This topic describes the OS images supported by Container Service for Kubernetes (ACK) and the limits on OS images. This topic also describes the limits on OS images for the instance types of nodes.
OS images supported by ACK
When you create an ACK cluster or a node pool, you must select an OS image for nodes. By default, ACK provides only the latest versions of different OS image types. The following table describes the OS images supported by ACK and the Kubernetes versions supported by each image.
The following image list is maintained by ACK and may be different from the latest versions of images supported by Elastic Compute Service (ECS) due to update delays. We recommend that you use the OS images in the following table to deploy nodes.
Image type | Image name (including the image version) | Image ID | OS | Architecture | Startup mode | OS size | Supported Kubernetes version |
Alibaba Cloud Linux 2 | Alibaba Cloud Linux 2.1903 LTS 64 bit | aliyun_2_1903_x64_20G_alibase_20221102.vhd | Aliyun | x86_64 | BIOS | 20 GiB | All versions |
Alibaba Cloud Linux 3 | Alibaba Cloud Linux 3.2104 LTS 64 bit | aliyun_3_x64_20G_alibase_20221102.vhd | Aliyun | x86_64 | BIOS | 20 GiB | 1.18.8 and later |
Alibaba Cloud Linux 3 for ARM | Alibaba Cloud Linux 3.2104 LTS 64 bit ARM Edition | aliyun_3_arm64_20G_alibase_20220225.vhd | Aliyun | arm64 | UEFI | 20 GiB | 1.20.4 and later |
Alibaba Cloud Linux UEFI 2 | Alibaba Cloud Linux UEFI 2.1903 LTS 64 bit | aliyun_2_1903_x64_20G_uefi_alibase_20210218.vhd | Aliyun | x86_64 | UEFI | 20 GiB | 1.16.9 and later |
ContainerOS | ContainerOS 1.24.6 | lifsea_3_x64_10G_k8s_1_24_6_alibase_20221101.vhd | Aliyun | x86_64 | BIOS | 20 GiB | 1.20.4 and later |
CentOS | CentOS 7.9 64 bit | centos_7_9_x64_20G_alibase_20220824.vhd | CentOS | x86_64 | BIOS | 20 GiB | All versions |
Windows | Windows Server 2019 (20211217) | win2019_1809_x64_dtc_en-us_40G_container_alibase_20211217.vhd | WindowsServer2019 | x86_64 | BIOS | 40 GiB | 1.18.8 and later |
Windows Core | Windows Server Core, version 2004 (20211217) | wincore_2004_x64_dtc_en-us_40G_container_alibase_20211217.vhd | WindowsServer2019 | x86_64 | BIOS | 40 GiB | 1.18.8 and later |
Limits on OS images
OS images that are not supported by all instance types of nodes are automatically filtered out. If you use multiple instance types, only the OS images that are supported by all instance types are available.
You cannot use Windows images in the following scenarios:
Your cluster uses managed node pools.
Your cluster uses the Terway network plug-in.
You can use only Alibaba Cloud Linux images in the following scenarios:
Your cluster uses the Terway-Eniip network plug-in and IPVLAN is selected.
The container runtime is Sandboxed-Container.
You want to create an ACK managed cluster for confidential computing.
You select multiple instance types, including instance types that use the NPU architecture.
In scenarios where managed node pools and the containerd container runtime are used, you can use only ContainerOS images.
You cannot use Windows images when you create an ACK managed cluster.
Alibaba Cloud Linux 3 for ARM images support only instance types that use the ARM architecture.
Custom images do not support automatic repair for managed node pools or OS updates during node pool updates.