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Step-by-step guide

After installing and configuring nginx Nginx, you can follow this these 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:

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

   If the stub status module is not installed, you can follow this guide for the installation: https://www.tecmint.com/enable-nginx-status-page/
   
   

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

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   server { listen 8081; listen [::]:8081; server_name _; root /var/www/html; index index.html; location /nginx_status { stub_status on; access_log off; allow 127.0.0.1; deny all; } }

   .

3. restart

   Restart nginx service

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   root@linux:~# systemctl restart nginx

   .

4. Now the

   Url

   URL 127.0.0.1:8081/nginx_status should be available

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

   .

5. Configure nginx_status
   

   manually
   you need to

   
   

   • Manually
     You must install the agent plugin nginx_status into your agent's plugins directory (usually /usr/lib/check_mk_agent/plugins). The plugin tries to autodetect all running NGINX servers. If that fails

   for some reason you need to

   • , you must create the configuration file /etc/check_mk/nginx_status.cfg. Here is one example:

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   • language bash theme RDark

     servers = [{'address': '127.0.0.1', 'page': 'nginx_status', 'port': 8081, 'protocol': 'http'}]

     
     

   • via Bakery
     

   WATO - CONFIGURATION

   • Setup →

   Monitoring

   • Agents →

   Rules → NGINX

   • Windows, Linux, Solaris... → Agent rules →NGINX webservers (Linux)
     
     

     • Autodetect instances

   ,

   • • expect HTTPS on the following ports: nginx_status will try to autodetect all running NGINX servers.
       

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   • • Image Added

     • Specific list of instances: You can specify NGINX instances
       

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   • • Image Added

       
       

6. Test the plugin

   :

Now you can execute the plugin manually and see if it works:

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 

Check_MK will create one service for each web server.

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Debugging

Port Checking

root@klappanasroot@linux:~# 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@linux:~# systemctl status nginx

Stub status module

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

Checking the status page

root@klappanasroot@linux:~# 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

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