nginx安装nginx_upstream_check_module模块

转载自：https://blog.51cto.com/riverxyz/3928890

背景

tengin的nginx_upstream_check_module模块具有心跳检测功能，当发现某个节点不能访问的时候自动切换到另外一个节点，可惜这不是nginx官方自带的模块，需要自己编译

下载nginx

http://nginx.org/en/download.html

下载的地址是：https://nginx.org/download/nginx-1.22.1.tar.gz

下载模块

https://github.com/yaoweibin/nginx_upstream_check_module

https://github.com/yaoweibin/nginx_upstream_check_module/tags

https://github.com/yaoweibin/nginx_upstream_check_module/releases/tag/v0.4.0

从tag中下载：https://github.com/yaoweibin/nginx_upstream_check_module/archive/refs/tags/v0.4.0.zip

注意下载模块适用的nginx版本

进行安装Nginx和编译

tar -zxv -f nginx-1.22.1.tar.gz
unzip nginx_upstream_check_module-0.4.0.zip （从模块tag中下载后的文件名）
cd /usr/local/src/nginx-1.22.1
yum -y install patch
patch -p1 < /usr/local/src/nginx_upstream_check_module-0.4.0/check_1.20.1+.patch #这步很重要，打补丁
./configure --prefix=/usr/local/nginx --add-module=/usr/local/src/nginx_upstream_check_module-0.4.0 #加载模块使用绝对路径
make
make install

编辑配置文件

# vim /usr/local/nginx/conf/nginx.conf
worker_processes  1;
events {
    worker_connections  1024;
}
http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
    
    upstream cluster {
       server 127.0.0.1:80;
       server 127.0.0.1:5040;
       check interval=3000 rise=2 fall=5 timeout=1000 type=http;
       check_http_send "HEAD / HTTP/1.0\r\n\r\n";
       check_http_expect_alive http_2xx http_3xx;
    }
    server {
        listen       80;
        server_name  localhost;
        location / {
            proxy_pass http://cluster;
        }

        location /status {
            check_status;
            access_log off;
        }
    }
}