docker-cheatsheet.md

Docker

Docker Documentation

https://docs.docker.com/get-started/

Run a new container

docker container run (start a new container from an image)
docker container run -- name app nginx (assign a name for the container)
docker container run -p 8080:80 nginx (map a por os container)
docker container run -P nginx (map all the ports)
docker container run -d nginx (start a container in background)
docker container run --hostname srv nginx (assign a hostname)
docker container run --add-host HOSTNAME:IP IMAGE (add a DNS entry)
docker container run -v ~/:/usr/share/nginx/html nginx (map a local directory into the container)
docker container run -ti  --entrypoint bash nginx (change the entrypoint)

Basic Docker Commands

curl -fsSl https://get.docker.com | bash (faz a instalacao do Docker via script)
docker --version (verifica a versao do Docker)
systemctl status docker (verifica se o servico do Docker esta sendo executado)
docker container run hellow-world (executa um container)
docker container run -ti hello-world (executa um container)

Manage Volumes

$ docker container run -d -p 80:80 --name phpmessage_container -v volumeteste:/var/www/html --rm phpmessages (executando um container com volume)
$ docker volume inspect teste (inspecionar um volume criado)

Manage Services

docker service create (cria um service)
docker service ls (lista um service)
docker service inspect (mostra detalhes de um service)
docker service scale (aumenta/diminui a quantidade de replicas de um service)
docker service ps (lista os pods de um service)
docker service logs (mostra os logs de um service)
docker service rm (remove um service)

Manage Swarm

docker swarm init (inicia um cluster de swarm)
docker swarm join (comando para adicionar novos nodes ao cluster)
docker node ls (lista os nodes do cluster)
docker swarm join-token manager (lista o token para adicionar novos managers ao cluster)
docker swarm join-token worker (lista o token para adicionar novos workers ao cluster)
docker node inspect (mostra detalhes sobre o node)
docker node promote (promove um node para manager)
docker node demote (muda um node manager para worker
docker node rm (remove um node)
docker swarm leave (para que o node saia do cluster)
docker swarm leave --force (para que um node manager saia do cluster)

Manage Containers

docker container ls - show a list of containers
docker container ls -a - show a list of all containers
docker container rm app - delete the container
docker container rm -f app - delete a running container
docker container prune - delete stopped containers
docker container stop app - stop a running container
docker container start app - start a stopped container
docker container cp app:/index.html index.html

Docker Compose

Basic example

# docker-compose.yml
version: '2'

services:
  web:
    build: .
    # build from Dockerfile
    context: ./Path
    dockerfile: Dockerfile
    ports:
     - "5000:5000"
    volumes:
     - .:/code
  redis:
    image: redis

Docker Compose Commands

docker-compose start (start the services)
docker-compose stop (stop the services)
docker-compose ps (list the containers)
docker-compose up (create and start the containers)
docker-compose down (stop and remove the resources)