* First instance.update sent here https://github.com/openstack/nova/blob/57473088857014d7f46c17ffb3a476e09e0db30f/nova/conductor/manager.py#L976
* Second instance.update sent through this instance.save() https://github.com/openstack/nova/blob/57473088857014d7f46c17ffb3a476e09e0db30f/nova/compute/manager.py#L1785
* Third (the first with updated_at set) instance.update sent through resource_tracker instance_claim that will set the node and the host https://github.com/openstack/nova/blob/57473088857014d7f46c17ffb3a476e09e0db30f/nova/compute/manager.py#L1937
* First instance.update sent here https:/ /github. com/openstack/ nova/blob/ 57473088857014d 7f46c17ffb3a476 e09e0db30f/ nova/conductor/ manager. py#L976
* Second instance.update sent through this instance.save() https:/ /github. com/openstack/ nova/blob/ 57473088857014d 7f46c17ffb3a476 e09e0db30f/ nova/compute/ manager. py#L1785
* Third (the first with updated_at set) instance.update sent through resource_tracker instance_claim that will set the node and the host https:/ /github. com/openstack/ nova/blob/ 57473088857014d 7f46c17ffb3a476 e09e0db30f/ nova/compute/ manager. py#L1937