标签：nginx 负载均衡
反向代理（Reverse Proxy）方式是指以代理服务器来接受internet上的连接请求，然后将请求转发给内部网络上的服务器，并将从服务器上得到的结果返回给internet上请求连接的客户端，此时代理服务器对外就表现为一个反向代理服务器。
环境准备:
| 主机名 | IP地址 | 角色 | 系统 |
|---|---|---|---|
| web-node1.com | eth0:192.168.90.201 | web-node1节点 | CentOS7.2 |
| web-node2.com | eth0:192.168.90.202 | web-node2节点 | CentOS7.2 |
| lb-node1.com | eth0:192.168.90.203 | Nginx反向代理 | CentOS7.2 |
在两台web-node节点中均使用Yum安装一个Apache用于做真实机，监听8080端口
web-node1.com部署
[root@web-node1 ~]# rpm -ivh http://mirrors.aliyun.com/epel/epel-release-latest-7.noarch.rpm [root@web-node1 ~]# yum install -y gcc glibc gcc-c++ make screen tree lrzsz ##部署web-node1 httpd服务 [root@web-node1 ~]# yum install -y httpd [root@web-node1 ~]# sed -i ‘s/Listen 80/Listen 8080/g‘ /etc/httpd/conf/httpd.conf [root@web-node1 ~]# systemctl start httpd [root@web-node1 ~]# echo "web-node1.com" > /var/www/html/index.html [root@web-node1 ~]# curl http://192.168.90.201:8080/ web-node1.com
web-node2.com部署
[root@web-node1 ~]# rpm -ivh http://mirrors.aliyun.com/epel/epel-release-latest-7.noarch.rpm [root@web-node1 ~]# yum install -y gcc glibc gcc-c++ make screen tree lrzsz ##部署web-node2 httpd服务 [root@web-node1 ~]# yum install -y httpd [root@web-node1 ~]# sed -i ‘s/Listen 80/Listen 8080/g‘ /etc/httpd/conf/httpd.conf [root@web-node1 ~]# systemctl start httpd [root@web-node1 ~]# echo "web-node2.com" > /var/www/html/index.html [root@web-node1 ~]# curl http://192.168.90.202:8080/ web-node2.com
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
##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
2.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.jiege.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;
}
}测试分组
##默认浏览器交给default处理[root@lb-node1 ~]# curl http://nginx.jiege.com web-node2.com 火狐浏览器交给static-cluster处理 谷歌浏览器交给dynamic-cluster处理 配置ssh以及msql反向代理
stream {
upstream ssh_proxy {
hash $remote_addr consistent;
server 192.168.90.201:22;
}
upstream mysql_proxy {
hash $remote_addr consistent;
server 192.168.90.202:3306;
}
server {
listen 2222;
proxy_connect_timeout 1s;
proxy_timeout 300s;
proxy_pass ssh_proxy;
}
server {
listen 3333;
proxy_connect_timeout 1s;
proxy_timeout 300s;
proxy_pass mysql_proxy;
}
}2222端口代理至于node1的SSH、3333端口代理至于node2的MYSQL
## 测试连接ssh
[root@lb-node1 ~]# ssh -p2222 root@192.168.90.203
root@192.168.90.203‘s password:
Last login: Wed Oct 19 11:53:04 2016 from 192.168.80.143
[root@web-node1 ~]#
## 测试连接mysql
[root@lb-node1 ~]# mysql -h192.168.90.203 -uroot -p1 -P3333
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 273
Server version: 5.5.47-MariaDB MariaDB Server
Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.
Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.
MariaDB [(none)]>
标签：nginx 负载均衡
原文地址：http://jiege3324.blog.51cto.com/11639123/1940523
