fix(executor): Fix compatibility issue with k8s>=1.21 when selfLink i…

…s no longer populated (#5992)

workflow/executor/resource.go

@@ -60,8 +60,11 @@ func (we *WorkflowExecutor) ExecResource(action string, manifestPath string, fla
  return "", "", "", errors.New(errors.CodeBadRequest, "Kind and name are both required but at least one of them is missing from the manifest")
  }
  resourceFullName := fmt.Sprintf("%s.%s/%s", resourceKind, resourceGroup, resourceName)
- selfLink := obj.GetSelfLink()
- log.Infof("Resource: %s/%s. SelfLink: %s", obj.GetNamespace(), resourceFullName, selfLink)
+ resourceNamespace := obj.GetNamespace()
+ // We cannot use `obj.GetSelfLink()` directly since it is deprecated and will be removed after Kubernetes 1.21: https://github.com/kubernetes/enhancements/tree/master/keps/sig-api-machinery/1164-remove-selflink
+ selfLink := fmt.Sprintf("apis/%s/namespaces/%s/%s/%s",
+ obj.GetAPIVersion(), resourceNamespace, resourceKind, resourceName)
+ log.Infof("Resource: %s/%s. SelfLink: %s", resourceNamespace, resourceFullName, selfLink)
  return obj.GetNamespace(), resourceFullName, selfLink, nil
 }