[openstack-dev] [nova] [libvirt] The risk of hanging when shutdown instance.

Rui Chen chenrui.momo at gmail.com
Thu Mar 26 04:15:29 UTC 2015

Hi all:

    I found a discuss about the libvirt shutdown API maybe hang when
shutdown instance in libvirt community,

    I'm not sure that whether there are some risks when we shutdown
instance in nova.

    Three questions:
    1. Whether acpi is the default shutdown mode in QEMU/KVM hypervisor
when we shutdown instance using libvirt?
    2. Whether acpi is asynchronous mode, and qemu-agent is synchronous
mode when we shutdown instance?
    3. If the hypervisor use qemu-agent as default shutdown mode, how we
can deal the hanging issue?

Best Regards.
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