molecule-core/tests/harness/cf-proxy/Dockerfile
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fix(harness): bake cf-proxy nginx.conf at build time, not via configs:
The previous configs:-based fix (87b971a2) didn't actually fix the DinD
issue — Compose v2 falls back to bind mounts for `configs:` when swarm
mode is not active, so the resulting runc invocation still tries to
mount /workspace/.../cf-proxy/nginx.conf from the OUTER host filesystem
that the act_runner-vs-host-docker socket-mount can't see. Same
"not a directory" error returned.

Switch to a thin Dockerfile (cf-proxy/Dockerfile) that COPYs nginx.conf
into nginx:1.27-alpine. The build context is uploaded to the daemon as
a tarball, not bind-mounted from the host filesystem, so the path
translation gap doesn't apply. Verified locally: `docker build` +
`docker run cf-proxy nginx -T` reproduces the baked config end-to-end.

Trade-off: ~2-3s build cost on every harness up. Acceptable for the
Gitea CI gate; local-dev re-builds the image only when nginx.conf
changes (Docker layer cache).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-07 17:09:08 -07:00

15 lines
743 B
Docker

# cf-proxy harness image — nginx + the harness's tenant-routing config baked
# in at build time.
#
# Why bake (not bind-mount): on Gitea Actions / act_runner, the runner is a
# container talking to the OUTER docker daemon over the host socket; runc
# resolves bind-mount source paths on the outer host filesystem, where the
# repo at `/workspace/.../tests/harness/cf-proxy/nginx.conf` is invisible.
# Compose `configs:` (with `file:`) falls back to bind mounts when swarm is
# not active, so it hits the same gap. A build-time COPY uploads the file
# as part of the docker build context — the daemon receives the tarball
# directly and never bind-mounts. See issue #88 item 2.
FROM nginx:1.27-alpine
COPY nginx.conf /etc/nginx/nginx.conf