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Stop/Start a MySQL cluster

You can stop/start a cluster to save computing resources. When a cluster is stopped, the computing resources of this cluster are released, which means the pods of Kubernetes are released, but the storage resources are reserved. You can start this cluster again by snapshots if you want to restore the cluster resources.

Stop a cluster​

You can stop a cluster by OpsRequest or changing the YAML file of the cluster.

Run the command below to stop a cluster.

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

Configure replicas as 0 to delete pods.

apiVersion: apps.kubeblocks.io/v1alpha1
kind: Cluster
metadata:
  name: mycluster
  namespace: demo
spec:
  clusterDefinitionRef: mysql
  clusterVersionRef: mysql-8.0.33
  terminationPolicy: Delete
  componentSpecs:
  - name: mysql
    componentDefRef: mysql
    disableExporter: true  
    replicas: 0
    volumeClaimTemplates:
    - name: data
      spec:
        storageClassName: standard
        accessModes:
          - ReadWriteOnce
        resources:
          requests:
            storage: 20Gi

Start a cluster​

You can stop a cluster by OpsRequest or changing the YAML file of the cluster.

Run the command below to start a cluster.

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

Change replicas back to the original amount to start this cluster again.

apiVersion: apps.kubeblocks.io/v1alpha1
kind: Cluster
metadata:
  name: mycluster
  namespace: demo
spec:
  clusterDefinitionRef: mysql
  clusterVersionRef: mysql-8.0.33
  terminationPolicy: Delete
  componentSpecs:
  - name: mysql
    componentDefRef: mysql
    disableExporter: true  
    replicas: 2
    volumeClaimTemplates:
    - name: data
      spec:
        storageClassName: standard
        accessModes:
          - ReadWriteOnce
        resources:
          requests:
            storage: 20Gi