Merge pull request #50823 from zjj2wry/set-image

Automatic merge from submit-queue (batch tested with PRs 50277, 50823, 50376, 50867)

fix issue(#50821)Add image check, if image not changed, transform false

**What this PR does / why we need it**:
closes #50821 
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

hack/make-rules/test-cmd-util.sh

@@ -2848,6 +2848,10 @@ run_deployment_tests() {
   kubectl set image deployment nginx-deployment "*"="${IMAGE_DEPLOYMENT_R1}" "${kube_flags[@]}"
   kube::test::get_object_assert deployment "{{range.items}}{{$deployment_image_field}}:{{end}}" "${IMAGE_DEPLOYMENT_R1}:"
   kube::test::get_object_assert deployment "{{range.items}}{{$deployment_second_image_field}}:{{end}}" "${IMAGE_DEPLOYMENT_R1}:"
+  # Set image of all containners of the deployment again when image not change
+  kubectl set image deployment nginx-deployment "*"="${IMAGE_DEPLOYMENT_R1}" "${kube_flags[@]}"
+  kube::test::get_object_assert deployment "{{range.items}}{{$deployment_image_field}}:{{end}}" "${IMAGE_DEPLOYMENT_R1}:"
+  kube::test::get_object_assert deployment "{{range.items}}{{$deployment_second_image_field}}:{{end}}" "${IMAGE_DEPLOYMENT_R1}:"
   # Clean up
   kubectl delete deployment nginx-deployment "${kube_flags[@]}"
 

pkg/kubectl/cmd/set/set_image.go

@@ -196,9 +196,11 @@ func (o *ImageOptions) Run() error {
 								continue
 							}
 						}
-						spec.Containers[i].Image = resolved
-						// Perform updates
-						transformed = true
+						if spec.Containers[i].Image != resolved {
+							spec.Containers[i].Image = resolved
+							// Perform updates
+							transformed = true
+						}
 					}
 				}
 				// Add a new container if not found