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[libvirt-users] DriveReady error after live migration
by Steve Gaarder 27 Feb '15

27 Feb '15

I have three machines running libvirt under Scientific Linux (RHEL derivative) version 6. The virtual machine disk images are running SL 5 and 6, are all stored on NFS, and I can do live migrations with virsh migrate --live guestname qemu+ssh://vmhostname.math.cornell.edu/system Trouble is, within a day or two after the migration, the guest hangs up with repeated DriveReady errors and has to be shut down forcibly and rebooted. I am using Sanlock, with the lock files also stored on NFS. Any ideas? Steve Gaarder System Administrator, Dept of Mathematics Cornell University, Ithaca, NY, USA gaarder(a)math.cornell.edu

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[libvirt-users] KVM management through the web with libvirt and mist.io
by Markos Gogoulos 26 Feb '15

26 Feb '15

Hi, I would like to announce that we have integrated libvirt for managing KVM vms on mist.io. Mist.io is an open source project and a service that can assist you in managing your vms on a unified way, providing a simple interface for all of your infrastructure (multiple public cloud providers, OpenStack based public/private clouds, Docker servers, bare metal servers and now KVM hypervisors). Adding a KVM backend via libvirt will show a list of all of the virtual machines (running and terminated), along with the hypervisor itself. You can execute actions such as reboot, shutdown and start. Instead of having to log in to the hypervisor to reboot a VM that has hanged, you can do it with a few taps on your smartphone, laptop or tablet, along with the rest of your infrastructure. You can also have a web ssh shell if you add an ssh key. Creation of new VMs is not supported yet but is on our plans. You can have a look on a blog post we've written recently at http://blog.mist.io/post/110890044256/announcing-kvm-and-vcloud-support, use the open source tool (http://github.com/mistio/mist.io) or try out the service (https://mist.io) offering more features such as monitoring, adding custom metrics, scripts and logs. Hope you'll find it usefull Cheers, Markos

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[libvirt-users] Adding timestamps for all emulator output
by Andrey Korolyov 26 Feb '15

26 Feb '15

Hello, I think it would be useful if libvirt will be able to prefix all messages from emulator pipes with the date stamping, for example I am trying to catch very rare and non-fatal race with virtio-serial-bus: Guest failure in adding device virtio-serial0.0 which is specific to the Windows guests on qemu-kvm. I have supporting infrastructure which can tell me exact times for every action upon this VM, but as bug is not frequent, the continuous monitoring looks like an overkill for a desired goal - find a correlation between emulator event and message from stderr. Patching emulator itself is barely an option, as it is ugly, requires refresh of the running code via loopback migration and completely non-universal, as every hypervisor should be modified seperately. I`d highly appreciate positive consideration for such functionality addition or can write a patch shortly, if needed. Thanks!

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[libvirt-users] Questión about DNS config on dnsmasq
by Carlos Miranda Molina (Mstaaravin) 26 Feb '15

26 Feb '15

Hello guys... I'm using libvirt in my local laboratory and I have a question/problem about DNS settings over dnsmasq (by libvirt) I have a NAT network separately from my real network, i need simulated some DNS hosts to NAT network like ftp.debian.org (for testing purposes, etc) This is for example a dumpxml (yes, i'm using PXE boot for testing and is working fine) <network> <name>net0</name> <uuid>5a014735-f658-7a87-c7d4-e6b0f488c332</uuid> <forward mode='nat'/> <bridge name='net0' stp='on' delay='0'/> <mac address='52:54:00:b5:24:7b'/> <dns> <host ip='192.168.122.1'> <hostname>mirrors.kernel.org</hostname> <hostname>mirrors.dcarsat.com.ar</hostname> <hostname>ftp.debian.org</hostname> </host> </dns> <ip address='192.168.122.1' netmask='255.255.255.0'> <tftp root='/home/tftp'/> <dhcp> <range start='192.168.122.2' end='192.168.122.99'/> <bootp file='pxelinux.0'/> </dhcp> </ip> </network> Look <dns> & <hostname> section, that works correctly but only if I add hostnames on net0 when was offline. <dns> <host ip='192.168.122.1'> <hostname>mirrors.kernel.org</hostname> <hostname>mirrors.dcarsat.com.ar</hostname> <hostname>ftp.debian.org</hostname> </host> </dns> How i can add more hostnames with my network (net0) are still online...? virsh net-update default add-last dns-host (for example, doesn't work) and the official documentation @ http://libvirt.org/formatnetwork.html#elementsAddress doesn't say more. I test with <forwarder > but doesn't work (192.168.10.100 is a dnsmasq outside libvirt control) <network> <name>net0</name> <uuid>5a014735-f658-7a87-c7d4-e6b0f488c332</uuid> <forward mode='nat'/> <bridge name='net0' stp='on' delay='0'/> <mac address='52:54:00:b5:24:7b'/> <dns> <forwarder addr="192.168.10.100"/> </dns> <ip address='192.168.122.1' netmask='255.255.255.0'> <tftp root='/home/tftp'/> <dhcp> <range start='192.168.122.2' end='192.168.122.99'/> <bootp file='pxelinux.0'/> </dhcp> </ip> </network> Anyone can help me...? thanks -- "La Voluntad es el único motor de nuestros logros" http://blog.ngen.com.ar/

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[libvirt-users] A problem with converting an OVA appliance
by Marko Dimjašević 25 Feb '15

25 Feb '15

Hi all, I've been having a problem when trying to convert an Open Virtualization Appliance (OVA) format appliance to the "virt-image" format. This is how I try to convert the appliance: $ virt-convert --arch=i686 -i ovf appliance.ova The result is: ERROR Couldn't import file "appliance.ova": must be string without null bytes or None, not str This happens on a Debian Wheezy (7.8) machine. virt-convert is at version 0.600.1. All libvirt* packages are at version 1.2.9. Unfortunately, I couldn't find anyone else through web searches having the same issue and then applying their solution. It'd be great if someone can help with trying to figure out what is going on here... -- Regards, Marko http://dimjasevic.net/marko

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[libvirt-users] Fwd: Unattended guest installation fails
by ChandraShekar Shastri 25 Feb '15

25 Feb '15

Hi, I am following the below link to install a Fedora19 guest on Fedora19 Host. http://kashyapc.com/2011/08/18/unattended-guest-install-with-a-local-kickst… Version : libvirtd (libvirt) 1.0.5.1, QEMU emulator version 1.4.2, Copyright (c) 2003-2008 Fabrice Bellard I have the iso which I loop mounted and created a http repo using python module "python -m SimpleHTTPServer". This repo is properly accessible and the guest is able to pull the initrd.img and vmlinuz but further it fails. Please find the attached xml and console messages and let me know how to proceed further. Thanks, Chandrashekar

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[libvirt-users] libvirt unprivileged user and containers
by Vasiliy Tolstov 24 Feb '15

24 Feb '15

Hello. I need to create container on remote host that runs libvirt. Does it possible to download container image, extract it and run via libvirt? As i see in all cases libvirt need prepared dir with root file system, but in my case i'm not able to unpack archive on remote side because it need root privileges. How can i solve my problem? -- Vasiliy Tolstov, e-mail: v.tolstov(a)selfip.ru jabber: vase(a)selfip.ru

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[libvirt-users] live migration
by Thomas Stein 24 Feb '15

24 Feb '15

Hola. Just tried a live migration after fixing the pc-q35-2.1 error. Now i have new problem. It seems during live migration only the ram gets migrated. I use the following command. # virsh migrate --live domain qemu+ssh://newhost/system --copy-storage-all --verbose --persistent It works without problems. Apart from beeing way to fast. # virsh migrate --live domain qemu+ssh://newhost/system --copy-storage-all --verbose --persistent Migration: [100 %] On the destination i can enter the VM but thats it. There is no filesystem and so on. Did the migration syntax change? I use libvirt 1.2.12 and qemu 2.2.0. Thanks for any hints. best regards

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[libvirt-users] libvirt 1.2.12 + xen 4.4 wont migrate
by albie 24 Feb '15

24 Feb '15

Hi, We have been trying to get live migration working between two xen boxes running libvirt 1.2.12, However i seem to be getting the following error root@libvirt-xen1:~# virsh migrate --live trusty-image qemu+ssh://192.168.13.9/system --copy-storage-all --verbose --persistent --undefinesource root(a)192.168.13.9's password: error: unsupported flags (0x48) in function libxlDomainMigrateBegin3Params root@libvirt-xen1:~# virsh migrate --live trusty-image xen+ssh://192.168.13.9/system --copy-storage-all --verbose --persistent --undefinesource root(a)192.168.13.9's password: error: unsupported flags (0x48) in function libxlDomainMigrateBegin3Params Any ideas as to why this might be happening ? Regards, Albie Thomson

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[libvirt-users] HugePages - can't start guest that requires them
by G. Richard Bellamy 23 Feb '15

23 Feb '15

Hello All, I'm trying to enable hugepages, I've turned off THP (Transparent Huge Pages), and enabled hugepages in memoryBacking, and set my 2MB hugepages count via sysctl. I'm getting "libvirtd[5788]: Failed to autostart VM 'atlas': internal error: Unable to find any usable hugetlbfs mount for 16777216 KiB" where atlas is one of my guests and 16777216 KiB is the amount of memory I'm trying to give to the guest. Yes, i can see the hugepages via numastat -m and hugetlbfs is mounted via /dev/hugepages and there is a dir structure /dev/hugepages/libvirt/qemu (it's empty). HugePages is big enough to accommodate the 16G i'm allocating... and changing the perms on that directory structure to 777 doesn't work either. Any help is much appreciated. HOST: http://sprunge.us/SEdc GUEST: http://sprunge.us/VCYB Regards, Richard

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