Nginx安装与负载均衡配置

1、CentOS下需要的依赖包

yum install gcc-c++ -y 
yum install pcre pcre-devel -y  
yum install zlib zlib-devel -y  
yum install openssl openssl-devel  -y

2、下载nginx源码

wget http://nginx.org/download/nginx-1.13.1.tar.gz
wget https://bitbucket.org/nginx-goodies/nginx-sticky-module-ng/get/08a395c66e42.zip
wget https://codeload.github.com/yaoweibin/nginx_upstream_check_module/zip/master

解压三个文件可得到

nginx-1.13.1
nginx-goodies-nginx-sticky
nginx_upstream_check_module-master

3、编译并安装nginx

./configure --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module  --add-module=../nginx-goodies-nginx-sticky --add-module=../nginx_upstream_check_module-master

指定安装的目录，及依赖的组件源码

编译时出现异常

ngx_http_sticky_misc.c: In function 「ngx_http_sticky_misc_md5」:
ngx_http_sticky_misc.c:152:15: ERROR：「MD5_DIGEST_LENGTH」 undeclared (first use in this function)
   u_char hash[MD5_DIGEST_LENGTH];

解决方式就是修改在你下载解压缩之后的sticky模块文件夹中的ngx_http_sticky_misc.c文件
将这两个模块 <openssl/sha.h> and <openssl/md5.h>包含到文件ngx_http_sticky_misc.c

#include <nginx.h>
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#include <ngx_md5.h>
#include <ngx_sha1.h>
#include <openssl/sha.h>
#include <openssl/md5.h>


#include "ngx_http_sticky_misc.h"

安装

make && make install

4、启动nginx

/usr/local/nginx/sbin/nginx

停止

/usr/local/nginx/sbin -s stop

5、负载均衡的配置

vim conf/nginx.conf

worker_processes  1;

events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;

    sendfile        on;
    keepalive_timeout  65;

    log_format  main  '$http_x_forwarded_for - $remote_user [$time_local] "$request" '
               '$status $body_bytes_sent "$http_referer" '
                '"$http_user_agent"  $request_time $remote_addr';    

    server
    {
       listen       80;
       server_name  hadoop4.ganymede.com;
       index  index.jsp index.html index.htm;
       location /mdm
    {
        proxy_next_upstream http_502 http_504 error timeout invalid_header;
        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://mdm_balance;
    }
    access_log  /data/logs/nginx/a_access.log main;
    error_log   /data/logs/nginx/a_error.log;
    }

    upstream mdm_balance{
     sticky;
     server   hadoop4:8086 weight=1 max_fails=2 fail_timeout=150s;
     server   hadoop5:8086 weight=2 max_fails=2 fail_timeout=150s;
    }

}

6、修改配置后reload服务

/usr/local/nginx/sbin/nginx -t -c /usr/local/nginx/conf/nginx.conf
/usr/local/nginx/sbin/nginx -s reload -c /usr/local/nginx/conf/nginx.conf

Nginx安装与负载均衡配置

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