Changing Cluster Scale¶
Scenario¶
CCE allows you to change the number of nodes managed in a cluster.
Constraints¶
This function is supported for clusters of v1.15 and later versions.
Starting from v1.15.11, the number of nodes in a cluster can be changed to 2000. The number of nodes in a single master node cannot be changed to 1000 or more.
The number of master nodes cannot be changed when you modify cluster specifications.
Currently, a cluster can only be scaled out to a larger specification, but cannot be scaled in.
During the specifications change, master nodes will be powered off and on, and the cluster cannot run properly. Perform the change during off-peak hours.
Changing the cluster scale does not affect the services running in the cluster. However, the control plane (master nodes) will be interrupted for a short period of time. You are advised not to perform any other operations (such as creating workloads) during the change.
Change failures will trigger a cluster rollback to the normal state. If the rollback fails, submit a service ticket.
Procedure¶
Log in to the CCE console. In the navigation pane, choose Clusters.
Locate the cluster whose specifications need to be modified, click ... to view more operations on the cluster, and choose Specification change.
On the page displayed, select a new cluster scale.
Click Next to confirm the specifications and click OK.
You can click Operation Records in the upper right corner to view the cluster change history. The status changes from Executing to Successful, indicating that the cluster specifications are successfully changed.
Note
After the cluster scale is changed to 1000 nodes or more, some parameter values of the cluster will be automatically adjusted to ensure the cluster performance. For details, see Cluster Configuration Management.