PHP scripts monitor Nginx 502 errors and automatically restart php-fpm and nginxphp-fpm

PHP scripts monitor Nginx 502 errors and automatically restart php-fpm and nginxphp-fpm

Recently, Nginx 502 Bad Gateway appears on the server from time to time. If it is okay on the computer, what should I do if it goes out in the middle of the night?
It doesn't matter. Write a script to check the service status. If an exception is found, it will be restarted automatically.
Automatic Restart script:
Copy codeThe Code is as follows:
<? Php
$ Url = 'HTTP: // blog.rebill.info ';
$ Cmd = '/usr/local/php/sbin/php-fpm restart ';

For ($ I = 0; $ I <5; $ I ++ ){
$ Exec = "curl connect-timeout 3-I $ url 2>/dev/null ";
$ Res = shell_exec ($ exec );

If (stripos ($ res, '2014, 502 Bad gateway ')! = False ){
Shell_exec ($ cmd );
Exit ();
}
}

The principle is to use curl to obtain the HTTP header and execute the command to restart php-fpm when the 502 status code is found.
The url and cmd are changed to your own according to the actual situation. Then run the command once a minute in crontab.
Copy codeThe Code is as follows:
*/1 *****/usr/bin/php/root/crontab/nginx502.php

Success!