How to terminate a Docker container which is running as part of bash script when the bash script is killed?

Question

#/bin/bash 
docker run ubuntu sleep 3000

I have a bash script which runs docker container but when the script is terminated using kill -9 pid [SIGKILL] the docker container continues to run. How can i terminate the docker container when bash script is killed?

I tried using trap but SIGKILL signal can't be trapped so i am trying to find if there are any alternate ways to stop the container

Answer 1

Actually you can stop your docker container.

docker run ubuntu sleep 3000

will create a docker image an launch it in a container.

docker ps -a
CONTAINER ID   IMAGE                                                                     COMMAND        CREATED          STATUS                            PORTS     NAMES
59ba158952c9   ubuntu                                                                    "sleep 3000"   4 seconds ago    Up 3 seconds                                infallible_jackson
34fbe4742f34   ubuntu                                                                    "sleep 1000"   40 seconds ago   Exited (137) 17 seconds ago                 confident_perlman
80a4d44a23be   ubuntu                                                                    "sleep 1000"   2 minutes ago    Exited (137) About a minute ago             busy_colden
e40b91d7b13f   ubuntu                                                                    "sleep 100"    4 minutes ago    Exited (0) 2 minutes ago                    trusting_merkle

then you can docker stop 59ba158952c9 (id of the container you want to stop). and the remove it if necessary

docker rm 59ba158952c9

I suggest you to have a look at the following documentations: https://docs.docker.com/engine/reference/commandline/stop/ https://docs.docker.com/engine/reference/commandline/container_rm/

Sorry my answer was not full complete.

let's add the docker command in a script

echo "docker run ubuntu sleep 3000" > toto.sh

then kill -9 the script: ps -aux | grep toto

mytoto+ 1320784  0.0  0.0  12664  3288 pts/15   S+   07:49   0:00 bash toto.sh

then the docker container is still active and you and retrieve it with a grep for instance:

docker ps | grep "ubuntu.*sleep 3000" | cut -d" " -f1
2baf9fb7223d

copy the id in the variable ID

 ID=$(docker ps | grep "ubuntu.*sleep 3000" | cut -d" " -f1)
 echo $ID
    2baf9fb7223d

And finally stop / remove the container

docker container stop "${ID}"
docker container rm "${ID}"