The issue with slave connection is simple - it was caused by old PHP handler running on the server:
[root@vps02 ~]# php -v
PHP 5.6.30 (cli) (built: Jun 18 2020 04:02:28)
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
with the ionCube PHP Loader (enabled) + Intrusion Protection from ioncube24.com (unconfigured) v6.0.9, Copyright (c) 2002-2016, by ionCube Ltd.
To resolve this I have replaced current link with PHP 7:
[root@vps02 ~]# mv /usr/bin/php /usr/bin/backup-php2
[root@vps02 ~]# ln -s /usr/local/svmstack/php7/bin/php /usr/bin/php
Stopped service PHP 5.6.30 and started PHP 7 and restarted web server:
[root@vps02 ~]# service svmstack-fpm stop
Gracefully shutting down php-fpm done
[root@vps02 ~]# service svmstack-fpm7 restart
Gracefully shutting down php-fpm7 warning, no pid file found - php-fpm7 is not running ?
Starting php-fpm7 done
[root@vps02 ~]# service svmstack-nginx restart
2nd possible issue :
After a migration, or a change of the Master's IP, the allow.dat file could be out of date
Check the file and update it with New IP if necessary
[root@vps02 ~]# cat /usr/local/solusvm/data/allow.dat
