Docker和Nginx实现一个简单的负载均衡-工具盒子

当前使用centos7系统

1、安装nginx

参考https://blog.whsir.com/post-2078.html

2、docker拉取nginx镜像
docker pull nginx

|---|-------------------| | 1 | docker pull nginx |

3、创建两个目录
mkdir -p /data/demo1 mkdir -p /data/demo2

|-----|-------------------------------------------| | 1 2 | mkdir -p /data/demo1 mkdir -p /data/demo2 |

分别在两个目录下创建两个index.html，demo1下index.html内容为this is demo1，demo2下index.html内容为this is demo2

4、通过docker运行两个nginx的容器，并将目录映射到刚刚创建的目录中

容器中80端口映射到8081
docker run --name nginx-demo1 -d -p 8081:80 -v /data/demo1:/usr/share/nginx/html nginx

|---|----------------------------------------------------------------------------------------| | 1 | docker run --name nginx-demo1 -d -p 8081:80 -v /data/demo1:/usr/share/nginx/html nginx |

容器中80端口映射到8082
docker run --name nginx-demo2 -d -p 8082:80 -v /data/demo2:/usr/share/nginx/html nginx

|---|----------------------------------------------------------------------------------------| | 1 | docker run --name nginx-demo2 -d -p 8082:80 -v /data/demo2:/usr/share/nginx/html nginx |

5、修改当前主机nginx配置文件，设置upstream
http { ...... upstream whsirserver { server 192.168.0.80:8081 weight=1; server 192.168.0.80:8082 weight=1; } server { ...... location / { proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_pass http://whsirserver; } ...... } ...... }

|----------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | http { ...... upstream whsirserver { server 192.168.0.80:8081 weight=1; server 192.168.0.80:8082 weight=1; } server { ...... location / { proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_pass http://whsirserver; } ...... } ...... } |

6、保存退出重启nginx
nginx -t systemctl restart nginx

|-----|----------------------------------| | 1 2 | nginx -t systemctl restart nginx |

7、验证

此时浏览器输入当前IP或者域名，刷新页面时，就会看到this is demo1和this is demo2内容是来回切换的，即表示nginx负载均衡配置成功