Summary
Upon trying to set NTP servers in vStor, an error is displayed due to missing chronyd service
Symptoms
When trying to setup NTP servers in the System Settings of a physical vStor the following command is displayed: Command failed: Failed to stop chronyd.service: Unit chronyd.service not loaded.
Resolution
1) Download the chrony rpm from the Centos mirror here:
http://mirror.centos.org/centos/7/os/x86_64/Packages/chrony-3.4-1.el7.x86_64.rpm
2) Upload it to the vStor and install as root using
rpm -i chrony-3.4-1.el7.x86_64.rpm
3) Enable the service with
systemctl start chronyd