Merge pull request #57296 from xiangpengzhao/update-coredns-corefile

Automatic merge from submit-queue. 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>.

Update CoreDNS version and Corefile in kubeadm

**What this PR does / why we need it**:
We bumped CoreDNS version to 1.0.0 (#56802) and added CoreDNS as an optional addon in kube-up (#55728), but something wrt log was missed.  The log option of CoreDNS was changed since 1.0.0. We should update the Corefile to reflect the change.

**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 https://github.com/kubernetes/kubernetes/issues/57277

ref: https://github.com/coredns/coredns/issues/1218 https://github.com/coredns/coredns/pull/1221

**Special notes for your reviewer**:
/cc @luxas @rajansandeep
cc @fturib @johnbelamaric

**Release note**:

```release-note
NONE
```

cluster/addons/dns/coredns.yaml.base

@@ -57,9 +57,11 @@ data:
   Corefile: |
     .:53 {
         errors
-        log stdout
+        log
         health
-        kubernetes __PILLAR__DNS__DOMAIN__ __PILLAR__CLUSTER_CIDR__
+        kubernetes __PILLAR__DNS__DOMAIN__ __PILLAR__CLUSTER_CIDR__ {
+            pods insecure
+        }
         prometheus
         proxy . /etc/resolv.conf
         cache 30
@@ -93,7 +95,7 @@ spec:
           operator: "Exists"
       containers:
       - name: coredns
-        image: coredns/coredns:0.9.10
+        image: coredns/coredns:1.0.1
         imagePullPolicy: IfNotPresent
         resources:
           limits:

cluster/addons/dns/coredns.yaml.in

@@ -57,9 +57,11 @@ data:
   Corefile: |
     .:53 {
         errors
-        log stdout
+        log
         health
-        kubernetes {{ pillar['dns_domain'] }} {{ pillar['service_cluster_ip_range'] }}
+        kubernetes {{ pillar['dns_domain'] }} {{ pillar['service_cluster_ip_range'] }} {
+            pods insecure
+        }
         prometheus
         proxy . /etc/resolv.conf
         cache 30
@@ -93,7 +95,7 @@ spec:
           operator: "Exists"
       containers:
       - name: coredns
-        image: coredns/coredns:0.9.10
+        image: coredns/coredns:1.0.1
         imagePullPolicy: IfNotPresent
         resources:
           limits:

cluster/addons/dns/coredns.yaml.sed

@@ -57,9 +57,11 @@ data:
   Corefile: |
     .:53 {
         errors
-        log stdout
+        log
         health
-        kubernetes $DNS_DOMAIN $SERVICE_CLUSTER_IP_RANGE
+        kubernetes $DNS_DOMAIN $SERVICE_CLUSTER_IP_RANGE {
+            pods insecure
+        }
         prometheus
         proxy . /etc/resolv.conf
         cache 30
@@ -93,7 +95,7 @@ spec:
           operator: "Exists"
       containers:
       - name: coredns
-        image: coredns/coredns:0.9.10
+        image: coredns/coredns:1.0.1
         imagePullPolicy: IfNotPresent
         resources:
           limits:

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

@@ -293,7 +293,7 @@ data:
   Corefile: |
     .:53 {
         errors
-        log stdout
+        log
         health
         kubernetes {{ .DNSDomain }} {{ .ServiceCIDR }} {
            pods insecure

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

@@ -27,14 +27,14 @@ const (
 
 	kubeDNSProbeSRV = "SRV"
 	kubeDNSProbeA   = "A"
-	coreDNSVersion  = "1.0.0"
+	coreDNSVersion  = "1.0.1"
 )
 
 // GetDNSVersion returns the right kube-dns version for a specific k8s version
 func GetDNSVersion(kubeVersion *version.Version, dns string) string {
 	// v1.8.0+ uses kube-dns 1.14.5
 	// v1.9.0+ uses kube-dns 1.14.7
-	// v1.9.0+ uses CoreDNS  1.0.0
+	// v1.9.0+ uses CoreDNS  1.0.1
 
 	// In the future when the version is bumped at HEAD; add conditional logic to return the right versions
 	// Also, the version might be bumped for different k8s releases on the same branch