I'm struggling to get Docker to stop using old code when I rebuild my images. I've tried every command and even pruned everything, but it still seems to use cached versions of my images. I just don't understand why cache problems persist; it feels like I've wasted so much time on this. After reviewing everything, I realized that a .dockerignore file created by Claude 4 was causing the issue since it had a ton of ignored files. Once I deleted that file, the problem was solved!
5 Answers
You might want to check out some resources on optimizing Docker images, like the InfoQ article about dissecting Docker images. Understanding the layer composition can help prevent these cache issues in the future.
In my experience, it often comes down to forgetting to push the correct tags after a build. Make sure you’re pushing the right ones to avoid running into old code.
Honestly, if you’re desperate, you could buy a new computer and avoid connecting it to the same network. That's one way to guarantee no old images get used! Just kidding, but seriously take a step back and troubleshoot a bit before going to extremes.
You can use the `--no-cache` flag in your build command to force Docker to rebuild everything from scratch. That's usually the best way to deal with caching issues. Also, keep in mind that if you change or add any files, that should invalidate the cache as well.
It's really simple—make sure you're not saving files in a volume that persist across builds. If those files are old, your container will keep using them after a rebuild, leading to the same frustrating issues.
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