To use the features of ACK Pro clusters when you have only ACK Basic clusters, Container Service for Kubernetes (ACK) allows you to perform a hot migration to dynamically migrate from ACK Basic clusters to ACK Pro clusters. This topic describes how to migrate from ACK Basic clusters to ACK Pro clusters.
Background information
ACK Pro clusters are developed based on ACK Basic clusters for large-scale production, which provide enhanced security and reliability and are covered by SLAs that include compensation clauses. For more information, see Overview of ACK Pro clusters.
Precautions
To perform a hot migration from ACK Basic clusters to ACK Pro clusters, make sure that the clusters run Kubernetes 1.18 or later.
You cannot migrate from ACK Pro clusters to ACK Basic clusters.
Migration workflow
The entire workflow consists of two steps: cluster migration precheck and cluster migration.
An ACK Basic cluster must pass the migration precheck before it can be migrated to an ACK Pro cluster.
If the cluster fails to pass the precheck, you can follow the instructions to go to the details page and view further information about the failure.
If the cluster passes the precheck, the migration starts.
Procedure
Log on to the ACK console.
In the left-side navigation pane of the ACK console, click Clusters.
On the Clusters page, find the ACK Basic cluster to be migrated and choose in the Actions column.
In the dialog box that appears, click Precheck.
After you click Precheck, you are redirected to the Container Intelligent Service (CIS) console. CIS then runs a precheck on the cluster. If the cluster fails to pass the precheck, you can follow the instructions on the Migration Check page to view further information about the failure.
After the cluster passes the precheck, read Notes in the dialog box and click OK.
After the migration is completed, you can find that the Type column of the ACK Basic cluster on the cluster page changes from ACK Basic to ACK Pro.
References
Hot migration from ACK dedicated clusters to ACK Pro clusters