Phase 4 of PRD 0015. End-to-end test against real Docker:
- Brings up a real pipelock sidecar via the production
DockerPipelockProxy bring-up + pipelock_tls_init.
- Calls apply_allowlist_change to add a new host.
- Polls the live /etc/pipelock.yaml until the new host shows up
(bridging the docker-restart window).
- Verifies api_allowlist contains both old + new hosts and
tls_interception block is preserved.
- Smaller cases: invalid hostname raises, missing sidecar raises,
fetch_current_allowlist returns one-per-line format.
Skipped under GITEA_ACTIONS because pipelock_tls_init bind-mounts a
host path that doesn't share fs in the runner, matching the
existing pipelock smoke test's skip pattern.
Drive-by fix: fetch_current_yaml now uses `docker cp` (daemon-API
tarball copy) instead of `docker exec cat` because the pipelock
image is distroless and has no shell utilities.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
