Docker Engine 26.1 release notes

This page describes the latest changes, additions, known issues, and fixes for Docker Engine version 26.1.

For more information about:

• Deprecated and removed features, see Deprecated Engine Features.
• Changes to the Engine API, see Engine API version history.

26.1.0

For a full list of pull requests and changes in this release, refer to the relevant GitHub milestones:

• docker/cli, 26.1.0 milestone
• moby/moby, 26.1.0 milestone
• Deprecated and removed features, see Deprecated Features.
• Changes to the Engine API, see API version history.

New

• Added configurable OpenTelemetry utilities and basic instrumentation to commands. For more information, see OpenTelemetry for the Docker CLI. docker/cli#4889

Bug fixes and enhancements

• Native Windows containers are configured with an internal DNS server for container name resolution, and external DNS servers for other lookups. Not all resolvers, including nslookup, fall back to the external resolvers when they get a SERVFAIL answer from the internal server. So, the internal DNS server can now be configured to forward requests to the external resolvers, by setting a feature option in the daemon.json file:

  {
    "features": {
      "windows-dns-proxy": true
    }
  }

  moby/moby#47584

  Note

  • This will be the new default behavior in Docker Engine 27.0.
  • The windows-dns-proxy feature flag will be removed in a future release.

• Swarm: Fix Subpath not being passed to the container config. moby/moby#47711

• Classic builder: Fix cache miss on WORKDIR <directory>/ build step (directory with a trailing slash). moby/moby#47723

• containerd image store: Fix docker images failing when any image in the store has unexpected target. moby/moby#47738