enricobuehler
693eedd314
The hourly docker-prune could never reclaim the real disk filler: the act_runner cache server's blob store (cache.dir:"" -> /root/.cache/actcache/cache) lives in the long-running runner container's WRITABLE LAYER, which docker prune can't see. It grew to ~66 GB and filled the 125 GB disk on its own. - New docker-prune.sh holds the logic (inline ExecStart= broke under systemd's own $-expansion, which emptied $SZ/$(...) before sh ran them — silently no-oping the burst guard). The unit now just calls the script. - Caps the actcache: clears the blobs once they exceed ~20 GB (act_runner repopulates; keys are content-hashed, so only stale entries drop). - Burst guard lowered 85%->80% and now also clears the actcache. - Timer hourly -> every 30 min; image/cache `until` 12h -> 6h. Live: cleared 66 GB on home-runner-1 (93% -> 20%), deployed + verified. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
33 lines
1.7 KiB
Desktop File
33 lines
1.7 KiB
Desktop File
# Docker disk hygiene for the self-hosted Gitea Actions runner (home-runner-1, 192.168.1.52).
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#
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# Why this exists: every CI push builds and sha-<commit>-tags a Docker image per pipeline
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# (rust-ci, web, docs, fedora-rpm, fedora44-rpm, ...). Those tags are never dangling, so a
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# plain `docker image prune` SKIPS them and they accumulate. Host-level, not per-repo CI,
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# because the runner is shared (punktfunk + other orgs all benefit).
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#
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# THE BIG ONE (2026-06-19): the act_runner CACHE SERVER store lives in the long-running runner
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# container's WRITABLE LAYER (HOME/.cache/actcache/cache inside gitea-runner-runner-1,
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# `cache.dir: ""` -> defaults under /root). `docker prune` can NEVER see it — only stopped
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# containers + unused images/cache are prunable, not a 13-day-up container's layer. That store
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# grew to ~66 GB and filled a 125 GB disk on its own. docker-prune.sh caps it by clearing the
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# blobs in-place (act_runner repopulates; keys are content-hashed).
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#
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# The logic is in docker-prune.sh, NOT inline ExecStart=, because systemd does its own
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# $-expansion on ExecStart and would empty the shell vars / $(...) before sh runs them.
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#
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# Install on the runner host (root):
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# install -m755 scripts/ci/docker-prune.sh /usr/local/bin/ci-docker-prune.sh
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# cp scripts/ci/docker-prune.{service,timer} /etc/systemd/system/
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# systemctl daemon-reload && systemctl enable --now docker-prune.timer
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# See also scripts/ci/setup-macos-runner.sh for the macOS runner.
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[Unit]
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Description=Prune aged Docker images/cache + cap the act_runner cache (CI runner disk hygiene)
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Documentation=https://git.unom.io/unom/punktfunk
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Wants=docker.service
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After=docker.service
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[Service]
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Type=oneshot
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ExecStart=/usr/local/bin/ci-docker-prune.sh
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