Applicable to:
- SolusVM
Symptoms
Attempt to reset password for KVM VPS in SolusVM > Virtual Servers > VPS > Root/Admin Password fails:
SVM_ERROR: 502 gateway error
There are high load average values (~50) of the node utilization on Dashboard > Nodes > node_name page
Cause
PHP-FPM backend service is not responsive due to high load.
Resolution
There are several possible causes for high load on KVM node:
- Number of virtual machines on the node too big and it exceeds the node's resource capacity.
Solution: Use migration feature and move part of virtual machines to another node that has more resources - There are several virtual machines under heavy load and corresponding qemu-kvm processes consumes a lot of resources.
Solution: Limit resource consumption for VPS based on this article -
AutoFTP backup is running on the node and it causes high load
Solution: Change a time frame for scheduled backup task when the server usage is minimal - PHP-FPM service on the slave and master node requires adjustment
Solution: Check/var/log/svmstackfpm7/error.log
log file for errors related to PHP-FPM backend. Consider additional tuning for service via/usr/local/svmstack/fpm7/services/web.conf
configuration file.
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