QEMU Monitor Protocol
QEMU Monitor Protocol (QMP) is a JSON-based protocol that allows applications to communicate with a QEMU instance. The qemu-monitor-command provided by the virsh shell allows users to interact with the QEMU monitor from the command line.
To enumerate all available QMP commands for a particular virtual machine, run the following:
#virsh qemu-monitor-command <vm_name> ––pretty '{"execute":"query-commands"}'
There are many query commands that can expose a lot of internal information that is not exposed to OpenStack and is vital for effective root cause analysis. For example, query-block returns detailed information about block devices being used by the virtual machine.
#virsh qemu-monitor-command instance-00000002 --pretty ...Get Mastering KVM Virtualization now with the O’Reilly learning platform.
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