上一回学习了如何利用docker搭建一个mysql + java service + nginx，总共4个docker容器，如果采用docker run的方式一个一个容器去创建十分麻烦。为了能更高效的批量创建容器，docker推出了docker-compose工具，只需要定义一个docker-compose.yml文件即可快速搞定一组容器的创建，仍然以上一回的例子演示：
mysql:
image: daocloud.io/yjmyzz/mysql-osx:latest
volumes:
- ./mysql/db:/var/lib/mysql
ports:
- 3306:3306
environment:
- MYSQL_ROOT_PASSWORD=123456
service1:
image: java:latest
volumes:
- ./java:/opt/app
expose:
- 8080
#ports:
# - 9081:8080
links:
- mysql:default
command: java -jar /opt/app/spring-boot-rest-framework-1.0.0.jar
service2:
image: java:latest
volumes:
- ./java:/opt/app
expose:
- 8080
#ports:
# - 9082:8080
links:
- mysql:default
command: java -jar /opt/app/spring-boot-rest-framework-1.0.0.jar
nginx1:
image: nginx:latest
volumes:
- ./nginx/html:/usr/share/nginx/html:ro
- ./nginx/nginx.conf:/etc/nginx/nginx.conf:ro
- ./nginx/conf.d:/etc/nginx/conf.d:ro
#expose:
# - 80
ports:
- "80:80"
links:
- service1:service1
- service2:service2
内容不复杂，具体的关键字说明见本文最后的参考文章链接。
问题：这个文件放在哪里？
参见下面的目录结构：
mysql-java-nginx
├── docker-compose.yml
├── java
│ └── spring-boot-rest-framework-1.0.0.jar
├── mysql
│ └── db
└── nginx
├── conf
├── conf.d
│ └── default.conf
├── html
│ └── index.html
└── nginx.conf
创建容器：
cd mysql-java-nginx
docker-compose up
就是这么简单，一个up就搞定了所有容器的创建，up通常用于首次创建，可以观察终端实时输出的日志内容判断容器是否启动正常，如果没什么问题，直接Ctrl+C退出，然后
以后台方式启动容器。
其它命令还有：
Commands:
build Build or rebuild services
help Get help on a command
kill Kill containers
logs View output from containers
pause Pause services
port Print the public port for a port binding
ps List containers
pull Pulls service images
restart Restart services
rm Remove stopped containers
run Run a one-off command
scale Set number of containers for a service
start Start services
stop Stop services
unpause Unpause services
up Create and start containers
migrate-to-labels Recreate containers to add labels
version Show the Docker-Compose version information
基本上看名字就知道意思了。
参考文章：
https://docs.docker.com/compose/compose-file/
