General Question

Change the replicas

The following example changes replicas to 2.

kubectl patch mysql sample -p '{"spec":{"replicas":2}}' --type=merge

Close the cluster (change the replicas to 0) will not delete the PVC.
The replicas can only be 0/2/3/5.

常用运维操作

更改节点数

以下示例将名为 sample 的集群节点数更改为2。

kubectl patch mysql sample -p '{"spec":{"replicas":2}}' --type=merge

关闭集群（更改节点数为0）不会删除pvc。
节点数只能为0/2/3/5。