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Docker.md

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Cheatsheets // Docker

Typical setup

  • Download image
  • Run a container with exposed ports
  • Exit container
  • Continue by starting the exited container

Pro tip: Add this to your aliases(.bashrc,.zshrc):

alias dps="echo -e 'Currently up and running:\n' && docker ps && echo -e '\n'"
alias dpsa="echo -e 'Currently up and running:\n' && docker ps && echo -e '\nAvailable containers:\n' && docker ps -a && echo -e'\n'"
alias dcup="docker-compose up"
alias dcdown="docker-compose down"
alias dstart="docker start"
alias dstop="docker stop"
alias dimages="docker images"
alias dcontainers="docker ps -a"
alias dattach="docker attach"
alias dlogs="docker logs"
alias dkillall="docker stop $(docker ps -aq) && docker rm $(docker ps -aq)" # containers only
alias dnuke="docker stop $(docker ps -aq) && docker rm $(docker ps -aq) && docker rmi -f $(docker -aq)" # images and containers
alias getip="ifconfig | grep inet"
dexec(){
    docker exec -it $1 /bin/bash
}

Basics

Enable docker [Linux]
systemctl enable docker.service
systemctl start docker.service
Download image
docker pull _IMAGENAME_
Expose ports between VM and host
docker run -p _HOSTPORT_:_CONTAINERPORT_ _IMAGE_
Expose all ports of the container between the VM and the host
docker run -P _IMAGE_
list images
docker images
list containers
docker ps -a
run container from image
docker run _IMAGE_
stop container
docker stop _CONTAINER_ID_
start exited container
docker start _CONTAINER_ID_
remove container
docker rm _CONTAINER_ID_
Check container logs
docker logs _CONTAINER_ID_

Shortcuts and troubleshooting

remove all exited containers
docker ps -a | grep Exit | cut -d ' ' -f 1 | xargs docker rm

alternatively,
docker [image/container/volume/network] prune (-a)
kill and remove all containers
docker stop $(docker ps -aq) && docker rm $(docker ps -aq)
Reconnect to Docker
docker-machine env default  
_run the last line as mentioned. e.g:_  
eval $("C:\Program Files\Docker Toolbox\docker-machine.exe" env default)
List ip-address
docker-machine ls
Running commands on a container
docker exec -it CONTAINER_NAME bash -l

Using Docker Compose

Using compose to create all containers
docker-compose up
Using compose to stop and remove all containers
docker-compose down
Using compose to stop all containers
docker-compose stop
Using compose restart all exited containers
docker-compose start
Checking status of composed containers
docker-compose ps
List images as used by compose
docker-compose images
build fresh image regardless of cache
docker build -f "path/to/dockerfile.local" --pull --no-cache
remove all intermediate images
docker rmi $(docker images -f "dangling=true" -q)
Get the ip-address and checking the port of a composed service
docker exec -it _CONTAINER_NAME_ bash
ping _SERVICE_
curl -s _SERVICE_:_PORT_ >/dev/null && echo Success. || echo Fail.