docker-compose怎么用

这篇文章给大家分享的是有关docker-compose怎么用的内容。小编觉得挺实用的，因此分享给大家做个参考，一起跟随小编过来看看吧。

The Compose file is a YAML file defining services, networks and volumes. A service definition contains configuration that is applied to each container started for that service, much like passing command-line parameters to docker run. Likewise, network and volume definitions are analogous to docker network create and docker volume create.As with docker run, options specified in the Dockerfile, such as CMD, EXPOSE, VOLUME, ENV, are respected by default - you don’t need to specify them again in docker-compose.yml.

文档上这段话已经概括了docker-compose编排文件的写法。一个yaml的编排文件定义了 services, networks and volumes，service定义的配置其实就是docker run命令的参数，同理network and volume定义的是docker network create，docker volume create命令，在dockerfile文件中有的诸如CMD, EXPOSE, VOLUME, ENV命令则不需要重新定义。剩下的需要什么找什么命令就好了。

一个例子：

创建一个名为kong-net，桥接模式的network，将3个容器加入进来，其中kong容器是使用dockerfile构建，db和konga使用远程仓库镜像，kong的启动在db之后，konga的启动在kong之后。

version: '3'
services:
  kong:
    container_name: kong-dapeng
    environment:
      - KONG_DATABASE=postgres
      - KONG_PG_HOST=kong-database
      - KONG_PG_PASSWORD=kong
      - KONG_PROXY_ACCESS_LOG=/dev/stdout
      - KONG_ADMIN_ACCESS_LOG=/dev/stdout
      - KONG_PROXY_ERROR_LOG=/dev/stderr
      - KONG_ADMIN_ERROR_LOG=/dev/stderr
      - KONG_ADMIN_LISTEN=0.0.0.0:8001, 0.0.0.0:8444 ssl
      - KONG_PLUGINS=bundled,router-by-jwt-claim,jwt-dapeng,kafka-log
    build: .
    ports:
      - "80:8000"
      - "8001:8001"
    networks:
      - kong-net
    depends_on:
      - db
  db:
    container_name: kong-database
    image: "postgres:9.6"
    ports:
      - "5432:5432"
    environment:
      - POSTGRES_USER=kong
      - POSTGRES_DB=kong
      - POSTGRES_PASSWORD=kong
    volumes:
      - /dockerV/postgres:/var/lib/postgresql/data
    networks:
      - kong-net
  konga:
    container_name: konga
    image: "pantsel/konga"
    ports:
      - "1337:1337"
    environment:
      - DB_ADAPTER=postgres
      - DB_HOST=kong-database
      - DB_PORT=5432
      - DB_USER=kong
      - DB_PASSWORD=kong
      - DB_DATABASE=konga
    networks:
      - kong-net
    depends_on:
      - kong
networks:
  kong-net:
    driver: bridge

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