KubeBlocks
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KubeBlocks for MySQL

Cluster Management

Create and connect
Scale
Expand volume
Restart
Stop/Start
Switchover
Delete protection

Configuration

Configuration

High Availability

Failure simulation and automatic recovery
  1. Stop a cluster
  2. Start a cluster

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 to restore it to the state it was in before it was stopped.

Stop a cluster

  1. Configure the name of your cluster and run the command below to stop this cluster.

    Apply an OpsRequest 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
    kubectl edit cluster mycluster -n demo

    Configure replicas as 0 to delete pods.

    ... spec: clusterDefinitionRef: mysql clusterVersionRef: mysql-8.0.33 terminationPolicy: Delete componentSpecs: - name: mysql componentDefRef: mysql disableExporter: true replicas: 0 # Change this value ...
    kbcli cluster stop mycluster -n demo
  2. Check the status of the cluster to see whether it is stopped.

    kubectl get cluster mycluster -n demo
    kbcli cluster list mycluster -n demo

Start a cluster

  1. Configure the name of your cluster and run the command below to start this cluster.

    Apply an OpsRequest 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
    kubectl edit cluster mycluster -n demo

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

    ... spec: clusterDefinitionRef: mysql clusterVersionRef: mysql-8.0.33 terminationPolicy: Delete componentSpecs: - name: mysql componentDefRef: mysql disableExporter: true replicas: 2 # Change this value ...
    kbcli cluster start mycluster -n demo
  2. Check the status of the cluster to see whether it is running again.

    kubectl get cluster mycluster -n demo
    kbcli cluster list mycluster -n demo

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