apiVersion: apps/v1
kind: StatefulSet
metadata:
  labels:
    app: hive-metastore
  name: hive-metastore  
spec:
  replicas: 1
  selector:
    matchLabels:
      app: hive-metastore
  serviceName: "hive-metastore"  
  template:
    metadata:
      labels:
        app: hive-metastore
    spec:
      containers:
      - image: docker-registry-node:5000/hive-mysql-metastore:v1
        name: hive-metastore
        ports:
            - containerPort: 9083
        ### 启动后执行命令
        lifecycle:
          postStart:
            exec:
              command: ["/bin/bash", "-c", "/opt/hive/bin/hive --service metastore &"]
        env:
          - name: "TZ"
            value: "Asia/Shanghai"
          - name: "SERVICE_PRECONDITION"
            value: "hadoop-hdfs-master:50070 mysql-svc:3306"
 

# kubectl  explain StatefulSet.spec.template.spec.containers.lifecycle
KIND:     StatefulSet
VERSION:  apps/v1

RESOURCE: lifecycle <Object>

DESCRIPTION:
     Actions that the management system should take in response to container
     lifecycle events. Cannot be updated.

     Lifecycle describes actions that the management system should take in
     response to container lifecycle events. For the PostStart and PreStop
     lifecycle handlers, management of the container blocks until the action is
     complete, unless the container process fails, in which case the handler is
     aborted.

FIELDS:
   postStart    <Object>
     PostStart is called immediately after a container is created. If the
     handler fails, the container is terminated and restarted according to its
     restart policy. Other management of the container blocks until the hook
     completes. More info:
     https://kubernetes.io/docs/concepts/containers/container-lifecycle-hooks/#container-hooks

   preStop      <Object>
     PreStop is called immediately before a container is terminated due to an
     API request or management event such as liveness/startup probe failure,
     preemption, resource contention, etc. The handler is not called if the
     container crashes or exits. The reason for termination is passed to the
     handler. The Pod's termination grace period countdown begins before the
     PreStop hooked is executed. Regardless of the outcome of the handler, the
     container will eventually terminate within the Pod's termination grace
     period. Other management of the container blocks until the hook completes
     or until the termination grace period is reached. More info:
     https://kubernetes.io/docs/concepts/containers/container-lifecycle-hooks/#container-hooks

-bash-4.2#