[OTEL-2125] Add E2E test for no dd exporter case

comp/otelcol/ddflareextension/impl/server.go

@@ -111,7 +111,6 @@ func newServer(endpoint string, handler http.Handler) (*server, error) {
 
 	r := mux.NewRouter()
 	r.Handle("/", handler)
-
 	r.Use(validateToken)
 
 	s := &http.Server{

test/new-e2e/tests/otel/otel-agent/config/no-dd-exporter.yml

@@ -0,0 +1,23 @@
+receivers:
+  otlp:
+    protocols:
+      grpc:
+        endpoint: 0.0.0.0:4317
+      http:
+        endpoint: 0.0.0.0:4318
+
+exporters:
+  debug:
+    verbosity: detailed
+
+service:
+  pipelines:
+    metrics:
+      receivers: [otlp]
+      exporters: [debug]
+    traces:
+      receivers: [otlp]
+      exporters: [debug]
+    logs:
+      receivers: [otlp]
+      exporters: [debug]

test/new-e2e/tests/otel/otel-agent/minimal_test.go

@@ -32,8 +32,8 @@ var minimalProvidedConfig string
 //go:embed testdata/minimal-full-config.yml
 var minimalFullConfig string
 
-//go:embed testdata/minimal-sources.json
-var minimalSources string
+//go:embed testdata/sources.json
+var sources string
 
 func TestOTelAgentMinimal(t *testing.T) {
 	values := `
@@ -82,5 +82,5 @@ func (s *minimalTestSuite) TestOTelAgentInstalled() {
 }
 
 func (s *minimalTestSuite) TestOTelFlare() {
-	utils.TestOTelFlare(s, minimalProvidedConfig, minimalFullConfig, minimalSources)
+	utils.TestOTelFlare(s, minimalProvidedConfig, minimalFullConfig, sources)
 }

test/new-e2e/tests/otel/otel-agent/no_dd_exporter_test.go

@@ -0,0 +1,59 @@
+// Unless explicitly stated otherwise all files in this repository are licensed
+// under the Apache License Version 2.0.
+// This product includes software developed at Datadog (https://www.datadoghq.com/).
+// Copyright 2016-present Datadog, Inc.
+
+// Package otelagent contains e2e otel agent tests
+package otelagent
+
+import (
+	_ "embed"
+	"testing"
+
+	"github.com/DataDog/test-infra-definitions/components/datadog/kubernetesagentparams"
+
+	"github.com/DataDog/datadog-agent/test/new-e2e/pkg/e2e"
+	"github.com/DataDog/datadog-agent/test/new-e2e/pkg/environments"
+	awskubernetes "github.com/DataDog/datadog-agent/test/new-e2e/pkg/environments/aws/kubernetes"
+	"github.com/DataDog/datadog-agent/test/new-e2e/tests/otel/utils"
+)
+
+type noDDExporterTestSuite struct {
+	e2e.BaseSuite[environments.Kubernetes]
+}
+
+//go:embed config/no-dd-exporter.yml
+var noDDExporterConfig string
+
+//go:embed testdata/no-dd-exporter-provided-config.yml
+var noDDExporterProvidedConfig string
+
+//go:embed testdata/no-dd-exporter-full-config.yml
+var noDDExporterFullConfig string
+
+func TestOTelAgentWithNoDDExporter(t *testing.T) {
+	values := `
+datadog:
+  logs:
+    containerCollectAll: false
+    containerCollectUsingFiles: false
+`
+	t.Parallel()
+	e2e.Run(t, &noDDExporterTestSuite{},
+		e2e.WithProvisioner(
+			awskubernetes.KindProvisioner(
+				awskubernetes.WithAgentOptions(
+					kubernetesagentparams.WithoutDualShipping(),
+					kubernetesagentparams.WithHelmValues(values),
+					kubernetesagentparams.WithOTelAgent(),
+					kubernetesagentparams.WithOTelConfig(noDDExporterConfig),
+				))))
+}
+
+func (s *noDDExporterTestSuite) TestOTelAgentInstalled() {
+	utils.TestOTelAgentInstalled(s)
+}
+
+func (s *noDDExporterTestSuite) TestFlare() {
+	utils.TestOTelFlare(s, noDDExporterProvidedConfig, noDDExporterFullConfig, sources)
+}

test/new-e2e/tests/otel/otel-agent/testdata/no-dd-exporter-full-config.yml

@@ -0,0 +1,93 @@
+connectors: {}
+exporters:
+  debug:
+    sampling_initial: 2
+    sampling_thereafter: 1
+    use_internal_logger: true
+    verbosity: Detailed
+extensions:
+  ddflare/dd-autoconfigured:
+    auth: null
+    compression_algorithms: []
+    cors: null
+    endpoint: localhost:7777
+    include_metadata: false
+    max_request_body_size: 0
+    response_headers: {}
+    tls: null
+  health_check/dd-autoconfigured:
+    auth: null
+    check_collector_pipeline:
+      enabled: false
+      exporter_failure_threshold: 5
+      interval: 5m
+    compression_algorithms: []
+    cors: null
+    endpoint: localhost:13133
+    include_metadata: false
+    max_request_body_size: 0
+    path: /
+    response_body: null
+    response_headers: {}
+    tls: null
+  pprof/dd-autoconfigured:
+    block_profile_fraction: 0
+    dialer:
+      timeout: 0s
+    endpoint: localhost:1777
+    mutex_profile_fraction: 0
+    save_to_file: ""
+  zpages/dd-autoconfigured:
+    auth: null
+    compression_algorithms: []
+    cors: null
+    endpoint: localhost:55679
+    include_metadata: false
+    max_request_body_size: 0
+    response_headers: {}
+    tls: null
+processors: {}
+receivers:
+  hostmetrics:
+    collection_interval: 1m0s
+    initial_delay: 1s
+    root_path: ""
+    timeout: 0s
+service:
+  extensions:
+  - pprof/dd-autoconfigured
+  - zpages/dd-autoconfigured
+  - health_check/dd-autoconfigured
+  - ddflare/dd-autoconfigured
+  pipelines:
+    metrics/sys:
+      exporters:
+      - debug
+      processors: []
+      receivers:
+      - hostmetrics
+  telemetry:
+    logs:
+      development: false
+      disable_caller: false
+      disable_stacktrace: false
+      encoding: console
+      error_output_paths:
+      - stderr
+      initial_fields: {}
+      level: info
+      output_paths:
+      - stderr
+      sampling:
+        enabled: true
+        initial: 10
+        thereafter: 100
+        tick: 10s
+    metrics:
+      address: :8888
+      level: Normal
+      readers: []
+    resource: {}
+    traces:
+      processors: []
+      propagators: []

test/new-e2e/tests/otel/otel-agent/testdata/no-dd-exporter-provided-config.yml

@@ -0,0 +1,49 @@
+connectors: {}
+exporters:
+  debug:
+    sampling_initial: 2
+    sampling_thereafter: 1
+    use_internal_logger: true
+    verbosity: Detailed
+extensions: {}
+processors: {}
+receivers:
+  hostmetrics:
+    collection_interval: 1m0s
+    initial_delay: 1s
+    root_path: ""
+    timeout: 0s
+service:
+  extensions: []
+  pipelines:
+    metrics/sys:
+      exporters:
+      - debug
+      processors: []
+      receivers:
+      - hostmetrics
+  telemetry:
+    logs:
+      development: false
+      disable_caller: false
+      disable_stacktrace: false
+      encoding: console
+      error_output_paths:
+      - stderr
+      initial_fields: {}
+      level: info
+      output_paths:
+      - stderr
+      sampling:
+        enabled: true
+        initial: 10
+        thereafter: 100
+        tick: 10s
+    metrics:
+      address: :8888
+      level: Normal
+      readers: []
+    resource: {}
+    traces:
+      processors: []
+      propagators: []

test/new-e2e/tests/otel/utils/config_utils.go

@@ -141,13 +141,15 @@ func validateConfigs(t *testing.T, expectedCfg string, actualCfg string) {
 	// Traces, metrics and logs endpoints are set dynamically to the fake intake address in the config
 	// These endpoints vary from test to test and should be ignored in the comparison
 	exps, _ := actualConfRaw["exporters"].(map[string]any)
-	ddExp, _ := exps["datadog"].(map[string]any)
-	tcfg := ddExp["traces"].(map[string]any)
-	delete(tcfg, "endpoint")
-	mcfg := ddExp["metrics"].(map[string]any)
-	delete(mcfg, "endpoint")
-	lcfg := ddExp["logs"].(map[string]any)
-	delete(lcfg, "endpoint")
+	if ddExp, ok := exps["datadog"]; ok {
+		ddExpCfg := ddExp.(map[string]any)
+		tcfg := ddExpCfg["traces"].(map[string]any)
+		delete(tcfg, "endpoint")
+		mcfg := ddExpCfg["metrics"].(map[string]any)
+		delete(mcfg, "endpoint")
+		lcfg := ddExpCfg["logs"].(map[string]any)
+		delete(lcfg, "endpoint")
+	}
 
 	actualCfgBytes, err := yaml.Marshal(actualConfRaw)
 	require.NoError(t, err)