Allow Docker Hub's CloudFront blob CDN - #10
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`docker pull hello-world` in the guest fails: the manifest fetch succeeds, then the layer download is blocked with a proxy 418 and docker reports `error pulling image configuration: download failed after attempts=6`, which reads as a network fault rather than a missing allowlist rule. Docker Hub serves blobs from production.cloudfront.docker.com as well as the Cloudflare R2 bucket already allowed here, and picks per request, so allowing only one of them fails intermittently by design. Observed in .vm/blocked.jsonl as repeated GETs to production.cloudfront.docker.com/registry-v2/docker/registry/v2/blobs/... This is what was failing test_docker_hello_world on every branch — it is unrelated to the guest clock, and it fails in CI too, since CI uses this same allowlist. Adds a TestShippedAllowlist class that checks the real allowlist.txt against the URLs a pull actually requests. The existing filter tests all use synthetic rules, so nothing covered the shipped file, which is where upstream CDN drift shows up. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
jeffreleos
approved these changes
Aug 5, 2026
maravillas
approved these changes
Aug 5, 2026
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Docker seems to use both Cloudflare R2 and CloudFront as CDNs to serve image layers, so allow both.