For debug purposes, is is convenient to access the kvm monitor to gain information about the state of the instance:
# python qmp-shell /var/lib/libvirt/qemu/instance-00000043.monitor
Connected!
(QEMU) query-commands
[{u'name': u'qom-list-types'}, {u'name': u'change-vnc-password'}, ...
(QEMU) query-vnc
{u'family': u'ipv4', u'service': u'5900', u'clients': [],
u'enabled': True, u'auth': u'none', u'host': u'192.168.100.5'}
...
The libvirt daemon and the nova-compute daemon prevent access to the monitor and must be stopped.
Continue reading “Interactions with the kvm monitor in OpenStack”