Remove support for legacy GKE monitoring resource model (#289)

Details: https://cloud.google.com/stackdriver/docs/deprecations/legacy

monitoredresource/deprecated_test.go

@@ -29,7 +29,7 @@ const (
 	GKEClusterNameStr   = "cluster"
 )
 
-func TestGKEContainerMonitoredResources(t *testing.T) {
+func TestGKEContainerMonitoredResourcesV2(t *testing.T) {
 	os.Setenv("KUBERNETES_SERVICE_HOST", "127.0.0.1")
 	autoDetected := GKEContainer{
 		InstanceID:    GCPInstanceIDStr,
@@ -41,32 +41,6 @@ func TestGKEContainerMonitoredResources(t *testing.T) {
 		PodID:         GKEPodIDStr,
 	}
 
-	resType, labels := autoDetected.MonitoredResource()
-	if resType != "gke_container" ||
-		labels["instance_id"] != GCPInstanceIDStr ||
-		labels["project_id"] != GCPProjectIDStr ||
-		labels["cluster_name"] != GKEClusterNameStr ||
-		labels["container_name"] != GKEContainerNameStr ||
-		labels["zone"] != GCPZoneStr ||
-		labels["namespace_id"] != GKENamespaceStr ||
-		labels["pod_id"] != GKEPodIDStr {
-		t.Errorf("GKEContainerMonitoredResource Failed: %v", autoDetected)
-	}
-}
-
-func TestGKEContainerMonitoredResourcesV2(t *testing.T) {
-	os.Setenv("KUBERNETES_SERVICE_HOST", "127.0.0.1")
-	autoDetected := GKEContainer{
-		InstanceID:                 GCPInstanceIDStr,
-		ProjectID:                  GCPProjectIDStr,
-		Zone:                       GCPZoneStr,
-		ClusterName:                GKEClusterNameStr,
-		ContainerName:              GKEContainerNameStr,
-		NamespaceID:                GKENamespaceStr,
-		PodID:                      GKEPodIDStr,
-		LoggingMonitoringV2Enabled: true,
-	}
-
 	resType, labels := autoDetected.MonitoredResource()
 	if resType != "k8s_container" ||
 		labels["project_id"] != GCPProjectIDStr ||

monitoredresource/gcp/gcp_metadata_config.go

@@ -15,15 +15,11 @@
 package gcp
 
 import (
-	"context"
-	"fmt"
 	"log"
 	"os"
 	"strings"
 
 	"cloud.google.com/go/compute/metadata"
-	container "cloud.google.com/go/container/apiv1"
-	containerpb "google.golang.org/genproto/googleapis/container/v1"
 )
 
 // gcpMetadata represents metadata retrieved from GCP (GKE and GCE) environment.
@@ -50,6 +46,7 @@ type gcpMetadata struct {
 	// zone is the Compute Engine zone in which the VM is running.
 	zone string
 
+	// monitoringV2 is currently always set to true as v1 has been deprecated.
 	monitoringV2 bool
 }
 
@@ -76,33 +73,14 @@ func retrieveGCPMetadata() *gcpMetadata {
 	logError(err)
 	gcpMetadata.clusterName = strings.TrimSpace(clusterName)
 
-	clusterLocation, err := metadata.InstanceAttributeValue("cluster-location")
-	logError(err)
-
 	// Following attributes are derived from environment variables. They are configured
 	// via yaml file. For details refer to:
 	// https://cloud.google.com/kubernetes-engine/docs/tutorials/custom-metrics-autoscaling#exporting_metrics_from_the_application
 	gcpMetadata.namespaceID = os.Getenv("NAMESPACE")
 	gcpMetadata.containerName = os.Getenv("CONTAINER_NAME")
 	gcpMetadata.podID = os.Getenv("HOSTNAME")
-
-	// Monitoring API version can be obtained from cluster info.q
-	if gcpMetadata.clusterName != "" {
-		ctx := context.Background()
-		c, err := container.NewClusterManagerClient(ctx)
-		logError(err)
-		if c != nil {
-			req := &containerpb.GetClusterRequest{
-				Name: fmt.Sprintf("projects/%s/locations/%s/clusters/%s", gcpMetadata.projectID, strings.TrimSpace(clusterLocation), gcpMetadata.clusterName),
-			}
-			resp, err := c.GetCluster(ctx, req)
-			logError(err)
-			if resp != nil && resp.GetMonitoringService() == "monitoring.googleapis.com/kubernetes" &&
-				resp.GetLoggingService() == "logging.googleapis.com/kubernetes" {
-				gcpMetadata.monitoringV2 = true
-			}
-		}
-	}
+	// Monitoring API v2 is now default.
+	gcpMetadata.monitoringV2 = true
 
 	return &gcpMetadata
 }

monitoredresource/gcp/monitored_resources.go

@@ -62,21 +62,11 @@ func (gke *GKEContainer) MonitoredResource() (resType string, labels map[string]
 		"project_id":     gke.ProjectID,
 		"cluster_name":   gke.ClusterName,
 		"container_name": gke.ContainerName,
+		"pod_name":       gke.PodID,
+		"namespace_name": gke.NamespaceID,
+		"location":       gke.Zone,
 	}
-	var typ string
-	if gke.LoggingMonitoringV2Enabled {
-		typ = "k8s_container"
-		labels["pod_name"] = gke.PodID
-		labels["namespace_name"] = gke.NamespaceID
-		labels["location"] = gke.Zone
-	} else {
-		typ = "gke_container"
-		labels["pod_id"] = gke.PodID
-		labels["namespace_id"] = gke.NamespaceID
-		labels["zone"] = gke.Zone
-		labels["instance_id"] = gke.InstanceID
-	}
-	return typ, labels
+	return "k8s_container", labels
 }
 
 // GCEInstance represents gce_instance type monitored resource.

monitoredresource/gcp/monitored_resources_test.go

@@ -42,36 +42,6 @@ func TestGKEContainerMonitoredResources(t *testing.T) {
 	}
 	autoDetected := detectResourceType(&gcpMetadata)
 
-	if autoDetected == nil {
-		t.Fatal("GKEContainerMonitoredResource nil")
-	}
-	resType, labels := autoDetected.MonitoredResource()
-	if resType != "gke_container" ||
-		labels["instance_id"] != GCPInstanceIDStr ||
-		labels["project_id"] != GCPProjectIDStr ||
-		labels["cluster_name"] != GKEClusterNameStr ||
-		labels["container_name"] != GKEContainerNameStr ||
-		labels["zone"] != GCPZoneStr ||
-		labels["namespace_id"] != GKENamespaceStr ||
-		labels["pod_id"] != GKEPodIDStr {
-		t.Errorf("GKEContainerMonitoredResource Failed: %v", autoDetected)
-	}
-}
-
-func TestGKEContainerMonitoredResourcesV2(t *testing.T) {
-	os.Setenv("KUBERNETES_SERVICE_HOST", "127.0.0.1")
-	gcpMetadata := gcpMetadata{
-		instanceID:    GCPInstanceIDStr,
-		projectID:     GCPProjectIDStr,
-		zone:          GCPZoneStr,
-		clusterName:   GKEClusterNameStr,
-		containerName: GKEContainerNameStr,
-		namespaceID:   GKENamespaceStr,
-		podID:         GKEPodIDStr,
-		monitoringV2:  true,
-	}
-	autoDetected := detectResourceType(&gcpMetadata)
-
 	if autoDetected == nil {
 		t.Fatal("GKEContainerMonitoredResource nil")
 	}