Put initContainers to PodSpec for some statefulset examples.

Author: gyliu513

cockroachdb/cockroachdb-statefulset.yaml

@@ -77,46 +77,33 @@ spec:
     metadata:
       labels:
         app: cockroachdb
-      annotations:
-        # Init containers are run only once in the lifetime of a pod, before
-        # it's started up for the first time. It has to exit successfully
-        # before the pod's main containers are allowed to start.
-        # This particular init container does a DNS lookup for other pods in
-        # the set to help determine whether or not a cluster already exists.
-        # If any other pods exist, it creates a file in the cockroach-data
-        # directory to pass that information along to the primary container that
-        # has to decide what command-line flags to use when starting CockroachDB.
-        # This only matters when a pod's persistent volume is empty - if it has
-        # data from a previous execution, that data will always be used.
-        pod.alpha.kubernetes.io/init-containers: '[
-            {
-                "name": "bootstrap",
-                "image": "cockroachdb/cockroach-k8s-init:0.1",
-                "imagePullPolicy": "IfNotPresent",
-                "args": [
-                  "-on-start=/on-start.sh",
-                  "-service=cockroachdb"
-                ],
-                "env": [
-                  {
-                      "name": "POD_NAMESPACE",
-                      "valueFrom": {
-                          "fieldRef": {
-                              "apiVersion": "v1",
-                              "fieldPath": "metadata.namespace"
-                          }
-                      }
-                   }
-                ],
-                "volumeMounts": [
-                    {
-                        "name": "datadir",
-                        "mountPath": "/cockroach/cockroach-data"
-                    }
-                ]
-            }
-        ]'
     spec:
+      # Init containers are run only once in the lifetime of a pod, before
+      # it's started up for the first time. It has to exit successfully
+      # before the pod's main containers are allowed to start.
+      # This particular init container does a DNS lookup for other pods in
+      # the set to help determine whether or not a cluster already exists.
+      # If any other pods exist, it creates a file in the cockroach-data
+      # directory to pass that information along to the primary container that
+      # has to decide what command-line flags to use when starting CockroachDB.
+      # This only matters when a pod's persistent volume is empty - if it has
+      # data from a previous execution, that data will always be used.
+      initContainers:
+      - name: bootstrap
+        image: cockroachdb/cockroach-k8s-init:0.1
+        imagePullPolicy: IfNotPresent
+        args:
+          - "-on-start=/on-start.sh"
+          - "-service=cockroachdb"
+        env:
+          - name: POD_NAMESPACE
+            valueFrom:
+              fieldRef:
+                apiVersion: v1
+                fieldPath: metadata.namespace
+       volumeMounts:
+       - name: datadir
+         mountPath: "/cockroach/cockroach-data"
       affinity:
         podAntiAffinity:
           preferredDuringSchedulingIgnoredDuringExecution: