docker-erlang-example/advanced_examples/elk/Docker-Cheat-Sheet.md

Docker Cheatsheet

• Remove all containers that are not running:

    $ docker rm $(docker ps -aq -f status=exited)
  

• Remove dangling images:

    $ docker rmi $(docker images -f dangling=true -q)
  

• Attach to running docker:

    $ docker exec -i -t NameOrId /bin/sh
  

Core generation

• /proc/sys/core_pattern is clearly persisted on the host. Taking note of its content before starting any endeavour is therefore highly encouraged.

• dockers --privileged is necessary for a gdb session to catch the stack, without privileges, gdb just complains about No stack. Google still is hardly knowledgeable about this phenomenon...

• setting ulimit on docker run works perfectly, for future googlers (syntax hard to find), a docker-compose example:

  ulimits: core: -1