Duplicating docker container for debugging

Question

I have a running docker container. I have done some useful works in the running docker container. I have done these works not part of dockerfile, i have done it inside the c

Answer 1

If you have a container my-cont and you want to debug it, there is no need to install debugging tools inside it. What you can do instead is to use another container from a debug image e.g. xyz_docker_img then let it shares the same namespaces with my-cont container with extra capabilities you need for debugging.

$ docker run -it \
                --pid=container:my-cont 
                --net:container:my-cont
                --cap-add NET_RAW 
                --cap-add NET_ADMIN 
                --cap-add SYS_PTRACE
                xyz_docker_image bash