Adding CoreDNS as an addon

cmd/minikube/cmd/config/config.go

@@ -137,6 +137,12 @@ var settings = []Setting{
 		validations: []setFn{IsValidAddon},
 		callbacks:   []setFn{EnableOrDisableAddon},
 	},
+	{
+		name:        "coredns",
+		set:         SetBool,
+		validations: []setFn{IsValidAddon},
+		callbacks:   []setFn{EnableOrDisableAddon},
+	},
 	{
 		name:        "kube-dns",
 		set:         SetBool,

deploy/addons/coredns/coreDNS-clusterrole.yaml

@@ -0,0 +1,18 @@
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRole
+metadata:
+  labels:
+    kubernetes.io/bootstrapping: rbac-defaults
+    addonmanager.kubernetes.io/mode: Reconcile
+  name: system:coredns
+rules:
+- apiGroups:
+  - ""
+  resources:
+  - endpoints
+  - services
+  - pods
+  - namespaces
+  verbs:
+  - list
+  - watch

deploy/addons/coredns/coreDNS-configmap.yaml

@@ -0,0 +1,18 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: coredns
+  namespace: kube-system
+  labels:
+    addonmanager.kubernetes.io/mode: EnsureExists
+data:
+  Corefile: |
+    .:53 {
+        errors
+        log
+        health
+        kubernetes cluster.local 10.0.0.0/24
+        prometheus
+        proxy . /etc/resolv.conf
+        cache 30
+    }

deploy/addons/coredns/coreDNS-controller.yaml

@@ -0,0 +1,58 @@
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: coredns
+  namespace: kube-system
+  labels:
+    k8s-app: coredns
+    kubernetes.io/name: "CoreDNS"
+    addonmanager.kubernetes.io/mode: Reconcile
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      k8s-app: coredns
+  template:
+    metadata:
+      labels:
+        k8s-app: coredns
+      annotations:
+        scheduler.alpha.kubernetes.io/critical-pod: ''
+        scheduler.alpha.kubernetes.io/tolerations: '[{"key":"CriticalAddonsOnly", "operator":"Exists"}]'
+    spec:
+      serviceAccountName: coredns
+      containers:
+      - name: coredns
+        image: coredns/coredns:011
+        imagePullPolicy: Always
+        args: [ "-conf", "/etc/coredns/Corefile" ]
+        volumeMounts:
+        - name: config-volume
+          mountPath: /etc/coredns
+        ports:
+        - containerPort: 53
+          name: dns
+          protocol: UDP
+        - containerPort: 53
+          name: dns-tcp
+          protocol: TCP
+        - containerPort: 9153
+          name: metrics
+          protocol: TCP
+        livenessProbe:
+          httpGet:
+            path: /health
+            port: 8080
+            scheme: HTTP
+          initialDelaySeconds: 60
+          timeoutSeconds: 5
+          successThreshold: 1
+          failureThreshold: 5
+      dnsPolicy: Default
+      volumes:
+        - name: config-volume
+          configMap:
+            name: coredns
+            items:
+            - key: Corefile
+              path: Corefile

deploy/addons/coredns/coreDNS-crbinding.yaml

@@ -0,0 +1,17 @@
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRoleBinding
+metadata:
+  annotations:
+    rbac.authorization.kubernetes.io/autoupdate: "true"
+  labels:
+    kubernetes.io/bootstrapping: rbac-defaults
+    addonmanager.kubernetes.io/mode: EnsureExists
+  name: system:coredns
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: system:coredns
+subjects:
+- kind: ServiceAccount
+  name: coredns
+  namespace: kube-system

deploy/addons/coredns/coreDNS-sa.yaml

@@ -0,0 +1,7 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: coredns
+  namespace: kube-system
+  labels:
+    addonmanager.kubernetes.io/mode: Reconcile

deploy/addons/coredns/coreDNS-svc.yaml

@@ -0,0 +1,23 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: coredns
+  namespace: kube-system
+  labels:
+    k8s-app: coredns
+    kubernetes.io/name: "CoreDNS"
+    addonmanager.kubernetes.io/mode: Reconcile
+spec:
+  selector:
+    k8s-app: coredns
+  clusterIP: 10.0.0.10
+  ports:
+  - name: dns
+    port: 53
+    protocol: UDP
+  - name: dns-tcp
+    port: 53
+    protocol: TCP
+  - name: metrics
+    port: 9153
+    protocol: TCP

pkg/minikube/assets/addons.go

@@ -82,6 +82,38 @@ var Addons = map[string]*Addon{
 			"storageclass.yaml",
 			"0640"),
 	}, true, "default-storageclass"),
+	"coredns": NewAddon([]*BinDataAsset{
+		NewBinDataAsset(
+			"deploy/addons/coredns/coreDNS-controller.yaml",
+			constants.AddonsPath,
+			"coreDNS-controller.yaml",
+			"0640"),
+		NewBinDataAsset(
+			"deploy/addons/coredns/coreDNS-configmap.yaml",
+			constants.AddonsPath,
+			"coreDNS-configmap.yaml",
+			"0640"),
+		NewBinDataAsset(
+			"deploy/addons/coredns/coreDNS-svc.yaml",
+			constants.AddonsPath,
+			"coreDNS-svc.yaml",
+			"0640"),
+		NewBinDataAsset(
+			"deploy/addons/coredns/coreDNS-crbinding.yaml",
+			constants.AddonsPath,
+			"coreDNS-crbinding.yaml",
+			"0640"),
+		NewBinDataAsset(
+			"deploy/addons/coredns/coreDNS-sa.yaml",
+			constants.AddonsPath,
+			"coreDNS-sa.yaml",
+			"0640"),
+		NewBinDataAsset(
+			"deploy/addons/coredns/coreDNS-clusterrole.yaml",
+			constants.AddonsPath,
+			"coreDNS-clusterrole.yaml",
+			"0640"),
+	}, false, "coredns"),
 	"kube-dns": NewAddon([]*BinDataAsset{
 		NewBinDataAsset(
 			"deploy/addons/kube-dns/kube-dns-controller.yaml",