Implementing Supervisor Process Monitoring with Open Telemetry
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Anshul Kichara

Anshul Kichara @anshul_kichara

About: Hi, I'm anshul, a DevOps consultant at OpsTree Solutions. We specialize in helping businesses improve their software development and delivery processes through the power of DevOps.

Joined:
Jan 23, 2024

Implementing Supervisor Process Monitoring with Open Telemetry

Publish Date: Jun 25
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In this blog, I’ll Walk you through how I set up a custom monitoring system for Supervisor-managed processes like Nginx and Apache2, this setup will allow you to track the health and performance of processes running under Supervisor in real time.

What Is Supervisor?

Supervisor is a process control system that allows users to manage and monitor numerous processes.

Step 1 Install Supervisor
you can install it using this command:

sudo apt update 
sudo apt install supervisor
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*Step 2 Configure Supervisor for Nginx and Apache
*

  • Once Supervisor is installed, you’ll need to create configuration files for Nginx and Apache.

For Nginx

  • Create a file in this path in this format /etc/supervisor/conf.d/nginx.conf/.

One-line Summary for NGINX (Supervisor Configuration)

  • This Supervisor configuration enables effective management of the NGINX service by running it in the foreground, ensuring automatic startup, handling unexpected failures through automatic restarts, and directing logs to specified output and error files. 
[program:nginx]
command=/usr/sbin/nginx -g "daemon off;" 
autostart=true 
autorestart=true 
stderr_logfile=/var/log/nginx.err.log 
stdout_logfile=/var/log/nginx.out.log
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For Apache

  • Create another file on this path in this format /etc/supervisor/conf.d/apache2.conf.

One-line Summary for Apache (Supervisor Configuration):

  • This Supervisor configuration enables effective management of the Apache service by running it in the foreground, ensuring automatic startup, handling failures through automatic restarts, and storing standard output and error logs in specified files. 
[program:apache2]
command=/usr/sbin/apachectl -D FOREGROUND
autostart=true
autorestart=true
stderr_logfile=/var/log/apache2.err.log
stdout_logfile=/var/log/apache2.out.log
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Step 3 Reload Supervisor and Start Services

  • Once the configurations are created, updated, we need to reload Supervisor to apply these changes and start both services. 
sudo supervisorctl reread 
sudo supervisorctl update 
sudo supervisorctl start nginx 
sudo supervisorctl start apache2
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Step 4 Check the Status of Nginx and Apache.
Now check if the Supervisor is managing Nginx and Apache or not. If it does you will see the output like below.

sudo supervisorctl status
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  • You should see output like: 
nginx     RUNNING   pid  1234, uptime  0:01:10
apache2   RUNNING   pid  5678, uptime  0:01:10
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*Step 5 Create a Python Script for Monitoring with Open Telemetry and Prometheus. *

  • I have created a Python script to gather performance metrics of the processes under Supervisor.

You can check more info about: How does OpenTelemetry work with Supervisor?.
**- AWS Consulting.

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