preface

Supervisor is a client/server system that allows its users to control many processes on unix-like operating systems. (Official explanation)

In simple terms, it is a tool to monitor the execution of scripts, but it can be unified management, laravel queue documentation also has related methods of use, for example

• Start, restart, close, and monitor logs of scheduled scripts
• Swoole startup, restart, shutdown, and log monitoring (most of swoole’s features are known to run only in cli)
• Redis startup, restart, shutdown, and log monitoring (Redis itself does not provide a phpMyAdmin-like backend visualization tool)
• Queues in Laravel, some automated scripts, workman scripts, etc

It is common to use &test.sh to ensure that it runs in the background, but in many cases it is not possible to monitor scripts personally. You may need your Supervisor to help you. Think of it as a visual administrative background for your Unix system. Here’s how powerful it can be.

The installation

There are many ways to install Supervisor, and I recommend the simplest and easiest one to install

apt-get -y install python-setuptools
easy_install supervisor
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As you can see, two commands complete the installation

configuration

When the Supervisor is installed, run echo_supervisord_conf. This will print a sample Supervisor configuration file to your terminal. As long as you can see the printed content of the configuration file.

The Supervisor does not automatically generate configuration files.

Run the echo_supervisord_conf > /etc/supervisord.conf command to generate the configuration file.

Partial configuration file information table

run

To start the Supervisor, load the configuration file

supervisord -c /etc/supervisor/supervisord.conf
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The stop command is

supervisorctl shutdown
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Reload the configuration file

supervisorctl reload
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Supervisor starts each process configuration file with [program:[your_cli_name]. Your_cli_name is the name of your process. The name is displayed in the Supervisor daemon tool and the Supervisor CLI command output. Let’s take running phP-fpm as an example

[program:php7]
command=php-fpm
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Oh, it’s so simple. Not too much nonsense. Or run a piece of shell.

[program:echo]
command=sh echo.sh

--------------------------------

echo.sh

your_name="my name zhangsan" 
echo $your_name

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Of course, the Laravel queue is still simple

[program:laravel-worker]
command=php /home/forge/app.com/artisan queue:work sqs --sleep=3 --tries=3
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Of course, this is just a simple demo to get you started, configuration scripts are not just command commands. Concrete is the official document www.supervisord.org/configurati…

The background

Background management provided by the Supervisor is relatively simple

The general functions are restart, start, stop process, print logs, clear logs and so on. Basically so a few simple functions, of course, there is no downtime alarm, log alarm of what. However, the powerful Supervisor provides us with an interface 😄

interface

Access to all basic information through the API, such as process list, the status of a process, process logs. Including process restart, stop, start and other operations, the Supervisor is completely integrated into the internal monitoring background, there is no problem.

Details please click www.supervisord.org/api.html website Api documentation

The script

Finally, I gave my friends a simple script for learning the Supervisor

#! /bin/bash
set -x

case $1 in
    'sp')
    		if [[ $2 == 'start' ]]; then
    			"supervisord -c /etc/supervisor/supervisord.conf"
    		elif [[ $2 == 'stop' ]]; then
    			"supervisorctl shutdown"
    		elif [[ $2 == 'restart' ]]; then
    			"supervisorctl shutdown"
    			"supervisord -c /etc/supervisor/supervisord.conf"
    		elif [[ $2 == 'reload' ]]; then
    			"supervisorctl reload"
    		fi
    	;;
esac
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You can use this simple script to quickly start, restart, and shut down the Supervisor

Sh sp start // Start sh test.sh sp restart // RestartCopy the code

Thank you

Thank you for reading this. I hope this chapter helped you. thank you

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