[extension/opamp] Add os.description as non-identifying agent attribute (#35816)

**Description:** <Describe what has changed.>
<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->

The opamp extension now reports additional information about the host
machine's operating system, specifically the version. It does so by
reporting the semantic convention `os.description`(defined
[here](https://opentelemetry.io/docs/specs/semconv/attributes-registry/os/))
as a non-identifying attribute in the agent description message.

**Link to tracking Issue:** <Issue number if applicable> Closes #35555

**Testing:** <Describe what testing was performed and which tests were
added.> Unit tests updated.
Verified `os.description` attribute shows up with values like 'macOS
15.0' and 'Ubuntu 20.04.6 LTS'

Author: dpaasman00

.chloggen/opampextension-add-os-desc-semconv.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: opampextension
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Report OS description semantic convention (`os.description`) as a part of non-identifying agent description.
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [35555]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

cmd/opampsupervisor/e2e_test.go

@@ -752,7 +752,8 @@ func TestSupervisorAgentDescriptionConfigApplies(t *testing.T) {
 		},
 	}
 
-	require.Equal(t, expectedDescription, ad.AgentDescription)
+	require.Subset(t, ad.AgentDescription.IdentifyingAttributes, expectedDescription.IdentifyingAttributes)
+	require.Subset(t, ad.AgentDescription.NonIdentifyingAttributes, expectedDescription.NonIdentifyingAttributes)
 
 	time.Sleep(250 * time.Millisecond)
 }

extension/opampextension/go.mod

@@ -60,7 +60,7 @@ require (
 	go.uber.org/multierr v1.11.0 // indirect
 	golang.org/x/net v0.28.0 // indirect
 	golang.org/x/sys v0.25.0 // indirect
-	golang.org/x/text v0.17.0 // indirect
+	golang.org/x/text v0.17.0
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20240814211410-ddb44dafa142 // indirect
 	google.golang.org/protobuf v1.35.1 // indirect
 )

extension/opampextension/opamp_agent.go

@@ -19,6 +19,7 @@ import (
 	"github.com/open-telemetry/opamp-go/client"
 	"github.com/open-telemetry/opamp-go/client/types"
 	"github.com/open-telemetry/opamp-go/protobufs"
+	"github.com/shirou/gopsutil/v4/host"
 	"go.opentelemetry.io/collector/component"
 	"go.opentelemetry.io/collector/component/componentstatus"
 	"go.opentelemetry.io/collector/confmap"
@@ -27,6 +28,8 @@ import (
 	semconv "go.opentelemetry.io/collector/semconv/v1.27.0"
 	"go.uber.org/zap"
 	"golang.org/x/exp/maps"
+	"golang.org/x/text/cases"
+	"golang.org/x/text/language"
 	"gopkg.in/yaml.v3"
 
 	"github.com/open-telemetry/opentelemetry-collector-contrib/extension/opampcustommessages"
@@ -278,6 +281,7 @@ func (o *opampAgent) createAgentDescription() error {
 	if err != nil {
 		return err
 	}
+	description := getOSDescription(o.logger)
 
 	ident := []*protobufs.KeyValue{
 		stringKeyValue(semconv.AttributeServiceInstanceID, o.instanceID.String()),
@@ -291,6 +295,7 @@ func (o *opampAgent) createAgentDescription() error {
 	nonIdentifyingAttributeMap[semconv.AttributeOSType] = runtime.GOOS
 	nonIdentifyingAttributeMap[semconv.AttributeHostArch] = runtime.GOARCH
 	nonIdentifyingAttributeMap[semconv.AttributeHostName] = hostname
+	nonIdentifyingAttributeMap[semconv.AttributeOSDescription] = description
 
 	for k, v := range o.cfg.AgentDescription.NonIdentifyingAttributes {
 		nonIdentifyingAttributeMap[k] = v
@@ -367,3 +372,21 @@ func (o *opampAgent) setHealth(ch *protobufs.ComponentHealth) {
 		}
 	}
 }
+
+func getOSDescription(logger *zap.Logger) string {
+	info, err := host.Info()
+	if err != nil {
+		logger.Error("failed getting host info", zap.Error(err))
+		return runtime.GOOS
+	}
+	switch runtime.GOOS {
+	case "darwin":
+		return "macOS " + info.PlatformVersion
+	case "linux":
+		return cases.Title(language.English).String(info.Platform) + " " + info.PlatformVersion
+	case "windows":
+		return info.Platform + " " + info.PlatformVersion
+	default:
+		return runtime.GOOS
+	}
+}

extension/opampextension/opamp_agent_test.go

@@ -19,6 +19,7 @@ import (
 	"go.opentelemetry.io/collector/confmap/confmaptest"
 	"go.opentelemetry.io/collector/extension/extensiontest"
 	semconv "go.opentelemetry.io/collector/semconv/v1.27.0"
+	"go.uber.org/zap"
 )
 
 func TestNewOpampAgent(t *testing.T) {
@@ -53,6 +54,7 @@ func TestNewOpampAgentAttributes(t *testing.T) {
 func TestCreateAgentDescription(t *testing.T) {
 	hostname, err := os.Hostname()
 	require.NoError(t, err)
+	description := getOSDescription(zap.NewNop())
 
 	serviceName := "otelcol-distrot"
 	serviceVersion := "distro.0"
@@ -76,6 +78,7 @@ func TestCreateAgentDescription(t *testing.T) {
 				NonIdentifyingAttributes: []*protobufs.KeyValue{
 					stringKeyValue(semconv.AttributeHostArch, runtime.GOARCH),
 					stringKeyValue(semconv.AttributeHostName, hostname),
+					stringKeyValue(semconv.AttributeOSDescription, description),
 					stringKeyValue(semconv.AttributeOSType, runtime.GOOS),
 				},
 			},
@@ -99,6 +102,7 @@ func TestCreateAgentDescription(t *testing.T) {
 					stringKeyValue(semconv.AttributeHostArch, runtime.GOARCH),
 					stringKeyValue(semconv.AttributeHostName, hostname),
 					stringKeyValue(semconv.AttributeK8SPodName, "my-very-cool-pod"),
+					stringKeyValue(semconv.AttributeOSDescription, description),
 					stringKeyValue(semconv.AttributeOSType, runtime.GOOS),
 				},
 			},
@@ -119,6 +123,7 @@ func TestCreateAgentDescription(t *testing.T) {
 				NonIdentifyingAttributes: []*protobufs.KeyValue{
 					stringKeyValue(semconv.AttributeHostArch, runtime.GOARCH),
 					stringKeyValue(semconv.AttributeHostName, "override-host"),
+					stringKeyValue(semconv.AttributeOSDescription, description),
 					stringKeyValue(semconv.AttributeOSType, runtime.GOOS),
 				},
 			},