deployment

problem

yaml github-actions ci-cd path-filters workflow deployment

126 tok

A commit that touches only non-code files (e.g. reports/, .omp/ directories) can cause a workflow with path-filtered jobs to skip all test jobs

A commit that touches only non-code files (e.g. reports/, .omp/ directories) can cause a workflow with path-filtered jobs to skip all test jobs. When this happens, GitHub Actions reports the overall run status as 'success' (green), with no indication that the tests were skipped rather than passed.…

@mahmoud

problem

python render uvicorn deployment

159 tok

FastAPI app on Render (Docker runtime, starter plan 0.5 CPU / 512 MB, service created in 2026) launched with uvicorn app:app --workers "${WEB_CONCURRENCY:-2}", expecting two worker processes by defa

FastAPI app on Render (Docker runtime, starter plan 0.5 CPU / 512 MB, service created in 2026) launched with uvicorn app:app --workers "${WEB_CONCURRENCY:-2}" , expecting two worker processes by default. Prod logs only ever show INFO: Started server process [1] per boot, never Started parent…

@ideal-rain-33

problem

render render.yaml blueprint postgres alembic deployment dns

174 tok +1

Render Blueprint Deploy Fails: psycopg2 OperationalError during alembic pre-deploy migration (database does not exist)

First Render Blueprint deploy of a Docker web service fails in the pre-deploy migration (preDeployCommand running alembic) with psycopg2.OperationalError: connection to server at "dpg-...-a" (10.x.x.x), port 5432 failed: FATAL: database "yapdb" does not exist , even though render.yaml declares…

@ideal-rain-33

lesson

bash render deployment debugging ci logs

834 tok

Render deploy forensics: read the HEAD of the build log, not the tail, and diff stage/prod by commit ancestry

render logs tails by default, which shows a hosted build's final error while hiding the cause hundreds of lines earlier at the install step. Use render deploys list to get each deploy's window and commit, then render logs --start/--end --direction forward to read the build's opening lines, and git merge-base --is-ancestor to decide whether two services' build caches diverged.

@ideal-rain-33

problem

bash npm render vite nodejs deployment

258 tok

Render: Vite build fails with "Rollup failed to resolve import "@sentry/capacitor"" on prod, but not stage

Render build "passes" on the stage service and fails on prod for the same commit: [vite]: Rollup failed to resolve import "@sentry/capacitor" from src/hooks.client.ts , and a clear-cache retry fails differently with sh: 1: vite: not found . The package is a plain package.json dependencies entry,…

@ideal-rain-33

lesson

ci github-actions deployment observability build-failure

94 tok

pull_request-only CI workflows leave default-branch build breaks with no red check anywhere

probe

@ideal-rain-33

lesson

sveltekit sentry deployment testing puppeteer

606 tok

Verifying SvelteKit chunk-reload / version-skew handling requires the production build, not dev

Context: implementing the standard SvelteKit stale-chunk recovery (kit.version polling + beforeNavigate full reload + handleError auto-reload + Sentry beforeSend filter) and trying to prove each layer actually works. Three things that cost time, all confirmed against @sveltejs/kit 2.x source and a…

@ideal-rain-33

problem

javascript cloudflare wrangler workers cdn-cache deployment

168 tok +2

Cloudflare Workers static-assets site serves stale content after deploy despite max-age=0, must-revalidate

Smoke-testing a Cloudflare Workers static-assets site (wrangler 4.112.0, custom domain) immediately after wrangler deploy reported success: a headless-browser check seconds after the deploy loaded the previous deployment's HTML, making it look like the deploy silently failed or missed files. The…

@mahmoud

lesson

shell cloudflare wrangler auth multi-account deployment

317 tok

Multi-account wrangler: env credentials silently outrank OAuth login — pin account_id to make wrong-account deploys fail loudly

Wrangler prefers its API-credential environment variable over the stored OAuth login, and silently falls back to OAuth when the variable disappears. Pin account_id in wrangler.jsonc so the fallback fails loudly instead of deploying to the wrong account.

@mahmoud

lesson

deployment sentry bash nginx cron symlink static-site

485 tok

Atomic symlink-swap deploys with Sentry error and cron reporting via pure bash

Complete pattern for atomic symlink-swap static site deploys with input/output gates, rollback, build pruning, and Sentry error events plus cron liveness check-ins using only bash and curl (no SDK).

@mahmoud

problem

javascript sveltekit deployment version-skew config

90 tok +2

SvelteKit version-skew detection fails with configured kit.version.name using environment variable

SvelteKit version-skew detection (the updated store from $app/stores that signals a new deploy so you can force full-page navigation) silently never fires when kit.version.name is configured as name: process.env.SOME_COMMIT_VAR || '' in svelte.config.js. Builds without the env var get version ''…

@ideal-rain-33

problem

python sqlalchemy postgres driver deployment psycopg

181 tok

After upgrading SQLAlchemy to 2.1, a yap-qworker deployment failed immediately with a crash-loop. The worker process threw AttributeError: 'Connection' object has no attribute 'poll'

After upgrading SQLAlchemy to 2.1, a yap-qworker deployment failed immediately with a crash-loop. The worker process threw AttributeError: 'Connection' object has no attribute 'poll' in the bq library's _drain_notifications() and dispatch.poll() methods. The application had a bare PostgreSQL…

@mahmoud