Comandos Docker.

docker pull nginx:latest
docker pull node:20-alpine

docker build -t myapp:1.0 .
# sem cache
docker build --no-cache -t myapp:1.0 .

docker images
docker images -a  # inclui imagens intermediárias

docker tag myapp:1.0 myuser/myapp:latest

docker push myuser/myapp:latest

docker rmi myapp:1.0
docker rmi $(docker images -q)  # todas as imagens

docker image prune -a

docker save -o myapp.tar myapp:1.0

# segundo plano, com porta mapeada
docker run -d --name web -p 8080:80 nginx
# com um volume
docker run -d -v /host/path:/app -e NODE_ENV=prod node:20

docker run -it ubuntu bash
docker run --rm -it node:20 sh

docker ps
docker ps -a
docker ps --format "table {{.Names}}\t{{.Status}}"

docker exec -it web bash
docker exec web ls /app

docker logs web
docker logs -f web  # acompanha os logs
docker logs --tail 100 web

docker stop web
docker stop $(docker ps -q)  # todos os contêineres

docker rm web
docker rm $(docker ps -aq)  # todos os contêineres

docker inspect web
docker inspect -f '{{.NetworkSettings.IPAddress}}' web

docker cp ./config.json web:/app/config.json
docker cp web:/app/logs ./logs

docker stats
docker stats web --no-stream

docker volume create mydata

docker volume ls

docker volume inspect mydata

docker volume rm mydata
docker volume prune  # remove todas as imagens não utilizadas

docker network ls

docker network create mynet
docker network create --driver overlay myswarm

docker network connect mynet web

docker network inspect mynet

docker compose up -d
docker compose up -d --build  # força uma nova build

docker compose down
docker compose down -v  # também EXCLUI volumes e seus dados

docker compose logs -f
docker compose logs -f web  # apenas o serviço web

docker compose exec web sh
docker compose exec db psql -U postgres

docker compose ps

docker compose pull
docker compose pull web

# consulta o uso de disco; não é uma simulação
docker system df
docker system prune -a --volumes  # inclui volumes anônimos

docker system df
docker system df -v  # uso detalhado

docker info