使用docker compose部署服务【转】

来自：http://blog.csdn.net/yl_1314/article/details/53761049

谈到微服务的话题，技术上我们往往会涉及到多服务、多容器的部署与管理。 
Docker 有三个主要的作用：Build, Ship和Run。使用docker compose我们可以在Run的层面解决很多实际问题，如：通过创建compose(基于YUML语法)文件，在这个文件上面描述应用的架构，如使用什么镜像、数据卷、网络、绑定服务端口等等，然后再用一条命令就可以管理所有的服务（如启动、停止、重启、日志监控等等）。 
本文通过发布3个APP(App1,App2,App3），来演示Docker在服务发布、网络、共享分区以及信息隔离与连通方面的工作： 
1.安装Compose:

[root@docker ~]# curl -L "https://github.com/docker/compose/releases/download/1.9.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose[root@docker ~]# docker-compose versiondocker-compose version 1.9.0, build 2585387docker-py version: 1.10.6CPython version: 2.7.9OpenSSL version: OpenSSL 1.0.1t  3 May 2016
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2.服务物理框架 

说明： 
a.Container1和2共在一个network namespace（netName1)内，Container3独立network namespace(netName2) 
b.Container1挂载了一个系统卷（/opt/conf)到/mnt 
c.Container3挂载了一个系统卷（./app/web)到/usr/share/nginx/html 
c.Container1,2,3 nginx监听端口分别为:8080,8081,8082

3.docker-compose.yml 内容

[root@docker compose]# more docker-compose.yml version: '2'services:  App1:    image: nginx    ports:      - "8080:80"    networks:      - "netName1"    volumes:      - /opt/conf/:/mnt  App2:    image: nginx    ports:      - "8081:80"    networks:      - "netName1"    volumes:      - /opt/conf/:/mnt  App3:    image: nginx    ports:      - "8082:80"    networks:      - "netName2"networks:  netName1:    driver: bridge  netName2:    driver: bridge
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4.运行

[root@docker compose]# docker-compose upCreating network "compose_netName1" with driver "bridge"Creating network "compose_netName2" with driver "bridge"Creating volume "compose_vol1" with local driverCreating compose_App2_1Creating compose_App1_1Creating compose_App3_1
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在后台运行：[root@docker compose]# docker-compose up -d

5.查看容器运行状态

[root@docker compose]# docker-compose ps     Name              Command          State               Ports             -----------------------------------------------------------------------------compose_App1_1   nginx -g daemon off;   Up      443/tcp, 0.0.0.0:8080->80/tcp compose_App2_1   nginx -g daemon off;   Up      443/tcp, 0.0.0.0:8081->80/tcp compose_App3_1   nginx -g daemon off;   Up      443/tcp, 0.0.0.0:8082->80/tcp 
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其他命令：

[root@docker compose]# docker-compose restart #重启所有容器[root@docker compose]# docker-compose restart App1  #重启App1[root@docker compose]# docker-compose stop #停止所有容器[root@docker compose]# docker-compose stop App1  #停止App1
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6.验证网络隔离： 
a.到App1 ping App2

[root@docker compose]# docker-compose exec App1 bashroot@dd01fa7315ae:/# ping App2PING App2 (172.18.0.3): 56 data bytes64 bytes from 172.18.0.3: icmp_seq=0 ttl=64 time=0.059 ms64 bytes from 172.18.0.3: icmp_seq=1 ttl=64 time=0.108 ms64 bytes from 172.18.0.3: icmp_seq=2 ttl=64 time=0.062 ms64 bytes from 172.18.0.3: icmp_seq=3 ttl=64 time=0.062 ms
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成功ping通 
b.到App2 ping App1和App3

[root@docker compose]# docker-compose exec App2 bashroot@1905b2a875e3:/# ping App1PING App1 (172.18.0.2): 56 data bytes64 bytes from 172.18.0.2: icmp_seq=0 ttl=64 time=0.043 ms64 bytes from 172.18.0.2: icmp_seq=1 ttl=64 time=0.089 ms64 bytes from 172.18.0.2: icmp_seq=2 ttl=64 time=0.085 ms
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App2 to App3-成功

[root@docker compose]# docker-compose exec App3 bashroot@595f744e8634:/# ping App1PING App1 (172.31.213.13): 56 data bytes....#App3 to App1失败root@595f744e8634:/# ping App2PING App2 (172.31.213.13): 56 data bytes....#App3 to App2失败
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7.验证共享卷 
a. 在host /opt/conf/ 目录下新建nginx.conf 文件

[root@docker conf]# pwd/opt/conf[root@docker conf]# touch nginx.conf 
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b.登录到App1 和App2查看

[root@docker compose]# docker-compose exec App1 bashroot@49d702fc8606:/# cd /mmt root@49d702fc8606:/mnt# lsnginx.conf#成功挂载[root@docker compose]# docker-compose exec App2 bashroot@1d161428d4dd:/# cd /mntroot@1d161428d4dd:/mnt# lsnginx.conf#成功挂载
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c. 在App3中挂载文件到nginx 
修改docker-compose.yml App3:

App3:    image: nginx    volumes:      - ./app/web/:/usr/share/nginx/html    ports:      - "8082:80"    networks:      - "netName2"
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在host ./app/web 中添加 app3.html

[root@docker web]# app3.html[root@docker web]# lsapp3.html[root@docker web]# more app3.html <!DOCTYPE html><html>    <head>         <meta charset="utf-8">         <title>Welcome to leonyan's home, this is app3</title>     </head>   <body>   Welcome to leonyan's home, this is app3!   </body></html>[root@docker compose]# cd app/web/
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访问App3 nginx： 

8.总结 
本文演示了通过 Docker Compose进行多容器创建，以及容器间服务的管理，如网络隔离、卷数据共享。以及对容器的日常管理。