
+#   address: localhost
+#   # port for the GRPC server that spawned processes connect back to.
+#   port: 6789
 
 # retry:
 #   # Enabled determines whether retry is possible. Default is false.
diff --git a/x-pack/elastic-agent/elastic-agent.docker.yml b/x-pack/elastic-agent/elastic-agent.docker.yml
index fc7edf73413..a4effcf24f8 100644
--- a/x-pack/elastic-agent/elastic-agent.docker.yml
+++ b/x-pack/elastic-agent/elastic-agent.docker.yml
@@ -89,13 +89,18 @@ datasources:
 #   install_path: "${path.data}/install"
 
 # process:
-#   # minimal port number for spawned processes
-#   min_port: 10000
-#   # maximum port number for spawned processes
-#   max_port: 30000
 #   # timeout for creating new processes. when process is not successfully created by this timeout
 #   # start operation is considered a failure
 #   spawn_timeout: 30s
+#   # timeout for stopping processes. when process is not stopped by this timeout then the process.
+#   # is force killed
+#   stop_timeout: 30s
+
+# grpc:
+#   # listen address for the GRPC server that spawned processes connect back to.
+#   address: localhost
+#   # port for the GRPC server that spawned processes connect back to.
+#   port: 6789
 
 # retry:
 #   # Enabled determines whether retry is possible. Default is false.
diff --git a/x-pack/elastic-agent/elastic-agent.reference.yml b/x-pack/elastic-agent/elastic-agent.reference.yml
index ae06f02c816..98283027c62 100644
--- a/x-pack/elastic-agent/elastic-agent.reference.yml
+++ b/x-pack/elastic-agent/elastic-agent.reference.yml
@@ -95,13 +95,18 @@ datasources:
 #   install_path: "${path.data}/install"
 
 # process:
-#   # minimal port number for spawned processes
-#   min_port: 10000
-#   # maximum port number for spawned processes
-#   max_port: 30000
 #   # timeout for creating new processes. when process is not successfully created by this timeout
 #   # start operation is considered a failure
 #   spawn_timeout: 30s
+#   # timeout for stopping processes. when process is not stopped by this timeout then the process.
+#   # is force killed
+#   stop_timeout: 30s
+
+# grpc:
+#   # listen address for the GRPC server that spawned processes connect back to.
+#   address: localhost
+#   # port for the GRPC server that spawned processes connect back to.
+#   port: 6789
 
 # retry:
 #   # Enabled determines whether retry is possible. Default is false.
diff --git a/x-pack/elastic-agent/elastic-agent.yml b/x-pack/elastic-agent/elastic-agent.yml
index 72ed3abc1a9..f218468b44f 100644
--- a/x-pack/elastic-agent/elastic-agent.yml
+++ b/x-pack/elastic-agent/elastic-agent.yml
@@ -103,13 +103,18 @@ datasources:
 #   install_path: "${path.data}/install"
 
 # process:
-#   # minimal port number for spawned processes
-#   min_port: 10000
-#   # maximum port number for spawned processes
-#   max_port: 30000
 #   # timeout for creating new processes. when process is not successfully created by this timeout
 #   # start operation is considered a failure
 #   spawn_timeout: 30s
+#   # timeout for stopping processes. when process is not stopped by this timeout then the process.
+#   # is force killed
+#   stop_timeout: 30s
+
+# grpc:
+#   # listen address for the GRPC server that spawned processes connect back to.
+#   address: localhost
+#   # port for the GRPC server that spawned processes connect back to.
+#   port: 6789
 
 # retry:
 #   # Enabled determines whether retry is possible. Default is false.
diff --git a/x-pack/elastic-agent/magefile.go b/x-pack/elastic-agent/magefile.go
index 2b1610a99af..719902e74a7 100644
--- a/x-pack/elastic-agent/magefile.go
+++ b/x-pack/elastic-agent/magefile.go
@@ -12,6 +12,7 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"runtime"
 	"strings"
 	"time"
 
@@ -165,8 +166,12 @@ func (Build) Clean() {
 func (Build) TestBinaries() error {
 	p := filepath.Join("pkg", "agent", "operation", "tests", "scripts")
 
+	binaryName := "configurable"
+	if runtime.GOOS == "windows" {
+		binaryName += ".exe"
+	}
 	return combineErr(
-		RunGo("build", "-o", filepath.Join(p, "configurable-1.0-darwin-x86", "configurable"), filepath.Join(p, "configurable-1.0-darwin-x86", "main.go")),
+		RunGo("build", "-o", filepath.Join(p, "configurable-1.0-darwin-x86_64", binaryName), filepath.Join(p, "configurable-1.0-darwin-x86_64", "main.go")),
 	)
 }
 
diff --git a/x-pack/elastic-agent/pkg/agent/application/local_mode.go b/x-pack/elastic-agent/pkg/agent/application/local_mode.go
index 4ad8f27c7f0..82bddf4d8dc 100644
--- a/x-pack/elastic-agent/pkg/agent/application/local_mode.go
+++ b/x-pack/elastic-agent/pkg/agent/application/local_mode.go
@@ -13,7 +13,9 @@ import (
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/errors"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/config"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/logger"
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/app"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/app/monitoring"
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/server"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/dir"
 	reporting "github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/reporter"
 	logreporter "github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/reporter/log"
@@ -39,6 +41,7 @@ type Local struct {
 	log         *logger.Logger
 	source      source
 	agentInfo   *info.AgentInfo
+	srv         *server.Server
 }
 
 type source interface {
@@ -78,6 +81,10 @@ func newLocal(
 	}
 
 	localApplication.bgContext, localApplication.cancelCtxFn = context.WithCancel(ctx)
+	localApplication.srv, err = server.NewFromConfig(log, rawConfig, &app.ApplicationStatusHandler{})
+	if err != nil {
+		return nil, errors.New(err, "initialize GRPC listener")
+	}
 
 	reporter := reporting.NewReporter(localApplication.bgContext, log, localApplication.agentInfo, logR)
 
@@ -86,7 +93,7 @@ func newLocal(
 		return nil, errors.New(err, "failed to initialize monitoring")
 	}
 
-	router, err := newRouter(log, streamFactory(localApplication.bgContext, rawConfig, nil, reporter, monitor))
+	router, err := newRouter(log, streamFactory(localApplication.bgContext, rawConfig, localApplication.srv, reporter, monitor))
 	if err != nil {
 		return nil, errors.New(err, "fail to initialize pipeline router")
 	}
@@ -113,6 +120,9 @@ func (l *Local) Start() error {
 	l.log.Info("Agent is starting")
 	defer l.log.Info("Agent is stopped")
 
+	if err := l.srv.Start(); err != nil {
+		return err
+	}
 	if err := l.source.Start(); err != nil {
 		return err
 	}
@@ -123,6 +133,7 @@ func (l *Local) Start() error {
 // Stop stops a local agent.
 func (l *Local) Stop() error {
 	l.cancelCtxFn()
+	l.srv.Stop()
 	return l.source.Stop()
 }
 
diff --git a/x-pack/elastic-agent/pkg/agent/application/managed_mode.go b/x-pack/elastic-agent/pkg/agent/application/managed_mode.go
index 269287446db..3991045518f 100644
--- a/x-pack/elastic-agent/pkg/agent/application/managed_mode.go
+++ b/x-pack/elastic-agent/pkg/agent/application/managed_mode.go
@@ -11,6 +11,8 @@ import (
 	"net/http"
 	"net/url"
 
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/app"
+
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/application/filters"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/application/info"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/errors"
@@ -18,6 +20,7 @@ import (
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/config"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/logger"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/app/monitoring"
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/server"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/fleetapi"
 	reporting "github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/reporter"
 	fleetreporter "github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/reporter/fleet"
@@ -44,6 +47,7 @@ type Managed struct {
 	api         apiClient
 	agentInfo   *info.AgentInfo
 	gateway     *fleetGateway
+	srv         *server.Server
 }
 
 func newManaged(
@@ -110,6 +114,10 @@ func newManaged(
 	}
 
 	managedApplication.bgContext, managedApplication.cancelCtxFn = context.WithCancel(ctx)
+	managedApplication.srv, err = server.NewFromConfig(log, rawConfig, &app.ApplicationStatusHandler{})
+	if err != nil {
+		return nil, errors.New(err, "initialize GRPC listener")
+	}
 
 	logR := logreporter.NewReporter(log, cfg.Reporting.Log)
 	fleetR, err := fleetreporter.NewReporter(agentInfo, log, cfg.Reporting.Fleet)
@@ -123,7 +131,7 @@ func newManaged(
 		return nil, errors.New(err, "failed to initialize monitoring")
 	}
 
-	router, err := newRouter(log, streamFactory(managedApplication.bgContext, rawConfig, client, combinedReporter, monitor))
+	router, err := newRouter(log, streamFactory(managedApplication.bgContext, rawConfig, managedApplication.srv, combinedReporter, monitor))
 	if err != nil {
 		return nil, errors.New(err, "fail to initialize pipeline router")
 	}
@@ -200,6 +208,9 @@ func newManaged(
 // Start starts a managed elastic-agent.
 func (m *Managed) Start() error {
 	m.log.Info("Agent is starting")
+	if err := m.srv.Start(); err != nil {
+		return err
+	}
 	m.gateway.Start()
 	return nil
 }
@@ -208,6 +219,7 @@ func (m *Managed) Start() error {
 func (m *Managed) Stop() error {
 	defer m.log.Info("Agent is stopped")
 	m.cancelCtxFn()
+	m.srv.Stop()
 	return nil
 }
 
diff --git a/x-pack/elastic-agent/pkg/agent/application/stream.go b/x-pack/elastic-agent/pkg/agent/application/stream.go
index 1b9fda77cc9..0b3a73768c3 100644
--- a/x-pack/elastic-agent/pkg/agent/application/stream.go
+++ b/x-pack/elastic-agent/pkg/agent/application/stream.go
@@ -19,6 +19,7 @@ import (
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/config"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/logger"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/app/monitoring"
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/server"
 )
 
 // EventProcessor is an processor of application event
@@ -56,10 +57,10 @@ func (b *operatorStream) Execute(cfg *configRequest) error {
 	return b.configHandler.HandleConfig(cfg)
 }
 
-func streamFactory(ctx context.Context, cfg *config.Config, client sender, r reporter, m monitoring.Monitor) func(*logger.Logger, routingKey) (stream, error) {
+func streamFactory(ctx context.Context, cfg *config.Config, srv *server.Server, r reporter, m monitoring.Monitor) func(*logger.Logger, routingKey) (stream, error) {
 	return func(log *logger.Logger, id routingKey) (stream, error) {
 		// new operator per stream to isolate processes without using tags
-		operator, err := newOperator(ctx, log, id, cfg, r, m)
+		operator, err := newOperator(ctx, log, id, cfg, srv, r, m)
 		if err != nil {
 			return nil, err
 		}
@@ -71,7 +72,7 @@ func streamFactory(ctx context.Context, cfg *config.Config, client sender, r rep
 	}
 }
 
-func newOperator(ctx context.Context, log *logger.Logger, id routingKey, config *config.Config, r reporter, m monitoring.Monitor) (*operation.Operator, error) {
+func newOperator(ctx context.Context, log *logger.Logger, id routingKey, config *config.Config, srv *server.Server, r reporter, m monitoring.Monitor) (*operation.Operator, error) {
 	operatorConfig := operatorCfg.DefaultConfig()
 	if err := config.Unpack(&operatorConfig); err != nil {
 		return nil, err
@@ -102,6 +103,7 @@ func newOperator(ctx context.Context, log *logger.Logger, id routingKey, config
 		verifier,
 		installer,
 		stateResolver,
+		srv,
 		r,
 		m,
 	)
diff --git a/x-pack/elastic-agent/pkg/agent/operation/common_test.go b/x-pack/elastic-agent/pkg/agent/operation/common_test.go
index 4576674f735..ca58a54fac0 100644
--- a/x-pack/elastic-agent/pkg/agent/operation/common_test.go
+++ b/x-pack/elastic-agent/pkg/agent/operation/common_test.go
@@ -6,9 +6,14 @@ package operation
 
 import (
 	"context"
+	"os"
+	"path/filepath"
+	"runtime"
 	"testing"
 	"time"
 
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/server"
+
 	operatorCfg "github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/operation/config"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/stateresolver"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/artifact"
@@ -22,9 +27,10 @@ import (
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/retry"
 )
 
-var installPath = "tests/scripts"
+var downloadPath = getAbsPath("tests/downloads")
+var installPath = getAbsPath("tests/scripts")
 
-func getTestOperator(t *testing.T, installPath string) (*Operator, *operatorCfg.Config) {
+func getTestOperator(t *testing.T, downloadPath string, installPath string, p *app.Descriptor) (*Operator, *operatorCfg.Config) {
 	operatorConfig := &operatorCfg.Config{
 		RetryConfig: &retry.Config{
 			Enabled:      true,
@@ -34,7 +40,8 @@ func getTestOperator(t *testing.T, installPath string) (*Operator, *operatorCfg.
 		},
 		ProcessConfig: &process.Config{},
 		DownloadConfig: &artifact.Config{
-			InstallPath: installPath,
+			TargetDirectory: downloadPath,
+			InstallPath:     installPath,
 		},
 	}
 
@@ -53,8 +60,16 @@ func getTestOperator(t *testing.T, installPath string) (*Operator, *operatorCfg.
 	if err != nil {
 		t.Fatal(err)
 	}
+	srv, err := server.New(l, ":0", &app.ApplicationStatusHandler{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = srv.Start()
+	if err != nil {
+		t.Fatal(err)
+	}
 
-	operator, err := NewOperator(context.Background(), l, "p1", cfg, fetcher, verifier, installer, stateResolver, nil, noop.NewMonitor())
+	operator, err := NewOperator(context.Background(), l, "p1", cfg, fetcher, verifier, installer, stateResolver, srv, nil, noop.NewMonitor())
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -62,11 +77,24 @@ func getTestOperator(t *testing.T, installPath string) (*Operator, *operatorCfg.
 	operator.config.DownloadConfig.OperatingSystem = "darwin"
 	operator.config.DownloadConfig.Architecture = "32"
 
+	// make the download path so the `operation_verify` can ensure the path exists
+	downloadConfig := operator.config.DownloadConfig
+	fullPath, err := artifact.GetArtifactPath(p.BinaryName(), p.Version(), downloadConfig.OS(), downloadConfig.Arch(), downloadConfig.TargetDirectory)
+	if err != nil {
+		t.Fatal(err)
+	}
+	createFile(t, fullPath)
+
 	return operator, operatorConfig
 }
 
 func getLogger() *logger.Logger {
-	l, _ := logger.New()
+	cfg, _ := config.NewConfigFrom(map[string]interface{}{
+		"logging": map[string]interface{}{
+			"level": "error",
+		},
+	})
+	l, _ := logger.NewFromConfig(cfg)
 	return l
 }
 
@@ -74,12 +102,39 @@ func getProgram(binary, version string) *app.Descriptor {
 	downloadCfg := &artifact.Config{
 		InstallPath:     installPath,
 		OperatingSystem: "darwin",
+		Architecture:    "32",
 	}
 	return app.NewDescriptor(binary, version, downloadCfg, nil)
 }
 
-type TestConfig struct {
-	TestFile string
+func getAbsPath(path string) string {
+	_, filename, _, _ := runtime.Caller(0)
+	return filepath.Join(filepath.Dir(filename), path)
+}
+
+func createFile(t *testing.T, path string) {
+	_, err := os.Stat(path)
+	if os.IsNotExist(err) {
+		file, err := os.Create(path)
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer file.Close()
+	}
+}
+
+func waitFor(t *testing.T, check func() error) {
+	started := time.Now()
+	for {
+		err := check()
+		if err == nil {
+			return
+		}
+		if time.Now().Sub(started) >= 15*time.Second {
+			t.Fatalf("check timed out after 15 second: %s", err)
+		}
+		time.Sleep(10 * time.Millisecond)
+	}
 }
 
 type DummyDownloader struct{}
diff --git a/x-pack/elastic-agent/pkg/agent/operation/monitoring_test.go b/x-pack/elastic-agent/pkg/agent/operation/monitoring_test.go
index 371ddbda308..12f9ca37d4e 100644
--- a/x-pack/elastic-agent/pkg/agent/operation/monitoring_test.go
+++ b/x-pack/elastic-agent/pkg/agent/operation/monitoring_test.go
@@ -9,6 +9,8 @@ import (
 	"testing"
 	"time"
 
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/server"
+
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/configrequest"
 	operatorCfg "github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/operation/config"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/stateresolver"
@@ -123,9 +125,13 @@ func getMonitorableTestOperator(t *testing.T, installPath string, m monitoring.M
 	if err != nil {
 		t.Fatal(err)
 	}
-	ctx := context.Background()
+	srv, err := server.New(l, ":0", &app.ApplicationStatusHandler{})
+	if err != nil {
+		t.Fatal(err)
+	}
 
-	operator, err := NewOperator(ctx, l, "p1", cfg, fetcher, verifier, installer, stateResolver, nil, m)
+	ctx := context.Background()
+	operator, err := NewOperator(ctx, l, "p1", cfg, fetcher, verifier, installer, stateResolver, srv, nil, m)
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/x-pack/elastic-agent/pkg/agent/operation/operation.go b/x-pack/elastic-agent/pkg/agent/operation/operation.go
index fdaa7da31d3..cfc11cceae7 100644
--- a/x-pack/elastic-agent/pkg/agent/operation/operation.go
+++ b/x-pack/elastic-agent/pkg/agent/operation/operation.go
@@ -23,7 +23,7 @@ type operation interface {
 	// examples:
 	// - Start does not need to run if process is running
 	// - Fetch does not need to run if package is already present
-	Check() (bool, error)
+	Check(application Application) (bool, error)
 	// Run runs the operation
 	Run(ctx context.Context, application Application) error
 }
@@ -34,8 +34,8 @@ type Application interface {
 	Start(ctx context.Context, p app.Taggable, cfg map[string]interface{}) error
 	Stop()
 	Configure(ctx context.Context, config map[string]interface{}) error
-	State() state.State
 	Monitor() monitoring.Monitor
+	State() state.State
 }
 
 // Descriptor defines a program which needs to be run.
diff --git a/x-pack/elastic-agent/pkg/agent/operation/operation_config.go b/x-pack/elastic-agent/pkg/agent/operation/operation_config.go
index b50aef4de7a..8fe6af3056e 100644
--- a/x-pack/elastic-agent/pkg/agent/operation/operation_config.go
+++ b/x-pack/elastic-agent/pkg/agent/operation/operation_config.go
@@ -46,11 +46,10 @@ func (o *operationConfig) Name() string {
 	return "operation-config"
 }
 
-// Check checks whether operation needs to be run
-// examples:
-// - Start does not need to run if process is running
-// - Fetch does not need to run if package is already present
-func (o *operationConfig) Check() (bool, error) { return true, nil }
+// Check checks whether config needs to be run.
+//
+// Always returns true.
+func (o *operationConfig) Check(_ Application) (bool, error) { return true, nil }
 
 // Run runs the operation
 func (o *operationConfig) Run(ctx context.Context, application Application) (err error) {
diff --git a/x-pack/elastic-agent/pkg/agent/operation/operation_fetch.go b/x-pack/elastic-agent/pkg/agent/operation/operation_fetch.go
index 3c25287e1c7..bda22a861e0 100644
--- a/x-pack/elastic-agent/pkg/agent/operation/operation_fetch.go
+++ b/x-pack/elastic-agent/pkg/agent/operation/operation_fetch.go
@@ -46,11 +46,10 @@ func (o *operationFetch) Name() string {
 	return "operation-fetch"
 }
 
-// Check checks whether operation needs to be run
-// examples:
-// - Start does not need to run if process is running
-// - Fetch does not need to run if package is already present
-func (o *operationFetch) Check() (bool, error) {
+// Check checks whether fetch needs to occur.
+//
+// If the artifacts already exists then fetch will not be ran.
+func (o *operationFetch) Check(_ Application) (bool, error) {
 	downloadConfig := o.operatorConfig.DownloadConfig
 	fullPath, err := artifact.GetArtifactPath(o.program.BinaryName(), o.program.Version(), downloadConfig.OS(), downloadConfig.Arch(), downloadConfig.TargetDirectory)
 	if err != nil {
diff --git a/x-pack/elastic-agent/pkg/agent/operation/operation_install.go b/x-pack/elastic-agent/pkg/agent/operation/operation_install.go
index 34faf9a7fc2..0e045cb15df 100644
--- a/x-pack/elastic-agent/pkg/agent/operation/operation_install.go
+++ b/x-pack/elastic-agent/pkg/agent/operation/operation_install.go
@@ -45,11 +45,10 @@ func (o *operationInstall) Name() string {
 	return "operation-install"
 }
 
-// Check checks whether operation needs to be run
-// examples:
-// - Start does not need to run if process is running
-// - Fetch does not need to run if package is already present
-func (o *operationInstall) Check() (bool, error) {
+// Check checks whether install needs to be ran.
+//
+// If the installation directory already exists then it will not be ran.
+func (o *operationInstall) Check(_ Application) (bool, error) {
 	installDir := o.program.Directory()
 	_, err := os.Stat(installDir)
 	return os.IsNotExist(err), nil
diff --git a/x-pack/elastic-agent/pkg/agent/operation/operation_remove.go b/x-pack/elastic-agent/pkg/agent/operation/operation_remove.go
index fb3370ba156..587d546bb8f 100644
--- a/x-pack/elastic-agent/pkg/agent/operation/operation_remove.go
+++ b/x-pack/elastic-agent/pkg/agent/operation/operation_remove.go
@@ -24,11 +24,10 @@ func (o *operationRemove) Name() string {
 	return "operation-remove"
 }
 
-// Check checks whether operation needs to be run
-// examples:
-// - Start does not need to run if process is running
-// - Fetch does not need to run if package is already present
-func (o *operationRemove) Check() (bool, error) {
+// Check checks whether remove needs to run.
+//
+// Always returns false.
+func (o *operationRemove) Check(_ Application) (bool, error) {
 	return false, nil
 }
 
diff --git a/x-pack/elastic-agent/pkg/agent/operation/operation_start.go b/x-pack/elastic-agent/pkg/agent/operation/operation_start.go
index 803276f6801..d6dc4f3d389 100644
--- a/x-pack/elastic-agent/pkg/agent/operation/operation_start.go
+++ b/x-pack/elastic-agent/pkg/agent/operation/operation_start.go
@@ -7,6 +7,8 @@ package operation
 import (
 	"context"
 
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/state"
+
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/errors"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/operation/config"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/logger"
@@ -47,14 +49,16 @@ func (o *operationStart) Name() string {
 	return "operation-start"
 }
 
-// Check checks whether operation needs to be run
-// examples:
-// - Start does not need to run if process is running
-// - Fetch does not need to run if package is already present
-func (o *operationStart) Check() (bool, error) {
-	// TODO: get running processes and compare hashes
-
-	return true, nil
+// Check checks whether application needs to be started.
+//
+// Only starts the application when in stopped state, any other state
+// and the application is handled by the life cycle inside of the `Application`
+// implementation.
+func (o *operationStart) Check(application Application) (bool, error) {
+	if application.State().Status == state.Stopped {
+		return true, nil
+	}
+	return false, nil
 }
 
 // Run runs the operation
diff --git a/x-pack/elastic-agent/pkg/agent/operation/operation_stop.go b/x-pack/elastic-agent/pkg/agent/operation/operation_stop.go
index b6206fd0d54..222e933b877 100644
--- a/x-pack/elastic-agent/pkg/agent/operation/operation_stop.go
+++ b/x-pack/elastic-agent/pkg/agent/operation/operation_stop.go
@@ -7,6 +7,8 @@ package operation
 import (
 	"context"
 
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/state"
+
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/errors"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/operation/config"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/logger"
@@ -36,12 +38,14 @@ func (o *operationStop) Name() string {
 	return "operation-stop"
 }
 
-// Check checks whether operation needs to be run
-// examples:
-// - Start does not need to run if process is running
-// - Fetch does not need to run if package is already present
-func (o *operationStop) Check() (bool, error) {
-	return true, nil
+// Check checks whether application needs to be stopped.
+//
+// If the application state is not stopped then stop should be performed.
+func (o *operationStop) Check(application Application) (bool, error) {
+	if application.State().Status != state.Stopped {
+		return true, nil
+	}
+	return false, nil
 }
 
 // Run runs the operation
diff --git a/x-pack/elastic-agent/pkg/agent/operation/operation_verify.go b/x-pack/elastic-agent/pkg/agent/operation/operation_verify.go
index b3ffbee3dcd..63f987b748a 100644
--- a/x-pack/elastic-agent/pkg/agent/operation/operation_verify.go
+++ b/x-pack/elastic-agent/pkg/agent/operation/operation_verify.go
@@ -42,11 +42,10 @@ func (o *operationVerify) Name() string {
 	return "operation-verify"
 }
 
-// Check checks whether operation needs to be run
-// examples:
-// - Start does not need to run if process is running
-// - Fetch does not need to run if package is already present
-func (o *operationVerify) Check() (bool, error) {
+// Check checks whether verify needs to occur.
+//
+// Only if the artifacts exists does it need to be verified.
+func (o *operationVerify) Check(_ Application) (bool, error) {
 	downloadConfig := o.operatorConfig.DownloadConfig
 	fullPath, err := artifact.GetArtifactPath(o.program.BinaryName(), o.program.Version(), downloadConfig.OS(), downloadConfig.Arch(), downloadConfig.TargetDirectory)
 	if err != nil {
diff --git a/x-pack/elastic-agent/pkg/agent/operation/operator.go b/x-pack/elastic-agent/pkg/agent/operation/operator.go
index 10e259bd8be..eb80f05eb1c 100644
--- a/x-pack/elastic-agent/pkg/agent/operation/operator.go
+++ b/x-pack/elastic-agent/pkg/agent/operation/operator.go
@@ -11,6 +11,8 @@ import (
 	"strings"
 	"sync"
 
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/state"
+
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/configrequest"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/errors"
 	operatorCfg "github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/operation/config"
@@ -22,8 +24,7 @@ import (
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/logger"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/app"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/app/monitoring"
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/state"
-	rconfig "github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/remoteconfig/grpc"
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/server"
 )
 
 const (
@@ -43,6 +44,7 @@ type Operator struct {
 	config         *operatorCfg.Config
 	handlers       map[string]handleFunc
 	stateResolver  *stateresolver.StateResolver
+	srv            *server.Server
 	eventProcessor callbackHooks
 	monitor        monitoring.Monitor
 	isMonitoring   int
@@ -67,6 +69,7 @@ func NewOperator(
 	verifier download.Verifier,
 	installer install.Installer,
 	stateResolver *stateresolver.StateResolver,
+	srv *server.Server,
 	eventProcessor callbackHooks,
 	monitor monitoring.Monitor) (*Operator, error) {
 
@@ -92,6 +95,7 @@ func NewOperator(
 		verifier:       verifier,
 		installer:      installer,
 		stateResolver:  stateResolver,
+		srv:            srv,
 		apps:           make(map[string]Application),
 		eventProcessor: eventProcessor,
 		monitor:        monitor,
@@ -106,7 +110,7 @@ func NewOperator(
 }
 
 // State describes the current state of the system.
-// Reports all known beats and theirs states. Whether they are running
+// Reports all known applications and theirs states. Whether they are running
 // or not, and if they are information about process is also present.
 func (o *Operator) State() map[string]state.State {
 	result := make(map[string]state.State)
@@ -200,7 +204,7 @@ func (o *Operator) runFlow(p Descriptor, operations []operation) error {
 			return err
 		}
 
-		shouldRun, err := op.Check()
+		shouldRun, err := op.Check(app)
 		if err != nil {
 			return err
 		}
@@ -216,6 +220,11 @@ func (o *Operator) runFlow(p Descriptor, operations []operation) error {
 		}
 	}
 
+	// when application is stopped remove from the operator
+	if app.State().Status == state.Stopped {
+		o.deleteApp(p)
+	}
+
 	return nil
 }
 
@@ -230,8 +239,6 @@ func (o *Operator) getApp(p Descriptor) (Application, error) {
 		return a, nil
 	}
 
-	factory := rconfig.NewConnFactory(o.config.RetryConfig.Delay, o.config.RetryConfig.MaxDelay)
-
 	specifier, ok := p.(app.Specifier)
 	if !ok {
 		return nil, fmt.Errorf("descriptor is not an app.Specifier")
@@ -245,7 +252,7 @@ func (o *Operator) getApp(p Descriptor) (Application, error) {
 		o.pipelineID,
 		o.config.LoggingConfig.Level.String(),
 		specifier,
-		factory,
+		o.srv,
 		o.config,
 		o.logger,
 		o.eventProcessor.OnFailing,
@@ -259,6 +266,16 @@ func (o *Operator) getApp(p Descriptor) (Application, error) {
 	return a, nil
 }
 
+func (o *Operator) deleteApp(p Descriptor) {
+	o.appsLock.Lock()
+	defer o.appsLock.Unlock()
+
+	id := p.ID()
+
+	o.logger.Debugf("operator is removing %s from app collection: %v", p.ID(), o.apps)
+	delete(o.apps, id)
+}
+
 func isMonitorable(descriptor Descriptor) bool {
 	isSidecar := app.IsSidecar(descriptor)
 	return !isSidecar // everything is monitorable except sidecar
diff --git a/x-pack/elastic-agent/pkg/agent/operation/operator_test.go b/x-pack/elastic-agent/pkg/agent/operation/operator_test.go
index 76ffdb432d5..2db96b30f1a 100644
--- a/x-pack/elastic-agent/pkg/agent/operation/operator_test.go
+++ b/x-pack/elastic-agent/pkg/agent/operation/operator_test.go
@@ -2,8 +2,6 @@
 // or more contributor license agreements. Licensed under the Elastic License;
 // you may not use this file except in compliance with the Elastic License.
 
-// +build linux darwin
-
 package operation
 
 import (
@@ -11,8 +9,10 @@ import (
 	"math/rand"
 	"os"
 	"path/filepath"
+	"runtime"
 	"testing"
-	"time"
+
+	"github.com/elastic/elastic-agent-client/v7/pkg/proto"
 
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/program"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/state"
@@ -20,87 +20,78 @@ import (
 
 func TestMain(m *testing.M) {
 	// init supported with test cases
-	shortSpec := program.Spec{
-		Name: "short",
-		Cmd:  "/bin/echo",
-		Args: []string{"123"},
-	}
-	longSpec := program.Spec{
-		Name: "long",
-		Cmd:  "/bin/sh",
-		Args: []string{"-c", "echo 123; sleep 100"},
-	}
 	configurableSpec := program.Spec{
 		Name: "configurable",
 		Cmd:  "configurable",
 		Args: []string{},
 	}
 
-	program.Supported = append(program.Supported, shortSpec, longSpec, configurableSpec)
+	program.Supported = append(program.Supported, configurableSpec)
+
+	p := getProgram("configurable", "1.0")
+	spec := p.Spec()
+	path := spec.BinaryPath
+	if runtime.GOOS == "windows" {
+		path += ".exe"
+	}
+	if s, err := os.Stat(path); err != nil || s == nil {
+		panic(fmt.Errorf("binary not available %s", spec.BinaryPath))
+	}
+
+	os.Exit(m.Run())
 }
 
 func TestNotSupported(t *testing.T) {
 	p := getProgram("notsupported", "1.0")
 
-	operator, _ := getTestOperator(t, "tests/scripts")
+	operator, _ := getTestOperator(t, downloadPath, installPath, p)
 	err := operator.start(p, nil)
 	if err == nil {
 		t.Fatal("was expecting error but got none")
 	}
 }
 
-func TestShortRun(t *testing.T) {
-	p := getProgram("short", "1.0")
+func TestConfigurableRun(t *testing.T) {
+	p := getProgram("configurable", "1.0")
 
-	operator, _ := getTestOperator(t, "tests/scripts")
+	operator, _ := getTestOperator(t, downloadPath, installPath, p)
 	if err := operator.start(p, nil); err != nil {
 		t.Fatal(err)
 	}
+	defer operator.stop(p) // failure catch, to ensure no sub-process stays running
 
-	// let the watcher kick in
-	<-time.After(1 * time.Second)
-
-	items := operator.State()
-	if len(items) == 1 && items[p.ID()].Status == state.Running {
-		t.Fatalf("Process reattach info not stopped %#v, %+v", items, items[p.ID()].Status)
-	}
+	waitFor(t, func() error {
+		items := operator.State()
+		item, ok := items[p.ID()]
+		if !ok {
+			return fmt.Errorf("no state for process")
+		}
+		if item.Status != state.Running {
+			return fmt.Errorf("process never went to running")
+		}
+		return nil
+	})
 
-	os.Remove(filepath.Join(operator.config.DownloadConfig.InstallPath, "short--1.0.yml"))
-}
-
-func TestShortRunInvalid(t *testing.T) {
-	p := getProgram("bumblebee", "")
-	operator, _ := getTestOperator(t, "/bin")
-	if err := operator.start(p, nil); err == nil {
-		t.Fatal(err)
-	}
-
-	// let the watcher kick in
-	<-time.After(1 * time.Second)
-
-	items := operator.State()
-	if len(items) == 1 && items[p.ID()].Status == state.Running {
-		t.Fatalf("Process reattach info not stopped %#v, %+v", items, items[p.ID()].Status)
-	}
-}
-
-func TestLongRunWithStop(t *testing.T) {
-	p := getProgram("long", "1.0")
-
-	operator, _ := getTestOperator(t, "tests/scripts")
-	if err := operator.start(p, nil); err != nil {
-		t.Fatal(err)
+	// try to configure
+	cfg := make(map[string]interface{})
+	tstFilePath := filepath.Join(os.TempDir(), fmt.Sprintf("tmp%d", rand.Uint32()))
+	cfg["TestFile"] = tstFilePath
+	if err := operator.pushConfig(p, cfg); err != nil {
+		t.Fatalf("failed to config: %v", err)
 	}
 
-	// wait for watcher so we know it was now cancelled immediately
-	<-time.After(1 * time.Second)
+	waitFor(t, func() error {
+		if s, err := os.Stat(tstFilePath); err != nil || s == nil {
+			return fmt.Errorf("failed to create a file using Config call %s", tstFilePath)
+		}
+		return nil
+	})
 
 	items := operator.State()
 	item0, ok := items[p.ID()]
 	if !ok || item0.Status != state.Running {
-		t.Fatalf("Process not running %#v", items)
+		t.Fatalf("Process no longer running after config %#v", items)
 	}
-
 	pid := item0.ProcessInfo.PID
 
 	// stop the process
@@ -108,15 +99,14 @@ func TestLongRunWithStop(t *testing.T) {
 		t.Fatalf("Failed to stop process with PID %d: %v", pid, err)
 	}
 
-	// let the watcher kick in
-	<-time.After(1 * time.Second)
-
-	// check state updated
-	items = operator.State()
-	item1, ok := items[p.ID()]
-	if !ok || item1.Status == state.Running {
-		t.Fatalf("Process state says running after Stop %#v", items)
-	}
+	waitFor(t, func() error {
+		items := operator.State()
+		_, ok := items[p.ID()]
+		if ok {
+			return fmt.Errorf("state for process, should be removed")
+		}
+		return nil
+	})
 
 	// check process stopped
 	proc, err := os.FindProcess(pid)
@@ -125,163 +115,243 @@ func TestLongRunWithStop(t *testing.T) {
 	}
 }
 
-func TestLongRunWithCrash(t *testing.T) {
-	p := getProgram("long", "1.0")
+func TestConfigurableFailed(t *testing.T) {
+	p := getProgram("configurable", "1.0")
 
-	operator, _ := getTestOperator(t, "tests/scripts")
+	operator, _ := getTestOperator(t, downloadPath, installPath, p)
 	if err := operator.start(p, nil); err != nil {
 		t.Fatal(err)
 	}
-
-	// wait for watcher so we know it was now cancelled immediately
-	<-time.After(1 * time.Second)
-
-	items := operator.State()
-	item0, ok := items[p.ID()]
-	if !ok || item0.Status != state.Running {
-		t.Fatalf("Process not running %#v", items)
-	}
-
-	// crash the process
-	pid := item0.ProcessInfo.PID
-	proc, err := os.FindProcess(pid)
-	if err != nil {
-		t.Fatalf("Failed to get process with PID %d: %v", pid, err)
-	}
-	if err := proc.Kill(); err != nil {
-		t.Fatalf("Failed to kill process with PID %d: %v", pid, err)
+	defer operator.stop(p) // failure catch, to ensure no sub-process stays running
+
+	var pid int
+	waitFor(t, func() error {
+		items := operator.State()
+		item, ok := items[p.ID()]
+		if !ok {
+			return fmt.Errorf("no state for process")
+		}
+		if item.Status != state.Running {
+			return fmt.Errorf("process never went to running")
+		}
+		pid = item.ProcessInfo.PID
+		return nil
+	})
+
+	// try to configure (with failed status)
+	cfg := make(map[string]interface{})
+	tstFilePath := filepath.Join(os.TempDir(), fmt.Sprintf("tmp%d", rand.Uint32()))
+	cfg["TestFile"] = tstFilePath
+	cfg["Status"] = proto.StateObserved_FAILED
+	if err := operator.pushConfig(p, cfg); err != nil {
+		t.Fatalf("failed to config: %v", err)
 	}
 
-	// let the watcher kick in
-	<-time.After(3 * time.Second)
-
-	// check process restarted
-	items = operator.State()
-	item1, ok := items[p.ID()]
-	if !ok || item1.Status != state.Running {
-		t.Fatalf("Process not present after restart %#v", items)
+	// should still create the file
+	waitFor(t, func() error {
+		if s, err := os.Stat(tstFilePath); err != nil || s == nil {
+			return fmt.Errorf("failed to create a file using Config call %s", tstFilePath)
+		}
+		return nil
+	})
+
+	// wait for not running status
+	waitFor(t, func() error {
+		items := operator.State()
+		item, ok := items[p.ID()]
+		if !ok {
+			return fmt.Errorf("no state for process")
+		}
+		if item.Status == state.Running {
+			return fmt.Errorf("process never left running")
+		}
+		return nil
+	})
+
+	// don't send status anymore
+	delete(cfg, "Status")
+	if err := operator.pushConfig(p, cfg); err != nil {
+		t.Fatalf("failed to config: %v", err)
 	}
 
-	newPid := item1.ProcessInfo.PID
-	if pid == newPid {
-		t.Fatalf("Process not restarted, still with the same PID %d", pid)
-	}
+	// check that it restarted (has a new PID)
+	waitFor(t, func() error {
+		items := operator.State()
+		item, ok := items[p.ID()]
+		if !ok {
+			return fmt.Errorf("no state for process")
+		}
+		if item.ProcessInfo == nil {
+			return fmt.Errorf("in restart loop")
+		}
+		if pid == item.ProcessInfo.PID {
+			return fmt.Errorf("process never restarted")
+		}
+		pid = item.ProcessInfo.PID
+		return nil
+	})
+
+	waitFor(t, func() error {
+		items := operator.State()
+		item, ok := items[p.ID()]
+		if !ok {
+			return fmt.Errorf("no state for process")
+		}
+		if item.Status != state.Running {
+			return fmt.Errorf("process never went to back to running")
+		}
+		return nil
+	})
 
-	// stop restarted process
+	// stop the process
 	if err := operator.stop(p); err != nil {
-		t.Fatalf("Failed to stop restarted process %d: %v", newPid, err)
-	}
-}
-
-func TestTwoProcesses(t *testing.T) {
-	p := getProgram("long", "1.0")
-
-	operator, _ := getTestOperator(t, "tests/scripts")
-	if err := operator.start(p, nil); err != nil {
-		t.Fatal(err)
-	}
-
-	// wait for watcher so we know it was now cancelled immediately
-	<-time.After(1 * time.Second)
-
-	items := operator.State()
-	item0, ok := items[p.ID()]
-	if !ok || item0.Status != state.Running {
-		t.Fatalf("Process not running %#v", items)
-	}
-
-	// start the same process again
-	if err := operator.start(p, nil); err != nil {
-		t.Fatal(err)
-	}
-
-	// let the watcher kick in
-	<-time.After(1 * time.Second)
-
-	items = operator.State()
-	item1, ok := items[p.ID()]
-	if !ok || item0.Status != state.Running {
-		t.Fatalf("Process not running %#v", items)
+		t.Fatalf("Failed to stop process with PID %d: %v", pid, err)
 	}
 
-	if item0.ProcessInfo.PID != item1.ProcessInfo.PID {
-		t.Fatal("Process got updated, expected the same")
+	// check process stopped
+	proc, err := os.FindProcess(pid)
+	if err != nil && proc != nil {
+		t.Fatal("Process found")
 	}
-
-	// check process restarted
-	operator.stop(p)
 }
 
-func TestConfigurableRun(t *testing.T) {
+func TestConfigurableCrash(t *testing.T) {
 	p := getProgram("configurable", "1.0")
 
-	spec := p.Spec()
-	if s, err := os.Stat(spec.BinaryPath); err != nil || s == nil {
-		t.Fatalf("binary not available %s", spec.BinaryPath)
-	} else {
-		t.Logf("found file %v", spec.BinaryPath)
-	}
-
-	operator, _ := getTestOperator(t, installPath)
+	operator, _ := getTestOperator(t, downloadPath, installPath, p)
 	if err := operator.start(p, nil); err != nil {
 		t.Fatal(err)
 	}
-
-	// wait for watcher so we know it was now cancelled immediately
-	<-time.After(1 * time.Second)
-
-	items := operator.State()
-	item0, ok := items[p.ID()]
-	if !ok || item0.Status != state.Running {
-		t.Fatalf("Process not running %#v", items)
-	}
-
-	pid := item0.ProcessInfo.PID
-
-	// check it is still running
-	<-time.After(2 * time.Second)
-
-	items = operator.State()
-	item1, ok := items[p.ID()]
-	if !ok || item1.Status != state.Running {
-		t.Fatalf("Process stopped running %#v", items)
-	}
-
-	newPID := item1.ProcessInfo.PID
-	if pid != newPID {
-		t.Fatalf("Process crashed in between first pid: '%v' second pid: '%v'", pid, newPID)
-	}
-
-	// try to configure
+	defer operator.stop(p) // failure catch, to ensure no sub-process stays running
+
+	var pid int
+	waitFor(t, func() error {
+		items := operator.State()
+		item, ok := items[p.ID()]
+		if !ok {
+			return fmt.Errorf("no state for process")
+		}
+		if item.Status != state.Running {
+			return fmt.Errorf("process never went to running")
+		}
+		pid = item.ProcessInfo.PID
+		return nil
+	})
+
+	// try to configure (with failed status)
 	cfg := make(map[string]interface{})
 	tstFilePath := filepath.Join(os.TempDir(), fmt.Sprintf("tmp%d", rand.Uint32()))
 	cfg["TestFile"] = tstFilePath
+	cfg["Crash"] = true
 	if err := operator.pushConfig(p, cfg); err != nil {
 		t.Fatalf("failed to config: %v", err)
 	}
 
-	if s, err := os.Stat(tstFilePath); err != nil || s == nil {
-		t.Fatalf("failed to create a file using Config call %s", tstFilePath)
+	// should still create the file
+	waitFor(t, func() error {
+		if s, err := os.Stat(tstFilePath); err != nil || s == nil {
+			return fmt.Errorf("failed to create a file using Config call %s", tstFilePath)
+		}
+		return nil
+	})
+
+	// wait for not running status
+	waitFor(t, func() error {
+		items := operator.State()
+		item, ok := items[p.ID()]
+		if !ok {
+			return fmt.Errorf("no state for process")
+		}
+		if item.Status == state.Running {
+			return fmt.Errorf("process never left running")
+		}
+		return nil
+	})
+
+	// don't send crash anymore
+	delete(cfg, "Crash")
+	if err := operator.pushConfig(p, cfg); err != nil {
+		t.Fatalf("failed to config: %v", err)
 	}
 
+	// check that it restarted (has a new PID)
+	waitFor(t, func() error {
+		items := operator.State()
+		item, ok := items[p.ID()]
+		if !ok {
+			return fmt.Errorf("no state for process")
+		}
+		if item.ProcessInfo == nil {
+			return fmt.Errorf("in restart loop")
+		}
+		if pid == item.ProcessInfo.PID {
+			return fmt.Errorf("process never restarted")
+		}
+		pid = item.ProcessInfo.PID
+		return nil
+	})
+
+	// let the process get back to ready
+	waitFor(t, func() error {
+		items := operator.State()
+		item, ok := items[p.ID()]
+		if !ok {
+			return fmt.Errorf("no state for process")
+		}
+		if item.Status != state.Running {
+			return fmt.Errorf("process never went to back to running")
+		}
+		return nil
+	})
+
 	// stop the process
 	if err := operator.stop(p); err != nil {
 		t.Fatalf("Failed to stop process with PID %d: %v", pid, err)
 	}
 
-	// let the watcher kick in
-	<-time.After(1 * time.Second)
-
-	// check reattach collection cleaned up
-	items = operator.State()
-	item2, ok := items[p.ID()]
-	if !ok || item2.Status == state.Running {
-		t.Fatalf("Process still running after stop %#v", items)
-	}
-
 	// check process stopped
 	proc, err := os.FindProcess(pid)
 	if err != nil && proc != nil {
 		t.Fatal("Process found")
 	}
 }
+
+func TestConfigurableStartStop(t *testing.T) {
+	p := getProgram("configurable", "1.0")
+
+	operator, _ := getTestOperator(t, downloadPath, installPath, p)
+	defer operator.stop(p) // failure catch, to ensure no sub-process stays running
+
+	// start and stop it 3 times
+	for i := 0; i < 3; i++ {
+		if err := operator.start(p, nil); err != nil {
+			t.Fatal(err)
+		}
+
+		waitFor(t, func() error {
+			items := operator.State()
+			item, ok := items[p.ID()]
+			if !ok {
+				return fmt.Errorf("no state for process")
+			}
+			if item.Status != state.Running {
+				return fmt.Errorf("process never went to running")
+			}
+			return nil
+		})
+
+		// stop the process
+		if err := operator.stop(p); err != nil {
+			t.Fatalf("Failed to stop process: %v", err)
+		}
+
+		waitFor(t, func() error {
+			items := operator.State()
+			_, ok := items[p.ID()]
+			if ok {
+				return fmt.Errorf("state for process, should be removed")
+			}
+			return nil
+		})
+	}
+}
diff --git a/x-pack/elastic-agent/pkg/agent/operation/tests/scripts/configurable-1.0-darwin-x86/main.go b/x-pack/elastic-agent/pkg/agent/operation/tests/scripts/configurable-1.0-darwin-x86/main.go
deleted file mode 100644
index 0ca3be9192f..00000000000
--- a/x-pack/elastic-agent/pkg/agent/operation/tests/scripts/configurable-1.0-darwin-x86/main.go
+++ /dev/null
@@ -1,63 +0,0 @@
-// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
-// or more contributor license agreements. Licensed under the Elastic License;
-// you may not use this file except in compliance with the Elastic License.
-
-package main
-
-import (
-	"context"
-	"os"
-	"path/filepath"
-
-	"gopkg.in/yaml.v2"
-
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/server"
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/remoteconfig/grpc"
-)
-
-func main() {
-	f, _ := os.OpenFile(filepath.Join(os.TempDir(), "testing.out"), os.O_APPEND|os.O_CREATE|os.O_RDWR, 0666)
-	f.WriteString("starting \n")
-	s := &configServer{}
-	if err := server.NewGrpcServer(os.Stdin, s); err != nil {
-		f.WriteString(err.Error())
-		panic(err)
-	}
-	f.WriteString("finished \n")
-}
-
-type configServer struct {
-}
-
-// TestConfig is a configuration for testing Config calls
-type TestConfig struct {
-	TestFile string `config:"TestFile" yaml:"TestFile"`
-}
-
-func (*configServer) Config(ctx context.Context, req *grpc.ConfigRequest) (*grpc.ConfigResponse, error) {
-	cfgString := req.GetConfig()
-
-	testCfg := &TestConfig{}
-	if err := yaml.Unmarshal([]byte(cfgString), &testCfg); err != nil {
-		return &grpc.ConfigResponse{}, err
-	}
-
-	if testCfg.TestFile != "" {
-		tf, err := os.Create(testCfg.TestFile)
-		if err != nil {
-			return &grpc.ConfigResponse{}, err
-		}
-
-		err = tf.Close()
-		if err != nil {
-			return &grpc.ConfigResponse{}, err
-		}
-	}
-
-	return &grpc.ConfigResponse{}, nil
-}
-
-// Status return ok.
-func (*configServer) Status(ctx context.Context, req *grpc.StatusRequest) (*grpc.StatusResponse, error) {
-	return &grpc.StatusResponse{Status: "ok"}, nil
-}
diff --git a/x-pack/elastic-agent/pkg/agent/operation/tests/scripts/configurable-1.0-darwin-x86/README.md b/x-pack/elastic-agent/pkg/agent/operation/tests/scripts/configurable-1.0-darwin-x86_64/README.md
similarity index 100%
rename from x-pack/elastic-agent/pkg/agent/operation/tests/scripts/configurable-1.0-darwin-x86/README.md
rename to x-pack/elastic-agent/pkg/agent/operation/tests/scripts/configurable-1.0-darwin-x86_64/README.md
diff --git a/x-pack/elastic-agent/pkg/agent/operation/tests/scripts/configurable-1.0-darwin-x86_64/main.go b/x-pack/elastic-agent/pkg/agent/operation/tests/scripts/configurable-1.0-darwin-x86_64/main.go
new file mode 100644
index 00000000000..f5de06883cd
--- /dev/null
+++ b/x-pack/elastic-agent/pkg/agent/operation/tests/scripts/configurable-1.0-darwin-x86_64/main.go
@@ -0,0 +1,98 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"gopkg.in/yaml.v2"
+
+	"github.com/elastic/elastic-agent-client/v7/pkg/client"
+	"github.com/elastic/elastic-agent-client/v7/pkg/proto"
+)
+
+func main() {
+	f, _ := os.OpenFile(filepath.Join(os.TempDir(), "testing.out"), os.O_APPEND|os.O_CREATE|os.O_RDWR, 0666)
+	f.WriteString("starting \n")
+	ctx, cancel := context.WithCancel(context.Background())
+	s := &configServer{
+		f:      f,
+		ctx:    ctx,
+		cancel: cancel,
+	}
+	client, err := client.NewFromReader(os.Stdin, s)
+	if err != nil {
+		f.WriteString(err.Error())
+		panic(err)
+	}
+	s.client = client
+	err = client.Start(ctx)
+	if err != nil {
+		f.WriteString(err.Error())
+		panic(err)
+	}
+	<-ctx.Done()
+	f.WriteString("finished \n")
+}
+
+type configServer struct {
+	f      *os.File
+	ctx    context.Context
+	cancel context.CancelFunc
+	client *client.Client
+}
+
+func (s *configServer) OnConfig(cfgString string) {
+	s.client.Status(proto.StateObserved_CONFIGURING, "Writing config file")
+
+	testCfg := &TestConfig{}
+	if err := yaml.Unmarshal([]byte(cfgString), &testCfg); err != nil {
+		s.client.Status(proto.StateObserved_FAILED, fmt.Sprintf("Failed to unmarshall config: %s", err))
+		return
+	}
+
+	if testCfg.TestFile != "" {
+		tf, err := os.Create(testCfg.TestFile)
+		if err != nil {
+			s.client.Status(proto.StateObserved_FAILED, fmt.Sprintf("Failed to create file %s: %s", testCfg.TestFile, err))
+			return
+		}
+
+		err = tf.Close()
+		if err != nil {
+			s.client.Status(proto.StateObserved_FAILED, fmt.Sprintf("Failed to close file %s: %s", testCfg.TestFile, err))
+			return
+		}
+	}
+
+	if testCfg.Crash {
+		os.Exit(2)
+	}
+
+	if testCfg.Status != nil {
+		s.client.Status(*testCfg.Status, "Custom status")
+	} else {
+		s.client.Status(proto.StateObserved_HEALTHY, "Running")
+	}
+}
+
+func (s *configServer) OnStop() {
+	s.client.Status(proto.StateObserved_STOPPING, "Stopping")
+	s.cancel()
+}
+
+func (s *configServer) OnError(err error) {
+	s.f.WriteString(err.Error())
+}
+
+// TestConfig is a configuration for testing Config calls
+type TestConfig struct {
+	TestFile string                      `config:"TestFile" yaml:"TestFile"`
+	Status   *proto.StateObserved_Status `config:"Status" yaml:"Status"`
+	Crash    bool                        `config:"Crash" yaml:"Crash"`
+}
diff --git a/x-pack/elastic-agent/pkg/agent/operation/tests/scripts/long-1.0-darwin-x86/README.md b/x-pack/elastic-agent/pkg/agent/operation/tests/scripts/long-1.0-darwin-x86/README.md
deleted file mode 100644
index 8429c59805c..00000000000
--- a/x-pack/elastic-agent/pkg/agent/operation/tests/scripts/long-1.0-darwin-x86/README.md
+++ /dev/null
@@ -1 +0,0 @@
-Testing program emulating tool which executes and completes with a delay or is long running.
diff --git a/x-pack/elastic-agent/pkg/agent/operation/tests/scripts/short-1.0-darwin-x86/README.md b/x-pack/elastic-agent/pkg/agent/operation/tests/scripts/short-1.0-darwin-x86/README.md
deleted file mode 100644
index 0576a8b3c4e..00000000000
--- a/x-pack/elastic-agent/pkg/agent/operation/tests/scripts/short-1.0-darwin-x86/README.md
+++ /dev/null
@@ -1 +0,0 @@
-Testing program emulating tool which executes and completes immediately
diff --git a/x-pack/elastic-agent/pkg/core/plugin/app/app.go b/x-pack/elastic-agent/pkg/core/plugin/app/app.go
index 2cf2adbdba2..d85f28b49ab 100644
--- a/x-pack/elastic-agent/pkg/core/plugin/app/app.go
+++ b/x-pack/elastic-agent/pkg/core/plugin/app/app.go
@@ -8,10 +8,13 @@ import (
 	"context"
 	"fmt"
 	"os"
-	"path/filepath"
 	"sync"
 	"time"
 
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/state"
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/server"
+	"github.com/elastic/elastic-agent-client/v7/pkg/proto"
+
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/errors"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/operation/config"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/artifact"
@@ -19,8 +22,6 @@ import (
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/app/monitoring"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/process"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/retry"
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/state"
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/remoteconfig"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/tokenbucket"
 )
 
@@ -44,11 +45,13 @@ type Application struct {
 	pipelineID      string
 	logLevel        string
 	spec            Specifier
-	state           state.State
-	grpcClient      remoteconfig.Client
-	clientFactory   remoteconfig.ConnectionCreator
+	srv             *server.Server
+	srvState        *server.ApplicationState
 	limiter         *tokenbucket.Bucket
 	failureReporter ReportFailureFunc
+	startContext    context.Context
+	tag             Taggable
+	state           state.State
 
 	uid int
 	gid int
@@ -73,7 +76,7 @@ func NewApplication(
 	ctx context.Context,
 	id, appName, pipelineID, logLevel string,
 	spec Specifier,
-	factory remoteconfig.ConnectionCreator,
+	srv *server.Server,
 	cfg *config.Config,
 	logger *logger.Logger,
 	failureReporter ReportFailureFunc,
@@ -93,7 +96,7 @@ func NewApplication(
 		pipelineID:      pipelineID,
 		logLevel:        logLevel,
 		spec:            spec,
-		clientFactory:   factory,
+		srv:             srv,
 		processConfig:   cfg.ProcessConfig,
 		downloadConfig:  cfg.DownloadConfig,
 		retryConfig:     cfg.RetryConfig,
@@ -111,6 +114,13 @@ func (a *Application) Monitor() monitoring.Monitor {
 	return a.monitor
 }
 
+// State returns the application state.
+func (a *Application) State() state.State {
+	a.appLock.Lock()
+	defer a.appLock.Unlock()
+	return a.state
+}
+
 // Name returns application name
 func (a *Application) Name() string {
 	return a.name
@@ -121,44 +131,38 @@ func (a *Application) Stop() {
 	a.appLock.Lock()
 	defer a.appLock.Unlock()
 
-	if a.state.Status == state.Running && a.state.ProcessInfo != nil {
-		if closeClient, ok := a.grpcClient.(closer); ok {
-			closeClient.Close()
-		}
-
-		process.Stop(a.logger, a.state.ProcessInfo.PID)
+	if a.state.Status == state.Stopped {
+		return
+	}
 
-		a.state.Status = state.Stopped
-		a.state.ProcessInfo = nil
-		a.grpcClient = nil
-
-		// remove generated configuration if present
-		filename := fmt.Sprintf(configFileTempl, a.id)
-		filePath, err := filepath.Abs(filepath.Join(a.downloadConfig.InstallPath, filename))
-		if err == nil {
-			// ignoring error: not critical
-			os.Remove(filePath)
+	stopSig := os.Interrupt
+	if a.srvState != nil {
+		if err := a.srvState.Stop(a.processConfig.StopTimeout); err != nil {
+			// kill the process if stop through GRPC doesn't work
+			stopSig = os.Kill
 		}
+		a.srvState = nil
+	}
+	if a.state.ProcessInfo != nil {
+		if err := a.state.ProcessInfo.Process.Signal(stopSig); err == nil {
+			// no error on signal, so wait for it to stop
+			_, _ = a.state.ProcessInfo.Process.Wait()
+		}
+		a.state.ProcessInfo = nil
 
 		// cleanup drops
 		a.monitor.Cleanup(a.name, a.pipelineID)
 	}
+	a.state.Status = state.Stopped
+	a.state.Message = "Stopped"
 }
 
-// State returns the state of the application [Running, Stopped].
-func (a *Application) State() state.State {
-	a.appLock.Lock()
-	defer a.appLock.Unlock()
-
-	return a.state
-}
-
-func (a *Application) watch(ctx context.Context, p Taggable, proc *os.Process, cfg map[string]interface{}) {
+func (a *Application) watch(ctx context.Context, p Taggable, proc *process.Info, cfg map[string]interface{}) {
 	go func() {
 		var procState *os.ProcessState
 
 		select {
-		case ps := <-a.waitProc(proc):
+		case ps := <-a.waitProc(proc.Process):
 			procState = ps
 		case <-a.bgContext.Done():
 			a.Stop()
@@ -166,21 +170,23 @@ func (a *Application) watch(ctx context.Context, p Taggable, proc *os.Process, c
 		}
 
 		a.appLock.Lock()
-		s := a.state.Status
-		a.state.Status = state.Stopped
 		a.state.ProcessInfo = nil
-		a.appLock.Unlock()
+		srvState := a.srvState
 
-		if procState.Success() {
+		if srvState == nil || srvState.Expected() == proto.StateExpected_STOPPING {
+			a.appLock.Unlock()
 			return
 		}
 
-		if s == state.Running {
-			// it was a crash, report it async not to block
-			// process management with networking issues
-			go a.reportCrash(ctx)
-			a.Start(ctx, p, cfg)
-		}
+		msg := fmt.Sprintf("Exited with code: %d", procState.ExitCode())
+		a.state.Status = state.Crashed
+		a.state.Message = msg
+		a.appLock.Unlock()
+
+		// it was a crash, report it async not to block
+		// process management with networking issues
+		go a.reportCrash(ctx)
+		a.Start(ctx, p, cfg)
 	}()
 }
 
diff --git a/x-pack/elastic-agent/pkg/core/plugin/app/client.go b/x-pack/elastic-agent/pkg/core/plugin/app/client.go
deleted file mode 100644
index 59d27da6e13..00000000000
--- a/x-pack/elastic-agent/pkg/core/plugin/app/client.go
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
-// or more contributor license agreements. Licensed under the Elastic License;
-// you may not use this file except in compliance with the Elastic License.
-
-package app
-
-// closer close the connection
-type closer interface {
-	Close() error
-}
diff --git a/x-pack/elastic-agent/pkg/core/plugin/app/configure.go b/x-pack/elastic-agent/pkg/core/plugin/app/configure.go
index 55ee1b8d48f..412577afedd 100644
--- a/x-pack/elastic-agent/pkg/core/plugin/app/configure.go
+++ b/x-pack/elastic-agent/pkg/core/plugin/app/configure.go
@@ -6,29 +6,16 @@ package app
 
 import (
 	"context"
-	"net"
-	"time"
 
 	"gopkg.in/yaml.v2"
 
-	"github.com/elastic/beats/v7/libbeat/common/backoff"
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/errors"
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/retry"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/state"
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/remoteconfig"
-)
 
-const (
-	// DefaultTimeout is the default timeout for network calls
-	DefaultTimeout = 60 * time.Second
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/errors"
 )
 
-type backoffClient interface {
-	Backoff() backoff.Backoff
-}
-
 // Configure configures the application with the passed configuration.
-func (a *Application) Configure(ctx context.Context, config map[string]interface{}) (err error) {
+func (a *Application) Configure(_ context.Context, config map[string]interface{}) (err error) {
 	defer func() {
 		if err != nil {
 			// inject App metadata
@@ -36,44 +23,23 @@ func (a *Application) Configure(ctx context.Context, config map[string]interface
 		}
 	}()
 
+	a.appLock.Lock()
+	defer a.appLock.Unlock()
+
 	if a.state.Status == state.Stopped {
 		return errors.New(ErrAppNotRunning)
 	}
-
-	retryFn := func(ctx context.Context) error {
-		a.appLock.Lock()
-		defer a.appLock.Unlock()
-
-		// TODO: check versions(logical clock) in between retries in case newer version sneaked in
-
-		ctx, cancelFn := context.WithTimeout(ctx, DefaultTimeout)
-		defer cancelFn()
-
-		if a.grpcClient == nil {
-			return errors.New(ErrClientNotFound)
-		}
-
-		rawYaml, err := yaml.Marshal(config)
-		if err != nil {
-			return errors.New(err, errors.TypeApplication)
-		}
-
-		configClient, ok := a.grpcClient.(remoteconfig.ConfiguratorClient)
-		if !ok {
-			return errors.New(ErrClientNotConfigurable, errors.TypeApplication)
-		}
-
-		a.logger.Debugf("configuring application %s: %s", a.Name(), string(rawYaml))
-		err = configClient.Config(ctx, string(rawYaml))
-
-		if netErr, ok := err.(net.Error); ok && (netErr.Timeout() || netErr.Temporary()) {
-			// not fatal, we will retry
-			return errors.New(netErr, errors.TypeApplication)
-		}
-
-		// if not transient mark as fatal
-		return retry.ErrorMakeFatal(err)
+	if a.srvState == nil {
+		return errors.New(ErrAppNotRunning)
 	}
 
-	return retry.Do(ctx, a.retryConfig, retryFn)
+	cfgStr, err := yaml.Marshal(config)
+	if err != nil {
+		return errors.New(err, errors.TypeApplication)
+	}
+	err = a.srvState.UpdateConfig(string(cfgStr))
+	if err != nil {
+		return errors.New(err, errors.TypeApplication)
+	}
+	return nil
 }
diff --git a/x-pack/elastic-agent/pkg/core/plugin/app/start.go b/x-pack/elastic-agent/pkg/core/plugin/app/start.go
index 2994d2e205c..aafaff2c4cc 100644
--- a/x-pack/elastic-agent/pkg/core/plugin/app/start.go
+++ b/x-pack/elastic-agent/pkg/core/plugin/app/start.go
@@ -6,35 +6,22 @@ package app
 
 import (
 	"context"
-	"fmt"
-	"os"
+	"io"
 	"path/filepath"
-	"runtime"
-	"strings"
-	"time"
-	"unicode"
+
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/server"
+
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/state"
+
+	"gopkg.in/yaml.v2"
+
+	"github.com/elastic/elastic-agent-client/v7/pkg/proto"
 
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/application/paths"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/errors"
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/authority"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/process"
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/state"
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/remoteconfig"
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/remoteconfig/grpc"
-)
-
-const (
-	configurationFlag     = "-c"
-	configFileTempl       = "%s.yml" // providing beat id
-	configFilePermissions = 0644     // writable only by owner
 )
 
-// ConfiguratorClient is the client connecting elastic-agent and a process
-type stateClient interface {
-	Status(ctx context.Context) (string, error)
-	Close() error
-}
-
 // Start starts the application with a specified config.
 func (a *Application) Start(ctx context.Context, t Taggable, cfg map[string]interface{}) (err error) {
 	defer func() {
@@ -43,17 +30,57 @@ func (a *Application) Start(ctx context.Context, t Taggable, cfg map[string]inte
 			err = errors.New(err, errors.M(errors.MetaKeyAppName, a.name), errors.M(errors.MetaKeyAppName, a.id))
 		}
 	}()
+
+	cfgStr, err := yaml.Marshal(cfg)
+	if err != nil {
+		return err
+	}
+
+	// because `Start` can be called by `ApplicationStatusHandler` to perform a restart on failure
+	// the locking needs to be handled in the correct order.
+	a.appLock.Lock()
+	a.startContext = ctx
+	a.tag = t
+	srvState := a.srvState
+	a.appLock.Unlock()
+
+	// Failed applications can be started again.
+	if srvState != nil {
+		srvState.SetStatus(proto.StateObserved_STARTING, "Starting")
+		srvState.UpdateConfig(string(cfgStr))
+	} else {
+		a.appLock.Lock()
+		a.srvState, err = a.srv.Register(a, string(cfgStr))
+		if err != nil {
+			return err
+		}
+		a.appLock.Unlock()
+	}
+
+	// now that `SetStatus` would call `ApplicationStatusHandler` has occurred the
+	// reset of `Start` can be held by the lock.
 	a.appLock.Lock()
 	defer a.appLock.Unlock()
 
-	if a.state.Status == state.Running {
-		return nil
+	if a.state.Status != state.Stopped {
+		// restarting as it was previously in a different state
+		a.state.Status = state.Restarting
+		a.state.Message = "Restarting"
+	} else {
+		a.state.Status = state.Starting
+		a.state.Message = "Starting"
 	}
 
 	defer func() {
 		if err != nil {
-			// reportError()
-			a.state.Status = state.Stopped
+			if a.srvState != nil {
+				a.srvState.Destroy()
+				a.srvState = nil
+			}
+			if a.state.ProcessInfo != nil {
+				_ = a.state.ProcessInfo.Process.Kill()
+				a.state.ProcessInfo = nil
+			}
 		}
 	}()
 
@@ -61,16 +88,6 @@ func (a *Application) Start(ctx context.Context, t Taggable, cfg map[string]inte
 		return err
 	}
 
-	// TODO: provider -> client
-	ca, err := generateCA()
-	if err != nil {
-		return errors.New(err, errors.TypeSecurity)
-	}
-	processCreds, err := generateConfigurable(ca)
-	if err != nil {
-		return errors.New(err, errors.TypeSecurity)
-	}
-
 	if a.limiter != nil {
 		a.limiter.Add()
 	}
@@ -93,26 +110,28 @@ func (a *Application) Start(ctx context.Context, t Taggable, cfg map[string]inte
 		a.processConfig,
 		a.uid,
 		a.gid,
-		processCreds,
 		spec.Args...)
 	if err != nil {
 		return err
 	}
 
-	a.waitForGrpc(spec, ca)
-
-	a.grpcClient, err = generateClient(a.state.ProcessInfo.Address, a.clientFactory, ca)
-	if err != nil {
-		return errors.New(err, errors.TypeSecurity)
-	}
-	a.state.Status = state.Running
+	// write connect info to stdin
+	go a.writeToStdin(a.srvState, a.state.ProcessInfo.Stdin)
 
 	// setup watcher
-	a.watch(ctx, t, a.state.ProcessInfo.Process, cfg)
+	a.watch(ctx, t, a.state.ProcessInfo, cfg)
 
 	return nil
 }
 
+func (a *Application) writeToStdin(as *server.ApplicationState, wc io.WriteCloser) {
+	err := as.WriteConnInfo(wc)
+	if err != nil {
+		a.logger.Errorf("failed writing connection info to spawned application: %s", err)
+	}
+	_ = wc.Close()
+}
+
 func injectLogLevel(logLevel string, args []string) []string {
 	var level string
 	// Translate to level beat understands
@@ -134,193 +153,7 @@ func injectLogLevel(logLevel string, args []string) []string {
 	return append(args, "-E", "logging.level="+level)
 }
 
-func (a *Application) waitForGrpc(spec ProcessSpec, ca *authority.CertificateAuthority) error {
-	const (
-		rounds        int           = 3
-		roundsTimeout time.Duration = 30 * time.Second
-		retries       int           = 5
-		retryTimeout  time.Duration = 2 * time.Second
-	)
-
-	checkFn := func(ctx context.Context, address string) error {
-		return a.checkGrpcHTTP(ctx, address, ca)
-	}
-	if isPipe(a.state.ProcessInfo.Address) {
-		checkFn = a.checkGrpcPipe
-	}
-
-	for round := 1; round <= rounds; round++ {
-		for retry := 1; retry <= retries; retry++ {
-			c, cancelFn := context.WithTimeout(a.bgContext, retryTimeout)
-			err := checkFn(c, a.state.ProcessInfo.Address)
-			if err == nil {
-				cancelFn()
-				return nil
-			}
-			cancelFn()
-
-			// do not wait on last
-			if retry != retries {
-				select {
-				case <-time.After(retryTimeout):
-				case <-a.bgContext.Done():
-					return nil
-				}
-			}
-		}
-
-		// do not wait on last
-		if round != rounds {
-			select {
-			case <-time.After(time.Duration(round) * roundsTimeout):
-			case <-a.bgContext.Done():
-				return nil
-			}
-		}
-	}
-
-	// do not err out, config calls will fail with after some more retries
-	return nil
-}
-
-func isPipe(address string) bool {
-	address = strings.TrimPrefix(address, "http+")
-	return strings.HasPrefix(address, "file:") ||
-		strings.HasPrefix(address, "unix:") ||
-		strings.HasPrefix(address, "npipe") ||
-		strings.HasPrefix(address, `\\.\pipe\`) ||
-		isWindowsPath(address)
-}
-
-func (a *Application) checkGrpcPipe(ctx context.Context, address string) error {
-	// TODO: not supported yet
-	return nil
-}
-
-func (a *Application) checkGrpcHTTP(ctx context.Context, address string, ca *authority.CertificateAuthority) error {
-	grpcClient, err := generateClient(a.state.ProcessInfo.Address, a.clientFactory, ca)
-	if err != nil {
-		return errors.New(err, errors.TypeSecurity)
-	}
-
-	stateClient, ok := grpcClient.(stateClient)
-	if !ok {
-		// does not support getting state
-		// let successive calls fail/succeed
-		return nil
-	}
-
-	result, err := stateClient.Status(ctx)
-	defer stateClient.Close()
-	if err != nil {
-		return errors.New(err, "getting state failed", errors.TypeNetwork)
-	}
-
-	if strings.ToLower(result) != "ok" {
-		return errors.New(
-			fmt.Sprintf("getting state failed. not ok state received: '%s'", result),
-			errors.TypeNetwork)
-	}
-
-	return nil
-}
-
 func injectDataPath(args []string, pipelineID, id string) []string {
 	dataPath := filepath.Join(paths.Data(), "run", pipelineID, id)
 	return append(args, "-E", "path.data="+dataPath)
 }
-
-func generateCA() (*authority.CertificateAuthority, error) {
-	ca, err := authority.NewCA()
-	if err != nil {
-		return nil, errors.New(err, "app.Start", errors.TypeSecurity)
-	}
-
-	return ca, nil
-}
-
-func generateConfigurable(ca *authority.CertificateAuthority) (*process.Creds, error) {
-	processCreds, err := getProcessCredentials(ca)
-	if err != nil {
-		return nil, errors.New(err, errors.TypeSecurity)
-	}
-
-	return processCreds, nil
-}
-
-func generateClient(address string, factory remoteconfig.ConnectionCreator, ca *authority.CertificateAuthority) (remoteconfig.Client, error) {
-	connectionProvider, err := getConnectionProvider(ca, address)
-	if err != nil {
-		return nil, errors.New(err, errors.TypeNetwork)
-	}
-
-	grpcClient, err := factory.NewConnection(connectionProvider)
-	if err != nil {
-		return nil, errors.New(err, "creating connection", errors.TypeNetwork)
-	}
-
-	return grpcClient, nil
-}
-
-func getConnectionProvider(ca *authority.CertificateAuthority, address string) (*grpc.ConnectionProvider, error) {
-	clientPair, err := ca.GeneratePair()
-	if err != nil {
-		return nil, errors.New(err, errors.TypeNetwork)
-	}
-
-	return grpc.NewConnectionProvider(address, ca.Crt(), clientPair.Key, clientPair.Crt), nil
-}
-
-func updateSpecConfig(spec *ProcessSpec, configPath string) error {
-	// check if config is already provided
-	configIndex := -1
-	for i, v := range spec.Args {
-		if v == configurationFlag {
-			configIndex = i
-			break
-		}
-	}
-
-	if configIndex != -1 {
-		// -c provided
-		if len(spec.Args) == configIndex+1 {
-			// -c is last argument, appending
-			spec.Args = append(spec.Args, configPath)
-		}
-		spec.Args[configIndex+1] = configPath
-		return nil
-	}
-
-	spec.Args = append(spec.Args, configurationFlag, configPath)
-	return nil
-}
-
-func getProcessCredentials(ca *authority.CertificateAuthority) (*process.Creds, error) {
-	// processPK and Cert serves as a server credentials
-	processPair, err := ca.GeneratePair()
-	if err != nil {
-		return nil, errors.New(err, "failed to generate credentials")
-	}
-
-	return &process.Creds{
-		CaCert: ca.Crt(),
-		PK:     processPair.Key,
-		Cert:   processPair.Crt,
-	}, nil
-}
-
-func isWindowsPath(path string) bool {
-	if len(path) < 4 {
-		return false
-	}
-	return unicode.IsLetter(rune(path[0])) && path[1] == ':'
-}
-
-func changeOwner(path string, uid, gid int) error {
-	if runtime.GOOS == "windows" {
-		// on windows it always returns the syscall.EWINDOWS error, wrapped in *PathError
-		return nil
-	}
-
-	return os.Chown(path, uid, gid)
-}
diff --git a/x-pack/elastic-agent/pkg/core/plugin/app/status.go b/x-pack/elastic-agent/pkg/core/plugin/app/status.go
new file mode 100644
index 00000000000..a3039af0c73
--- /dev/null
+++ b/x-pack/elastic-agent/pkg/core/plugin/app/status.go
@@ -0,0 +1,82 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
+package app
+
+import (
+	"context"
+	"fmt"
+
+	"gopkg.in/yaml.v2"
+
+	"github.com/elastic/elastic-agent-client/v7/pkg/proto"
+
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/errors"
+	pstate "github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/state"
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/server"
+)
+
+// ApplicationStatusHandler expects that only Application is registered in the server and updates the
+// current state of the application from the OnStatusChange callback from inside the server.
+//
+// In the case that an application is reported as failed by the server it will then restart the application, unless
+// it expects that the application should be stopping.
+type ApplicationStatusHandler struct{}
+
+// OnStatusChange is the handler called by the GRPC server code.
+//
+// It updates the status of the application and handles restarting the application is needed.
+func (*ApplicationStatusHandler) OnStatusChange(state *server.ApplicationState, status proto.StateObserved_Status, msg string) {
+	app, ok := state.App().(*Application)
+	if !ok {
+		panic(errors.New("only *Application can be registered when using the ApplicationStatusHandler", errors.TypeUnexpected))
+	}
+
+	app.appLock.Lock()
+
+	// If the application is stopped, do not update the state. Stopped is a final state
+	// and should not be overridden.
+	if app.state.Status == pstate.Stopped {
+		app.appLock.Unlock()
+		return
+	}
+
+	app.state.UpdateFromProto(status)
+	app.state.Message = msg
+	if status == proto.StateObserved_FAILED {
+		// ignore when expected state is stopping
+		if state.Expected() == proto.StateExpected_STOPPING {
+			app.appLock.Unlock()
+			return
+		}
+
+		// it was a crash, report it async not to block
+		// process management with networking issues
+		go app.reportCrash(context.Background())
+
+		// kill the process
+		if app.state.ProcessInfo != nil {
+			_ = app.state.ProcessInfo.Process.Kill()
+			app.state.ProcessInfo = nil
+		}
+		ctx := app.startContext
+		tag := app.tag
+		app.appLock.Unlock()
+
+		// it was marshalled to pass into the state, so unmarshall will always succeed
+		var cfg map[string]interface{}
+		_ = yaml.Unmarshal([]byte(state.Config()), &cfg)
+
+		err := app.Start(ctx, tag, cfg)
+		if err != nil {
+			app.logger.Error(errors.New(
+				fmt.Sprintf("application '%s' failed to restart", app.id),
+				errors.TypeApplicationCrash,
+				errors.M(errors.MetaKeyAppName, app.name),
+				errors.M(errors.MetaKeyAppName, app.id)))
+		}
+		return
+	}
+	app.appLock.Unlock()
+}
diff --git a/x-pack/elastic-agent/pkg/core/plugin/process/cmd_cred.go b/x-pack/elastic-agent/pkg/core/plugin/process/cmd_cred.go
index ae254e99897..8b51e2d6265 100644
--- a/x-pack/elastic-agent/pkg/core/plugin/process/cmd_cred.go
+++ b/x-pack/elastic-agent/pkg/core/plugin/process/cmd_cred.go
@@ -7,6 +7,7 @@
 package process
 
 import (
+	"math"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -34,3 +35,7 @@ func getCmd(logger *logger.Logger, path string, env []string, uid, gid int, arg
 
 	return cmd
 }
+
+func isInt32(val int) bool {
+	return val >= 0 && val <= math.MaxInt32
+}
diff --git a/x-pack/elastic-agent/pkg/core/plugin/process/config.go b/x-pack/elastic-agent/pkg/core/plugin/process/config.go
index e8a236b5de4..72e8e466720 100644
--- a/x-pack/elastic-agent/pkg/core/plugin/process/config.go
+++ b/x-pack/elastic-agent/pkg/core/plugin/process/config.go
@@ -8,14 +8,8 @@ import "time"
 
 // Config for fine tuning new process
 type Config struct {
-	MinPortNumber int           `yaml:"min_port" config:"min_port"`
-	MaxPortNumber int           `yaml:"max_port" config:"max_port"`
-	SpawnTimeout  time.Duration `yaml:"spawn_timeout" config:"spawn_timeout"`
-
-	// Transport is one of `unix` or `tcp`. `unix` uses unix sockets and is not supported on windows.
-	// Windows falls back to `tcp` regardless of configuration.
-	// With invalid configuration fallback to `tcp` is used as well.
-	Transport string
+	SpawnTimeout time.Duration `yaml:"spawn_timeout" config:"spawn_timeout"`
+	StopTimeout  time.Duration `yaml:"stop_timeout" config:"stop_timeout"`
 
 	// TODO: cgroups and namespaces
 }
@@ -23,8 +17,7 @@ type Config struct {
 // DefaultConfig creates a config with pre-set default values.
 func DefaultConfig() *Config {
 	return &Config{
-		MinPortNumber: 10000,
-		MaxPortNumber: 30000,
-		SpawnTimeout:  30 * time.Second,
+		SpawnTimeout: 30 * time.Second,
+		StopTimeout:  30 * time.Second,
 	}
 }
diff --git a/x-pack/elastic-agent/pkg/core/plugin/process/process.go b/x-pack/elastic-agent/pkg/core/plugin/process/process.go
index 4cb9f770231..81f1960bf8b 100644
--- a/x-pack/elastic-agent/pkg/core/plugin/process/process.go
+++ b/x-pack/elastic-agent/pkg/core/plugin/process/process.go
@@ -5,40 +5,14 @@
 package process
 
 import (
-	"crypto/rand"
-	"encoding/hex"
 	"fmt"
 	"io"
-	"math"
-	mrand "math/rand"
-	"net"
 	"os"
-	"path/filepath"
-	"runtime"
-	"time"
-
-	"gopkg.in/yaml.v2"
 
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/errors"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/logger"
 )
 
-const (
-	// DefaultTimeout is timeout for starting a process, needs to be passed as a config
-	DefaultTimeout = 10 * time.Second
-	// MinPortNumberKey is a minimum port new process can get for newly created GRPC server
-	MinPortNumberKey = "MIN_PORT_NUMBER"
-	// MaxPortNumberKey is a maximum port new process can get for newly created GRPC server
-	MaxPortNumberKey = "MAX_PORT_NUMBER"
-	// DefaultMinPort is used when no configuration is provided
-	DefaultMinPort = 10000
-	// DefaultMaxPort is used when no configuration is provided
-	DefaultMaxPort = 30000
-
-	transportUnix = "unix"
-	transportTCP  = "tcp"
-)
-
 var (
 	// ErrProcessStartFailedTimeout is a failure of start due to timeout
 	ErrProcessStartFailedTimeout = errors.New("process failed to start due to timeout")
@@ -46,16 +20,9 @@ var (
 
 // Info groups information about fresh new process
 type Info struct {
-	Address string
 	PID     int
 	Process *os.Process
-}
-
-// Creds contains information for securing a communication
-type Creds struct {
-	CaCert []byte
-	PK     []byte
-	Cert   []byte
+	Stdin   io.WriteCloser
 }
 
 // Start starts a new process
@@ -63,21 +30,8 @@ type Creds struct {
 // - network address of child process
 // - process id
 // - error
-func Start(logger *logger.Logger, path string, config *Config, uid, gid int, creds *Creds, arg ...string) (processInfo *Info, err error) {
-	// inject env
-	grpcAddress, err := getGrpcAddress(config)
-	if err != nil {
-		return nil, errors.New(err, "failed to acquire grpc address")
-	}
-
-	logger.Infof("address assigned to the process '%s': '%s'", path, grpcAddress)
-
-	env := []string{
-		fmt.Sprintf("SERVER_ADDRESS=%s", grpcAddress),
-	}
-
-	// create a command
-	cmd := getCmd(logger, path, env, uid, gid, arg...)
+func Start(logger *logger.Logger, path string, config *Config, uid, gid int, arg ...string) (proc *Info, err error) {
+	cmd := getCmd(logger, path, []string{}, uid, gid, arg...)
 	stdin, err := cmd.StdinPipe()
 	if err != nil {
 		return nil, err
@@ -88,120 +42,9 @@ func Start(logger *logger.Logger, path string, config *Config, uid, gid int, cre
 		return nil, errors.New(err, fmt.Sprintf("failed to start '%s'", path))
 	}
 
-	// push credentials
-	err = pushCredentials(stdin, creds)
-
 	return &Info{
 		PID:     cmd.Process.Pid,
 		Process: cmd.Process,
-		Address: grpcAddress,
+		Stdin:   stdin,
 	}, err
 }
-
-// Stop stops the process based on the process id
-func Stop(logger *logger.Logger, pid int) error {
-	proc, err := os.FindProcess(pid)
-	if err != nil {
-		// Process not found (it is already killed) we treat as a success
-		return nil
-	}
-
-	return proc.Signal(os.Interrupt)
-}
-
-// Attach assumes caller knows all the details about the process
-// so it just tries to attach to existing PID and returns Process
-// itself for awaiter
-func Attach(logger *logger.Logger, pid int) (*Info, error) {
-	proc, err := os.FindProcess(pid)
-	if err != nil {
-		// Process not found we are unable to attach
-		return nil, err
-	}
-
-	// We are attaching to an existing process,
-	// address is already known to caller
-	return &Info{
-		PID:     proc.Pid,
-		Process: proc,
-	}, nil
-}
-
-func getGrpcAddress(config *Config) (string, error) {
-	if config.Transport == transportUnix && runtime.GOOS != "windows" {
-		getGrpcUnixAddress()
-	}
-
-	return getGrpcTCPAddress(config.MinPortNumber, config.MaxPortNumber)
-}
-
-func getGrpcUnixAddress() (string, error) {
-	for i := 0; i <= 100; i++ {
-		name := randSocketName()
-		if fi, err := os.Stat(name); err != nil || fi == nil {
-			return name, nil
-		}
-	}
-
-	return "", fmt.Errorf("free unix socket not found, retry limit reached")
-}
-
-func getGrpcTCPAddress(minPort, maxPort int) (string, error) {
-	if minPort == 0 {
-		minPort = DefaultMinPort
-	}
-
-	if maxPort == 0 {
-		maxPort = DefaultMaxPort
-	}
-
-	jitter := (maxPort - minPort) / 3
-	if jitter > 0 {
-		mrand.Seed(time.Now().UnixNano())
-		minPort += mrand.Intn(jitter)
-	}
-
-	for port := minPort; port <= maxPort; port++ {
-		desiredAddress := fmt.Sprintf("127.0.0.1:%d", port)
-		listener, _ := net.Listen("tcp", desiredAddress)
-		if listener != nil {
-			// we found available port
-			listener.Close()
-			return desiredAddress, nil
-		}
-	}
-
-	return "", fmt.Errorf("port not found in range %d-%d", minPort, maxPort)
-}
-
-func randSocketName() string {
-	randBytes := make([]byte, 10)
-	rand.Read(randBytes)
-	return filepath.Join(os.TempDir(), hex.EncodeToString(randBytes)+".sock")
-}
-
-func isInt32(val int) bool {
-	return val >= 0 && val <= math.MaxInt32
-}
-
-func pushCredentials(w io.Writer, c *Creds) error {
-	if c == nil {
-		return nil
-	}
-
-	credbytes, err := yaml.Marshal(c)
-	if err != nil {
-		return errors.New(err, "decoding credentials")
-	}
-
-	_, err = w.Write(credbytes)
-	if err != nil {
-		return errors.New(err, "passing credentials failed")
-	}
-
-	// this gives beat with grpc a bit of time to spin up a goroutine and start a server.
-	// should be ok until we come up with more clever solution.
-	// Issue: https://github.com/elastic/beats/v7/issues/15634
-	<-time.After(1500 * time.Millisecond)
-	return nil
-}
diff --git a/x-pack/elastic-agent/pkg/core/plugin/server/server.go b/x-pack/elastic-agent/pkg/core/plugin/server/server.go
deleted file mode 100644
index 7f15c22198d..00000000000
--- a/x-pack/elastic-agent/pkg/core/plugin/server/server.go
+++ /dev/null
@@ -1,93 +0,0 @@
-// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
-// or more contributor license agreements. Licensed under the Elastic License;
-// you may not use this file except in compliance with the Elastic License.
-
-package server
-
-import (
-	"crypto/tls"
-	"crypto/x509"
-	"fmt"
-	"io"
-	"io/ioutil"
-	"net"
-	"os"
-
-	rpc "google.golang.org/grpc"
-	"google.golang.org/grpc/credentials"
-	"gopkg.in/yaml.v2"
-
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/errors"
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/process"
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/remoteconfig/grpc"
-)
-
-const (
-	serverAddressKey = "SERVER_ADDRESS"
-)
-
-// NewGrpcServer creates a server and pairs it with fleet.
-// Reads secrets from provided reader, registers provided server
-// and starts listening on negotiated address
-func NewGrpcServer(secretsReader io.Reader, configServer grpc.ConfiguratorServer) error {
-	// get creds from agent
-	var cred *process.Creds
-	secrets, err := ioutil.ReadAll(secretsReader)
-	if err != nil {
-		return errors.New(err, "failed to retrieve secrets from provided input")
-	}
-
-	err = yaml.Unmarshal(secrets, &cred)
-	if err != nil {
-		return errors.New(err, "failed to parse secrets from provided input")
-	}
-
-	// setup grpc server
-	serverAddress, found := os.LookupEnv(serverAddressKey)
-	if !found {
-		return errors.New("server address not specified")
-	}
-
-	pair, err := tls.X509KeyPair(cred.Cert, cred.PK)
-	if err != nil {
-		return errors.New(err, "failed to load x509 key-pair")
-	}
-
-	// Create CA cert pool
-	certPool := x509.NewCertPool()
-	if ok := certPool.AppendCertsFromPEM(cred.CaCert); !ok {
-		errors.New("failed to append client certs")
-	}
-
-	fmt.Printf("Listening at %s\n", serverAddress)
-	lis, err := net.Listen("tcp", serverAddress)
-	if err != nil {
-		return errors.New(err,
-			fmt.Sprintf("failed to start server: %v", serverAddress),
-			errors.TypeNetwork,
-			errors.M(errors.MetaKeyURI, serverAddress))
-	}
-
-	// Create the TLS credentials
-	serverCreds := credentials.NewTLS(&tls.Config{
-		ClientAuth:   tls.RequireAndVerifyClientCert,
-		Certificates: []tls.Certificate{pair},
-		ClientCAs:    certPool,
-	})
-
-	// Create the gRPC server with the credentials
-	srv := rpc.NewServer(rpc.Creds(serverCreds))
-
-	// Register the handler object
-	grpc.RegisterConfiguratorServer(srv, configServer)
-
-	// Serve and Listen
-	if err := srv.Serve(lis); err != nil {
-		return errors.New(err,
-			fmt.Sprintf("grpc serve error: %s", serverAddress),
-			errors.TypeNetwork,
-			errors.M(errors.MetaKeyURI, serverAddress))
-	}
-
-	return nil
-}
diff --git a/x-pack/elastic-agent/pkg/core/plugin/state/state.go b/x-pack/elastic-agent/pkg/core/plugin/state/state.go
index 0c6b35dbc91..a3a4419e6fb 100644
--- a/x-pack/elastic-agent/pkg/core/plugin/state/state.go
+++ b/x-pack/elastic-agent/pkg/core/plugin/state/state.go
@@ -4,7 +4,10 @@
 
 package state
 
-import "github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/process"
+import (
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/process"
+	"github.com/elastic/elastic-agent-client/v7/pkg/proto"
+)
 
 // Status describes the current status of the application process.
 type Status int
@@ -12,9 +15,21 @@ type Status int
 const (
 	// Stopped is status describing not running application.
 	Stopped Status = iota
-	// Running signals that application is currently running.
+	// Starting is status describing application is starting.
+	Starting
+	// Configuring is status describing application is configuring.
+	Configuring
+	// Running is status describing application is running.
 	Running
-	// Restarting means process crashed and is being started again.
+	// Degraded is status describing application is degraded.
+	Degraded
+	// Failed is status describing application is failed.
+	Failed
+	// Stopping is status describing application is stopping.
+	Stopping
+	// Crashed is status describing application is crashed.
+	Crashed
+	// Restarting is status describing application is restarting.
 	Restarting
 )
 
@@ -22,4 +37,23 @@ const (
 type State struct {
 	ProcessInfo *process.Info
 	Status      Status
+	Message     string
+}
+
+// UpdateFromProto updates the status from the status from the GRPC protocol.
+func (s *State) UpdateFromProto(status proto.StateObserved_Status) {
+	switch status {
+	case proto.StateObserved_STARTING:
+		s.Status = Starting
+	case proto.StateObserved_CONFIGURING:
+		s.Status = Configuring
+	case proto.StateObserved_HEALTHY:
+		s.Status = Running
+	case proto.StateObserved_DEGRADED:
+		s.Status = Degraded
+	case proto.StateObserved_FAILED:
+		s.Status = Failed
+	case proto.StateObserved_STOPPING:
+		s.Status = Stopping
+	}
 }
diff --git a/x-pack/elastic-agent/pkg/core/remoteconfig/config.go b/x-pack/elastic-agent/pkg/core/remoteconfig/config.go
deleted file mode 100644
index 5e9b879d299..00000000000
--- a/x-pack/elastic-agent/pkg/core/remoteconfig/config.go
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
-// or more contributor license agreements. Licensed under the Elastic License;
-// you may not use this file except in compliance with the Elastic License.
-
-package remoteconfig
-
-import (
-	"context"
-)
-
-// Client for remote calls
-type Client interface{}
-
-// ConfiguratorClient is the client connecting agent and a process
-type ConfiguratorClient interface {
-	Config(ctx context.Context, config string) error
-	Close() error
-}
-
-// ConnectionCreator describes a creator of connections.
-// ConnectionCreator should be used in client vault to generate new connections.
-type ConnectionCreator interface {
-	NewConnection(address ConnectionProvider) (Client, error)
-}
-
-// ConnectionProvider is a basic provider everybody needs to implement
-// in order to provide a valid connection.
-// Minimal set of properties is: address
-type ConnectionProvider interface {
-	Address() string
-}
diff --git a/x-pack/elastic-agent/pkg/core/remoteconfig/grpc/configclient.go b/x-pack/elastic-agent/pkg/core/remoteconfig/grpc/configclient.go
deleted file mode 100644
index 1ca7ba6b33e..00000000000
--- a/x-pack/elastic-agent/pkg/core/remoteconfig/grpc/configclient.go
+++ /dev/null
@@ -1,93 +0,0 @@
-// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
-// or more contributor license agreements. Licensed under the Elastic License;
-// you may not use this file except in compliance with the Elastic License.
-
-package grpc
-
-import (
-	context "context"
-	"errors"
-	"time"
-
-	grpc "google.golang.org/grpc"
-	rpc "google.golang.org/grpc"
-
-	"github.com/elastic/beats/v7/libbeat/common/backoff"
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/remoteconfig"
-)
-
-var (
-	// ErrNotGrpcClient is used when connection passed into a factory is not a grpc connection
-	ErrNotGrpcClient = errors.New("not a grpc client")
-	// ErrProviderNotProvided is used when provider passed into factory is not provided
-	ErrProviderNotProvided = errors.New("provider not provided")
-	// ErrProviderIncorrectType is used when provider passed into factory does not implement grpcConnectionProvided
-	ErrProviderIncorrectType = errors.New("provided provider has incorrect type")
-)
-
-// CreateConfiguratorClient creates a new client from a connection passed in.
-// This wraps generated grpc implementation so the change of the underlying
-// technology is just the change of the namespace.
-func CreateConfiguratorClient(conn interface{}, delay, maxDelay time.Duration) (remoteconfig.ConfiguratorClient, error) {
-	grpcConn, ok := conn.(*rpc.ClientConn)
-	if !ok {
-		return nil, ErrNotGrpcClient
-	}
-
-	var boff backoff.Backoff
-	done := make(chan struct{})
-
-	if delay > 0 && maxDelay > 0 {
-		boff = backoff.NewEqualJitterBackoff(done, delay, maxDelay)
-	} else {
-		// no retry strategy configured
-		boff = NewNoopBackoff()
-	}
-
-	return &client{
-		grpcConn: grpcConn,
-		client:   NewConfiguratorClient(grpcConn),
-		backoff:  boff,
-		done:     done,
-	}, nil
-}
-
-type client struct {
-	grpcConn *grpc.ClientConn
-	client   ConfiguratorClient
-	backoff  backoff.Backoff
-	done     chan struct{}
-}
-
-// Config performs grpc Config request.
-func (c *client) Config(ctx context.Context, config string) error {
-	request := ConfigRequest{
-		Config: string(config),
-	}
-
-	_, err := c.client.Config(ctx, &request)
-	backoff.WaitOnError(c.backoff, err)
-
-	return err
-}
-
-// Status performs grpc Status request.
-func (c *client) Status(ctx context.Context) (string, error) {
-	request := StatusRequest{}
-	res, err := c.client.Status(ctx, &request)
-	if err != nil {
-		return "", err
-	}
-
-	return res.Status, nil
-}
-
-// Close cleans up resources.
-func (c *client) Close() error {
-	close(c.done)
-	return c.grpcConn.Close()
-}
-
-func (c *client) Backoff() backoff.Backoff {
-	return c.backoff
-}
diff --git a/x-pack/elastic-agent/pkg/core/remoteconfig/grpc/connection_provider.go b/x-pack/elastic-agent/pkg/core/remoteconfig/grpc/connection_provider.go
deleted file mode 100644
index f6bc612507d..00000000000
--- a/x-pack/elastic-agent/pkg/core/remoteconfig/grpc/connection_provider.go
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
-// or more contributor license agreements. Licensed under the Elastic License;
-// you may not use this file except in compliance with the Elastic License.
-
-package grpc
-
-import (
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/remoteconfig"
-)
-
-var _ remoteconfig.ConnectionProvider = (*ConnectionProvider)(nil)
-var _ grpcConnectionProvider = (*ConnectionProvider)(nil)
-
-// ConnectionProvider is a connection provider for grpc connections
-type ConnectionProvider struct {
-	address          string
-	caCrt            []byte
-	clientPrivateKey []byte
-	clientCert       []byte
-}
-
-type grpcConnectionProvider interface {
-	remoteconfig.ConnectionProvider
-	CA() []byte
-	Cert() []byte
-	PK() []byte
-	IsSecured() bool
-}
-
-// NewConnectionProvider creates a new connection provider for grpc connections
-func NewConnectionProvider(address string, caCrt []byte, clientPrivateKey, clientCert []byte) *ConnectionProvider {
-	return &ConnectionProvider{
-		address:          address,
-		caCrt:            caCrt,
-		clientPrivateKey: clientPrivateKey,
-		clientCert:       clientCert,
-	}
-}
-
-// Address returns an address used for connecting to a client
-func (c *ConnectionProvider) Address() string { return c.address }
-
-// CA returns a certificate authority associated with a connection
-func (c *ConnectionProvider) CA() []byte { return c.caCrt }
-
-// Cert returns a public certificate associated with a connection
-func (c *ConnectionProvider) Cert() []byte { return c.clientCert }
-
-// PK returns a private key associated with a connection
-func (c *ConnectionProvider) PK() []byte { return c.clientPrivateKey }
-
-// IsSecured returns true if all bits for setting up a secure connection were provided
-func (c *ConnectionProvider) IsSecured() bool {
-	return c.caCrt != nil && c.clientCert != nil && c.clientPrivateKey != nil
-}
diff --git a/x-pack/elastic-agent/pkg/core/remoteconfig/grpc/factory.go b/x-pack/elastic-agent/pkg/core/remoteconfig/grpc/factory.go
deleted file mode 100644
index 62ddb418be9..00000000000
--- a/x-pack/elastic-agent/pkg/core/remoteconfig/grpc/factory.go
+++ /dev/null
@@ -1,79 +0,0 @@
-// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
-// or more contributor license agreements. Licensed under the Elastic License;
-// you may not use this file except in compliance with the Elastic License.
-
-package grpc
-
-import (
-	"crypto/tls"
-	"crypto/x509"
-	"time"
-
-	"google.golang.org/grpc/credentials"
-
-	rpc "google.golang.org/grpc"
-
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/errors"
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/remoteconfig"
-)
-
-// NewConnFactory creates a factory used to create connection. Hides implementation details
-// of the underlying connections.
-func NewConnFactory(backoffDelay, backoffMaxDelay time.Duration) remoteconfig.ConnectionCreator {
-	return &connectionFactory{
-		backoffDelay:    backoffDelay,
-		backoffMaxDelay: backoffMaxDelay,
-	}
-}
-
-type connectionFactory struct {
-	backoffDelay    time.Duration
-	backoffMaxDelay time.Duration
-}
-
-// NewConnection creates a connection
-func (c *connectionFactory) NewConnection(provider remoteconfig.ConnectionProvider) (remoteconfig.Client, error) {
-	if provider == nil {
-		return nil, ErrProviderNotProvided
-	}
-
-	grpcProvider, ok := provider.(grpcConnectionProvider)
-	if !ok {
-		return nil, ErrProviderIncorrectType
-	}
-
-	if !grpcProvider.IsSecured() {
-		conn, err := rpc.Dial(provider.Address(), rpc.WithInsecure())
-		if err != nil {
-			return nil, err
-		}
-
-		return CreateConfiguratorClient(conn, c.backoffDelay, c.backoffMaxDelay)
-	}
-
-	// Load client certificate
-	pair, err := tls.X509KeyPair(grpcProvider.Cert(), grpcProvider.PK())
-	if err != nil {
-		return nil, errors.New(err, "creating client certificate pair")
-	}
-
-	// Load Cert Auth
-	certPool := x509.NewCertPool()
-	if ok := certPool.AppendCertsFromPEM(grpcProvider.CA()); !ok {
-		return nil, errors.New("failed to append client certificate to CA pool")
-	}
-
-	// Construct credentials
-	creds := credentials.NewTLS(&tls.Config{
-		RootCAs:      certPool,
-		Certificates: []tls.Certificate{pair},
-		ServerName:   "localhost",
-	})
-
-	conn, err := rpc.Dial(provider.Address(), rpc.WithTransportCredentials(creds))
-	if err != nil {
-		return nil, err
-	}
-
-	return CreateConfiguratorClient(conn, c.backoffDelay, c.backoffMaxDelay)
-}
diff --git a/x-pack/elastic-agent/pkg/core/remoteconfig/grpc/noop_backoff.go b/x-pack/elastic-agent/pkg/core/remoteconfig/grpc/noop_backoff.go
deleted file mode 100644
index 6599d106734..00000000000
--- a/x-pack/elastic-agent/pkg/core/remoteconfig/grpc/noop_backoff.go
+++ /dev/null
@@ -1,26 +0,0 @@
-// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
-// or more contributor license agreements. Licensed under the Elastic License;
-// you may not use this file except in compliance with the Elastic License.
-
-package grpc
-
-import (
-	"github.com/elastic/beats/v7/libbeat/common/backoff"
-)
-
-// NoopBackoff implements a backoff interface without any wait.
-// Used when no backoff is configured.
-type NoopBackoff struct{}
-
-// NewNoopBackoff returns a new EqualJitter object.
-func NewNoopBackoff() backoff.Backoff {
-	return &NoopBackoff{}
-}
-
-// Reset resets the duration of the backoff.
-func (b *NoopBackoff) Reset() {}
-
-// Wait block until either the timer is completed or channel is done.
-func (b *NoopBackoff) Wait() bool {
-	return true
-}
diff --git a/x-pack/elastic-agent/pkg/core/remoteconfig/grpc/remote_config.pb.go b/x-pack/elastic-agent/pkg/core/remoteconfig/grpc/remote_config.pb.go
deleted file mode 100644
index 4048c8a0ee1..00000000000
--- a/x-pack/elastic-agent/pkg/core/remoteconfig/grpc/remote_config.pb.go
+++ /dev/null
@@ -1,310 +0,0 @@
-// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
-// or more contributor license agreements. Licensed under the Elastic License;
-// you may not use this file except in compliance with the Elastic License.
-
-// Code generated by protoc-gen-go. DO NOT EDIT.
-// source: remote_config.proto
-
-package grpc
-
-import (
-	context "context"
-	fmt "fmt"
-	math "math"
-
-	proto "github.com/golang/protobuf/proto"
-	grpc "google.golang.org/grpc"
-	codes "google.golang.org/grpc/codes"
-	status "google.golang.org/grpc/status"
-)
-
-// Reference imports to suppress errors if they are not otherwise used.
-var _ = proto.Marshal
-var _ = fmt.Errorf
-var _ = math.Inf
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
-
-type ConfigRequest struct {
-	Config               string   `protobuf:"bytes,1,opt,name=config,proto3" json:"config,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *ConfigRequest) Reset()         { *m = ConfigRequest{} }
-func (m *ConfigRequest) String() string { return proto.CompactTextString(m) }
-func (*ConfigRequest) ProtoMessage()    {}
-func (*ConfigRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_16fc0d99571fe457, []int{0}
-}
-
-func (m *ConfigRequest) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_ConfigRequest.Unmarshal(m, b)
-}
-func (m *ConfigRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_ConfigRequest.Marshal(b, m, deterministic)
-}
-func (m *ConfigRequest) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_ConfigRequest.Merge(m, src)
-}
-func (m *ConfigRequest) XXX_Size() int {
-	return xxx_messageInfo_ConfigRequest.Size(m)
-}
-func (m *ConfigRequest) XXX_DiscardUnknown() {
-	xxx_messageInfo_ConfigRequest.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_ConfigRequest proto.InternalMessageInfo
-
-func (m *ConfigRequest) GetConfig() string {
-	if m != nil {
-		return m.Config
-	}
-	return ""
-}
-
-type ConfigResponse struct {
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *ConfigResponse) Reset()         { *m = ConfigResponse{} }
-func (m *ConfigResponse) String() string { return proto.CompactTextString(m) }
-func (*ConfigResponse) ProtoMessage()    {}
-func (*ConfigResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_16fc0d99571fe457, []int{1}
-}
-
-func (m *ConfigResponse) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_ConfigResponse.Unmarshal(m, b)
-}
-func (m *ConfigResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_ConfigResponse.Marshal(b, m, deterministic)
-}
-func (m *ConfigResponse) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_ConfigResponse.Merge(m, src)
-}
-func (m *ConfigResponse) XXX_Size() int {
-	return xxx_messageInfo_ConfigResponse.Size(m)
-}
-func (m *ConfigResponse) XXX_DiscardUnknown() {
-	xxx_messageInfo_ConfigResponse.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_ConfigResponse proto.InternalMessageInfo
-
-type StatusRequest struct {
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *StatusRequest) Reset()         { *m = StatusRequest{} }
-func (m *StatusRequest) String() string { return proto.CompactTextString(m) }
-func (*StatusRequest) ProtoMessage()    {}
-func (*StatusRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_16fc0d99571fe457, []int{2}
-}
-
-func (m *StatusRequest) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_StatusRequest.Unmarshal(m, b)
-}
-func (m *StatusRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_StatusRequest.Marshal(b, m, deterministic)
-}
-func (m *StatusRequest) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_StatusRequest.Merge(m, src)
-}
-func (m *StatusRequest) XXX_Size() int {
-	return xxx_messageInfo_StatusRequest.Size(m)
-}
-func (m *StatusRequest) XXX_DiscardUnknown() {
-	xxx_messageInfo_StatusRequest.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_StatusRequest proto.InternalMessageInfo
-
-type StatusResponse struct {
-	Status               string   `protobuf:"bytes,1,opt,name=Status,proto3" json:"Status,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *StatusResponse) Reset()         { *m = StatusResponse{} }
-func (m *StatusResponse) String() string { return proto.CompactTextString(m) }
-func (*StatusResponse) ProtoMessage()    {}
-func (*StatusResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_16fc0d99571fe457, []int{3}
-}
-
-func (m *StatusResponse) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_StatusResponse.Unmarshal(m, b)
-}
-func (m *StatusResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_StatusResponse.Marshal(b, m, deterministic)
-}
-func (m *StatusResponse) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_StatusResponse.Merge(m, src)
-}
-func (m *StatusResponse) XXX_Size() int {
-	return xxx_messageInfo_StatusResponse.Size(m)
-}
-func (m *StatusResponse) XXX_DiscardUnknown() {
-	xxx_messageInfo_StatusResponse.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_StatusResponse proto.InternalMessageInfo
-
-func (m *StatusResponse) GetStatus() string {
-	if m != nil {
-		return m.Status
-	}
-	return ""
-}
-
-func init() {
-	proto.RegisterType((*ConfigRequest)(nil), "remoteconfig.ConfigRequest")
-	proto.RegisterType((*ConfigResponse)(nil), "remoteconfig.ConfigResponse")
-	proto.RegisterType((*StatusRequest)(nil), "remoteconfig.StatusRequest")
-	proto.RegisterType((*StatusResponse)(nil), "remoteconfig.StatusResponse")
-}
-
-func init() { proto.RegisterFile("remote_config.proto", fileDescriptor_16fc0d99571fe457) }
-
-var fileDescriptor_16fc0d99571fe457 = []byte{
-	// 175 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x12, 0x2e, 0x4a, 0xcd, 0xcd,
-	0x2f, 0x49, 0x8d, 0x4f, 0xce, 0xcf, 0x4b, 0xcb, 0x4c, 0xd7, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17,
-	0xe2, 0x81, 0x08, 0x42, 0xc4, 0x94, 0xd4, 0xb9, 0x78, 0x9d, 0xc1, 0xac, 0xa0, 0xd4, 0xc2, 0xd2,
-	0xd4, 0xe2, 0x12, 0x21, 0x31, 0x2e, 0x36, 0x88, 0x94, 0x04, 0xa3, 0x02, 0xa3, 0x06, 0x67, 0x10,
-	0x94, 0xa7, 0x24, 0xc0, 0xc5, 0x07, 0x53, 0x58, 0x5c, 0x90, 0x9f, 0x57, 0x9c, 0xaa, 0xc4, 0xcf,
-	0xc5, 0x1b, 0x5c, 0x92, 0x58, 0x52, 0x5a, 0x0c, 0xd5, 0xaa, 0xa4, 0xc1, 0xc5, 0x07, 0x13, 0x80,
-	0x28, 0x01, 0x19, 0x06, 0x11, 0x81, 0x19, 0x06, 0xe1, 0x19, 0xcd, 0x61, 0xe4, 0xe2, 0x81, 0x98,
-	0x56, 0x5a, 0x94, 0x58, 0x92, 0x5f, 0x24, 0xe4, 0xca, 0xc5, 0x06, 0xe1, 0x0b, 0x49, 0xeb, 0x21,
-	0xbb, 0x4f, 0x0f, 0xc5, 0x71, 0x52, 0x32, 0xd8, 0x25, 0xa1, 0x0e, 0x62, 0x00, 0x19, 0x03, 0xb1,
-	0x01, 0xdd, 0x18, 0x14, 0x87, 0xa2, 0x1b, 0x83, 0xea, 0x68, 0x25, 0x86, 0x24, 0x36, 0x70, 0x48,
-	0x19, 0x03, 0x02, 0x00, 0x00, 0xff, 0xff, 0x06, 0x93, 0xe1, 0x10, 0x40, 0x01, 0x00, 0x00,
-}
-
-// Reference imports to suppress errors if they are not otherwise used.
-var _ context.Context
-var _ grpc.ClientConn
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion4
-
-// ConfiguratorClient is the client API for Configurator service.
-//
-// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
-type ConfiguratorClient interface {
-	Config(ctx context.Context, in *ConfigRequest, opts ...grpc.CallOption) (*ConfigResponse, error)
-	Status(ctx context.Context, in *StatusRequest, opts ...grpc.CallOption) (*StatusResponse, error)
-}
-
-type configuratorClient struct {
-	cc *grpc.ClientConn
-}
-
-func NewConfiguratorClient(cc *grpc.ClientConn) ConfiguratorClient {
-	return &configuratorClient{cc}
-}
-
-func (c *configuratorClient) Config(ctx context.Context, in *ConfigRequest, opts ...grpc.CallOption) (*ConfigResponse, error) {
-	out := new(ConfigResponse)
-	err := c.cc.Invoke(ctx, "/remoteconfig.Configurator/Config", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
-func (c *configuratorClient) Status(ctx context.Context, in *StatusRequest, opts ...grpc.CallOption) (*StatusResponse, error) {
-	out := new(StatusResponse)
-	err := c.cc.Invoke(ctx, "/remoteconfig.Configurator/Status", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
-// ConfiguratorServer is the server API for Configurator service.
-type ConfiguratorServer interface {
-	Config(context.Context, *ConfigRequest) (*ConfigResponse, error)
-	Status(context.Context, *StatusRequest) (*StatusResponse, error)
-}
-
-// UnimplementedConfiguratorServer can be embedded to have forward compatible implementations.
-type UnimplementedConfiguratorServer struct {
-}
-
-func (*UnimplementedConfiguratorServer) Config(ctx context.Context, req *ConfigRequest) (*ConfigResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method Config not implemented")
-}
-func (*UnimplementedConfiguratorServer) Status(ctx context.Context, req *StatusRequest) (*StatusResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method Status not implemented")
-}
-
-func RegisterConfiguratorServer(s *grpc.Server, srv ConfiguratorServer) {
-	s.RegisterService(&_Configurator_serviceDesc, srv)
-}
-
-func _Configurator_Config_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(ConfigRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(ConfiguratorServer).Config(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/remoteconfig.Configurator/Config",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(ConfiguratorServer).Config(ctx, req.(*ConfigRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _Configurator_Status_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(StatusRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(ConfiguratorServer).Status(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/remoteconfig.Configurator/Status",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(ConfiguratorServer).Status(ctx, req.(*StatusRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-var _Configurator_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "remoteconfig.Configurator",
-	HandlerType: (*ConfiguratorServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "Config",
-			Handler:    _Configurator_Config_Handler,
-		},
-		{
-			MethodName: "Status",
-			Handler:    _Configurator_Status_Handler,
-		},
-	},
-	Streams:  []grpc.StreamDesc{},
-	Metadata: "remote_config.proto",
-}
diff --git a/x-pack/elastic-agent/pkg/core/server/config.go b/x-pack/elastic-agent/pkg/core/server/config.go
new file mode 100644
index 00000000000..46253431a45
--- /dev/null
+++ b/x-pack/elastic-agent/pkg/core/server/config.go
@@ -0,0 +1,41 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
+package server
+
+import (
+	"fmt"
+
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/config"
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/logger"
+)
+
+// Config is a configuration of GRPC server.
+type Config struct {
+	Address string `config:"address"`
+	Port    uint16 `config:"port"`
+}
+
+// DefaultGRPCConfig creates a default server configuration.
+func DefaultGRPCConfig() *Config {
+	return &Config{
+		Address: "localhost",
+		Port:    6789,
+	}
+}
+
+// NewFromConfig creates a new GRPC server for clients to connect to.
+func NewFromConfig(logger *logger.Logger, cfg *config.Config, handler Handler) (*Server, error) {
+	wrappedConfig := &struct {
+		GRPC *Config `config:"grpc"`
+	}{
+		GRPC: DefaultGRPCConfig(),
+	}
+
+	if err := cfg.Unpack(&wrappedConfig); err != nil {
+		return nil, err
+	}
+
+	return New(logger, fmt.Sprintf("%s:%d", wrappedConfig.GRPC.Address, wrappedConfig.GRPC.Port), handler)
+}
diff --git a/x-pack/elastic-agent/pkg/core/server/config_test.go b/x-pack/elastic-agent/pkg/core/server/config_test.go
new file mode 100644
index 00000000000..9f659319cc8
--- /dev/null
+++ b/x-pack/elastic-agent/pkg/core/server/config_test.go
@@ -0,0 +1,27 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
+package server
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/config"
+)
+
+func TestNewFromConfig(t *testing.T) {
+	cfg := config.MustNewConfigFrom(map[string]interface{}{
+		"grpc": map[string]interface{}{
+			"address": "0.0.0.0",
+			"port":    9876,
+		},
+	})
+	l := newErrorLogger(t)
+	srv, err := NewFromConfig(l, cfg, &StubHandler{})
+	require.NoError(t, err)
+	assert.Equal(t, "0.0.0.0:9876", srv.getListenAddr())
+}
diff --git a/x-pack/elastic-agent/pkg/core/server/server.go b/x-pack/elastic-agent/pkg/core/server/server.go
index 498b1b8b161..38db57234b6 100644
--- a/x-pack/elastic-agent/pkg/core/server/server.go
+++ b/x-pack/elastic-agent/pkg/core/server/server.go
@@ -93,7 +93,6 @@ type Handler interface {
 
 // Server is the GRPC server that the launched applications connect back to.
 type Server struct {
-	lock       sync.RWMutex
 	logger     *logger.Logger
 	ca         *authority.CertificateAuthority
 	listenAddr string
@@ -104,7 +103,7 @@ type Server struct {
 	watchdogDone chan bool
 	watchdogWG   sync.WaitGroup
 
-	apps map[string]*ApplicationState
+	apps sync.Map
 
 	// overridden in tests
 	watchdogCheckInterval time.Duration
@@ -122,7 +121,6 @@ func New(logger *logger.Logger, listenAddr string, handler Handler) (*Server, er
 		ca:                    ca,
 		listenAddr:            listenAddr,
 		handler:               handler,
-		apps:                  make(map[string]*ApplicationState),
 		watchdogCheckInterval: WatchdogCheckLoop,
 		checkInMinTimeout:     client.CheckinMinimumTimeout + CheckinMinimumTimeoutGracePeriod,
 	}, nil
@@ -176,14 +174,16 @@ func (s *Server) Stop() {
 
 // Get returns the application state from the server for the passed application.
 func (s *Server) Get(app interface{}) (*ApplicationState, bool) {
-	s.lock.RLock()
-	defer s.lock.RUnlock()
-	for _, appState := range s.apps {
-		if appState.app == app {
-			return appState, true
+	var foundState *ApplicationState
+	s.apps.Range(func(_ interface{}, val interface{}) bool {
+		as := val.(*ApplicationState)
+		if as.app == app {
+			foundState = as
+			return false
 		}
-	}
-	return nil, false
+		return true
+	})
+	return foundState, foundState != nil
 }
 
 // Register registers a new application to connect to the server.
@@ -222,9 +222,7 @@ func (s *Server) Register(app interface{}, config string) (*ApplicationState, er
 		sentActions:       make(map[string]*sentAction),
 		actionsConn:       true,
 	}
-	s.lock.Lock()
-	defer s.lock.Unlock()
-	s.apps[appState.token] = appState
+	s.apps.Store(appState.token, appState)
 	return appState, nil
 }
 
@@ -559,9 +557,7 @@ func (as *ApplicationState) Stop(timeout time.Duration) error {
 func (as *ApplicationState) Destroy() {
 	as.destroyActionsStream()
 	as.destroyCheckinStream()
-	as.srv.lock.Lock()
-	delete(as.srv.apps, as.token)
-	as.srv.lock.Unlock()
+	as.srv.apps.Delete(as.token)
 }
 
 // UpdateConfig pushes an updated configuration to the connected application.
@@ -625,6 +621,49 @@ func (as *ApplicationState) PerformAction(name string, params map[string]interfa
 	return res.result, res.err
 }
 
+// App returns the registered app for the state.
+func (as *ApplicationState) App() interface{} {
+	return as.app
+}
+
+// Expected returns the expected state of the process.
+func (as *ApplicationState) Expected() proto.StateExpected_State {
+	as.checkinLock.RLock()
+	defer as.checkinLock.RUnlock()
+	return as.expected
+}
+
+// Config returns the expected config of the process.
+func (as *ApplicationState) Config() string {
+	as.checkinLock.RLock()
+	defer as.checkinLock.RUnlock()
+	return as.expectedConfig
+}
+
+// Status returns the current observed status.
+func (as *ApplicationState) Status() (proto.StateObserved_Status, string) {
+	as.checkinLock.RLock()
+	defer as.checkinLock.RUnlock()
+	return as.status, as.statusMessage
+}
+
+// SetStatus allows the status to be overwritten by the agent.
+//
+// This status will be overwritten by the client if it reconnects and updates it status.
+func (as *ApplicationState) SetStatus(status proto.StateObserved_Status, msg string) {
+	as.checkinLock.RLock()
+	prevStatus := as.status
+	prevMessage := as.statusMessage
+	as.status = status
+	as.statusMessage = msg
+	as.checkinLock.RUnlock()
+
+	// alert the service handler that status has changed for the application
+	if prevStatus != status || prevMessage != msg {
+		as.srv.handler.OnStatusChange(as, status, msg)
+	}
+}
+
 // updateStatus updates the current observed status from the application, sends the expected state back to the
 // application if the server expects it to be different then its observed state, and alerts the handler on the
 // server when the application status has changed.
@@ -767,9 +806,9 @@ func (s *Server) watchdog() {
 		case <-time.After(s.watchdogCheckInterval):
 		}
 
-		s.lock.RLock()
 		now := time.Now().UTC()
-		for _, serverApp := range s.apps {
+		s.apps.Range(func(_ interface{}, val interface{}) bool {
+			serverApp := val.(*ApplicationState)
 			serverApp.checkinLock.RLock()
 			statusTime := serverApp.statusTime
 			serverApp.checkinLock.RUnlock()
@@ -798,27 +837,33 @@ func (s *Server) watchdog() {
 				}
 			}
 			serverApp.flushExpiredActions()
-		}
-		s.lock.RUnlock()
+			return true
+		})
 	}
 }
 
 // getByToken returns an application state by its token.
 func (s *Server) getByToken(token string) (*ApplicationState, bool) {
-	s.lock.RLock()
-	defer s.lock.RUnlock()
-	a, ok := s.apps[token]
-	return a, ok
+	val, ok := s.apps.Load(token)
+	if ok {
+		return val.(*ApplicationState), true
+	}
+	return nil, false
 }
 
 // getCertificate returns the TLS certificate based on the clientHello or errors if not found.
 func (s *Server) getCertificate(chi *tls.ClientHelloInfo) (*tls.Certificate, error) {
-	s.lock.RLock()
-	defer s.lock.RUnlock()
-	for _, app := range s.apps {
-		if app.srvName == chi.ServerName {
-			return app.cert.Certificate, nil
+	var cert *tls.Certificate
+	s.apps.Range(func(_ interface{}, val interface{}) bool {
+		sa := val.(*ApplicationState)
+		if sa.srvName == chi.ServerName {
+			cert = sa.cert.Certificate
+			return false
 		}
+		return true
+	})
+	if cert != nil {
+		return cert, nil
 	}
 	return nil, errors.New("no supported TLS certificate", errors.TypeSecurity)
 }
diff --git a/x-pack/elastic-agent/proto/remote_config.proto b/x-pack/elastic-agent/proto/remote_config.proto
deleted file mode 100644
index 7b151a9205f..00000000000
--- a/x-pack/elastic-agent/proto/remote_config.proto
+++ /dev/null
@@ -1,22 +0,0 @@
-
-syntax = "proto3";
-package remoteconfig;
-
-message ConfigRequest {
-    string config = 1;
-}
-
-message ConfigResponse {
-}
-
-message StatusRequest{
-}
-
-message StatusResponse {
-    string Status = 1;
-}
-
-service Configurator {
-    rpc Config(ConfigRequest) returns (ConfigResponse) {}
-    rpc Status(StatusRequest) returns (StatusResponse) {}
-}
diff --git a/x-pack/libbeat/management/fleet/config_server.go b/x-pack/libbeat/management/fleet/config_server.go
deleted file mode 100644
index 5a74d50c981..00000000000
--- a/x-pack/libbeat/management/fleet/config_server.go
+++ /dev/null
@@ -1,61 +0,0 @@
-// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
-// or more contributor license agreements. Licensed under the Elastic License;
-// you may not use this file except in compliance with the Elastic License.
-
-package fleet
-
-import (
-	"context"
-	"errors"
-	"fmt"
-	"time"
-
-	"github.com/elastic/beats/v7/libbeat/common"
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/remoteconfig/grpc"
-)
-
-const (
-	defaultTimeout = 15 * time.Second
-)
-
-// Server is a server for handling communication between
-// beat and Elastic Agent.
-type Server struct {
-	configChan chan<- map[string]interface{}
-}
-
-// NewConfigServer creates a new grpc configuration server for receiving
-// configurations from Elastic Agent.
-func NewConfigServer(configChan chan<- map[string]interface{}) *Server {
-	return &Server{
-		configChan: configChan,
-	}
-}
-
-// Config is a handler of a call made by agent pushing latest configuration.
-func (s *Server) Config(ctx context.Context, req *grpc.ConfigRequest) (*grpc.ConfigResponse, error) {
-	cfgString := req.GetConfig()
-
-	var configMap common.MapStr
-	uconfig, err := common.NewConfigFrom(cfgString)
-	if err != nil {
-		return &grpc.ConfigResponse{}, fmt.Errorf("config blocks unsuccessfully generated: %+v", err)
-	}
-
-	err = uconfig.Unpack(&configMap)
-	if err != nil {
-		return &grpc.ConfigResponse{}, fmt.Errorf("config blocks unsuccessfully generated: %+v", err)
-	}
-
-	select {
-	case s.configChan <- configMap:
-	case <-time.After(defaultTimeout):
-		return &grpc.ConfigResponse{}, errors.New("failed to push configuration: Timeout")
-	}
-	return &grpc.ConfigResponse{}, nil
-}
-
-// Status returns OK.
-func (s *Server) Status(ctx context.Context, req *grpc.StatusRequest) (*grpc.StatusResponse, error) {
-	return &grpc.StatusResponse{Status: "ok"}, nil
-}
diff --git a/x-pack/libbeat/management/fleet/manager.go b/x-pack/libbeat/management/fleet/manager.go
index 483b697eda3..55903480f06 100644
--- a/x-pack/libbeat/management/fleet/manager.go
+++ b/x-pack/libbeat/management/fleet/manager.go
@@ -5,43 +5,38 @@
 package fleet
 
 import (
+	"context"
 	"fmt"
 	"os"
 	"sort"
-	"sync"
 
 	"github.com/gofrs/uuid"
 	"github.com/pkg/errors"
 
+	"github.com/elastic/elastic-agent-client/v7/pkg/client"
+	"github.com/elastic/elastic-agent-client/v7/pkg/proto"
+
 	"github.com/elastic/beats/v7/libbeat/common"
 	"github.com/elastic/beats/v7/libbeat/common/cfgwarn"
 	"github.com/elastic/beats/v7/libbeat/common/reload"
 	"github.com/elastic/beats/v7/libbeat/logp"
 	"github.com/elastic/beats/v7/libbeat/management"
-	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/core/plugin/server"
 	"github.com/elastic/beats/v7/x-pack/libbeat/management/api"
 
 	xmanagement "github.com/elastic/beats/v7/x-pack/libbeat/management"
 )
 
-// ConfigManager provides a functionality to retrieve config channel
-// using which manager is informed about config changes.
-type ConfigManager interface {
-	ConfigChan() chan<- map[string]interface{}
-}
-
 // Manager handles internal config updates. By retrieving
 // new configs from Kibana and applying them to the Beat.
 type Manager struct {
 	config    *Config
 	logger    *logp.Logger
 	beatUUID  uuid.UUID
-	done      chan struct{}
 	registry  *reload.Registry
-	wg        sync.WaitGroup
 	blacklist *xmanagement.ConfigBlacklist
+	client    *client.Client
 
-	configChan chan map[string]interface{}
+	stopFunc func()
 }
 
 // NewFleetManager returns a X-Pack Beats Fleet Management manager.
@@ -57,32 +52,34 @@ func NewFleetManager(config *common.Config, registry *reload.Registry, beatUUID
 
 // NewFleetManagerWithConfig returns a X-Pack Beats Fleet Management manager.
 func NewFleetManagerWithConfig(c *Config, registry *reload.Registry, beatUUID uuid.UUID) (management.ConfigManager, error) {
-	var blacklist *xmanagement.ConfigBlacklist
+	log := logp.NewLogger(management.DebugK)
 
-	if c.Enabled && c.Mode == xmanagement.ModeFleet {
-		var err error
+	m := &Manager{
+		config:   c,
+		logger:   log.Named("fleet"),
+		beatUUID: beatUUID,
+		registry: registry,
+	}
 
+	var err error
+	var blacklist *xmanagement.ConfigBlacklist
+	var eac *client.Client
+	if c.Enabled && c.Mode == xmanagement.ModeFleet {
 		// Initialize configs blacklist
 		blacklist, err = xmanagement.NewConfigBlacklist(c.Blacklist)
 		if err != nil {
 			return nil, errors.Wrap(err, "wrong settings for configurations blacklist")
 		}
-	}
-
-	log := logp.NewLogger(management.DebugK)
 
-	m := &Manager{
-		config:     c,
-		blacklist:  blacklist,
-		logger:     log.Named("fleet"),
-		done:       make(chan struct{}),
-		beatUUID:   beatUUID,
-		registry:   registry,
-		configChan: make(chan map[string]interface{}),
+		// Initialize the client
+		eac, err = client.NewFromReader(os.Stdin, m)
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to create elastic-agent-client")
+		}
 	}
 
-	go m.startGrpcServer()
-
+	m.blacklist = blacklist
+	m.client = eac
 	return m, nil
 }
 
@@ -91,13 +88,8 @@ func (cm *Manager) Enabled() bool {
 	return cm.config.Enabled && cm.config.Mode == xmanagement.ModeFleet
 }
 
-// ConfigChan returns a channel used to communicate configuration changes.
-func (cm *Manager) ConfigChan() chan<- map[string]interface{} {
-	return cm.configChan
-}
-
 // Start the config manager
-func (cm *Manager) Start() {
+func (cm *Manager) Start(stopFunc func()) {
 	if !cm.Enabled() {
 		return
 	}
@@ -105,8 +97,11 @@ func (cm *Manager) Start() {
 	cfgwarn.Beta("Fleet management is enabled")
 	cm.logger.Info("Starting fleet management service")
 
-	cm.wg.Add(1)
-	go cm.worker()
+	cm.stopFunc = stopFunc
+	err := cm.client.Start(context.Background())
+	if err != nil {
+		cm.logger.Errorf("failed to start elastic-agent-client: %s", err)
+	}
 }
 
 // Stop the config manager
@@ -115,10 +110,8 @@ func (cm *Manager) Stop() {
 		return
 	}
 
-	// stop collecting configuration
 	cm.logger.Info("Stopping fleet management service")
-	close(cm.done)
-	cm.wg.Wait()
+	cm.client.Stop()
 }
 
 // CheckRawConfig check settings are correct to start the beat. This method
@@ -129,30 +122,55 @@ func (cm *Manager) CheckRawConfig(cfg *common.Config) error {
 	return nil
 }
 
-func (cm *Manager) worker() {
-	defer cm.wg.Done()
+func (cm *Manager) OnConfig(s string) {
+	cm.client.Status(proto.StateObserved_CONFIGURING, "Updating configuration")
 
-	// Start worker loop: fetch + apply  new settings
-WORKERLOOP:
-	for {
-		select {
-		case cfg := <-cm.configChan:
-			blocks, err := cm.toConfigBlocks(cfg)
-			if err != nil {
-				cm.logger.Errorf("Could not apply the configuration, error: %+v", err)
-				continue WORKERLOOP
-			}
+	var configMap common.MapStr
+	uconfig, err := common.NewConfigFrom(s)
+	if err != nil {
+		err = errors.Wrap(err, "config blocks unsuccessfully generated")
+		cm.logger.Error(err)
+		cm.client.Status(proto.StateObserved_FAILED, err.Error())
+		return
+	}
 
-			if errs := cm.apply(blocks); !errs.IsEmpty() {
-				cm.logger.Errorf("Could not apply the configuration, error: %+v", errs)
-				continue WORKERLOOP
-			}
-		case <-cm.done:
-			return
-		}
+	err = uconfig.Unpack(&configMap)
+	if err != nil {
+		err = errors.Wrap(err, "config blocks unsuccessfully generated")
+		cm.logger.Error(err)
+		cm.client.Status(proto.StateObserved_FAILED, err.Error())
+		return
+	}
+
+	blocks, err := cm.toConfigBlocks(configMap)
+	if err != nil {
+		err = errors.Wrap(err, "could not apply the configuration")
+		cm.logger.Error(err)
+		cm.client.Status(proto.StateObserved_FAILED, err.Error())
+		return
+	}
+
+	if errs := cm.apply(blocks); !errs.IsEmpty() {
+		err = errors.Wrap(err, "could not apply the configuration")
+		cm.logger.Error(err)
+		cm.client.Status(proto.StateObserved_FAILED, err.Error())
+		return
+	}
+
+	cm.client.Status(proto.StateObserved_HEALTHY, "Running")
+}
+
+func (cm *Manager) OnStop() {
+	if cm.stopFunc != nil {
+		cm.client.Status(proto.StateObserved_STOPPING, "Stopping")
+		cm.stopFunc()
 	}
 }
 
+func (cm *Manager) OnError(err error) {
+	cm.logger.Errorf("elastic-agent-client got error: %s", err)
+}
+
 func (cm *Manager) apply(blocks api.ConfigBlocks) xmanagement.Errors {
 	var errors xmanagement.Errors
 	missing := map[string]bool{}
@@ -267,13 +285,3 @@ func (cm *Manager) toConfigBlocks(cfg common.MapStr) (api.ConfigBlocks, error) {
 
 	return res, nil
 }
-
-func (cm *Manager) startGrpcServer() {
-	cm.logger.Info("initiating fleet config manager")
-	s := NewConfigServer(cm.ConfigChan())
-	if err := server.NewGrpcServer(os.Stdin, s); err != nil {
-		panic(err)
-	}
-}
-
-var _ ConfigManager = &Manager{}
diff --git a/x-pack/libbeat/management/manager.go b/x-pack/libbeat/management/manager.go
index 74770ef424a..b6b75b373ac 100644
--- a/x-pack/libbeat/management/manager.go
+++ b/x-pack/libbeat/management/manager.go
@@ -116,7 +116,7 @@ func (cm *ConfigManager) Enabled() bool {
 }
 
 // Start the config manager
-func (cm *ConfigManager) Start() {
+func (cm *ConfigManager) Start(_ func()) {
 	if !cm.Enabled() {
 		return
 	}
diff --git a/x-pack/libbeat/management/manager_test.go b/x-pack/libbeat/management/manager_test.go
index af0c8816ebe..c783989b708 100644
--- a/x-pack/libbeat/management/manager_test.go
+++ b/x-pack/libbeat/management/manager_test.go
@@ -88,7 +88,7 @@ func TestConfigManager(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	manager.Start()
+	manager.Start(func() {})
 
 	// On first reload we will get apache2 module
 	config1 := <-reloadable.reloaded
@@ -164,7 +164,7 @@ func TestRemoveItems(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	manager.Start()
+	manager.Start(func() {})
 
 	// On first reload we will get apache2 module
 	config1 := <-reloadable.reloaded
@@ -242,7 +242,7 @@ func TestUnEnroll(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	manager.Start()
+	manager.Start(func() {})
 
 	// On first reload we will get apache2 module
 	config1 := <-reloadable.reloaded
@@ -322,7 +322,7 @@ func TestBadConfig(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	manager.Start()
+	manager.Start(func() {})
 
 	// On first reload we will get apache2 module
 	config1 := <-reloadable.reloaded