Merge pull request #64775 from rajansandeep/imgcoredns

Automatic merge from submit-queue (batch tested with PRs 63322, 64718, 64708, 64775, 64777). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

CoreDNS to use gcr.io repo 

**What this PR does / why we need it**:
Switch CoreDNS to use the gcr.io in kubeadm

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
CoreDNS deployment configuration now uses k8s.gcr.io imageRepository
```

cmd/kubeadm/app/phases/addons/dns/dns.go

@@ -161,9 +161,10 @@ func createKubeDNSAddon(deploymentBytes, serviceBytes []byte, client clientset.I
 func coreDNSAddon(cfg *kubeadmapi.MasterConfiguration, client clientset.Interface, k8sVersion *version.Version) error {
 	// Get the YAML manifest conditionally based on the k8s version
 	dnsDeploymentBytes := GetCoreDNSManifest(k8sVersion)
-	coreDNSDeploymentBytes, err := kubeadmutil.ParseTemplate(dnsDeploymentBytes, struct{ MasterTaintKey, Version string }{
-		MasterTaintKey: kubeadmconstants.LabelNodeRoleMaster,
-		Version:        GetDNSVersion(k8sVersion, kubeadmconstants.CoreDNS),
+	coreDNSDeploymentBytes, err := kubeadmutil.ParseTemplate(dnsDeploymentBytes, struct{ ImageRepository, MasterTaintKey, Version string }{
+		ImageRepository: cfg.ImageRepository,
+		MasterTaintKey:  kubeadmconstants.LabelNodeRoleMaster,
+		Version:         GetDNSVersion(k8sVersion, kubeadmconstants.CoreDNS),
 	})
 	if err != nil {
 		return fmt.Errorf("error when parsing CoreDNS deployment template: %v", err)

cmd/kubeadm/app/phases/addons/dns/dns_test.go

@@ -115,9 +115,10 @@ func TestCompileManifests(t *testing.T) {
 		},
 		{
 			manifest: CoreDNSDeployment,
-			data: struct{ MasterTaintKey, Version string }{
-				MasterTaintKey: "foo",
-				Version:        "foo",
+			data: struct{ ImageRepository, MasterTaintKey, Version string }{
+				ImageRepository: "foo",
+				MasterTaintKey:  "foo",
+				Version:         "foo",
 			},
 			expected: true,
 		},

cmd/kubeadm/app/phases/addons/dns/manifests.go

@@ -247,7 +247,7 @@ spec:
         effect: NoSchedule
       containers:
       - name: coredns
-        image: coredns/coredns:{{ .Version }}
+        image: {{ .ImageRepository }}/coredns:{{ .Version }}
         imagePullPolicy: IfNotPresent
         resources:
           limits: