Updates to Docker Support Policy for CCE Clusters

Released: Nov 20, 2025

Kubernetes community has removed dockershim from clusters v1.24, in which the Docker container runtimes are no longer supported. Given that some users are still using Docker, CCE will continue to support Docker through v1.33. To align with the community's technical roadmap and enhance cluster stability and resource efficiency, CCE has updated its container runtime support policy as follows:

• New CCE clusters of Kubernetes v1.34 and later will not support the Docker container runtimes.
• Existing CCE clusters upgraded to Kubernetes v1.34 will continue to run Docker normally. However, when creating new nodes or node pools, you are advised to use containerd. Additionally, clusters must migrate from Docker to containerd before upgrading to v1.35, as Docker will not be supported in v1.35 and later versions.

The more lightweight, secure containerd container runtimes are recommended. If you have containers that use the Docker container runtimes, you can migrate their container runtimes to containerd. For details, see Migrating Nodes from Docker to containerd.

For details about the differences between containerd and Docker, see Container Runtimes.