docker stats <container_id> : If you just need to keep an eye on the metrics of your container to work out what’s gone wrong, docker stats can help: it’ll give you a live stream of resource usage, so you can see just how much memory you’ve leaked so far.
docker cp <container_id> : /path/to/useful/file/local-path Often just getting hold of more log files is enough to sort you out. If you already know what you want, docker cp has your back: copy any file from any container back out onto your local machine, so you can examine it in depth (especially useful analysing heap dumps)._
docker exec -it <container_id> /bin/bash : Next up, if you can run the container (if it’s crashed, you can restart it with docker start ), shell in directly and start digging around for further details by hand.
docker commit <container_id> my-broken-container && docker run -it my-broken-container /bin/bash