Build

Build a container image

https://docs.docker.com/engine/reference/commandline/build/

If the current directory has a Dockerfile:

docker build -t IMAGE_NAME .

Run

Run a container image

https://docs.docker.com/engine/reference/commandline/run/

docker run FLAGS IMAGE_NAME [COMMANDS]

⚠ Make sure the flags come before the image name, otherwise they’ll be interpreted as commands to run inside the container

Some helpful flags:

• --rm: Automatically delete the container when it’s stopped
• -it: Use these when you will be connecting to the container (e.g. to run a shell)
• --network=host: Use the host machine’s network instead of the default bridge network
  • This can be useful whenever the container is having problems accessing the network
• -v: Mount a directory from the host machine on the container, e.g. -v "$PWD:/build"
• -e: Set an environment variable, e.g. -e grails.env=dev
  • Or use --env-file to read in a .env file
• --name: When not using --rm, give the container a name which can be used to re-run it using docker start, e.g. docker start -a NAME

Containers

List running containers

docker container ls

List all containers

docker container ls --all

Connect to a terminal in a container

docker container exec -it CONTAINER_NAME_OR_ID sh

Stop a container

docker container stop CONTAINER_NAME_OR_ID

Delete a container

docker container rm CONTAINER_NAME_OR_ID

Images

List images

docker image ls

Clean up images

This will delete all images that don’t have an associated container (you may want to delete any unused containers first–see above)

docker image prune -a

Volumes

List volumes

docker volume ls

Create a volume

docker volume create VOLUME_NAME

Delete a volume

docker volume rm VOLUME_NAME