Startup

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docker container run hello-world

first pull the image from the registry
then run this image to become a container

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docker image pull alpine
docker image ls    #the same as 'docker images'
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docker container run alpine ls -l

a few things happen:

  • find the image
  • run image ==> container
  • run cmd
  • close container
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docker container run -it alpine /bin/sh

launch the shell and you can type in the terminal

swarm

in one node: (manager)

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docker swarm init --advertise-addr $(hostname -i)

in other node: (worker) copy & paste

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docker swarm join --token <token> <host>

in the manager node

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docker node ls

create a stack in the manager

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docker stack deploy --compose-file=docker-stack.yml voting_stack

a docker-stack.yml is like

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# this file is meant for Docker Swarm stacks only
# trying it in compose will fail because of multiple replicas trying to bind to the same port
# Swarm currently does not support Compose Spec, so we'll pin to the older version 3.9

version: "3.9"

services:

  redis:
    image: redis:alpine
    networks:
      - frontend

  db:
    image: postgres:15-alpine
    environment:
      POSTGRES_USER: "postgres"
      POSTGRES_PASSWORD: "postgres"
    volumes:
      - db-data:/var/lib/postgresql/data
    networks:
      - backend

  vote:
    image: dockersamples/examplevotingapp_vote
    ports:
      - 8080:80
    networks:
      - frontend
    deploy:
      replicas: 2

  result:
    image: dockersamples/examplevotingapp_result
    ports:
      - 8081:80
    networks:
      - backend

  worker:
    image: dockersamples/examplevotingapp_worker
    networks:
      - frontend
      - backend
    deploy:
      replicas: 2

networks:
  frontend:
  backend:

volumes:
  db-data:

![[{3A3E94E1-7C8E-4C55-9E2F-155FDB1904DD}.png]]

container

docker run : 新建并启动

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docker run -t -i ubuntu:18.04 /bin/bash

start a exited container

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docker container start

后台运行：-d

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docker run -d ubuntu:18.04 /bin/sh -c "while true; do echo hello world; sleep 1; done"

在后台后可以通过 container logs 查看标准输出

容器终止：

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docker container stop

或者等所有命令结束自动终止

删除所有终止状态的容器

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docker container prune

Dockerfile