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Should I install nginx first and then add the health module?

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(*-*)浩Original
2019-06-10 15:59:062578browse

As we all know, nginx acts as a reverse proxy in the early stage. If the back-end server goes down, nginx cannot put this real server upstream, so there will still be requests forwarded to the back-end real server. Although nginx Proxy_next_upstream can be enabled in localtion to resolve error pages returned to the user.

Should I install nginx first and then add the health module?

But this will still forward the request to this server, and then forward it to other servers, thus wasting a forwarding. This time with the help of The nginx module, nginx_upstream_check_module, developed by the Taobao technical team, detects the health status of the back-end realserver. If the back-end server is unavailable, all requests will not be forwarded to this server.

Installation configuration

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

Unzip

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

nginx patch installation

[root@iZ233438q9fZ nginx-1.9.2]# patch -p0 <p><strong>Compilation configuration</strong></p><pre class="brush:php;toolbar:false">[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

nginx.conf health check configuration example

Should I install nginx first and then add the health module?

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], default tcp

- interval: health sent to the backend Interval for checking packets, unit (milliseconds)

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

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

- timeout: Timeout for backend health requests.

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

For more Nginx related technical articles, please visit Nginx usage tutorial column for learning!

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