Cannot start 2 VMs on F21

[Jerry James]

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,

-- 
Jerry James
http://www.jamezone.org/