ACK Lingjun clusters are Kubernetes clusters developed based on Intelligent Computing LINGJUN with fully-managed and highly-available control planes. In ACK Lingjun clusters, Lingjun nodes serve as worker nodes. As new Kubernetes versions are released, the list of Kubernetes versions supported by ACK Lingjun clusters also changes. This topic describes how ACK Lingjun clusters support different Kubernetes versions.
Release history
The following table describes the Kubernetes versions supported by ACK Lingjun clusters.
Version | Status | Release date | Discontinue date |
Released | November 2023 | Subject to the actual condition of ACK Lingjun clusters. | |
Outdated | April 2023 | November 2023 |
Version updates
Starting from April 2023, ACK Lingjun clusters support only even-numbered Kubernetes minor versions, such as 1.20 and 1.22. ACK Lingjun clusters can run 1.20 or 1.22 after 1.20 or 1.22 is supported by ACK Lingjun. ACK Lingjun clusters update the support for new patch versions after the patch versions are released.
Version description
The Kubernetes versions supported by ACK Lingjun clusters follow the semantic versioning scheme in the x.y.z-aliyun.n format. x.y.z is the open source Kubernetes version. x is the major version, y is the minor version, z is the patch version, and n is the ACK Lingjun patch version. For example, version 1.22.15-aliyun.1 is based on open source Kubernetes 1.22.15. For more information about Kubernetes versions, see Kubernetes Release Versioning.
Rules for supporting Kubernetes versions
Cluster creation
ACK Lingjun supports Kubernetes 1.20 and 1.22 for ACK Lingjun clusters. Currently, 1.22 is the latest version supported by ACK Lingjun clusters. Kubernetes 1.20 is discontinued and you can no longer create clusters of 1.20. In addition, the outdated patch version is no longer available.
Cluster update
You can update your ACK Lingjun cluster from 1.20 to 1.22. You cannot roll back your cluster from 1.22 to 1.20 after it is updated.
For patch versions, ACK Lingjun allows you to update an ACK Lingjun cluster only to the latest patch version.
Technical support
ACK Lingjun provides technical support for 1.22, including consultation, online tutorials, and troubleshooting. Technical support for discontinued Kubernetes versions are gradually phased out by ACK Lingjun clusters.
Outdated Kubernetes versions
Security and stability risks exist in outdated Kubernetes versions. We recommend that you update your clusters that use outdated Kubernetes versions at the earliest opportunity. For ACK Lingjun clusters that run outdated Kubernetes versions, ACK Lingjun does not provide security patches or fix issues, and provides limited technical support.