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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

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

kbcli cluster stop mysql-cluster

Option 2. Create an OpsRequest

Run the command below to stop a cluster.

kubectl apply -f - <<EOF
apiVersion: apps.kubeblocks.io/v1alpha1
kind: OpsRequest
metadata:
name: mysql-cluster
generateName: stop-
spec:
# cluster ref
clusterRef: mysql-cluster
type: Stop
EOF

Option 3. Change the YAML file of the cluster

Configure replicas as 0 to delete pods.

apiVersion: apps.kubeblocks.io/v1alpha1
kind: Cluster
metadata:
name: mysql-cluster
spec:
clusterDefinitionRef: apecloud-mysql
clusterVersionRef: ac-mysql-8.0.30
terminationPolicy: WipeOut
componentSpecs:
- name: mysql
componentDefRef: mysql
monitor: false
replicas: 0
volumeClaimTemplates:
- name: data
spec:
storageClassName: standard
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 1Gi

Start a cluster

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

kbcli cluster start mysql-cluster

Option 2. Create an OpsRequest

Run the command below to start a cluster.

kubectl apply -f - <<EOF
apiVersion: apps.kubeblocks.io/v1alpha1
kind: OpsRequest
metadata:
name: mysql-cluster
generateName: start-
spec:
# cluster ref
clusterRef: mysql-cluster
type: Start
EOF

Option 3. Change the YAML file of the cluster

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

apiVersion: apps.kubeblocks.io/v1alpha1
kind: Cluster
metadata:
name: mysql-cluster
spec:
clusterDefinitionRef: apecloud-mysql
clusterVersionRef: ac-mysql-8.0.30
terminationPolicy: WipeOut
componentSpecs:
- name: mysql
componentDefRef: mysql
monitor: false
replicas: 3
volumeClaimTemplates:
- name: data
spec:
storageClassName: standard
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 1Gi