Docker

💡 Crie sua conta no Docker Hub e no PWD

Docker Hub Container Image Library | App Containerization

Play with Docker

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percurso de aprendizado docker

💡 Imagens

docker pull alpine:3.6
docker pull alpine:3.7

docker images

💡 Containers

docker run -d -p 80:80 nginx

docker ps -a

💡 Exportando e importando containeres como imagens

docker export <container> > <filename>.tar

docker import - mynginx < <filename>.tar

💡 Ou, exportando e importando imagens

docker save -o mynginx1.tar nginx

docker load < mynginx1.tar

💡 Subindo uma imagem para o DockerHub

docker run -dit alpine sh

docker exec -it /bin/sh

cat /etc/os-release

💡 Modificar o container

docker commit -m "Alpine Python 3" <container> <usuario>/<repo>

docker login

docker push <usuario>/repo

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Dockerfiles...

• ADD
• COPY
• CMD
• ENTRYPOINT
• RUN
• WORKDIR
• ENV

Docker Hub

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💡 Docker Compose!!

version: '2'
services:
  mysql:
    image: 'bitnami/mariadb'
    ports: 
      - '3306:3306'
    environment:
      - MARIADB_ROOT_PASSWORD=secret

  phpmyadmin:
    image: 'phpmyadmin/phpmyadmin'
    links:
      - mysql
    ports:
      - '80:80'
    environment:
      PMA_HOST: mysql
      PMA_PORT: 3306

💡 O que mais?

Docker Swarm!

Docker Engine 1.12

docker swarm init

docker swarm init --advertise-addr eth0

version: '3'
services:
  mysql:
    image: 'bitnami/mariadb'
    deploy:
      mode: replicated
      replicas: 2
      resources:
        limits:
          cpus: '0.25'
          memory: '512M'
        reservations:
          cpus: '0.2'
          memory: '256M'
    networks:
      - exemplo_net
    environment:
      - MARIADB_ROOT_PASSWORD=secret
phpmyadmin:
    image: 'phpmyadmin/phpmyadmin'
    networks:
      - exemplo_net
    deploy:
      mode: replicated
      resources:
        limits:
          cpus: '0.25'
          memory: 512M
        reservations:
          cpus: '0.25'
    links:
      - mysql
    ports:
      - '80:80'
    environment:
      PMA_HOST: mysql
      PMA_PORT: 3306

networks:
  exemplo_net:

docker stack deploy --compose-file docker-compose.yml stackdemo

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