Day1 Answers

What is the diff between docker pause and docker unpause?

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]

The docker unpause command un-suspends all processes in the specified containers. On Linux, it does this using the freezer cgroup.

The docker pause command suspends all processes in the specified containers. On Linux, this uses the freezer cgroup. Traditionally, when suspending a process the SIGSTOP signal is used, which is observable by the process being suspended. With the freezer cgroup the process is unaware, and unable to capture, that it is being suspended, and subsequently resumed. On Windows, only Hyper-V containers can be paused.

Pause basically on a temporary basis stops all specified contains and we can unpause the specified containers with the below command

docker pause
docker unpause

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
bf3be341680e jenkins/jenkins “/sbin/tini — /usr/…” 14 minutes ago Up 14 minutes 8080/tcp, 50000/tcp quizzical_cannon

What is the diff between docker stop and docker kill?
Docker kill command kills the specified container that container will no longer run any process and shwos as exited
STOP basically stops the specified container with the process and also shows as exited

docker stop
docker kill