Windows guest on KVM lost a network interface suddenly
Issue
A Windows guest with virtio-win unexpectedly lost a network interface.
There were no error messages in /var/log/messages or in /var/log/libvirt/qemu/
# /var/log/libvirt/libvirt.log
...(snip)...
<date/time>: 2674: warning : qemuMonitorJSONHandleDeviceDeleted:950 : missing device in device deleted event
...(snip)...
# /var/log/messages
...(snip)...
<date,time,host> kernel: device vnet11 left promiscuous mode
<date,time,host> kernel: bridge0: port 2(vnet11) entered disabled state
...(snip)...
We think that the above messages are the same as a pattern of removing VM's device using libvirt. But, our customer said that they executed nothing.
- Is this issue a bug about libvirt or qemu-kvm?
- What is a root cause of this issue?
- Are there any workarounds of this issue?
Environment
- Red Hat Enterprise Linux, Version 6 and 7
- KVM
- Windows as guest
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