docker-compose 案例

官网示例：

安装wordpress

version: ""　　　　　　
services:
   db:
     image: mysql:5.7
     volumes:
       - db_data:/var/lib/mysql
     restart: always
     environment:
       MYSQL_ROOT_PASSWORD: wordpress
       MYSQL_DATABASE: wordpress
       MYSQL_USER: wordpress
       MYSQL_PASSWORD: wordpress

   wordpress:
     depends_on:
       - db
     image: wordpress:latest
     ports:
       - "8001:80"
     restart: always
     environment:
       WORDPRESS_DB_HOST: db:3306
       WORDPRESS_DB_USER: wordpress
       WORDPRESS_DB_PASSWORD: wordpress
volumes:
    db_data:

运行 docker-compose up -d Compose 就会拉取镜像再创建我们所需要的镜像，然后启动 wordpress 和数据库容器。 接着浏览器访问 127.0.0.1:8000 端口就能看到 WordPress 安装界面了。

其他示例

示例一，安装haproxy+nginx

目录结构：

[root@bogon ~]# tree haproxy/
haproxy/
├── docker-compose.yml
├── haproxy
│   └── haproxy.cfg
├── httpd
│   ├── Dockerfile
│   ├── docker.repo
│   └── index.html
├── nginx1
│   └── index.html
└── nginx2
    └── index.html

4 directories, 7 files

docker-compose.yml

web1:
    build: ./httpd
    expose:
       - 80

web2:
    image: nginx:latest
    volumes:
        - ./nginx1:/usr/share/nginx/html
    expose:
        - 80

web3:
    image: nginx
    volumes:
        - ./nginx2:/usr/share/nginx/html

haproxy:
    image: haproxy

    volumes:
        -  ./haproxy/haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg:ro
    links:
        - web1
        - web2
        - web3

    ports:
       - "8888:80"
    expose:
        - 80

[root@bogon haproxy]# cat haproxy/haproxy.cfg
global
    log 127.0.0.1 local0
    log 127.0.0.1 local1 notice
defaults
    log global
    mode http
    option httplog
    option dontlognull
    timeout connect 5000ms
    timeout client 50000ms
    timeout server 50000ms
    stats uri /status
frontend balancer
    bind 0.0.0.0:80
    mode http
    default_backend web_backends
backend web_backends
    mode http
    option forwardfor
    balance roundrobin
    server weba web1:80 check
    server webb web2:80 check
    server webc web3:80 check
    option httpchk GET /
    http-check expect status 200

[root@bogon haproxy]# cat httpd/Dockerfile
FROM bluedata/rhel7
EXPOSE 80
COPY docker.repo /etc/yum.repos.d/
RUN yum install -y httpd
ADD index.html /var/www/html
CMD ["/usr/sbin/httpd","-D","FOREGROUND"]
[root@bogon haproxy]# 

[root@bogon haproxy]# cat httpd/docker.repo
[dockerrepo]
name=Docker Repository
baseurl=https://yum.dockerproject.org/repo/main/centos/7/
enabled=1
gpgcheck=1
gpgkey=https://yum.dockerproject.org/gpg

[root@bogon haproxy]# cat httpd/index.html
test
[root@bogon haproxy]# 

haproxy目录执行docker-compose up -d ,完成后通过docker ps -a 查看

[root@bogon haproxy]# docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                  NAMES
820a8375c235        haproxy             "/docker-entrypoin..."   About an hour ago   Up About an hour    0.0.0.0:8888->80/tcp   haproxy_haproxy_1
8f91ec7e70dc        nginx:latest        "nginx -g 'daemon ..."   About an hour ago   Up About an hour    80/tcp                 haproxy_web2_1
1b083f53e569        nginx               "nginx -g 'daemon ..."   About an hour ago   Up About an hour    80/tcp                 haproxy_web3_1
369c7dc764d8        haproxy_web1        "/usr/sbin/httpd -..."   About an hour ago   Up About an hour    80/tcp                 haproxy_web1_1

访问 ip:8888和ip:8888/status