Our Health Check Failed and the Deploy Went Live Anyway
A postmortem from our own dogfood run: a failed readiness probe still received traffic. What broke, why two correct parts added up to a bug, and the fix.
Author
Gagan Deep Singh
Builds Levelrail at GLINCKER and writes these guides. Every tutorial is run end to end on a real server, and each post says which version and date it was tested on.
Posts by Gagan Deep Singh
Roll Back a Failed Docker Deploy Without Downtime
Ship a broken release on purpose, watch your users stay on the old version, then roll back with one command. Real commands, real output, self-hosted.
Install a Self-Hosted PaaS on Your Own Server in Five Minutes
One curl command, one setup token, one sample app. The full Levelrail install on a fresh Linux server, with the checks and the fixes.
Restart a Docker Container Without Downtime
Restart a Docker app with one command and zero failed requests, then see what a plain stop and start costs. Real output from a self-hosted run.
Update the PHP Docker Image Security Patch, No Downtime
Move a Dockerized PHP app from 8.4.26 to the 8.4.27 security release with zero failed requests, pin the image by digest, and see a bad update get refused.
Docker Container Restarting in a Loop: 5 Causes, Fixed
Five real reasons a Docker container keeps restarting, each reproduced with its exit code, the command that finds it and the fix. Then the same crash on Levelrail.
Node Graceful Shutdown in Docker: Handle SIGTERM on Deploy
Why docker stop takes 10 seconds on a Node app and resets in-flight requests, and the handler that fixes it. Measured exit codes, timings and deploy runs.
Run it on your own server
One command installs the control plane. Apache 2.0, no license key.
Install Levelrail