Fix container paths config (#2340)

* Fix config struct tags for containerPaths

* Add unit test

* Adding CHANGELOG file

* Adding PR to CHANGELOG entry file

* Running mage fmt

(cherry picked from commit d7adf66)

changelog/fragments/1677780422-fix-container-paths-config-parsing.yaml

@@ -0,0 +1,32 @@
+# Kind can be one of:
+# - breaking-change: a change to previously-documented behavior
+# - deprecation: functionality that is being removed in a later release
+# - bug-fix: fixes a problem in a previous version
+# - enhancement: extends functionality but does not break or fix existing behavior
+# - feature: new functionality
+# - known-issue: problems that we are aware of in a given version
+# - security: impacts on the security of a product or a user’s deployment.
+# - upgrade: important information for someone upgrading from a prior version
+# - other: does not fit into any of the other categories
+kind: bug-fix
+
+# Change summary; a 80ish characters long description of the change.
+summary: Fix parsing of paths from container-paths.yml file
+
+# Long description; in case the summary is not enough to describe the change
+# this field accommodate a description without length limits.
+# NOTE: This field will be rendered only for breaking-change and known-issue kinds at the moment.
+#description:
+
+# Affected component; a word indicating the component this changeset affects.
+component: agent
+
+# PR URL; optional; the PR number that added the changeset.
+# If not present is automatically filled by the tooling finding the PR where this changelog fragment has been added.
+# NOTE: the tooling supports backports, so it's able to fill the original PR number instead of the backport PR number.
+# Please provide it if you are adding a fragment for a different PR.
+pr: https://github.com/elastic/elastic-agent/pull/2340
+
+# Issue URL; optional; the GitHub issue related to this changeset (either closes or is part of).
+# If not present is automatically filled by the tooling with the issue linked to the PR number.
+#issue: https://github.com/owner/repo/1234

internal/pkg/agent/cmd/container.go

@@ -819,8 +819,8 @@ func setPaths(statePath, configPath, logsPath string, writePaths bool) error {
 
 type containerPaths struct {
 	StatePath  string `config:"state_path" yaml:"state_path"`
-	ConfigPath string `config:"state_path" yaml:"config_path,omitempty"`
-	LogsPath   string `config:"state_path" yaml:"logs_path,omitempty"`
+	ConfigPath string `config:"config_path" yaml:"config_path,omitempty"`
+	LogsPath   string `config:"logs_path" yaml:"logs_path,omitempty"`
 }
 
 func writeContainerPaths(original, statePath, configPath, logsPath string) error {

internal/pkg/agent/cmd/container_test.go

@@ -0,0 +1,58 @@
+// 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 cmd
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/elastic/elastic-agent/internal/pkg/config"
+)
+
+func TestContainerTestPaths(t *testing.T) {
+	cases := map[string]struct {
+		config   string
+		expected containerPaths
+	}{
+		"only_state_path": {
+			config: `state_path: /foo/bar/state`,
+			expected: containerPaths{
+				StatePath:  "/foo/bar/state",
+				ConfigPath: "",
+				LogsPath:   "",
+			},
+		},
+		"only_config_path": {
+			config: `config_path: /foo/bar/config`,
+			expected: containerPaths{
+				StatePath:  "",
+				ConfigPath: "/foo/bar/config",
+				LogsPath:   "",
+			},
+		},
+		"only_logs_path": {
+			config: `logs_path: /foo/bar/logs`,
+			expected: containerPaths{
+				StatePath:  "",
+				ConfigPath: "",
+				LogsPath:   "/foo/bar/logs",
+			},
+		},
+	}
+
+	for name, c := range cases {
+		t.Run(name, func(t *testing.T) {
+			cfg, err := config.NewConfigFrom(c.config)
+			require.NoError(t, err)
+
+			var paths containerPaths
+			err = cfg.Unpack(&paths)
+			require.NoError(t, err)
+
+			require.Equal(t, c.expected, paths)
+		})
+	}
+}