Compose 简介
Compose 是用于定义和运行多容器 Docker 应用程序的工具。通过 Compose，您可以使用 YML 文件来配置应用程序需要的所有服务。然后，使用一个命令，就可以从 YML 文件配置中创建并启动所有服务。
YAML文件基础解读示例：
version: '3'
services:
mysql:
image: mysql:5.7.22
container_name: mysql
environment:
- MYSQL_ROOT_PASSWORD=root
restart: always
privileged: true
ports:
- "3306:3306"
networks:
- "net"
volumes:
- "/mysl_data/:/var/lib/mysql"
nginx:
image: nginx:latest
container_name: nginx
restart: always
ports:
- "80:80"
networks:
- "net"
volumes:
- "/nginx_data/:/usr/share/nginx/html/"
networks:
net:
driver: bridge
version：指定 docker-compose.yml 文件的写法格式的版本，写在yaml文件第一行
services：多个容器的集合，所有容器的定义都要写到services下
version: '3'
services:
container 1 的名称:
容器定义内容......
container 2 的名称：
容器定义内容......
image： 所使用的镜像
version: '3'
services:
mysql:
image: mysql:5.7.22
container_name：容器名称
version: '3'
services:
mysql:
image: mysql:5.7.22
container_name: mysql
environment：容器环境变量
environment:
- 变量名称1=值
- 变量名称2=值
restart: always，与docker run 后面的 restart: always 一样，使容器随Docker启动而启动
privileged: true 开启特权模式，使用该参数，container内的root拥有真正的root权限。否则，container内的root只是外部的一个普通用户权限。
ports 端口映射
ports:
- "宿主机端口:容器端口"
networks： 定义容器网络的名称，可在与services 平级的networks中来定义容器network的类型
networks:
- "net"
networks:
net:
driver: bridge
volumes: 数据卷挂载
volumes:
- "宿主机目录:容器目录"
[root@node_1 ~]# curl -L "https://github.com/docker/compose/releases/download/1.23.1/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
[root@node_1 ~]# chmod +x /usr/local/bin/docker-compose
docker-compose以下都需要在docker-compose.yml所在目录下执行，如果编写的yaml文件不叫docker-compose.yml，那么在执行的时候需要加-f参数指定yaml文件
[root@node_1 ~]# mkdir compose
[root@node_1 ~]# cd compose
[root@node_1 compose]# mkdir /mysl_data/
[root@node_1 compose]# mkdir /nginx_data
[root@node_1 compose]# vi docker-compose.yml
version: '3'
services:
mysql:
image: mysql:5.7.22
container_name: mysql
environment:
- MYSQL_ROOT_PASSWORD=root
restart: always
privileged: true
ports:
- "3306:3306"
networks:
- "net"
volumes:
- "/mysl_data/:/var/lib/mysql"
nginx:
image: nginx:latest
container_name: nginx
restart: always
ports:
- "80:80"
networks:
- "net"
volumes:
- "/nginx_data/:/usr/share/nginx/html/"
networks:
net:
driver: bridge
[root@node_1 compose]# docker-compose up -d
Creating network "compose_net" with driver "bridge"
Pulling mysql (mysql:5.7.22)...
5.7.22: Pulling from library/mysql
be8881be8156: Extracting [=============================================== ] 21.56MB/22.49MBownload complete
be8881be8156: Extracting [================================================ ] 21.79MB/22.49MBownload complete
be8881be8156: Extracting [================================================= ] 22.25MB/22.49MBownload complete
be8881be8156: Pull complete
c3995dabd1d7: Pull complete
9931fdda3586: Pull complete
bb1b6b6eff6a: Pull complete
a65f125fa718: Pull complete
2d9f8dd09be2: Pull complete
37b912cb2afe: Pull complete
79592d21cb7f: Pull complete
00bfe968d82d: Pull complete
79cf546d4770: Pull complete
2b3c2e6bacee: Pull complete
Creating mysql ... done
Creating nginx ... done
[root@node_1 compose]# docker-compose ps
Name Command State Ports
-----------------------------------------------------------------------
mysql docker-entrypoint.sh mysqld Up 0.0.0.0:3306-3306/tcp
nginx /docker-entrypoint.sh ngin ... Up 0.0.0.0:80-80/tcp
[root@node_1 compose]# echo "It's OK" /nginx_data/index.html
[root@node_1 compose]# curl 127.0.0.1:80
It's OK
[root@node_1 compose]# mysql -uroot -proot -h 127.0.0.1
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.22 MySQL Community Server (GPL)
Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql
docker-compose ps ##查看当前目录下yaml文件定义的容器状态
docker-compose stop ##停止当前目录下yaml文件定义的容器
docker-compose start ##启动当前目录下yaml文件定义的容器
docker-compose rm ##删除当前目录下yaml文件定义的容器
