反向代理负载均衡系列之Nginx

通

Nginx 源码编译安装，使其支持4层，并监听80端口

[root@lb-node1 ~]# useradd -s /sbin/nologin -M www
[root@lb-node1 ~]# cd /usr/local/src/
[root@lb-node1 src]# wget http://nginx.org/download/nginx-1.10.2.tar.gz
[root@lb-node1 src]# tar xf nginx-1.10.2.tar.gz
[root@lb-node1 src]# cd nginx-1.10.2
[root@lb-node1 nginx-1.10.2]# ./configure --prefix=/usr/local/nginx-1.10.2 \
--user=www --group=www --with-http_ssl_module \
--with-http_stub_status_module --with-file-aio --with-stream
[root@lb-node1 nginx-1.10.2]# make && make install
[root@web-node1 ~]# ln -s /usr/local/nginx-1.10.2/ /usr/local/nginx
## 测试配置并启动Nginx
[root@lb-node1 ~]# /usr/local/nginx/sbin/nginx -t
nginx: the configuration file /usr/local/nginx-1.10.2/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx-1.10.2/conf/nginx.conf test is successful
[root@lb-node1 ~]# /usr/local/nginx/sbin/nginx

配置Nginx反向代理

##http段配置
 upstream web-cluster {
 # ip_hash;
 server 192.168.90.201:8080 weight=1 max_fails=3 fail_timeout=3;
 server 192.168.90.202:8080 weight=1 max_fails=3 fail_timeout=3;
 }
 server {
 listen 80;
 server_name 192.168.90.203;
 location / {
 proxy_pass http://web-cluster;
 include proxy.conf;
 }
 }

测试代理

[root@lb-node1 ~]# curl http://192.168.90.203/
web-node1.com
[root@lb-node1 ~]# curl http://192.168.90.203/
web-node2.com
[root@lb-node1 ~]# curl http://192.168.90.203/
web-node1.com
[root@lb-node1 ~]# curl http://192.168.90.203/
web-node2.com

通过分组方式，以及User-agent实现不同代理

#http段配置
 upstream static-cluster {
 server 192.168.90.201:8080 weight=1 max_fails=3 fail_timeout=3;
 }
 upstream dynamic-cluster {
 server 192.168.90.202:8080 weight=1 max_fails=3 fail_timeout=3;
 }
 upstream default-cluster {
 server 192.168.90.202:8080 weight=1 max_fails=3 fail_timeout=3;
 }
#需要配置本地host解析测试
 server {
 listen 80;
 server_name nginx.xuliangwei.com;
 location / {
 if ($http_user_agent ~* "Firefox"){
 proxy_pass http://static-cluster;
 }
 if ($http_user_agent ~* "Chrome") {
 proxy_pass http://dynamic-cluster;
 }
 proxy_pass http://default-cluster;
 }
 }