Reflect tektoncd/pipeline release version as an annotation on pod

As a followup to tektoncd#1650 ,
the `tekton.dev/release` annotation is set on the pod to reflect
the value of version.PipelineVersion

Signed-off-by: Vibhav Bobade <vibhav.bobde@gmail.com>

Author: waveywaves

pkg/pod/entrypoint.go

@@ -19,6 +19,7 @@ package pod
 import (
 	"errors"
 	"fmt"
+	"github.com/tektoncd/pipeline/pkg/version"
 	"path/filepath"
 	"strings"
 
@@ -43,6 +44,8 @@ const (
 )
 
 var (
+	releaseAnnotation      = "tekon.dev/release"
+	releaseAnnotationValue = version.PipelineVersion
 	// TODO(#1605): Generate volumeMount names, to avoid collisions.
 	toolsMount = corev1.VolumeMount{
 		Name:      toolsVolumeName,
@@ -148,6 +151,7 @@ func UpdateReady(kubeclient kubernetes.Interface, pod corev1.Pod) error {
 	// start.
 	if newPod.ObjectMeta.Annotations == nil {
 		newPod.ObjectMeta.Annotations = map[string]string{}
+		newPod.ObjectMeta.Annotations[releaseAnnotation] = releaseAnnotationValue
 	}
 	if newPod.ObjectMeta.Annotations[readyAnnotation] != readyAnnotationValue {
 		newPod.ObjectMeta.Annotations[readyAnnotation] = readyAnnotationValue

pkg/pod/pod.go

@@ -18,6 +18,7 @@ package pod
 
 import (
 	"fmt"
+	"github.com/tektoncd/pipeline/pkg/version"
 	"path/filepath"
 
 	"github.com/tektoncd/pipeline/pkg/apis/pipeline"
@@ -42,6 +43,9 @@ const (
 
 // These are effectively const, but Go doesn't have such an annotation.
 var (
+	releaseAnnotation      = "tekon.dev/release"
+	releaseAnnotationValue = version.PipelineVersion
+
 	groupVersionKind = schema.GroupVersionKind{
 		Group:   v1alpha1.SchemeGroupVersion.Group,
 		Version: v1alpha1.SchemeGroupVersion.Version,
@@ -179,6 +183,9 @@ func MakePod(images pipeline.Images, taskRun *v1alpha1.TaskRun, taskSpec v1alpha
 		mergedPodContainers = append(mergedPodContainers, sc)
 	}
 
+	podAnnotations := taskRun.Annotations
+	podAnnotations[releaseAnnotation] = releaseAnnotationValue
+
 	return &corev1.Pod{
 		ObjectMeta: metav1.ObjectMeta{
 			// We execute the build's pod in the same namespace as where the build was
@@ -193,7 +200,7 @@ func MakePod(images pipeline.Images, taskRun *v1alpha1.TaskRun, taskSpec v1alpha
 			OwnerReferences: []metav1.OwnerReference{
 				*metav1.NewControllerRef(taskRun, groupVersionKind),
 			},
-			Annotations: taskRun.Annotations,
+			Annotations: podAnnotations,
 			Labels:      makeLabels(taskRun),
 		},
 		Spec: corev1.PodSpec{