docker-compose：docker开源项目

curl -L "https://github.com/docker/compose/releases/download/1.28.2/docker-compose-(uname -s)-(uname -m)" -o /usr/local/bin/docker-compose
//验证已有docker-compose命令
docker-compose -v
//设置tab键的空格距离。
vim /root/.vimrc 
set tabstop=2
source /root/.vimrc
##### 一.docker-compose的配置文件实例 
通过识别一个docker-compose.yml的配置文件，去管理容器。
vim docker-compose.yml
version: '3.2'
services:
  nginx:
    restart: always
    image: nginx:latest
    container_name: web-nginx
    ports:
      - 90:80
    volumes:
     - ./webserver:/usr/share/nginx/html

nginx:                //服务的名称 
container_name: web-nginx   //容器名称,相当于docker  run  --name 
image: nginx:latest        //使用的镜像 
restart: always     //随开机自启
ports:              //端口映射,相当于docker run  -p
  - 90:80
volumes:    //持久化挂载,相当于docker run -v
command:    //容器执行命令，相当于docker file 里的CMD
networks:    //定义网络，相当于docker run --network
------------------------------------
//运行docker-compose规定的容器，
PS:在执行这条命令的当前目录下，也需要有一个docker-compose.yml的配置文件，并且通常只有一个。
docker-compose up
PS:  docker-compose  up  之后，会显示都做了什么操作，并占用终端， 如果想要退出终端占用，加-d  选项。
//保持后台运行
docker-compose up -d 
//停止运行
docker-compose stop 
//重启
docker-compose restart 
并且，在运行container的过程中，还可以支持Dockerfile
vim Dockerfile 
FROM nginx 
COPY ./webserver/index.html /usr/share/nginx/html/index.html
//修改docker-compose.yaml文件
version: '3.2'
services:
  nginx:
    build: .
    restart: always
    image: nginx-web:v1.0
    container_name: test-web
    ports:
      - 91:80
//运行docker-compose命令的时候，如果文件内有Dockerfile，可以提前 执行:docker-compose build  或者在up -d 的时候添加--build  选项。
docker-compose up -d  --build

vim docker-compose.yml 
version: '3.2'
services:
  nginx:
    restart: always
    image: nginx:latest
    ports:
      - 80
    volumes:
      - ./webserver:/usr/share/nginx/html
docker-compose scale nginx=2

docker-compose.yml
version: '3.2'
services:
   db:
     image: mysql:5.7
     volumes:
       - db_data:/var/lib/mysql
     restart: always
     environment:
       MYSQL_ROOT_PASSWORD: somewordpress
       MYSQL_DATABASE: wordpress
       MYSQL_USER: wordpress
       MYSQL_PASSWORD: wordpress
   wordpress:
     depends_on:
       - db
     image: wordpress:latest
     ports:
       - "8000:80"
     restart: always
     environment:
       WORDPRESS_DB_HOST: db:3306
       WORDPRESS_DB_USER: wordpress
       WORDPRESS_DB_PASSWORD: wordpress
       WORDPRESS_DB_NAME: wordpress
volumes:
  db_data: 
docker-compose up -d

docker network create --driver bridge --subnet 172.22.16.0/24 --gateway 172.22.16.1 demo1
mkdir /root/network1
cd /root/network1
vim docker-compose.yaml
version: '3'
services:
  nginx:
    container_name: web-nginx11
    image: nginx
    restart: always
    ports:
      - 99:80
    networks:
      demo1:
        ipv4_address: 172.22.16.23
networks:
  demo1:
    external: true

mkdir /root/network2
cd /root/network2
vim docker-compose.yml 
version: '3'
services:
  nginx:
    container_name: web-nginx2
    image: nginx
    restart: always
    ports:
      - 97:80
    networks:
      demo2:
networks:
  demo2:

version: "3"
networks:
  demo3:
    driver: bridge
    ipam:
      config:
      - subnet: 172.46.1.0/24
services:
  nginx:
    container_name: web2
    restart: always
    image: nginx:latest
    ports:
     - 92:80
    networks:
      demo3:
        ipv4_address: 172.46.1.2