Docker实现haproxy和nginx的负载均衡

获取docker-compose,并添加该命令至可执行目录

mv docker-compose-Linux-x86_64-1.22.0 /usr/local/bin/docker-compose
chmod 755 /usr/local/bin/docker-compose 

获取基础镜像haproxy.tar、nginx.tar并加载

docker load -i nginx.tar 
docker load -i haproxy.tar 

创建目录，编写负载均衡调度策略

mkdir -p /mnt/compose
cd /mnt/compose/
vim docker-compose.yml

文件编辑内容如下：
//网页web1及其相应的挂载点及其暴露端口

web1:
      image: nginx:latest
      expose:
              - 80
      volumes:
              - ./web1:/usr/share/nginx/html
//web2同web1
web2:
      image: nginx:latest
      expose:
              - 80
      volumes:
              - ./web2:/usr/share/nginx/html
//添加haproxy
haproxy:
         image: haproxy:latest
         volumes:
                 - ./haproxy/haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg:ro
         links:
                 - web1
                 - web2
         ports:
                 - "80:80"
         expose:
                 - 80

创建web1、web2网页主文件

mkdir web1 web2
echo web1 >web1/index.html
echo web2 >web2/index.html

创建haproxy目录，添加haproxy的配置文件（Version 2）

mkdir haproxy
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
        default_backend web_backends
backend web_backends
        balance roundrobin
        server server1 web1:80 check
        server server2 web2:80 check

启动

docker-compose up -d

测试

curl 172.25.33.2

关闭web1进行测试

docker container stop compose_web1_1

测试

curl 172.25.33.2