Update coredns from upstream manifest and to 1.3.1

5fe683c057/kubernetes/coredns.yaml.sed

story: 2003993
task: 30493

Change-Id: I0b0b4f98c20748c37c2d2f498ced222a53b52214
Signed-off-by: Spyros Trigazis <spyridon.trigazis@cern.ch>

doc/source/user/index.rst

@@ -326,6 +326,8 @@ the table are linked to more details elsewhere in the user guide.
 +---------------------------------------+--------------------+---------------+
 | `etcd_tag`_                           | see below          | see below     |
 +---------------------------------------+--------------------+---------------+
+| `coredns_tag`_                        | see below          | see below     |
++---------------------------------------+--------------------+---------------+
 | `flannel_tag`_                        | see below          | see below     |
 +---------------------------------------+--------------------+---------------+
 | `flannel_cni_tag`_                    | see below          | see below     |
@@ -1119,7 +1121,7 @@ _`container_infra_prefix`
 
   Images that must be mirrored:
 
-  * docker.io/coredns/coredns:1.3.0
+  * docker.io/coredns/coredns:1.3.1
   * docker.io/openstackmagnum/etcd
   * docker.io/openstackmagnum/flannel
   * docker.io/openstackmagnum/kubernetes-apiserver
@@ -1172,6 +1174,13 @@ _`etcd_tag`
   If unset, the current Magnum version's a default etcd version.
   For queens, v3.2.7
 
+_`coredns_tag`
+  This label allows users to select `a specific coredns version,
+  based on its container tag
+  <https://hub.docker.com/r/coredns/coredns/tags/>`_.
+  If unset, the current Magnum version's a default etcd version.
+  For stein, 1.3.1
+
 _`flannel_tag`
   This label allows users to select `a specific flannel version,
   based on its container tag:

magnum/drivers/common/templates/kubernetes/fragments/core-dns-service.sh

@@ -19,7 +19,7 @@ metadata:
   name: coredns
   namespace: kube-system
 ---
-apiVersion: rbac.authorization.k8s.io/v1beta1
+apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRole
 metadata:
   labels:
@@ -36,8 +36,14 @@ rules:
   verbs:
   - list
   - watch
+- apiGroups:
+  - ""
+  resources:
+  - nodes
+  verbs:
+  - get
 ---
-apiVersion: rbac.authorization.k8s.io/v1beta1
+apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRoleBinding
 metadata:
   annotations:
@@ -67,44 +73,64 @@ data:
         health
         kubernetes ${DNS_CLUSTER_DOMAIN} ${PORTAL_NETWORK_CIDR} ${PODS_NETWORK_CIDR} {
            pods verified
+           upstream
+           fallthrough in-addr.arpa ip6.arpa
         }
         prometheus :9153
-        proxy . /etc/resolv.conf
+        forward . /etc/resolv.conf
         cache 30
+        loop
+        reload
+        loadbalance
     }
+
 ---
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: coredns
   namespace: kube-system
   labels:
-    k8s-app: coredns
+    k8s-app: kube-dns
     kubernetes.io/name: "CoreDNS"
 spec:
-  replicas: 1
+  replicas: 2
+  strategy:
+    type: RollingUpdate
+    rollingUpdate:
+      maxUnavailable: 1
   selector:
     matchLabels:
-      k8s-app: coredns
+      k8s-app: kube-dns
   template:
     metadata:
       labels:
-        k8s-app: coredns
+        k8s-app: kube-dns
     spec:
+      priorityClassName: system-cluster-critical
       serviceAccountName: coredns
       tolerations:
-        - key: node-role.kubernetes.io/master
-          effect: NoSchedule
         - key: "CriticalAddonsOnly"
           operator: "Exists"
+      nodeSelector:
+        beta.kubernetes.io/os: linux
       containers:
       - name: coredns
-        image: ${_dns_prefix}coredns:1.3.0
+        image: ${_dns_prefix}coredns:${COREDNS_TAG}
         imagePullPolicy: IfNotPresent
+        resources:
+          limits:
+            memory: 170Mi
+          requests:
+            cpu: 100m
+            memory: 70Mi
         args: [ "-conf", "/etc/coredns/Corefile" ]
         volumeMounts:
         - name: config-volume
           mountPath: /etc/coredns
+          readOnly: true
+        - name: tmp
+          mountPath: /tmp
         ports:
         - containerPort: 53
           name: dns
@@ -115,6 +141,14 @@ spec:
         - containerPort: 9153
           name: metrics
           protocol: TCP
+        securityContext:
+          allowPrivilegeEscalation: false
+          capabilities:
+            add:
+            - NET_BIND_SERVICE
+            drop:
+            - all
+          readOnlyRootFilesystem: true
         livenessProbe:
           httpGet:
             path: /health
@@ -124,8 +158,15 @@ spec:
           timeoutSeconds: 5
           successThreshold: 1
           failureThreshold: 5
+        readinessProbe:
+          httpGet:
+            path: /health
+            port: 8080
+            scheme: HTTP
       dnsPolicy: Default
       volumes:
+        - name: tmp
+          emptyDir: {}
         - name: config-volume
           configMap:
             name: coredns
@@ -138,13 +179,16 @@ kind: Service
 metadata:
   name: kube-dns
   namespace: kube-system
+  annotations:
+    prometheus.io/port: "9153"
+    prometheus.io/scrape: "true"
   labels:
-    k8s-app: coredns
+    k8s-app: kube-dns
     kubernetes.io/cluster-service: "true"
     kubernetes.io/name: "CoreDNS"
 spec:
   selector:
-    k8s-app: coredns
+    k8s-app: kube-dns
   clusterIP: ${DNS_SERVICE_IP}
   ports:
   - name: dns

magnum/drivers/common/templates/kubernetes/fragments/write-heat-params-master.yaml

@@ -47,6 +47,7 @@ write_files:
       CLOUD_PROVIDER_TAG="$CLOUD_PROVIDER_TAG"
       CLOUD_PROVIDER_ENABLED="$CLOUD_PROVIDER_ENABLED"
       ETCD_TAG="$ETCD_TAG"
+      COREDNS_TAG="$COREDNS_TAG"
       FLANNEL_TAG="$FLANNEL_TAG"
       FLANNEL_CNI_TAG="$FLANNEL_CNI_TAG"
       KUBE_VERSION="$KUBE_VERSION"

magnum/drivers/heat/k8s_coreos_template_def.py

@@ -126,7 +126,8 @@ class CoreOSK8sTemplateDefinition(k8s_template_def.K8sTemplateDefinition):
             extra_params["pods_network_cidr"] = \
                 cluster.labels.get('calico_ipv4pool', '192.168.0.0/16')
 
-        label_list = ['kube_tag', 'container_infra_prefix',
+        label_list = ['coredns_tag',
+                      'kube_tag', 'container_infra_prefix',
                       'availability_zone',
                       'calico_tag', 'calico_cni_tag',
                       'calico_kube_controllers_tag', 'calico_ipv4pool',

magnum/drivers/heat/k8s_fedora_template_def.py

@@ -115,8 +115,10 @@ class K8sFedoraTemplateDefinition(k8s_template_def.K8sTemplateDefinition):
                 '"cinder" volume driver needs "cloud_provider_enabled" label '
                 'to be true or unset.'))
 
-        label_list = ['kube_tag', 'container_infra_prefix',
+        label_list = ['coredns_tag',
-                      'availability_zone', 'cgroup_driver',
+                      'kube_tag', 'container_infra_prefix',
+                      'availability_zone',
+                      'cgroup_driver',
                       'calico_tag', 'calico_cni_tag',
                       'calico_kube_controllers_tag', 'calico_ipv4pool',
                       'etcd_tag', 'flannel_tag', 'flannel_cni_tag',

magnum/drivers/k8s_coreos_v1/templates/kubecluster.yaml

@@ -330,6 +330,11 @@ parameters:
     description: tag of the etcd system container
     default: v3.2.7
 
+  coredns_tag:
+    type: string
+    description: tag for coredns
+    default: 1.3.1
+
   flannel_tag:
     type: string
     description: tag of the flannel system containers
@@ -681,6 +686,7 @@ resources:
           kube_tag: {get_param: kube_tag}
           kube_version: {get_param: kube_version}
           etcd_tag: {get_param: etcd_tag}
+          coredns_tag: {get_param: coredns_tag}
           kube_dashboard_version: {get_param: kube_dashboard_version}
           trustee_user_id: {get_param: trustee_user_id}
           trustee_password: {get_param: trustee_password}

magnum/drivers/k8s_coreos_v1/templates/kubemaster.yaml

@@ -219,6 +219,10 @@ parameters:
     type: string
     description: tag of the etcd system container
 
+  coredns_tag:
+    type: string
+    description: tag for coredns
+
   kube_version:
     type: string
     description: version of kubernetes used for kubernetes cluster

magnum/drivers/k8s_fedora_atomic_v1/templates/kubecluster.yaml

@@ -351,6 +351,11 @@ parameters:
     description: tag of the etcd system container
     default: v3.2.7
 
+  coredns_tag:
+    type: string
+    description: tag for coredns
+    default: 1.3.1
+
   flannel_tag:
     type: string
     description: tag of the flannel container
@@ -850,6 +855,7 @@ resources:
           cloud_provider_enabled: {get_param: cloud_provider_enabled}
           kube_version: {get_param: kube_version}
           etcd_tag: {get_param: etcd_tag}
+          coredns_tag: {get_param: coredns_tag}
           flannel_tag: {get_param: flannel_tag}
           flannel_cni_tag: {get_param: flannel_cni_tag}
           kube_dashboard_version: {get_param: kube_dashboard_version}

magnum/drivers/k8s_fedora_atomic_v1/templates/kubemaster.yaml

@@ -239,6 +239,10 @@ parameters:
     type: string
     description: tag of the etcd system container
 
+  coredns_tag:
+    type: string
+    description: tag of the coredns container
+
   flannel_tag:
     type: string
     description: tag of the flannel system containers
@@ -551,6 +555,7 @@ resources:
             "$CLOUD_PROVIDER_TAG": {get_param: cloud_provider_tag}
             "$CLOUD_PROVIDER_ENABLED": {get_param: cloud_provider_enabled}
             "$ETCD_TAG": {get_param: etcd_tag}
+            "$COREDNS_TAG": {get_param: coredns_tag}
             "$FLANNEL_TAG": {get_param: flannel_tag}
             "$FLANNEL_CNI_TAG": {get_param: flannel_cni_tag}
             "$KUBE_VERSION": {get_param: kube_version}

magnum/tests/unit/drivers/test_template_definition.py

@@ -452,6 +452,7 @@ class AtomicK8sTemplateDefinitionTestCase(BaseK8sTemplateDefinitionTestCase):
             'etcd_volume_size')
         kube_tag = mock_cluster.labels.get('kube_tag')
         etcd_tag = mock_cluster.labels.get('etcd_tag')
+        coredns_tag = mock_cluster.labels.get('coredns_tag')
         flannel_tag = mock_cluster.labels.get('flannel_tag')
         flannel_cni_tag = mock_cluster.labels.get('flannel_cni_tag')
         container_infra_prefix = mock_cluster.labels.get(
@@ -559,6 +560,7 @@ class AtomicK8sTemplateDefinitionTestCase(BaseK8sTemplateDefinitionTestCase):
             'region_name': mock_osc.cinder_region_name.return_value,
             'kube_tag': kube_tag,
             'etcd_tag': etcd_tag,
+            'coredns_tag': coredns_tag,
             'flannel_tag': flannel_tag,
             'flannel_cni_tag': flannel_cni_tag,
             'container_infra_prefix': container_infra_prefix,
@@ -845,6 +847,7 @@ class AtomicK8sTemplateDefinitionTestCase(BaseK8sTemplateDefinitionTestCase):
             'etcd_volume_size')
         kube_tag = mock_cluster.labels.get('kube_tag')
         etcd_tag = mock_cluster.labels.get('etcd_tag')
+        coredns_tag = mock_cluster.labels.get('coredns_tag')
         flannel_tag = mock_cluster.labels.get('flannel_tag')
         flannel_cni_tag = mock_cluster.labels.get('flannel_cni_tag')
         container_infra_prefix = mock_cluster.labels.get(
@@ -954,6 +957,7 @@ class AtomicK8sTemplateDefinitionTestCase(BaseK8sTemplateDefinitionTestCase):
             'kubernetes_port': 8080,
             'kube_tag': kube_tag,
             'etcd_tag': etcd_tag,
+            'coredns_tag': coredns_tag,
             'flannel_tag': flannel_tag,
             'flannel_cni_tag': flannel_cni_tag,
             'container_infra_prefix': container_infra_prefix,

releasenotes/notes/coredns-update-9b03da4b89be18ad.yaml

@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    Add coredns_tag label to control the tag of the coredns container in
+    k8s_fedora_atomic. Taken from https://hub.docker.com/r/coredns/coredns/tags/
+    Since stein default to 1.3.1