【高可用HA】Nginx (1) —— Mac下配置Nginx Http负载均衡(Load Balancer)之101实例

【高可用HA】Nginx (1) —— Mac下配置Nginx Http负载均衡(Load Balancer)之101实例

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nginx版本: nginx-1.9.8

参考来源:

nginx.org

【高可用HA】Apache (2) —— Mac下安装多个Apache Tomcat实例

Nginx on Mac OS X Snow Leopard in 2 Minutes

51cto：Nginx+Tomcat负载均衡配置

csdn：Nginx+Tomcat负载均衡配置

iteye：图文解说：Nginx+tomcat配置集群负载均衡

安装

首先

从nginx官方网站下载

编译配置

1. 执行命令

   $ ./configure --prefix=/Users/Richard/Documents/Dev/servers/cluster/nginx/node-a --with-http_ssl_module

   执行结果末尾几行

   ...
   nginx error log file: "/Users/Richard/Documents/Dev/servers/cluster/nginx/node-a/logs/error.log"
   nginx http access log file: "/Users/Richard/Documents/Dev/servers/cluster/nginx/node-a/logs/access.log"
   nginx http client request body temporary files: "client_body_temp"
   nginx http proxy temporary files: "proxy_temp"
   nginx http fastcgi temporary files: "fastcgi_temp"
   nginx http uwsgi temporary files: "uwsgi_temp"
   nginx http scgi temporary files: "scgi_temp"    

2. 执行命令

   $ make

   执行结果末尾几行

   ...
   objs/src/http/modules/ngx_http_upstream_zone_module.o \
   objs/ngx_modules.o \
   -lpcre -lssl -lcrypto -lz
   /Library/Developer/CommandLineTools/usr/bin/make -f objs/Makefile manpage
   sed -e "s|%%PREFIX%%|/Users/Richard/Documents/Dev/servers/cluster/nginx/node-a|" \
   -e "s|%%PID_PATH%%|/Users/Richard/Documents/Dev/servers/cluster/nginx/node-a/logs/nginx.pid|" \
   -e "s|%%CONF_PATH%%|/Users/Richard/Documents/Dev/servers/cluster/nginx/node-a/conf/nginx.conf|" \
   -e "s|%%ERROR_LOG_PATH%%|/Users/Richard/Documents/Dev/servers/cluster/nginx/node-a/logs/error.log|" \
   < man/nginx.8 > objs/nginx.8

3. 执行命令

   $ sudo make install

   执行结果末尾几行

   test -d '/Users/Richard/Documents/Dev/servers/cluster/nginx/node-a/logs'        || mkdir -p '/Users/Richard/Documents/Dev/servers/cluster/nginx/node-a/logs'
   test -d '/Users/Richard/Documents/Dev/servers/cluster/nginx/node-a/logs' ||         mkdir -p '/Users/Richard/Documents/Dev/servers/cluster/nginx/node-a/logs'
   test -d '/Users/Richard/Documents/Dev/servers/cluster/nginx/node-a/html'        || cp -R html '/Users/Richard/Documents/Dev/servers/cluster/nginx/node-a'
   test -d '/Users/Richard/Documents/Dev/servers/cluster/nginx/node-a/logs' ||         mkdir -p '/Users/Richard/Documents/Dev/servers/cluster/nginx/node-a/logs'

4. 修改服务器启动配置

   • 将端口修改成85（与其他文章中httpd的端口区分），并修改location配置Proxy

     server {
     listen 85;
     server_name localhost;

     #charset koi8-r;
     
     #access_log  logs/host.access.log  main;
     
     # location / {
     #     root   html;
     #     index  index.html index.htm;
     # }
     
     location / {  
         proxy_connect_timeout   3;  
         proxy_send_timeout      30;  
         proxy_read_timeout      30;  
         proxy_pass http://localhost;  
     }

     ...

   • 增加转发路由的配置，并指向之前配好的两台Tomcat服务器

     upstream localhost {  
         #根据ip计算将请求分配各那个后端tomcat，许多人误认为可以解决session问题，其实并不能。  
         #同一机器在多网情况下，路由切换，ip可能不同  
         #ip_hash;   
         server localhost:8081;  
         server localhost:8082;  
     }           

运行

执行命令

$ ./sbin/nginx

提示错误

nginx: [alert] could not open error log file: open() "/Users/Richard/Documents/Dev/servers/cluster/nginx/node-a/logs/error.log" failed (13: Permission denied)
2015/12/09 16:26:55 [emerg] 16550#0: mkdir() "/Users/Richard/Documents/Dev/servers/cluster/nginx/node-a/client_body_temp" failed (13: Permission denied)    

*这是因为nginx没有相应的权限

运行命令授权或者以sudo运行

$ sudo ./sbin/nginx

启动

$ sudo ./sbin/nginx -s stop 

测试

用浏览器访问localhost:85，页面中会交替出现"Node-A!!"和"Node-B!!"

结束