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    Container Service for Kubernetes:Hot migrate a Basic Edition ACK Serverless cluster to the Pro Edition

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    Container Service for Kubernetes:Hot migrate a Basic Edition ACK Serverless cluster to the Pro Edition

    Last Updated:Feb 28, 2026

    Migrate an ACK Serverless Basic cluster to an ACK Serverless Pro cluster without service interruption.

    Warning

    This migration is one-way only. After you migrate a cluster from Basic to Pro, you cannot migrate it back to Basic.

    Overview

    ACK Serverless Pro clusters build on ACK Serverless Basic clusters and deliver higher reliability and security for enterprise users in large-scale production environments. ACK Serverless Pro clusters are covered by service-level agreements (SLAs) that include compensation clauses. For more information, see ACK Serverless Pro cluster overview.

    The migration consists of two phases:

    1. Precheck -- The system validates that the cluster is eligible for migration.

      • If the precheck fails, review the error report, fix the issues, and run the precheck again.

      • If the precheck passes, you can proceed with the migration.

    2. Migration -- The cluster is migrated from Basic to Pro. Running services are not interrupted.

    Important

    The ACK Serverless Basic cluster must run Kubernetes version 1.16 or later. Earlier versions do not support hot migration.

    Impact

    Services are not interrupted during the migration. We recommend that you perform the migration during off-peak hours to minimize risk.

    Prerequisites

    Before you begin, ensure that you have:

    • An ACK Serverless Basic cluster running Kubernetes version 1.16 or later

    • Access to the ACK console

    Procedure

    1. Log on to the ACK console. In the left-side navigation pane, click Clusters.

    2. On the Clusters page, find the target ACK Serverless Basic cluster and click Migrate to Pro in the Actions column.

    3. In the Migrate to Pro dialog box, click precheck.

      The page redirects to the Migration Check page in the Container Intelligence Service console.

    4. 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, click Details on the Migration Check page to view the failure report.

    5. After the cluster passes the precheck, return to the Migrate to Pro dialog box in the ACK console and click OK.

    Verify the result

    After the migration is complete, go to the Clusters page in the ACK console. The cluster type for the migrated cluster changes from ACK Serverless Basic cluster to ACK Serverless Pro cluster.

    References