Tengine ngx_http_sysguard_module 过载保护模块使用

简介

Tengine是由淘宝网发起的Web服务器项目。它在Nginx的基础上，针对大访问量网站的需求，添加了很多高级功能和特性。Tengine的性能和稳定性已经在大型的网站如淘宝网，天猫商城等得到了很好的检验。它的最终目标是打造一个高效、稳定、安全、易用的Web平台。

运行环境：Centos 6.4 x86_64

软件版本：tengine-1.5.2

软件下载地址：wget http://tengine.taobao.org/download/tengine-1.5.2.tar.gz

1.编译安装tengine

[[email protected] ~]# yum -y install libxslt-devel gd-devel lua-devel geoip-devel
[[email protected] ~]# groupadd -r nginx
[[email protected] ~]# useradd -r -g nginx nginx
[[email protected] ~]# tar zxvf tengine-1.5.2.tar.gz
[[email protected] ~]# cd tengine-1.5.2
[[email protected] tengine-1.5.2]# ./configure \
> --prefix=/usr/local/nginx \
> --conf-path=/etc/nginx/nginx.conf \
> --error-log-path=/var/log/nginx/error.log \
> --http-log-path=/var/log/nginx/access.log \
> --pid-path=/var/run/nginx/nginx.pid  \
> --lock-path=/var/lock/nginx.lock \
> --user=nginx \
> --group=nginx \
> --enable-mods-shared=all
[[email protected] tengine-1.5.2]# make && make install
[[email protected] ~]# ls /usr/local/nginx/modules/ | grep sys
ngx_http_sysguard_module.so
[[email protected] ~]# /usr/local/nginx/sbin/nginx -c /etc/nginx/nginx.conf
[[email protected] ~]# ps aux | grep nginx
root     25508  0.0  0.0  83684  1252 ?        Ss   13:58   0:00 nginx: master process /usr/local/nginx/sbin/nginx -c /etc/nginx/nginx.conf
nginx    25509  0.0  0.0  84088  1780 ?        S    13:58   0:00 nginx: worker process                         
root     25547  0.0  0.0 103248   824 pts/0    S+   14:02   0:00 grep nginx

2.编译/etc/nginx/nginx.conf 动态加载ngx_http_sysguard_module 模块

[[email protected] ~]# vi /etc/nginx/nginx.conf
http {
dso {
    load ngx_http_sysguard_module.so;
}
}

3.在server段中配置过载保护：

server {
        listen       80;
        server_name  192.168.30.117;
        sysguard on;
        sysguard_load load=0.1 action=/loadlimit;
        sysguard_mem swapratio=20% action=/swaplimit;
        sysguard_mem free=100M action=/freelimit;
        #charset koi8-r;
        #access_log  logs/host.access.log  main;
        root   /var/www/html;
        index  index.html index.htm;
        location / {
        }
        location /loadlimit {
           return 403;
        }

4.重启tengine

[[email protected] ~]# /usr/local/nginx/sbin/nginx -s reload

5.验证过载保护功能

在测试机发起压力测试：
[[email protected] ~]# ab -c 5000 -n 20000 http://192.168.30.117/index2.html
观察服务器负载：
[[email protected] ~]# htop

继续访问页面发现403：

6.tengine过载保护功能生效