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DevOps

DevOps tutorials for people who want an app to run the same way on every machine, not only on the one it was written on. Learn what each command does before you trust it. A copied command runs just as happily when it is wrong.

Any category Programming32 Python 7 JavaScript 10 TypeScript 6 SQL 5 HTML and CSS 4 DevOps4 Docker 4
Any topics Deployment and Containers 32 Packaging and Dependencies 1 Performance Optimization 3 Security 7 Testing and Debugging 4
Any level Beginner 2 Intermediate 1 Advanced 1
DevOps Testing and Debugging Clear filters 4 results
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Fix Docker Desktop Stuck on Starting

Check virtualization, WSL, the docker-desktop distribution, the engine context and memory in the order that finds the cause fastest. After this, you can get a stuck Docker Desktop running without resetting it.

4 min read
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Read Logs From a Container That Just Exited

Find a stopped container, read its exit code and log, and tell a crash from a kill. After this, you can see why a container stopped in under a minute.

3 min read
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Wait for a Dependency With a Healthcheck

Add a pg_isready health check to a database and make the app wait for it with service_healthy. After this, you can stop an app from failing on a database that is still starting.

3 min read
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Add a HEALTHCHECK That Actually Fails

Break an app on purpose and compare three health checks, then put the one that works in the Dockerfile. After this, unhealthy means the app is broken, not the check.

5 min read