Nspawn 3.0: A Docker-compatible Engine API for systemd-nspawn containers
nspawn 3.0.0 serves the Docker Engine API with its changes. The docker command works with DOCKER_HOST pointed at it, and GitLab Runner’s docker executor runs its jobs on nspawn’s machines.
Quick read
This post announces nspawn 3.0, which implements the Docker Engine API so Docker clients and tools can manage systemd-nspawn containers. Someone would visit to learn how to use Docker-compatible tools (docker CLI, GitLab Runner) with nspawn and how the API socket and permissions behave.
- Docker Engine API available at /run/nspawn/api.sock
- Use docker CLI or GitLab Runner against nspawn machines
- Socket supports read-write or read-only mounts with polkit rules
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