停止/启动集群

您可以停止/启动集群以释放计算资源。当集群停止时，其计算资源将被释放，也就是说 Kubernetes 的 Pod 将被释放，但其存储资源仍将被保留。如果你想恢复集群资源，可通过快照再次启动集群。

停止集群

1. 配置集群名称，并执行以下命令来停止该集群。

   OpsRequest

   kubectl apply -f - <<EOF
   apiVersion: apps.kubeblocks.io/v1alpha1
   kind: OpsRequest
   metadata:
     name: ops-stop
     namespace: demo
   spec:
     clusterName: mycluster
     type: Stop
   EOF

   编辑集群 YAML 文件

   将 replicas 设为 0，删除 Pods。

   kubectl edit cluster mycluster -n demo
   >
   apiVersion: apps.kubeblocks.io/v1alpha1
   kind: Cluster
   metadata:
       name: mycluster
   spec:
     clusterDefinitionRef: apecloud-mysql
     clusterVersionRef: ac-mysql-8.0.30
     terminationPolicy: Delete
     componentSpecs:
     - name: mysql
       componentDefRef: mysql
       disableExporter: true  
       replicas: 0
       volumeClaimTemplates:
       - name: data
         spec:
           storageClassName: standard
           accessModes:
             - ReadWriteOnce
           resources:
             requests:
               storage: 20Gi

   kbcli

   kbcli cluster stop mycluster -n demo

2. 查看集群状态，确认集群是否已停止。

   kbcli

   kbcli cluster list mycluster -n demo

   kubectl

   kubectl get cluster mycluster -n demo

启动集群

1. 配置集群名称，并执行以下命令来启动该集群。

   OpsRequest

   kubectl apply -f - <<EOF
   apiVersion: apps.kubeblocks.io/v1alpha1
   kind: OpsRequest
   metadata:
     name: ops-start
     namespace: demo
   spec:
     clusterName: mycluster
     type: Start
   EOF 

   编辑集群 YAML 文件

   将 replicas 数值调整为停止集群前的数量，再次启动集群。

   kubectl edit cluster mycluster -n demo
   >
   apiVersion: apps.kubeblocks.io/v1alpha1
   kind: Cluster
   metadata:
       name: mycluster
   spec:
     clusterDefinitionRef: apecloud-mysql
     clusterVersionRef: ac-mysql-8.0.30
     terminationPolicy: Delete
     componentSpecs:
     - name: mysql
       componentDefRef: mysql
       disableExporter: true
       replicas: 3
       volumeClaimTemplates:
       - name: data
         spec:
           storageClassName: standard
           accessModes:
             - ReadWriteOnce
           resources:
             requests:
               storage: 20Gi

   kbcli

   kbcli cluster start mycluster -n demo

2. 查看集群状态，确认集群是否再次启动。

   kbcli

   kbcli cluster list mycluster -n demo

   kubectl

   kubectl get cluster mycluster -n demo