M78 step 1. The bundled maintenance/docker_prune.yml was a single
`docker system prune -f`; the upcoming per-host prune buttons need a
granular split. Add a `prune_target` extra-var:
- containers → docker container prune -f
- images → docker image prune -f (+ -a when prune_all_images)
- system → docker system prune -f (+ -a / --volumes) — the DEFAULT,
so existing manual/scheduled callers (which set no var)
keep today's behavior.
Reuses the existing bundled playbook rather than adding parallel files;
keeps the description/category/confirm meta so it still self-describes as
a confirm-gated maintenance run. Adds unit coverage: the playbook stays
valid YAML, its meta still discovers, and all three targets are guarded.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CAGR73DUowdVFVvYzLXC5C
Ships a read-only "steward-builtin" source (steward/ansible/bundled/) that
always appears alongside operator-configured sources, with two playbooks:
- maintenance/docker_prune.yml — docker system prune for swarm/standalone
nodes (safe by default; prune_all_images / prune_volumes extra-vars to
widen). Schedule it against a swarm-node group for recurring cleanup (#869).
- host_agent/install.yml — installs/updates the host agent (mirrors
install.sh: user, agent.py, config, hardened systemd unit), parameterised
with steward_url + steward_token extra-vars.
get_sources() now prepends the builtin source. Tests updated to find the
configured git source by name; added coverage that the bundled playbooks are
discoverable.
Tasks #869 + agent-install (milestone #37).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
bvandeusen