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Docker ComposeÊÇDocker¹Ù·½ÍƳöµÄÒ»ÖÖ¹¤¾ß£¬¿ÉÒÔͨ¹ýÒ»¸öYAMLÎļþ½ç˵¶à¸öÈÝÆ÷µÄÉèÖú͹Øϵ£¬²¢ÊµÏÖËüÃǵÄÅúÁ¿ÖÎÀí¡£Í¨¹ýÐ޸ĸÃÎļþÖеÄÈÝÆ÷ÊýÄ¿£¬¿ÉÒÔ¼òÆÓ¿ì½ÝµØʵÏÖÈÝÆ÷µÄˮƽÀ©Õ¹¡£ÏÂÃæÊÇÒ»¸öʾÀýµÄDocker ComposeÎļþ£¬ÆäÖаüÀ¨ÁËÒ»¸öWebÓ¦ÓúÍÒ»¸öÊý¾Ý¿âµÄÉèÖãº

version: '3'
services:
  web:
    build: .
    ports:
      - "80:80"
    depends_on:
      - db
  db:
    image: mysql:5.7
    environment:
      - MYSQL_ROOT_PASSWORD=root

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version: '3'
services:
  web:
    build: .
    ports:
      - "80:80"
    depends_on:
      - db
    replicas: 3
  db:
    image: mysql:5.7
    environment:
      - MYSQL_ROOT_PASSWORD=root

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$ docker-compose up -d

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Docker SwarmÊÇDocker¹Ù·½ÌṩµÄÒ»ÖÖÈÝÆ÷±àÅźͼ¯ÈºÖÎÀí¹¤¾ß£¬Í¨¹ýÔÚ¶à¸ö½ÚµãÉϵ÷ÀíºÍÖÎÀíDockerÈÝÆ÷£¬ÊµÏÖÁËÈÝÆ÷µÄˮƽÀ©Õ¹¡£ÏÂÃæÊÇÒ»¸öʾÀýµÄDocker SwarmÉèÖÃÎļþ£º

version: '3'
services:
  web:
    image: nginx:latest
    deploy:
      replicas: 3
      restart_policy:
        condition: on-failure

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$ docker stack deploy -c docker-compose.yml myapp

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DockerÄÚÖÃÁËÒ»ÖÖ»ùÓÚround-robinËã·¨µÄ¸ºÔØƽºâÆ÷£¬¿ÉÒÔ×Ô¶¯½«ÇëÇóÔȳƵطÖÅɵ½¶à¸öÈÝÆ÷ÉÏ¡£Ö»Ð轫¶à¸öÏàͬµÄÈÝÆ÷Ó³É䵽ͳһ¸ö¶Ë¿ÚÉÏ£¬¼´¿ÉʵÏÖ¸ºÔØƽºâ¡£ÏÂÃæÊÇÒ»¸öʾÀýµÄDocker ComposeÎļþ£¬ÆäÖаüÀ¨ÁËÁ½¸öWebÓ¦ÓõÄÉèÖãº

version: '3'
services:
  web1:
    build: .
    ports:
      - "8080:80"
  web2:
    build: .
    ports:
      - "8081:80"

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http {
    upstream backend {
        server web1:80;
        server web2:80;
    }
    
    server {
        listen 80;
        
        location / {
            proxy_pass http://backend;
        }
    }
}

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Docker¹Ù·½Îĵµ£ºhttps://docs.docker.com/

Docker Compose¹Ù·½Îĵµ£ºhttps://docs.docker.com/compose/

Docker Swarm¹Ù·½Îĵµ£ºhttps://docs.docker.com/engine/swarm/

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