chore(ci): lower self-hosted earthly cache_size_pct 50 → 20#1867
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scottbuckel wants to merge 3 commits into
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chore(ci): lower self-hosted earthly cache_size_pct 50 → 20#1867scottbuckel wants to merge 3 commits into
scottbuckel wants to merge 3 commits into
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At 50 the shared earthly-buildkitd cache on the self-hosted runner host is allowed ~850 GB of the 1.7 TB disk and was observed at 889 GB with the disk at 99%, failing jobs with "No space left on device". 20 targets ~340 GB. Lockstep with shieldedtech/shielded-iac#1818 — cache_size_pct is an earthly settings-hash key and must stay byte-identical between this file and the host-level config on the runner, or CI jobs restart the shared buildkitd and cancel concurrent builds. Assisted-by: Claude:claude-fable-5 Signed-off-by: Scott Buckel <scott.buckel@shielded.io>
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ozgb
previously approved these changes
Jul 13, 2026
gilescope
previously approved these changes
Jul 13, 2026
gilescope
enabled auto-merge
July 13, 2026 15:22
Signed-off-by: Giles Cope <gilescope@gmail.com>
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approved these changes
Jul 13, 2026
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Overview
Lowers
cache_size_pctin.earthly/config.selfhosted.ymlfrom 50 to 20. At 50, the shared earthly-buildkitd on the self-hosted runner host (fsn1-runner-01, 1.7 TB disk) is allowed ~850 GB of cache and was observed at 889 GB with the disk at 99% (2026-07-13), failing CI jobs with "No space left on device". 20 targets ~340 GB, leaving headroom for CI images and the local GHA cache server on the shared disk.cache_size_pctis an earthly settings-hash key shared with the host-level config the SRE ansible role writes on the runner. The twoglobalblocks must stay byte-identical or every earthly invocation restarts the shared buildkitd and cancels concurrent builds mid-run. SRE will converge the host right after both PRs merge; the hash change restarts the shared buildkitd once.🗹 TODO before merging
📌 Submission Checklist
git commit -s) for the DCO🧪 Testing Evidence
Config-only change to the self-hosted earthly config. Verified the resulting
globalblock stays byte-identical to the host-level config in shieldedtech/shielded-iac#1815 (settings-hash parity). Buildkit cache behaviour at the new cap is enforced lazily by the daemon after the host converges.🔱 Fork Strategy