This topic provides the release notes for the OS images supported by Container Service for Kubernetes (ACK).

Usage notes

ACK supports the Alibaba Cloud Linux 2, Alibaba Cloud Linux 3, CentOS 7.X, and ContainerOS operating systems. Alibaba Cloud Linux 2 is maintained by Alibaba Cloud. Alibaba Cloud provides long-term technical support and patching for vulnerabilities related to Alibaba Cloud Linux 2. Alibaba Cloud Linux 2 is compatible with CentOS 7 and provides more features, improved performance, and higher stability. We recommend that you install Alibaba Cloud Linux 2 on the nodes of your ACK cluster. For more information about Alibaba Cloud Linux 2, see Use Alibaba Cloud Linux 2.

When you install Alibaba Cloud Linux 3, make sure that the following components are installed and the version of your cluster meets the following requirement.

Component or cluster Minimum version
Cluster 1.20.4
ACK NodeLocal DNSCache 1.5.0
Flannel v0.13.0.1-466064b-aliyun
Terway v1.0.10.390-g5f3c461-aliyun

Release notes

December 2021

OS OS version Kernel version Release date Description
Alibaba Cloud Linux 3.2104 aliyun_3_x64_20G_alibase_20210425.vhd 5.10.23-5.al8.x86_64 2021-12-20 For more information, see Release notes for Alibaba Cloud Linux 3.

November 2021

OS OS version Kernel version Release date Description
ContainerOS 1.20.11 lifsea_3_x64_10G_k8s_1_20_11_alibase_20211103.vhd 5.10.23-5.8.lifsea8.x86_64 2021-11-06 Key component versions:
  • Kubelet : 1.20.11
  • Containerd: 1.4.8

October 2021

OS OS version Kernel version Release date Description
ContainerOS 1.20.4 lifsea_3_x64_10G_k8s_1_20_4_alibase_20210917.vhd 5.10.23-5.8.lifsea8.x86_64 2021-10-15
  • The ContainerOS base image is released.
  • Key component versions:
    • kubelet: 1.20.4
    • containerd: 1.4.8
  • Kernel description:
    • The image is based on the 5.10 kernel version of the Alibaba Cloud Linux 3.2104 64-bit image. The 5.10.23-5.8.lifsea8.x86_64 kernel version is used by the base image.
    • initramfs is removed to accelerate startup.
    • Some required kernel modules are compiled as built-in modules.
Note The ContainerOS image is supported by all instance families, except Elastic Compute Service (ECS) bare metal instances and heterogeneous computing instances.

August 2021

OS version Kernel version Release date Description
aliyun_2_1903_x64_20G_alibase_20210726.vhd 4.19.91-24.1.al7.x86_64 2021-08-20 For more information, see Release notes.

April 2021

OS version Kernel version Release date Description
aliyun_2_1903_x64_20G_alibase_20210325.vhd 4.19.91-23.al7.x86_64 2021-04-19 For more information, see Release notes.
centos_7_9_x64_20G_alibase_20210318.vhd 3.10.0-1160.15.2.el7.x86_64 2021-04-19 For more information, see Release notes.

March 2021

OS version Kernel version Release date Description
centos_7_9_x64_20G_alibase_20210128.vhd 3.10.0-1160.11.1.el7.x86_64 2021-03-03 For more information, see Release notes.

January 2021

OS version Kernel version Release date Description
aliyun_2_1903_x64_20G_alibase_20210120.vhd kernel-4.19.91-22.2.al7 2021-01-27 For more information, see Release notes.

December 2020

OS version Kernel version Release date Description
centos_7_8_x64_20G_alibase_20200914.vhd 3.10.0-1127.19.1.el7.x86_64 2020-12-22 For more information, see Release notes.

October 2020

OS version Kernel version Release date Description
aliyun_2_1903_x64_20G_alibase_20200904.vhd 4.19.91-21.al7.x86_64 2020-10-20 For more information, see Release notes.

July 2020

OS version Kernel version Release date Description
aliyun_2_1903_x64_20G_alibase_20200529.vhd 4.19.91-19.1.al7.x86_64 2020-07-06 For more information, see Release notes.
centos_7_7_x64_20G_alibase_20200426.vhd 3.10.0-1062.18.1.el7.x86_64 2020-07-06 For more information, see Release notes.