Add stats label filter test

Adding a conformance test for filtering stats by container labels.

Signed-off-by: Sascha Grunert <sgrunert@redhat.com>

pkg/framework/util.go

@@ -253,14 +253,20 @@ func BuildContainerMetadata(containerName string, attempt uint32) *runtimeapi.Co
 	}
 }
 
-// CreateDefaultContainer creates a  default container with default options.
+// CreateDefaultContainer creates a default container with default options.
 func CreateDefaultContainer(rc internalapi.RuntimeService, ic internalapi.ImageManagerService, podID string, podConfig *runtimeapi.PodSandboxConfig, prefix string) string {
+	return CreateDefaultContainerWithLabels(rc, ic, podID, podConfig, prefix, nil)
+}
+
+// CreateDefaultContainerWithLabels creates a default container with default options
+func CreateDefaultContainerWithLabels(rc internalapi.RuntimeService, ic internalapi.ImageManagerService, podID string, podConfig *runtimeapi.PodSandboxConfig, prefix string, labels map[string]string) string {
 	containerName := prefix + NewUUID()
 	containerConfig := &runtimeapi.ContainerConfig{
 		Metadata: BuildContainerMetadata(containerName, DefaultAttempt),
 		Image:    &runtimeapi.ImageSpec{Image: TestContext.TestImageList.DefaultTestContainerImage},
 		Command:  DefaultContainerCommand,
 		Linux:    &runtimeapi.LinuxContainerConfig{},
+		Labels:   labels,
 	}
 
 	return CreateContainer(rc, ic, containerConfig, podID, podConfig)

pkg/validate/container.go

@@ -239,6 +239,22 @@ var _ = framework.KubeDescribe("Container", func() {
 			Expect(statFound(stats, secondContainerID)).To(BeTrue(), "Stats should be found")
 			Expect(statFound(stats, thirdContainerID)).To(BeTrue(), "Stats should be found")
 		})
+
+		It("runtime should support listing stats for containers filtered by labels [Conformance]", func() {
+			By("create container")
+			labels := map[string]string{"foo": "bar"}
+			containerID := framework.CreateDefaultContainerWithLabels(rc, ic, podID, podConfig, "container-for-stats-with-labels-", labels)
+
+			By("start container")
+			startContainer(rc, containerID)
+
+			By("test container stats")
+			stats := listContainerStats(rc, &runtimeapi.ContainerStatsFilter{LabelSelector: labels})
+			Expect(statFound(stats, containerID)).To(BeTrue(), "Container should be found")
+
+			stats = listContainerStats(rc, &runtimeapi.ContainerStatsFilter{LabelSelector: map[string]string{"foo": "baz"}})
+			Expect(statFound(stats, containerID)).To(BeFalse(), "Container should be filtered")
+		})
 	})
 
 	Context("runtime should support adding volume and device", func() {