问题
I have 2 docker containers running (A and B).
Have a need to call from within container A -> a bash command inside container B.
How to achieve this?
回答1:
If your B container looks something like this:
docker run -d --name b_container --rm ubuntu:latest sleep 50000
and your A container looks something like this:
docker run --rm -it -v /var/run/docker.sock:/var/run/docker.sock ubuntu:latest sh -c "apt-get update ; apt-get install docker.io -y ; bash"
you can do (while you're bashed into A):
$ env | grep HOSTNAME
HOSTNAME=7d146fa7caac
# # note this is the name for container A
# # and note that the name WONT look exactly like this, but very similar
$ docker exec -it b_container env | grep HOSTNAME
HOSTNAME=668838c220c0
# # and note that you are executing commands in container B and the `HOSTNAME` is different.
$ docker exec -it b_container ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 4372 672 ? Ss 14:40 0:00 sleep 50000
root 43 0.0 0.1 34420 2800 pts/0 Rs+ 14:48 0:00 ps aux
# # and here is how you know for sure that you're really hitting the other container
Ps. i don't suggest you do this, you wanted a way... there you are
来源：https://stackoverflow.com/questions/48990341/docker-how-to-call-bash-command-from-one-container-into-another-from-the-same