How to use the command "supervisord" (with examples)

Supervisord is a server part of the Supervisor system, which is used for controlling processes on UNIX-like operating systems. It is primarily managed via a configuration file. Supervisord is started with a specified configuration file or in the foreground.

Use case 1: Start supervisord with specified configuration file

Code:

supervisord -c path/to/file

Motivation: Starting supervisord with a specified configuration file allows you to easily manage and control multiple processes on your UNIX-like system. By defining processes and their configurations in the configuration file, you can start and monitor them all at once.

Explanation:

• supervisord: The command to start supervisord.
• -c path/to/file: Specifies the path to the configuration file. Replace path/to/file with the actual path of your configuration file.

Example output:

2022-11-10 10:00:00,003 INFO supervisord started with pid 12345

Use case 2: Run supervisord in the foreground

Code:

supervisord -n

Motivation: Running supervisord in the foreground is useful when you want to debug or troubleshoot your processes. By running it in the foreground, you can see the logs and any error messages directly on your terminal.

Explanation:

• supervisord: The command to start supervisord.
• -n: Runs supervisord in the foreground.

Example output:

2022-11-10 10:00:00,003 INFO supervisord started with pid 12345
2022-11-10 10:00:01,001 INFO spawned: process1 with pid 54321
2022-11-10 10:00:02,002 INFO spawned: process2 with pid 67890
...

Conclusion:

Using the supervisord command with the specified use cases allows for easy management and control of processes on UNIX-like operating systems. Starting supervisord with a specified configuration file provides a convenient way to define and manage processes, while running it in the foreground allows for easy debugging and troubleshooting.