Add template information

[rpelissi]

Hi!
First thanks for this beautiful exporter :)
Could you try to add the fact that a vm is in fact a template in the pve_guest_info metric?
could be useful for filters and alerts.
Let me know if you have any question.
Thanks!

[znerol]

That might be possible. While the official docs on the /cluster/resources endpoint do not mention it, there seems to be a template key on returned qemu records.

Running pvesh against /cluster/resources of my cluster indicates that:

# pvesh get /cluster/resources --output-format json-pretty
...
[
...
  {
     ...
     "id" : "qemu/XXXX",
     "status" : "stopped",
     "template" : 1,
     "type" : "qemu",
     "uptime" : 0,
     "vmid" : XXXX
     ...
  },
...
]

Thus, the template label can likely be added from within the ClusterResourceCollector.

Pull requests welcome.