May 2018 - Users - libvirt List Archives

[libvirt-users] connecting host and guest vm using a dummy nic
by daggs 03 May '18

03 May '18

Greetings all, I have a host machine that runs a router within a vm. I want to allow a connection between the host and the guest so the host can connect to the lan provided by the router vm. I've created a dummy interface with these commands: $ ip link add ens99-dummy type dummy $ ip link set ens99-dummy address 52:54:00:1f:d0:ff this resulted with this output: $ ifconfig ens99-dummy ens99-dummy Link encap:Ethernet HWaddr 52:54:00:1F:D0:FF inet6 addr: fe80::84b5:24ff:fe62:c16d/64 Scope:Link UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:899 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:321727 (314.1 KiB) in my libvirt's xml file I have this entry: <interface type='direct'> <mac address='52:54:00:0c:cb:3e'/> <source dev='ens99-dummy' mode='private'/> <target dev='macvtap0'/> <model type='e1000'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x02' slot='0x01' function='0x0'/> </interface> after the vm is up, I see the adapter in the vm and the host has one more entry: $ ifconfig macvtap0 macvtap0 Link encap:Ethernet HWaddr 52:54:00:0C:CB:3E inet6 addr: fe80::5054:ff:fe0c:cb3e/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:889 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:0 (0.0 B) TX bytes:320523 (313.0 KiB) but when I try to request ip via dhcp from both macvtap0 and ens99-dummy I don't get any. any idea why?

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[libvirt-users] manually install a machine (no virt-install)
by Stallard, Adam 03 May '18

03 May '18

Hi, I'm wondering if there are any guides to connecting a qemu image to libvirt without using any virt-manager tools. I wish to send poweroff / on signals to the machine, and it seems all I need to do so is the libvirt library. I'm working on building an embedded platform where the images are generated in a cross-compiled environment. I'm hoping I can integrate them into libvirt's scope without the use of virt-manager tools like virt-install. As far as I can tell, I need to hand write /etc/libvirt/qemu/myimages.xml and /etc/libvirt/qemu/networks/myimagenetworks.xml. Is this feasible? If the machines are started up at boot time using qemu-system-x86_64, will these libvirt "profiles" provide a domain for libvirt visibility? I am trying to avoid adding virt-manager / python as a dependency to our host image as working with the dependency chain has been hellish so far. Adam

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[libvirt-users] Running ChromiumOS on libvirt
by Tony Arnold 03 May '18

03 May '18

Has anyone had any success running ChromiumOS as a VM under libvirt and can provide, or point me to, a set of instructions for getting it to work? I've tried and get as far as the white boot screen with the Chromium logo, but the VM just hangs there. Regards, Tony. -- Tony Arnold MBCS, CITP | Senior IT Security Analyst | Directorate of IT Services | Desk 51, Office 2, Kilburn Building | The University of Manchester | Manchester M13 9PL | T: +44 161 275 6093 | M: +44 773 330 0039

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[libvirt-users] Drive-backup functions.
by Matthew Schumacher 01 May '18

01 May '18

List, Two years ago there was discussion on implementing QEMU's block-dirty-bitmap backup solution: https://www.redhat.com/archives/libvir-list/2016-June/msg00380.html https://www.redhat.com/archives/libvir-list/2016-April/msg00401.html But I haven't seen anything since, and looking through git, it doesn't look like any of these patches were included. Can someone please bring me up to speed on what is up with these patches and what the current thinking is in regards to backing up with libvirt? Currently I'm snapshotting, then syncing the quiesced base image to one I have on alternate media, but it's slow and takes up a lot of space. Thanks, schu

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[libvirt-users] Server 2016 locked in paused state
by Paul O'Rorke 01 May '18

01 May '18

Hi all, I have a number of production Windows servers on KVM/DRBD and two of them are Server 2016. Both these guests have started exhibiting the same behaviour where they enter a paused state and will not resume. The behaviour is the same whether I use virsh or virt-manager. My only recourse is to force the guest off and start it again. This brings the host up temporarily where upon it pauses again. It could be minutes or hours but it always returns to being stuck in this paused state. I'm not seeing anything much in /var/log/kern.log or syslog - perhaps I'm missing the clue. Has anyone else seen this and or can you advise me where I should be looking to find the cause of this? Sincerely -- *Paul O'Rorke* *Tracker Software Products (Canada) Limited * www.tracker-software.com <http://www.tracker-software.com/> Tel: +1 (250) 324 1621 Fax: +1 (250) 324 1623 <http://www.tracker-software.com/> Support: http://www.tracker-software.com/support Download latest Releases http://www.tracker-software.com/downloads/

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