sure: new chart for the we-promise Sure app (1.0.0+up0.7.4) #36

Merged

jklein merged 3 commits from feat/sure-chart into main 2026-09-26 23:08:56 +02:00

Conversation 1 Commits 3 Files Changed 21

+1692 -3

3 Commits

Author	SHA1	Message	Date
jklein	ee62607e2e	sure: fix the readiness probe, the ephemeral-storage budget and HOME ... Second install-test run, three findings, all measured: - Readiness on "/" failed with "http: server gave HTTP response to HTTPS client" on a pod that was answering correctly. The kubelet's HTTP prober follows redirects to the same host, and with RAILS_ASSUME_SSL=true the app builds its redirect as https://<pod-ip>:3000/registration/new, which Puma does not speak. The probe now runs curl without -L and accepts 2xx-3xx itself. The same log also proves what the probe is for: against an empty database the redirect target was /registration/new, the branch User.count decides, so the path really does reach Postgres. - The pod was evicted within two minutes of every start: "ephemeral local storage usage exceeds the total limit of containers 60Mi". emptyDirs and the stdout log both count there, and the image rebuilds its Bootsnap cache under /rails/tmp on every start because the emptyDir hides the one baked into the image. The request is now 256Mi (limit 768Mi) per app container - headroom, not a measurement. - /home/rails is read-only, so Bundler created a throwaway home under TMPDIR on every invocation, worker probe included. HOME now points at a directory the init container creates. The CI postgres fixture gets -d sure on its readiness probe, so the server stops logging a missing database that nothing asked for.	2026-09-22 20:43:53 +00:00
jklein	e92286b420	sure: give Ruby a temporary directory it accepts ... The first install-test run failed with both containers crash-looping during boot: system temporary path is world-writable: /tmp /tmp is world-writable: /tmp . is not writable: /rails ArgumentError: could not find a temporary directory raised from MiniMagick, which Active Storage loads while Rails boots. Ruby's Dir.tmpdir skips a candidate that is world-writable without a sticky bit, and a Kubernetes emptyDir is created mode 0777 with no sticky bit - so with a read-only root filesystem there was no candidate left. A tiny init container, the app's own image running as the same non-root uid and with no capability added, now creates one private subdirectory (mode 0700) inside each tmp emptyDir, and both containers run with TMPDIR pointing at it. Creating an entry in a 0777 directory and chmod'ing what one just created needs no privilege, so the hardening standard holds unchanged.	2026-09-22 20:19:16 +00:00
jklein	0b36d91275	sure: new chart for the we-promise Sure app (1.0.0+up0.7.4) ... One StatefulSet with two containers - the Puma web process and a Sidekiq worker - sharing one ReadWriteOnce PVC at /rails/storage. That shared volume is the reason they live in one pod: splitting them would need an RWX volume. Only the web container migrates, because the image entrypoint runs db:prepare solely for the './bin/rails server' command; the worker is started through args: so the entrypoint (and its jemalloc preload) stays in place and the two can never race. Probes are chosen for what they prove: liveness and startup use Rails' /up, which is a boot check and touches no database, while readiness uses '/', which runs User.count through authenticate_user! in self-hosted mode and therefore fails while Postgres is unreachable. The worker speaks no HTTP, so all three of its probes ask sidekiqmon whether this pod still holds a Sidekiq heartbeat in Redis. Three OnePasswordItem CRs (app, database, redis), ingress.domain kept required outside the Ingress because APP_DOMAIN and the WebAuthn relying party read it, strict values.schema.json, CI fixtures with throwaway Postgres 16 and Redis, and a Renovate manager on semver so the -alpha/-rc/-hotfix channel and the moving tags are never selected.	2026-09-22 19:54:00 +00:00