SimplySylvia/Cheat-Sheet-Docker

A cheat sheet about docker commands with example code.

🐳 Docker Command Cheat Sheet

With docker installed, here are some common commands you will use. I have also provided some example code to check out.

Check available containers

docker ps

example output

CONTAINER ID   IMAGE          COMMAND                  CREATED         STATUS         PORTS                    NAMES
17f6f866d38c   446dbae429b7   "docker-entrypoint.s…"   6 minutes ago   Up 6 minutes   0.0.0.0:8000->4000/tcp   festive_knuth

Create an Image

Breakdown

docker build -t [username]/[appname:version] [directory]

Example

docker build -t daltonhj/docker_example:1.0 . # the . here is current directory

Build Container

The run command actually builds the container and then starts it up.

Breakdown

docker run -d -p [local port]:[container port] [imageID]

Example

docker run -d --name myContainer -p 4000:4000 446dbae429b7

Stop Container

Breakdown

docker stop [container]

Example

docker stop myContainer

Restart Container

Breakdown

docker start [container]

Example

docker start myContainer

Create Volume

docker volumn create [volumn name]

Example

docker volumn create shared-stuff

Use a Volumne

docker run -d --name myContainer --mount source=shared-stuff,target=/stuff -p 4000:4000 446dbae429b7

Execute Commands Inside the Docker Container

Breakdown

docker exec [container name] [command to run]

Example

docker exec myContainer cat src/index.js

Want to access the bash terminal inside the container?

docker exec -it myContainer /bin/bash

Docker Compose

If you setup a docker-compose yaml file this will make things a lot easier as you will not need to run the above commands and allows you to define the commands for multiple containers in the same go.

With yaml file created to start up

docker-compose up -d

To spin up multiple containers per image

docker-compose up --scale [service]=[amount]

With yaml file to spin down

docker-compose down