Docker basic essential commands

[etture]

• good to just alias docker="sudo docker" so that you don't have to type sudo every time

See

• docker ps: see running containers
• docker container ls -a: see all containers, even those that have stopped
• docker images: see images on disk

Run

• docker run <image_name>: run an image as a container
  • options
    • -p: expose a port inside the container to the host
      • e.g. -p 8123:8123
    • -v: mount a volume on the host to the container
      • e.g. -v /tmp:/usr
    • -d: run in detached mode
    • -ti: add terminal driver and run in interactive mode
    • -e: add environment variable
      • e.g. -e MYSQL_USER=etture
    • '--name`: designate a name for the container
      • e.g. --name my_container
  • complete example:

    sudo docker run -d -ti \
        -p 8123:8123 -v /tmp/usr \
        -e MYSQL_USER=etture \
        --name my_container \
        ubuntu:18.04 /bin/bash

• docker exec: run a command in a running container
  • e.g. sudo docker exec -ti <container_name> /bin/bash
    • log in to the running container through an interactive shell

Remove

• docker kill <container_name>: kill a container process
• docker container rm <container_name>: remove a container from storage
• docker rmi <image_name>: remove an image

Build

• docker build -t <image_tag_name> .: build a new image using the Dockerfile in the current directory
• docker tag SOURCE_IMAGE[:TAG] TARGET_IMAGE[:TAG]: change name of an existing image
• docker push <image_tag_name>: push the image onto the Docker registry