Two faults compounded into one symptom: with the database unreachable, every
route on the service returned 502 - including /docs, which never touches it.
_connect() passed no connect_timeout. A host that DROPS packets rather than
refusing them, which is what a firewall or a wrong DB_HOST looks like, blocked
until the OS gave up - roughly 130 seconds on Linux. Every caller inherited
that, /api/health included. Now bounded by DB_CONNECT_TIMEOUT_SECONDS,
defaulting to 5. Measured against an unroutable host: /api/health went from
hanging past 25s to answering 200 in 5.07s.
The container healthcheck then probed /api/health, so that hang timed out the
check, the container was marked unhealthy, and the platform stopped routing to
it. That is the part that turned a degraded dependency into a total outage, and
it was introduced with the healthcheck itself.
A healthcheck is a LIVENESS question, because the platform's answer to "no" is
to take the container out of service. It may only ask whether the process is
still serving HTTP. /api/health is a READINESS report - it dials Postgres and
Ollama to say whether they are reachable, and coupling the container's
existence to its dependencies is what made a running API unreachable. It now
probes "/", which is served from memory and does no I/O, so it can fail only if
the app really is gone.
Verified with an unroutable DB host: /, /docs and /openapi.json all answer 200,
and the healthcheck exits 0. With the app stopped it still exits 1.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
/api/upload/nutrition called json.dumps() in a module that never imported
json, so every request to it raised NameError, was swallowed by the broad
except, and came back as "500 Database import failed". Import json.
Persist the three directories the app writes to at runtime. Products added
through the UI are appended to data/seed_catalogs/*.json and retrained models
are written to app/intelligence/artifacts/*.joblib; both live inside the image,
so a redeploy silently discarded them. The paths now come from settings
(DATA_DIR / SEED_CATALOG_DIR / MODEL_ARTIFACTS_DIR) so a volume can be mounted
on them, and catalog_engine.save_catalog resolves against DATA_DIR instead of
a working-directory-relative "data/", which landed somewhere different
depending on where the process was started from.
Mounting those volumes would otherwise have made things worse: Docker seeds a
named volume from the image on first use, but a bind mount starts empty and
just hides what the image shipped. A bind mount on /app/data would have left
the API with no seed catalogs, so the next product added would write a JSON
file containing only that product. The image now keeps pristine copies at
/app/.bundled, and restore_bundled_assets() tops up whatever a freshly mounted
directory is missing at startup without overwriting anything already there.
Configure CORS for the split-domain deployment: the React app is served from
catalogue.nearle.ai.in and calls the API on mcp.catalogue.nearle.ai.in, so the
frontend origin has to be in API_CORS_ORIGINS. A wrong list fails only in the
browser while the server logs a healthy 200, so the effective origins are now
logged at startup with a warning when they are localhost-only.
Fix FRONTEND_DIST, which looked for a sibling "frontend/" directory that is
actually named "catalogue_frontend/", so the single-port unified-serving branch
could never activate even with a build sitting next to it.
Rebuild the Dockerfile on the frontend's multi-stage pattern: dependencies
resolve into a venv in a build stage, the runtime stage copies only that.
Adds PYTHONUNBUFFERED so startup errors reach Dokploy's log pane, a liveness
HEALTHCHECK (/api/health answers 200 even when Postgres is down, so a database
blip cannot restart-loop the container), and an overridable PORT. The CMD execs
uvicorn so SIGTERM reaches it rather than the sh wrapper.
Add "from __future__ import annotations" to ollama_service and image_search,
which used PEP 604 unions in runtime-evaluated signatures and so could not be
imported below Python 3.10.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
