The deploy failed after the build, the migrations and the browser gate:
"Port 3002 is already in use". The holder was `epicnext-cms`, a compose
replica of release 6bffc537 that the daily scripts/docker-update.sh cron
had recreated at 03:30 with restart=unless-stopped. nginx serves the green
slot on 3003, so that replica was squatting the blue slot the next
candidate needed, and live traffic never noticed.
It got there because the updater's CI-ownership guard only tested
epicnext-cms-app. After a cutover to the green slot that container is
stopped, renamed and deleted, so the guard stopped firing while the host
stayed CI-managed.
- scripts/docker-update.sh: refuse a compose deployment on a CI host by
checking both slot containers and the nginx upstream, which is the only
thing that still marks the host as blue/green while a slot is idle.
- scripts/ci-deploy.sh: retire a compose replica of this checkout from
the candidate port before starting the candidate, so a stray replica
can never block a release again. Never a slot container, never the port
nginx serves; anything else still fails loudly in assert_port_free.
- Tests cover both directions: a squatting replica is removed and the
release lands, a replica on the live port is left alone.
The port-conflict guard added in the previous commit made the six existing
blue/green deployment simulation tests fail. assert_port_free() shells out to
ss, and the simulation harness stubs git, curl, docker, nginx, pnpm and node —
but not ss. Because the runner is self-hosted and the containers use
--net=host, the simulation saw the production CMS containers holding 3002 and
3003 and refused to start its own candidate.
The harness now stubs ss. It reports no listener for every scenario except
'port-taken', which reserves whichever port the script asks about, so the
simulation stays independent of the host it runs on.
Also switched the ss probe from `command -v ss` to `type ss`. The stub is a
shell function delivered through BASH_ENV; `command -v` happens to find it,
but `type` is the reliable test for "is this resolvable", and the two differ
across shells.
Added a regression test for the guard itself: with the candidate port already
occupied, the deploy must fail, must not have run `docker run`, and must leave
the nginx upstream untouched on the old port — no half-finished cutover.
Verified it fails when the assert_port_free call is removed.
Deploy simulation: 26 passed. Full unit suite: 3316 passed, 12 skipped.
Drop the leftover Playwright browser install and e2e smoke test from the deployment script, and update the deployment contract tests to cover the verify-deployed-release smoke check instead.
openhands
Simo