Cannot start 2 VMs on F21

Tue Jan 27 16:05:29 UTC 2015

On 01/27/2015 11:03 AM, Jerry James wrote:
> I asked the question below on the virt mailing list about 2 weeks ago.
> There have been a grand total of zero responses so far.  I'll ask the
> same question here, in hopes that somebody knows something that could
> help.
> 
> On Wed, Jan 14, 2015 at 11:19 AM, Jerry James <loganjerry at gmail.com> wrote:
>> Greetings,
>>
>> I recently upgraded my work machine from F20 to F21, via fedup.  Now I
>> cannot run two VMs at the same time, as I used to be able to do, at
>> least with virt-manager.  If I try to start a second VM via
>> virt-manager, I get an error message:
>>
>> ------------------------------------------------------------------------------
>> Error starting domain: Unable to read from monitor: Connection reset by peer
>>
>> Details:
>> Error starting domain: Unable to read from monitor: Connection reset by peer
>>
>> Traceback (most recent call last):
>>   File "/usr/share/virt-manager/virtManager/asyncjob.py", line 89, in cb_wrapper
>>     callback(asyncjob, *args, **kwargs)
>>   File "/usr/share/virt-manager/virtManager/asyncjob.py", line 125, in tmpcb
>>     callback(*args, **kwargs)
>>   File "/usr/share/virt-manager/virtManager/domain.py", line 1388, in startup
>>     self._backend.create()
>>   File "/usr/lib64/python2.7/site-packages/libvirt.py", line 999, in create
>>     if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
>> libvirtError: Unable to read from monitor: Connection reset by peer
>>
>> Close
>> ------------------------------------------------------------------------------
>>
>> I can start any of my VMs, if there is no other VM running.  After
>> starting any VM, attempting to start any other VM as a second instance
>> triggers this failure.
>>
>> I will paste the contents of /var/log/messages from the latest
>> attempt.  In this case, qemu-Rawhide32 is the VM that was already
>> running, and had been running for some time, so I don't understand the
>> "New machine" message.  I'm trying to start the qemu-CentOS7 machine.
>>
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  (vnet1): carrier is OFF
>> Jan 14 11:02:36 diannao kernel: [94268.464579] device vnet1 entered
>> promiscuous mode
>> Jan 14 11:02:36 diannao kernel: [94268.467198] virbr0: port 3(vnet1)
>> entered listening state
>> Jan 14 11:02:36 diannao kernel: [94268.467211] virbr0: port 3(vnet1)
>> entered listening state
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  (vnet1): new Tun
>> device (driver: 'unknown' ifindex: 7)
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  (vnet1): exported
>> as /org/freedesktop/NetworkManager/Devices/6
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  (virbr0): bridge
>> port vnet1 was attached
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  (vnet1): enslaved to virbr0
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  (vnet1): device
>> state change: unmanaged -> unavailable (reason 'connection-assumed')
>> [10 20 41]
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  (vnet1): link connected
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  (vnet1): device
>> state change: unavailable -> disconnected (reason
>> 'connection-assumed') [20 30 41]
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  Activation
>> (vnet1) starting connection vnet1'
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  Activation
>> (vnet1) Stage 1 of 5 (Device Prepare) scheduled...
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  Activation
>> (vnet1) Stage 1 of 5 (Device Prepare) started...
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  (vnet1): device
>> state change: disconnected -> prepare (reason 'none') [30 40 0]
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  Activation
>> (vnet1) Stage 2 of 5 (Device Configure) scheduled...
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  Activation
>> (vnet1) Stage 1 of 5 (Device Prepare) complete.
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  Activation
>> (vnet1) Stage 2 of 5 (Device Configure) starting...
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  (vnet1): device
>> state change: prepare -> config (reason 'none') [40 50 0]
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  Activation
>> (vnet1) Stage 2 of 5 (Device Configure) successful.
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  Activation
>> (vnet1) Stage 2 of 5 (Device Configure) complete.
>> Jan 14 11:02:36 diannao dbus[838]: [system] Activating via systemd:
>> service name='org.freedesktop.machine1'
>> unit='dbus-org.freedesktop.machine1.service'
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  Activation
>> (vnet1) Stage 3 of 5 (IP Configure Start) scheduled.
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  Activation
>> (vnet1) Stage 3 of 5 (IP Configure Start) started...
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  (vnet1): device
>> state change: config -> ip-config (reason 'none') [50 70 0]
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  Activation
>> (vnet1) Stage 3 of 5 (IP Configure Start) complete.
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  (vnet1): device
>> state change: ip-config -> secondaries (reason 'none') [70 90 0]
>> Jan 14 11:02:36 diannao NetworkManager[946]: <info>  (vnet1): device
>> state change: secondaries -> activated (reason 'none') [90 100 0]
>> Jan 14 11:02:36 diannao dbus[838]: [system] Successfully activated
>> service 'org.freedesktop.machine1'
>> Jan 14 11:02:36 diannao kernel: device vnet1 entered promiscuous mode
>> Jan 14 11:02:36 diannao kernel: virbr0: port 3(vnet1) entered listening state
>> Jan 14 11:02:36 diannao kernel: virbr0: port 3(vnet1) entered listening state
>> Jan 14 11:02:37 diannao systemd-machined: New machine qemu-Rawhide32.
>> Jan 14 11:02:37 diannao systemd-machined: New machine qemu-CentOS7.
>> Jan 14 11:02:37 diannao NetworkManager[946]: <info>  Activation
>> (vnet1) successful, device activated.
>> Jan 14 11:02:37 diannao dbus[838]: [system] Activating via systemd:
>> service name='org.freedesktop.nm_dispatcher'
>> unit='dbus-org.freedesktop.nm-dispatcher.service'
>> Jan 14 11:02:37 diannao dbus[838]: [system] Successfully activated
>> service 'org.freedesktop.nm_dispatcher'
>> Jan 14 11:02:37 diannao nm-dispatcher: Dispatching action 'up' for vnet1
>> Jan 14 11:02:37 diannao systemd: Unit iscsi.service cannot be reloaded
>> because it is inactive.
>> Jan 14 11:02:37 diannao systemd: Unit named.service cannot be reloaded
>> because it is inactive.
>> Jan 14 11:02:37 diannao kernel: [94269.394707] qemu-system-x86:
>> sending ioctl 5326 to a partition!
>> Jan 14 11:02:37 diannao kernel: qemu-system-x86: sending ioctl 5326 to
>> a partition!
>> Jan 14 11:02:37 diannao kernel: qemu-system-x86: sending ioctl
>> 80200204 to a partition!
>> Jan 14 11:02:37 diannao kernel: [94269.394737] qemu-system-x86:
>> sending ioctl 80200204 to a partition!
>> Jan 14 11:02:37 diannao kernel: [94269.448193] virbr0: port 3(vnet1)
>> entered disabled state
>> Jan 14 11:02:37 diannao kernel: virbr0: port 3(vnet1) entered disabled state
>> Jan 14 11:02:37 diannao kernel: device vnet1 left promiscuous mode
>> Jan 14 11:02:37 diannao kernel: [94269.448871] device vnet1 left
>> promiscuous mode
>> Jan 14 11:02:37 diannao kernel: [94269.448894] virbr0: port 3(vnet1)
>> entered disabled state
>> Jan 14 11:02:37 diannao kernel: virbr0: port 3(vnet1) entered disabled state
>> Jan 14 11:02:37 diannao NetworkManager[946]: <info>  (vnet1): device
>> state change: activated -> unmanaged (reason 'removed') [100 10 36]
>> Jan 14 11:02:37 diannao NetworkManager[946]: <info>  (vnet1):
>> deactivating device (reason 'removed') [36]
>> Jan 14 11:02:37 diannao journal: Unable to read from monitor:
>> Connection reset by peer
>> Jan 14 11:02:37 diannao NetworkManager[946]: <warn>  (virbr0): failed
>> to detach bridge port vnet1
>> Jan 14 11:02:37 diannao NetworkManager[946]: nm_device_get_iface:
>> assertion 'self != NULL' failed
>> Jan 14 11:02:37 diannao NetworkManager[946]: <info>  (vnet1): released
>> from master (null)
>> Jan 14 11:02:37 diannao systemd-machined: Machine qemu-CentOS7 terminated.
>> Jan 14 11:02:37 diannao journal: error from service: TerminateMachine:
>> No machine 'qemu-CentOS7' known
>> Jan 14 11:02:38 diannao nm-dispatcher: Dispatching action 'down' for vnet1
>> Jan 14 11:02:38 diannao gnome-session: Gjs-Message: JS LOG: Removing a
>> network device that was not added
>> Jan 14 11:02:38 diannao systemd: Unit named.service cannot be reloaded
>> because it is inactive.
>>
>>
>> It looks like there is some kind of trouble setting up the network for
>> the second VM.  Does anybody have any suggestions for things I could
>> try to resolve this?  Are there known issues with upgrading from F20
>> to F21?  Thank you,
> 

Please file a bug against libvirt, and include:

1) sudo virsh dumpxml $vmname
2) /var/log/libvirt/qemu/$vmname.log

for the failing VM

- Cole