Docker Cheatsheet

cheatsheet.md

Docker CheetSheet

Creates a container of the given image

docker run [options] image_name [command]

Most used options

You can get this list and more by running docker run --help.

• -p or --publish publish a port from the container to your local machine "-p <host port>:<container port>"
• -v or --volume mount a volume from the host to the container "-v /absolut/path/dir:/container/path"
• -e or --env set an environment variable for the container "-e <VariableName>=VALUE"
• -i or --interactive keep STDIN open even if not attached
• -t or --tty allocate a pseudo-TTY
• -d or --detach detached mode will put the container to run in the background
• --rm deletes the container after it has finished the process
• --name set a name for the container

Examples

Start nginx server

docker run --publish 8080:80 --volume /some/content:/usr/share/nginx/html nginx

Start mysql server

docker run --publish 3306:3306 --name some-mysql -e MYSQL_ROOT_PASSWORD=root -d mysql

Start bash in a fresh Ubuntu

docker run -it ubuntu bash

Creates an image from a docker file

docker build <options> <path to directory>

Options

• -t set the tag for the builed image

Container management

List all the running containers

docker ps

List all the containers even the stopped ones

docker ps -a

Start stop and remove containers

docker start <container name or container id>
docker stop  <container name or container id>
docker rm <container name or container id>

Manage Images

List all the images on your computer

docker image ls

Remove an image from yout system usually to clean some space

docker image rm <image name>

Executes a command inside a container usually run bash

docker exec -it <container Name> <command>

Sharing the image

save an image into a file

docker save <image name> > name.tar.gz

load an image from a file

docker load < name.tar.gz

To push to the public repository you should prefix your image with your username like adalessa/imagename:version for a local repository preapend the image with the server url

docker push <image name>

Docker compose

Get the configuration running, add the -d to run detached

docker-compose up

List the running services for the configuration

docker-compose ps

Stop and destroy the containers

docker-compose down

Stop and start all the services

docker-compose restart

Execute a command inside a services

docker-compose exec <service Name> <command>