Docker – Which one should i use? docker kill or docker stop

docker

Will docker stop fail if processes running inside the container fail to stop?? If i use docker kill, can unsaved data inside the container be preserved. Is docker stop time consuming compared to docker kill?? I want to do a shutdown of the container but without loosing any data(without high latency to complete kill or stop process).

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Line reference:

docker stop: Stop a running container (send SIGTERM, and then SIGKILL after grace period) [...] The main process inside the container will receive SIGTERM, and after a grace period, SIGKILL. [emphasis mine]

docker kill: Kill a running container (send SIGKILL, or specified signal) [...] The main process inside the container will be sent SIGKILL, or any signal specified with option --signal. [emphasis mine]

You can get more info from this post: https://superuser.com/questions/756999/whats-the-difference-between-docker-stop-and-docker-kill

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Docker – How does one remove a Docker image

Try docker rmi node. That should work.

Seeing all created containers is as simple as docker ps -a.

To remove all existing containers (not images!) run docker rm $(docker ps -aq)

Docker – I lose the data when the container exits

You need to commit the changes you make to the container and then run it. Try this:

sudo docker pull ubuntu

sudo docker run ubuntu apt-get install -y ping

Then get the container id using this command:

sudo docker ps -l

Commit changes to the container:

sudo docker commit <container_id> iman/ping

Then run the container:

sudo docker run iman/ping ping www.google.com

This should work.

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