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cc-ci/machine-docs/BACKLOG-2pc.md
autonomic-bot 16d177e73a feat(2pc): PC1 conservative prune — drop autoPrune --all, add gated surgical docker-prune 
Removes virtualisation.docker.autoPrune (daily `docker system prune --all` evicted in-use base
images → cold re-pull → Hub rate-limit churn, JOURNAL-2). Adds modules/docker-prune.nix: daily
timer + oneshot that prunes only dangling+until=24h, gated on disk pressure (>=80%) AND no run-app
live AND no swarm service converging; never --all, never --volumes. Teardown unchanged (never
removes images). Registry pull-through cache dropped per operator scope correction.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-05-29 09:30:07 +01:00

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BACKLOG — Phase 2pc (sane image-prune policy)

SSOT: /srv/cc-ci/cc-ci-plan/plan-phase2pc-image-cache.md. Scope (post operator correction 2026-05-29): PC1 prune policy + confirm local-store retention/auth ONLY. The registry:2 pull-through cache is dropped (deferred to IDEAS / Phase 2b — revisit only if multi-node OR a measured cold-deploy bottleneck on recreate-surviving storage).

Build backlog

  • PC1 — Conservative prune policy. Remove virtualisation.docker.autoPrune (--all evicts in-use base images → forced cold re-pull → rate-limit). Replace with a surgical, gated prune: dangling + until=24h only, NEVER --all/--volumes; gated on (a) genuine disk pressure (/ ≥ 80%), (b) no run-app stack live, (c) no swarm service converging (mid-pull). Teardown already removes only services/volumes/secrets/.env — NOT images (verified) — keep it that way.
  • PC2 — Confirm local cache retained + authenticated. Daemon stays PAT-authenticated (docker info Username=nptest2, sops dockerhub_auth → /root/.docker/config.json); local image store /var/lib/docker persists across runs/teardowns/reboots. No code change expected — confirm + document.
  • PC3 — Verify + document. Deploy → teardown → redeploy reuses local layers (no re-download); disk bounded without -af. Update docs/runbook.md + docs/ prune note; record the policy + the dropped-registry-cache deviation in DECISIONS.md.

Adversary findings

(Adversary owns this section.)