fix supervisor test

cmd/opampsupervisor/e2e_test.go

@@ -691,6 +691,8 @@ func TestSupervisorAgentDescriptionConfigApplies(t *testing.T) {
 	host, err := os.Hostname()
 	require.NoError(t, err)
 
+	description := getOSDescription(t)
+
 	// Get the binary name and version from the Collector binary
 	// using the `components` command that prints a YAML-encoded
 	// map of information about the Collector build. Some of this
@@ -748,6 +750,7 @@ func TestSupervisorAgentDescriptionConfigApplies(t *testing.T) {
 			stringKeyValue("env", "prod"),
 			stringKeyValue(semconv.AttributeHostArch, runtime.GOARCH),
 			stringKeyValue(semconv.AttributeHostName, host),
+			stringKeyValue(semconv.AttributeOSDescription, description),
 			stringKeyValue(semconv.AttributeOSType, runtime.GOOS),
 		},
 	}
@@ -1459,3 +1462,38 @@ func findRandomPort() (int, error) {
 
 	return port, nil
 }
+
+func getOSDescription(t *testing.T) string {
+	switch runtime.GOOS {
+	case "linux":
+		output, err := exec.Command("lsb_release", "-a").Output()
+		require.NoError(t, err)
+		for _, line := range strings.Split(string(output), "\n") {
+			if raw, ok := strings.CutPrefix(line, "Description:"); ok {
+				return strings.TrimSpace(raw)
+			}
+		}
+	case "darwin":
+		output, err := exec.Command("sw_vers").Output()
+		require.NoError(t, err)
+		var productName string
+		var productVersion string
+		for _, line := range strings.Split(string(output), "\n") {
+			if raw, ok := strings.CutPrefix(line, "ProductName:"); ok {
+				productName = strings.TrimSpace(raw)
+			} else if raw, ok = strings.CutPrefix(line, "ProductVersion:"); ok {
+				productVersion = strings.TrimSpace(raw)
+			}
+		}
+		if productName != "" && productVersion != "" {
+			return productName + " " + productVersion
+		}
+	case "windows":
+		output, err := exec.Command("cmd", "/c", "ver").Output()
+		require.NoError(t, err)
+		if string(output) != "" {
+			return strings.TrimSpace(string(output))
+		}
+	}
+	return ""
+}