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kevinveenbirkenbachandClaude Opus 5
f3963dcbdd
An over-declared min_storage makes a host look too small: it feeds the storage guard, the runner packer and the sufficient-storage filter, so a deploy that would have fit prunes a cache it did not need to lose. Nothing checked the declared number against reality. The new external test measures what a pull of the service's own image:version actually transfers - config blob plus every layer blob, resolved for linux/amd64 - and fails when min_storage exceeds it by more than 1GB. A service whose data volume genuinely dominates keeps its value by carrying '# nocheck: min-storage-headroom' together with a 'Reason:', the same two-marker shape meta/volumes.yml already uses for nfs: false. Sizes come from the repo's own registry client rather than 'docker buildx imagetools': make test-external runs inside the compose container, which has no docker socket. manifest_transfer_size reuses the existing bearer-challenge flow, keeps the tri-state contract of manifest_exists (an indeterminate registry warns instead of failing), and resolves a multi-platform index to its amd64 manifest - the case a raw jq over '.layers' would miss entirely. Distinct image refs are measured concurrently through resolve_max_fetch_workers(). A min_storage that parses out of the YAML but cannot be located in the file text fails the test, so a declaration can never silently lose its marker resolution. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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