Nginx installs the health check module nginx_upstream_check_module

With the growth of business, more and more back-end nodes of the load balancer on nginx are deployed, and the running status of the back-end nodes needs to be monitored. Therefore, Ali's health detection module nginx_upstream_check_module is introduced, which can be used to detect the real server's back-end realserver. health status.

 

1. Download

     1、nginx

           http://nginx.org/download/nginx-1.9.2.tar.gz

     2、nginx_upstream_check_module

           http://github.com/yaoweibin/nginx_upstream_check_module

 

 2. Installation configuration

    1. File list information

[root@iZ233438q9fZ upload]# ll
drwxr-xr-x 6 ftpuser ftp       4096 Aug 19 10:04 nginx_upstream_check_module
drwxr-xr-x 8    1001 1001      4096 Jun 16  2015 nginx-1.9.2.tar.gz

      2. Decompression

[root@iZ233438q9fZ upload]# tar -zxvf nginx-1.9.2.tar.gz
[root@iZ233438q9fZ upload]# cd nginx-1.9.2

 

    3. nginx patch installation

[root@iZ233438q9fZ nginx-1.9.2]# patch -p0 < /var/ftp/upload/nginx_upstream_check_module/check_1.9.2+.patch
patching file src/http/modules/ngx_http_upstream_hash_module.c
patching file src/http/modules/ngx_http_upstream_ip_hash_module.c
patching file src/http/modules/ngx_http_upstream_least_conn_module.c
patching file src/http/ngx_http_upstream_round_robin.c
patching file src/http/ngx_http_upstream_round_robin.h

   

 

    4. Compile and configure

[root@iZ233438q9fZ nginx-1.9.2]# ./configure --add-module=/var/ftp/upload/nginx_upstream_check_module --prefix=/usr/local/server/nginx
[root@iZ233438q9fZ nginx-1.9.2]# make && make install

 

 3. nginx.conf health check configuration example

 
 
Parameter Description:

- check_status: [html|csv|json], default html

- check_http_send: Specify the detected http access address, default /

- type：[tcp|http|ssl_hello|mysql|ajp]，默认tcp

- interval: interval for sending health check packets to the backend, in milliseconds

- fall(fall_count): If the number of consecutive failures reaches fall_count, the server is considered down.

- rise(rise_count): The server is considered up if the number of consecutive successes reaches the rise_count.

- timeout: The timeout for the backend health request.

 

PS: If it keeps showing failure, please check if there is index.jsp or index.html in the project root directory