Docker Cheatsheet

April 10, 2021

Setup

Install

go to https://docs.docker.com/get-started/ download version for your OS

Check version

docker version

Lifecycle

Create

This is will create a new contrainer and return its id

docker create hello-world

Start

docker start -a ecfa027a48b2840d6ec8db4d14e558577bf3f6c06d5539090bdada3fd5ca8e29

Will print all of the logs when it is running

docker start -a ecfa027a48b2840d6ec8db4d14e558577bf3f6c06d5539090bdada3fd5ca8e29

Will only print the response

Run

Run = Create + Start

docker run busybox echo hi there

Stop

Sends SIGTERM and waits till process stop before it stops container

docker create busybox ping  google.com
docker start a2b4916bd95adfd7badc8db02f40cb1ab816e66be970a306771f5dee4c189af5
docker ps

docker stop a2b4916bd95a

Kill

Sends SIGKILL will shut down now and does not wait for processes to stop

docker create busybox ping  google.com
docker start a2b4916bd95adfd7badc8db02f40cb1ab816e66be970a306771f5dee4c189af5
docker ps

docker kill a2b4916bd95a

Prune

This will delete stopped containers, cache, and images

docker system prune

List Contrainers

Running

docker ps

All

You are able to reuse container id to run it

docker ps --all

Logs

docker create busybox echo hi there
docker start 12122afb3886801718694ed0d32fc414cbcf051f330515f5c5690f5c6b00924
docker logs 12122afb3886801718694ed0d32fc414cbcf051f330515f5c5690f5c6b00924

Running commands in existing container

run a certain command

docker run redis
docker ps
docker exec -it f82394b79b0d redis-cli

run a shell command

docker run redis
docker ps
docker exec -it f82394b79b0d sh
redis-sever