Nginx

This check parses the information provided by the NGINX stub status module. If you have enabled that module, then the URL /nginx_status shows interesting information about the inner state of the web server when accessed from localhost. The agent plugin nginx_status fetches these information and processes it.

Step-by-step guide

After installing and configuring nginx you can follow this steps to monitor Nginx status.

1. Nginx stub status module

   Make sure that the server process is configured with the stub status module. Use the command:

   root@klappanas:~# nginx -V 2>&1 | grep -o with-http_stub_status_module   
   with-http_stub_status_module

2. Add a new server block configuration inside /etc/nginx/sites-enabled/default

3. restart nginx service

4. Now the Url 127.0.0.1:8081/nginx_status should be available

5. Configure nginx_status

   1. manually
   2. via Bakery

MK_CONFDIR=/etc/check_mk /usr/lib/check_mk_agent/plugins/nginx_status 

<<<nginx_status>>>
127.0.0.1 8081 Active connections: 1 
127.0.0.1 8081 server accepts handled requests
127.0.0.1 8081  380 380 380 
127.0.0.1 8081 Reading: 0 Writing: 1 Waiting: 0 

Debugging

Port Checking

root@klappanas:~# netstat -tulpen |grep 8081
tcp        0      0 0.0.0.0:8081            0.0.0.0:*               LISTEN      0          43044      1353/nginx: master  
tcp6       0      0 :::8081                 :::*                    LISTEN      0          43045      1353/nginx: master  

Nginx Service

root@klappanas:~# systemctl status nginx

Stub status module

root@klappanas:~# nginx -V 2>&1 | grep -o with-http_stub_status_module   
with-http_stub_status_module

Checking the status page

root@klappanas:~# wget -qO - http://127.0.0.1:8081/nginx_status
Active connections: 1 
server accepts handled requests
 398 398 398 
Reading: 0 Writing: 1 Waiting: 0

Related articles

• Page:
  How-to enable Nginx status monitoring