*: add taint to master nodes and tolerations to etcd pods

Author: hongchaodeng

hack/multi-node/user-data.sample

@@ -32,6 +32,7 @@ coreos:
           --allow-privileged \
           --hostname-override=${COREOS_PUBLIC_IPV4} \
           --node-labels=node-role.kubernetes.io/master \
+           --register-with-taints=node-role.kubernetes.io/master=:NoSchedule \
           --cluster_dns=10.3.0.10 \
           --cluster_domain=cluster.local
 

hack/quickstart/kubelet.master

@@ -24,6 +24,7 @@ ExecStart=/usr/lib/coreos/kubelet-wrapper \
   --allow-privileged \
   --hostname-override=${COREOS_PRIVATE_IPV4} \
   --node-labels=node-role.kubernetes.io/master \
+  --register-with-taints=node-role.kubernetes.io/master=:NoSchedule \
   --cluster_dns=10.3.0.10 \
   --cluster_domain=cluster.local \
   --pod-manifest-path=/etc/kubernetes/manifests

pkg/util/etcdutil/migrate.go

@@ -130,7 +130,14 @@ func createMigratedEtcdCluster(restclient restclient.Interface, podIP string) er
     "pod": {
       "nodeSelector": {
         "node-role.kubernetes.io/master": ""
-      }
+      },
+      "tolerations": [
+        {
+          "key": "node-role.kubernetes.io/master",
+          "operator": "Exists",
+          "effect": "NoSchedule"
+        }
+      ]
     },
     "selfHosted": {
       "bootMemberClientEndpoint": "http://%s:12379"