Coming to create some new VM’s on one of our XenServer hosts recently, I ran into an interesting problem of the templates not being in sync between various servers. All servers started life as a XenServer 6.0 install, and both have followed the exact same upgrade path, however the resultant templates were differing.
A search around the Citrix forum lead to a solution of “roll back the server, and re-perform the upgrade”, possible, but a right pain in the ….
A much quicker solution, however, is to run the following script from the XenServer Console, this adds any missing templates and restores any settings needed.
/opt/xensource/libexec/create_templates