Applicable to:
- SolusVM
Symptoms
Master SolusVM fails to connect to the slave node: Connection Failed Debug Data: ERROR:4
SolusVM Master and slave have been updated to stable version 1.21.01
SolusVM slave server is running on lighttpd:
# netstat -tuxnlp | grep 6767
Cause
Not supported old PHP handler on the slave server. The issue can occur after upgrade to the latest SolusVM releases
Resolution
Note: The article is applicable for the cases with ERROR: 4 code error only. If the code error is different, search for the solution in this hub article
Note: If the web server is based on lighttpd software, it is recommended to switch to svmstack-nginx
- Connect to the slave server via SSH
- Make php alias to use SolusVM compiled PHP:
# mv /usr/bin/php /usr/bin/backup-php
# ln -s /usr/local/svmstack/php/bin/php /usr/bin/php
- Switch from lighttpd to svmstack-nginx service:
- install repository
# yum install solusvm-release
- shutdown lighttpd service
# service lighttpd stop
# chkconfig lighttpd off
- install nginx and legacy configuration file
# yum install svmstack-nginx svmstack-nginx-legacy-slave-config
- start new service
# service svmstack-nginx restart
# service svmstack-fpm restart
For more details check the following article
- install repository
Also, the following article can be useful in case of blank page in SolusVM web interface:
SolusVM getting a blank page after the update to 1.20.09 or higher on CentOS 5 node
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