tools-sgegrid-0918 is currently running via libvirt on cloudvirt1016. However, cloudvirt106 shows this in the log:
Feb 22 16:27:11 cloudvirt1016 nova-compute: 2021-02-22 16:27:11.831 67114 WARNING nova.compute.resource_tracker [req-bb5dffc4-6cba-455b-971e-8a0a216d4d6e - - - - -] Instance 1469938f-3dd9-4585-a538-8050cb57a44b has been moved to another host cloudvirt1036(cloudvirt1036.eqiad.wmnet). There are allocations remaining against the source host that might need to be removed: {'resources': {'VCPU': 4, 'MEMORY_MB': 8192, 'DISK_GB': 80}}.
This is incorrect! cloudvirt1036 thinks it is there and worries about its absence very briefly:
Feb 22 15:35:55 cloudvirt1036 nova-compute: 2021-02-22 15:35:55.364 18521 WARNING nova.compute.manager [req-7600eb69-23f1-4af6-ad19-c836f736c374 - - - - -] While synchro nizing instance power states, found 57 instances in the database and 56 instances on the hypervisor. Feb 22 15:35:55 cloudvirt1036 nova-compute: 2021-02-22 15:35:55.502 18521 WARNING nova.compute.manager [-] [instance: 1469938f-3dd9-4585-a538-8050cb57a44b] Instance is u nexpectedly not found. Ignore.
I have not found anything else like this so far (but it might be worth a quick audit). I used cumin to find the libvirt instance location.