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Expand volume

You can expand the storage volume size of each pod.

note

Volume expansion triggers pod restart, all pods restart in the order of learner -> follower -> leader and the leader pod may change after the operation.

Before you start​

Check whether the cluster status is Running. Otherwise, the following operations may fail.

kbcli cluster list mysql-cluster
>
NAME                 NAMESPACE        CLUSTER-DEFINITION        VERSION                TERMINATION-POLICY        STATUS         CREATED-TIME
mysql-cluster        default          apecloud-mysql            ac-mysql-8.0.30        Delete                    Running        Jan 29,2023 14:29 UTC+0800

Steps​

  1. Change configuration.

    Configure the values of --components, --volume-claim-templates, and --storage, and run the command below to expand the volume.

    kbcli cluster volume-expand mysql-cluster --components="mysql" \
    --volume-claim-templates="data" --storage="2Gi"
    • --components describes the component name for volume expansion.
    • --volume-claim-templates describes the VolumeClaimTemplate names in components.
    • --storage describes the volume storage size.

  1. Validate the volume expansion operation.

    kbcli cluster list mysql-cluster
    >
    NAME                 NAMESPACE        CLUSTER-DEFINITION        VERSION                  TERMINATION-POLICY        STATUS          CREATED-TIME
    mysql-cluster        default          apecloud-mysql            ac-mysql-8.0.30          Delete                    Updating        Jan 29,2023 14:35 UTC+0800
    • STATUS=Updating: it means the volume expansion is in progress.
    • STATUS=Running: it means the volume expansion operation has been applied.

  2. Check whether the corresponding resources change.

    kbcli cluster describe mysql-cluster