use faas.instance instead of faas.id in gcp detector (#4198)

* use faas.instance instead of faas.id in gcp detector

* Update CHANGELOG.md

Co-authored-by: Robert Pająk <pellared@hotmail.com>

---------

Co-authored-by: Robert Pająk <pellared@hotmail.com>
Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>

Author: 3 people

CHANGELOG.md

@@ -38,6 +38,10 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 - Change interceptors in `go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc` to disable `SENT`/`RECEIVED` events.
   Use `WithMessageEvents()` to turn back on. (#3964)
 
+### Changed
+
+- `go.opentelemetry.io/contrib/detectors/gcp`: Detect `faas.instance` instead of `faas.id`, since `faas.id` is being removed. (#4198)
+
 ### Fixed
 
 - AWS XRay Remote Sampling to cap `quotaBalance` to 1x quota in `go.opentelemetry.io/contrib/samplers/aws/xray`. (#3651, #3652)

detectors/gcp/detector.go

@@ -60,27 +60,27 @@ func (d *detector) Detect(ctx context.Context) (*resource.Resource, error) {
 		b.attrs = append(b.attrs, semconv.CloudPlatformGCPCloudRun)
 		b.add(semconv.FaaSNameKey, d.detector.FaaSName)
 		b.add(semconv.FaaSVersionKey, d.detector.FaaSVersion)
-		b.add(semconv.FaaSIDKey, d.detector.FaaSID)
+		b.add(semconv.FaaSInstanceKey, d.detector.FaaSID)
 		b.add(semconv.CloudRegionKey, d.detector.FaaSCloudRegion)
 	case gcp.CloudFunctions:
 		b.attrs = append(b.attrs, semconv.CloudPlatformGCPCloudFunctions)
 		b.add(semconv.FaaSNameKey, d.detector.FaaSName)
 		b.add(semconv.FaaSVersionKey, d.detector.FaaSVersion)
-		b.add(semconv.FaaSIDKey, d.detector.FaaSID)
+		b.add(semconv.FaaSInstanceKey, d.detector.FaaSID)
 		b.add(semconv.CloudRegionKey, d.detector.FaaSCloudRegion)
 	case gcp.AppEngineFlex:
 		b.attrs = append(b.attrs, semconv.CloudPlatformGCPAppEngine)
 		b.addZoneAndRegion(d.detector.AppEngineFlexAvailabilityZoneAndRegion)
 		b.add(semconv.FaaSNameKey, d.detector.AppEngineServiceName)
 		b.add(semconv.FaaSVersionKey, d.detector.AppEngineServiceVersion)
-		b.add(semconv.FaaSIDKey, d.detector.AppEngineServiceInstance)
+		b.add(semconv.FaaSInstanceKey, d.detector.AppEngineServiceInstance)
 	case gcp.AppEngineStandard:
 		b.attrs = append(b.attrs, semconv.CloudPlatformGCPAppEngine)
 		b.add(semconv.CloudAvailabilityZoneKey, d.detector.AppEngineStandardAvailabilityZone)
 		b.add(semconv.CloudRegionKey, d.detector.AppEngineStandardCloudRegion)
 		b.add(semconv.FaaSNameKey, d.detector.AppEngineServiceName)
 		b.add(semconv.FaaSVersionKey, d.detector.AppEngineServiceVersion)
-		b.add(semconv.FaaSIDKey, d.detector.AppEngineServiceInstance)
+		b.add(semconv.FaaSInstanceKey, d.detector.AppEngineServiceInstance)
 	case gcp.GCE:
 		b.attrs = append(b.attrs, semconv.CloudPlatformGCPComputeEngine)
 		b.addZoneAndRegion(d.detector.GCEAvailabilityZoneAndRegion)

detectors/gcp/detector_test.go

@@ -113,7 +113,7 @@ func TestDetect(t *testing.T) {
 				semconv.CloudRegion("us-central1"),
 				semconv.FaaSName("my-service"),
 				semconv.FaaSVersion("123456"),
-				semconv.FaaSID("1472385723456792345"),
+				semconv.FaaSInstance("1472385723456792345"),
 			),
 		},
 		{
@@ -133,7 +133,7 @@ func TestDetect(t *testing.T) {
 				semconv.CloudRegion("us-central1"),
 				semconv.FaaSName("my-service"),
 				semconv.FaaSVersion("123456"),
-				semconv.FaaSID("1472385723456792345"),
+				semconv.FaaSInstance("1472385723456792345"),
 			),
 		},
 		{
@@ -155,7 +155,7 @@ func TestDetect(t *testing.T) {
 				semconv.CloudAvailabilityZone("us-central1-c"),
 				semconv.FaaSName("my-service"),
 				semconv.FaaSVersion("123456"),
-				semconv.FaaSID("1472385723456792345"),
+				semconv.FaaSInstance("1472385723456792345"),
 			),
 		},
 		{
@@ -177,7 +177,7 @@ func TestDetect(t *testing.T) {
 				semconv.CloudAvailabilityZone("us-central1-c"),
 				semconv.FaaSName("my-service"),
 				semconv.FaaSVersion("123456"),
-				semconv.FaaSID("1472385723456792345"),
+				semconv.FaaSInstance("1472385723456792345"),
 			),
 		},
 		{