Hi, We discovered the use of qemu-guest-agent in openstack,Set hw_qemu_guest_agent=yes to the metadata parameter on the image. https://docs.openstack.org/mitaka/config-reference/compute/hypervisor-kvm.ht... Meanwhile, the application of qemu-guest-agent in cloud scenarios is investigated. It is found that Qemu-guest-Agent can be used for guest os performance monitoring, snapshot backup, and guest OS-level failover. But these things can be done in openstack with prometheus and cinder-backup,There may be some differences between them, Sorry, I am not familiar with how hw_qemu_guest_agent is used in openstack, and I do not know the operations that can be performed on guest os in openstack by configuring hw_qemu_guest_agent. Only through qemu official know some of the effects.I want to clarify the use of hw_qemu_guest_agent. Other components of openstack, such as the prometheus service, can be used instead.