Container Service for Kubernetes (ACK) supports hot migration from ACK Serverless basic clusters to ACK Serverless Pro clusters. You can dynamically migrate your workloads from existing ACK Serverless Basic clusters to ACK Serverless Pro clusters. This way, you can benefit from the features that are provided by ACK Serverless Pro clusters. This topic describes how to migrate workloads from an ACK Serverless Basic cluster to an ACK Serverless Pro cluster.
Background information
ACK Serverless Pro clusters are developed based on ACK Serverless Basic clusters and provide higher reliability and security in large-scale production environments for enterprise users. ACK Serverless Pro clusters are also covered by service-level agreements (SLAs) that include compensation clauses. For more information, see ACK Serverless Pro cluster overview.
Usage notes
You can perform hot migration from an ACK Serverless Basic cluster to an ACK Serverless Pro cluster only if the Kubernetes version of the ACK Serverless Basic cluster is 1.16 or later.
You cannot migrate workloads from an ACK Serverless Pro cluster to an ACK Serverless Basic cluster.
Workflow
The migration of workloads from an ACK Serverless Basic cluster to an ACK Serverless Pro cluster involves two steps: cluster precheck and migration.
An ACK Serverless Basic cluster must pass a precheck before the migration can be started.
If the cluster fails the precheck, you can view the error report and fix the errors based on the report details.
If the cluster passes the precheck, the migration process starts.
Impact
Your services are not interrupted during the migration. We recommend that you perform the migration during off-peak hours.
Procedure
Log on to the ACK console. In the left-side navigation pane, click Clusters.
On the Clusters page, find the ACK Serverless Basic cluster that you want to manage and click Migrate to Pro in the Actions column.
In the Migrate to Pro dialog box, click precheck.
After you click precheck, you are redirected to the Migration Check page in the Container Intelligence Service console.
On the Migration Check page, click Start. In the Migration Check panel, read and select Warning, and then click Start.
If the cluster fails the precheck, you can click Details on the Migration Check page to view further information about the failure.
After the cluster passes the precheck, return to the Migrate to Pro dialog box in the ACK console and click OK.
After the migration is complete, the cluster type changes from ACK Serverless Basic cluster to ACK Serverless Pro cluster on the Clusters page of the ACK console.