Cpanel Supported Virtual Environments.
KVM
Linux-VServer
Microsoft Server® 2008 Hyper-V
OpenVZ (stable releases only)
Oracle VM VirtualBox, VirtualBox OSE
Virtuozzo™
VMware® Server, VMware® ESX Server
Xen, XenEnterprise™, XenExpress™, XenServer™
cPanel does not support VPS licenses for the FreeBSD operating system.
cPanel does not support 32-bit Virtual Environments that run on a 64-bit host kernel.
cPanel supports the drivers and configurations provided by Microsoft.
Rebuilding RRD Data Files
RRD files can be regenerated from the various summary files by using the /usr/local/cpanel/bin/rebuildbwrrd utility.
The utility can regenerate the data for a specific user or all users. This utility accepts the following parameters:
–all - Process all users on the system.
–dir={path} - Used to specify the location of the RRD summary files and where to create the new RRD files. If not specified, uses /var/cpanel/bandwidth.
–gid={#} - The number specified with this parameter is used to set the GID on any created files. If not specified, the program uses the GID of the existing data files.
prefix - The user or domain to process.
Cpanel Customer Contact feature
The Customer Contact feature replaces the Support Request system that exists in prior versions. Resellers may configure this feature to display contact details for support, billing and sales departments.
The feature retains the ability to allow contact submissions via email or external applications. A simplified branding editor in this interface allows the reseller to modify the cPanel™ interfaces used by this feature.
This feature is available to all resellers. Configuration and template data for each reseller is stored in the cpanelbranding directory in the reseller’s home directory.
For the root user this is /var/cpanel/cpanelbranding. Configuration data is stored in the contactinfo.yaml file while branding related changes are stored in one of the following:
contactinfo_include.html - Displays contact information in the Contact and Help cPanel™ interfaces
supportinfo_include.html - Displays a support request form in the Contact and Help cPanel™ interfaces.
Disk Space Usage and bandwidth data (RRD)
In cPanel™ 11.25 the number of bandwidth data (RRD) files has increased. File names have also changed for clarity. There are now two files for each protocol and for the aggregate.
As noted above, the number of RRD files generated by the system increased with cPanel™ 11.25. With this comes an increase in the disk space used by /var/cpanel/bandwidth.
To prevent issues related to disk consumption by the RRD files, during the cPanel™ Update /usr/local/cpanel/bin/chk_bwrrd_space is used to examine the disk mount that contains /var/cpanel/bandwidth.
If insufficient disk space is detected then bandwidth generation is disabled.
Cpanel Bandwidth Statistics Generation
The bandwidth statistics system in cPanel™ uses RRDTool [http://oss.oetiker.ch/rrdtool/] to track the data and generate
resulting graphs and meters. In cPanel™ 11.24 and prior versions, the way the RRDTool data was interpreted by the sys-tem could vary according to which subsystem was examining the data. This often resulted in inconsistent interpretations of the data, as well as missing data.
For cPanel™ 11.25, every aspect of the product that handled RRDTool data was overhauled and consolidated into a single subsystem. The end result is a consistent system that generates reliable and accurate statistics and data.
