December 2012 - Users - libvirt List Archives

[libvirt-users] some problem with snapshot by libvirt
by xingxing gao 21 Nov '14

21 Nov '14

Hi,all,i am using libvirt to manage my vm,in these days i am testing the libvirt snapshot ,but meet some problem: the snapshot was created from this command: snapshot-create-as win7 --disk-only --diskspec vda,snapshot=external --diskspec hda,snapshot=no but when i tried to revert from the snapshot which created from the above command ,i got error below: virsh # snapshot-revert win7 1338041515 --force error: unsupported configuration: revert to external disk snapshot not supported yet version: virsh # version Compiled against library: libvir 0.9.4 Using library: libvir 0.9.4 Using API: QEMU 0.9.4 Running hypervisor: QEMU 1.0.93

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[libvirt-users] virt-viewer via ssh to a remote host
by Marc Haber 03 Jan '13

03 Jan '13

Hi, I have a virtualization host running KVM and libvirt 0.9.12 (on Debian unstable). I would like to connect with virt-viewer 0.5.4 from a different host to a domain that has Display Spice configured as graphics interface. I can connect to the KVM host using virsh --connect=qemu+ssh://mh@fan.local/system and start m KVM domain from there, so I guess that authentication is just fine. However, virt-viewer --connect=qemu+ssh://mh@fan.local/system <domain> does not work. The easy issue was that virt viewer issues a "nc fan.local 5900" on the remote host, while the Display Spice agent listens on 127.0.0.1 only. I could fix that by checking the "listen on all IP addresses" box in the Display Spice configuration in virt-manager. After that, I could see the TCP connection to the Spice agent on the remote host succeed when tcpdumping on the KVM host's lo interface. When I invoke virt-viewer when the domain is not running, it says "Waiting for the guest domain to start", and changes to "Connecting to graphic server" when I start the domain. When I invoke virt-viewer when the domain is already running, it immediately says "Connecting to graphic server", but the domain's console does never show up. When I invoke virt-viewer --connect=qemu:///system <domain> directly on the KVM host, the console shows up alright. On the KVM host, virt-viewer --connect=qemu+ssh:///system <domain> gives the same behavior as the remote invocation, while virt-viewer --direct --connect=qemu+ssh:///system <domain> does. So I guess there is something wrong with the tunneling of the Spice session through ssh. Am I doing something wrong? I would appreciate any hints. Greetings Marc -- ----------------------------------------------------------------------------- Marc Haber | "I don't trust Computers. They | Mailadresse im Header Mannheim, Germany | lose things." Winona Ryder | Fon: *49 621 31958061 Nordisch by Nature | How to make an American Quilt | Fax: *49 621 31958062

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[libvirt-users] Is thre any way to change the vm computer name which joined AD
by Timon Wang 29 Dec '12

29 Dec '12

I want to change the computer name of the vm which based on a qcow2 img. virt-win-reg can merge some value when the vm is not joined the AD, but when it joined I tried to do it by virt-win-reg and failed. Any one have any idea about it? -- Focus on: Server Vitualization, Network security,Scanner,NodeJS,JAVA,WWW Blog: http://www.nohouse.net

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[libvirt-users] Error installing VM: "Process exited while reading console log output"
by Patrick 'P. J.' McDermott 29 Dec '12

29 Dec '12

Hi, I'm trying to install a qemu-kvm virtual machine on a Debian GNU/Linux squeeze amd64 host, using virtinst 0.500.3 and libvirt 0.8.3. First I tried this command as a normal user (in groups kvm and libvirt): $ virt-install --connect qemu:///system --name test1 \ > --ram $((128 * 1024 * 1024)) --vcpus=1 --description 'Test VM 1' \ > --location=http://http.us.debian.org/debian/dists/squeeze/main/installer-amd64/ \ > --extra-args='auto url=http://10.0.0.128/baldr1.cfg' \ > --os-type=linux --os-variant=debiansqueeze \ > --disk path=/mnt/data/vms/test1.img --network bridge=br0 \ > --nographics --hvm --virt-type=kvm --serial pty --autostart This failed, giving me the following output: Starting install... Retrieving file MANIFEST... | 3.3 kB 00:00 ... Retrieving file linux... | 4.6 MB 00:13 ... Retrieving file initrd.gz... | 13 MB 00:38 ... ERROR internal error Process exited while reading console log output: char device redirected to /dev/pts/4 Domain installation does not appear to have been successful. If it was, you can restart your domain by running 'virsh start test1'; otherwise, please restart your installation. ERROR internal error Process exited while reading console log output: char device redirected to /dev/pts/4 Traceback (most recent call last): File "/usr/bin/virt-install", line 1033, in <module> main() File "/usr/bin/virt-install", line 915, in main start_time, guest.start_install) File "/usr/bin/virt-install", line 957, in do_install dom = install_func(conscb, progresscb, wait=(not wait)) File "/usr/lib/pymodules/python2.6/virtinst/Guest.py", line 973, in start_install return self._do_install(consolecb, meter, removeOld, wait) File "/usr/lib/pymodules/python2.6/virtinst/Guest.py", line 1038, in _do_install "install") File "/usr/lib/pymodules/python2.6/virtinst/Guest.py", line 1009, in _create_guest dom = self.conn.createLinux(start_xml, 0) File "/usr/lib/python2.6/dist-packages/libvirt.py", line 1277, in createLinux if ret is None:raise libvirtError('virDomainCreateLinux() failed', conn=self) libvirtError: internal error Process exited while reading console log output: char device redirected to /dev/pts/4 I tried the same virt-install command without "--serial pty" and as root, to no avail. I then tried setting "console" using --extra-args, i.e.: $ virt-install --connect qemu:///system --name test1 \ > --ram $((128 * 1024 * 1024)) --vcpus=1 --description 'Test VM 1' \ > --location=http://http.us.debian.org/debian/dists/squeeze/main/installer-amd64/ \ > --extra-args='console=tty0 console=ttyS0,115200n8' \ > --os-type=linux --os-variant=debiansqueeze \ > --disk path=/mnt/data/vms/test1.img --network bridge=br0 \ > --nographics --hvm --virt-type=kvm --serial pty --autostart Again, I get the same error. Can anyone tell me why I'm getting this error or give me some hints to troubleshoot this? So far nothing in the Python or C code of libvirt stands out at me, and nothing in ~/.virtinst/virt-install.log looks helpful. Since there's no specific error message to say why the process exited, does this perhaps mean that debian-installer is simply shutting down immediately after booting? (I'm sending this to the libvirt-users list because it looks like a libvirt issue. Let me know if I should query a different list.) Thanks, -- Patrick "P. J." McDermott http://www.pehjota.net/ http://www.pehjota.net/contact.html

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[libvirt-users] Local and domain SIDs -- WAS: Is there any way to change the vm computer name which joined AD
by Bryan J Smith 24 Dec '12

24 Dec '12

On Mon, Dec 24, 2012 at 4:01 AM, Timon Wang <timonwst(a)gmail.com> wrote: > If a vm join AD domain, the name is registered in the AD server, when I copy > a VM, the name will conflict with the source VM. > I wanna to know if I can change the VM computer name automaticly. This is not a hostname issue. This is a pure AD/NT-SID issue** (Security Identifiers). It affects all virtualization solutions, even Hyper-V. Two (2) systems must have unique SID enumeration.** When you have standalone systems that are not part of a domain, as long as the two systems never see each other, it's typically not an issue. But when they are part of a domain, it is an issue, because there must be an unique SID enumeration for any domain member. You should never clone/create/instance/etc... a system once it's been joined to a domain, unless you use a solution that undoes its SID enumeration. Microsoft introduce sysprep years ago so when a system reboots, new local SIDs** are enumerated. This is recommended for all systems when cloned, whether they join an AD domain later or not. Some virtualization solutions don't bother to sysprep the system before joining them to a domain. This is because the SID enumeration in a domain is domain-wide, and the local SIDs are usually not utilized. This drastically reduces issues although there can still be issues between two nodes that have the same local SID enumeration.** There is no way around this issue, as it's a core NT issue. The recommended solutions are to either ... - Always run SysPrep before making a template, regardless whether an AD member or not - Join the domain as part of a local group policy before the system comes up (e.g., still has duplicate local SIDs) In oVirt/RHEV, you can join the domain as part of the SysPrep scripts. The easiest way to do this is to create an user in your AD domain that only has the delegation and no other role. The system is joined to the AD domain upon first boot of the VM instance using that user. -- bjs, MCITP/MCSE/MCSA **NT INTERNALS NOTE: The local System Accounts Manager (SAM) and other portions of the local NT systems' Registry, as well as the local NTFS file systems attributes, are where local SID are stored and utilized. The first NT system promoted to a Domain Controller (DC) has its SAM and SID enumeration because the initial, network-wide SIDs for the domain (that's an over-simplification, but similar), and it no longer has its local enumeration (all DCs are like this, there is still a local SAM/SID enumeration, but it is not referenced, which is a long and complicated story with some issues). When a local system joins a domain, and becomes a domain member, it starts using those SID references. The local SAM/SID still exist and are known (unlike a DC, which stops using them altogether), but are typically not utilized. So SIDs are usually no longer an issue, unless you have member workstations/servers directly accessing and managing other member workstations/servers (e.g., IPC like to C$ or similar). It is very, very important that anyone managing Windows systems understand these internals, especially when it comes to domains. Sadly a lot of MCSEs (especially older ones) don't seem to, among other NT and AD internals. Microsoft still doesn't offer a good AD internals course, although they do have a good NT internals course as well as set of books. -- Bryan J Smith - Professional, Technical Annoyance b.j.smith at ieee.org - http://www.linkedin.com/in/bjsmith ---------------------------------------------------------- Computers are precise, but not accurate, and make mistakes due to lack of input, as lack of awareness and observation

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[libvirt-users] Difficulty with a transferred VM
by Dale Amon 21 Dec '12

21 Dec '12

I have a better faster server and moved the disk from the old one to the new one. After the move, I edited the xml file manually to give it the correct paths for the new machine, since the mount point for all the VM storage pools is now different. I get # virsh start www.foo.org error: Failed to start domain www.foo.org error: internal error cannot load AppArmor profile 'libvirt-xxx .... xxx' I tried aa-complain /usr/sbin/libvirtd I even tried editing /etc/apparmor/usr.lib.libvirt.virt-aa-helper and adding the new path to where the VM images are stored. Still no joy. Suggestions?

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[libvirt-users] CFS BWC related question
by Dennis Chen 19 Dec '12

19 Dec '12

Hi, Seems this question is not related with libvirt directly, but I still want to ping this list to see if someone can be help. The OS in my desktop box is Ubuntu 12.10, the kernel is 3.5.1. I installed the cgroup utility package with:#apt-get install cgroup-bin, but after I installed these packages successfully, I can't find cpu_quota/cpu_period controller in the /sys/fs/cgroup/cpu folder. So the essential question is: What I need to do to make cgroup can support CFS BWC feature? Specifically, how to make the cpu_quota/cpu_period to be available within cgroup/cpu? BRs, Dennis

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[libvirt-users] Need help regarding perl sys::virt
by Rawat, Vishwanath 19 Dec '12

19 Dec '12

Hi, I wanted to use perl Sys::Virt (which uses libvirt) to remotely connect KVM hypervisor. As a start I tried following simple script(KVM.pl) but I am getting following error. First it will ask for authentication which I am providing to it manually then it fails. Do I need to do some configuration on KVM hypervisor before executing this script? Any help is appreciated. bash-3.2$ perl KVM.pl root(a)10.238.132.125's password: Unable to open connection to qemu+ssh://root@10.238.132.125/system?no_verify=1: End of file while reading data: Warning: Perm: Input/output error8.132.125' (RSA) to the list of known hosts. Can't call method "list_domains" on an undefined value at KVM.pl line 21. bash-3.2$ bash-3.2$ cat KVM.pl use strict; use warnings; use Sys::Virt; use Data::Dump qw(dump); my $user = "root"; my $host = <some_host>; my $uri = "qemu+ssh://root\@$host/system?no_verify=1"; my $vmm; eval { $vmm = Sys::Virt->new(uri => $uri, readonly => 1); }; if ($@) { print "Unable to open connection to $uri: " . $@->message . "\n"; } for my $dom ($vmm->list_domains, $vmm->list_defined_domains) { ## see perldoc Sys::Virt::Domain print "name: ", $dom->get_name, "\n"; print "uuid: ", $dom->get_uuid_string(), "\n"; ## $dom->get_info returns a hash reference dump $dom->get_info; print "\n"; } Regards, Rawat

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[libvirt-users] Ordering multiple network interfaces on vms
by john fisher 18 Dec '12

18 Dec '12

On a hypervisor with multiple interfaces, we'd like to make those interfaces available to each of multiple VMs. We have both bridged interfaces and SRIOV interfaces, no NAT interfaces. When we create a vm in virsh using an xml file with no network elements, but having interface elements, we get the interfaces in the vm, but the ordering of eth devices does not match the ordering on the hypervisor and we aren't sure the ordering is repeatable either. In other words, eth0 in the HV is thingA and eth1 is thingB, but on the VM eth0 is thingC eth1 is thingD and eth4 is thingA so forth. we have 12 interfaces so ordering or naming is important and confusing. We've tried to use the PCI bus numbers as seen in lspci on the HV, but no luck. Do we need to start using network elements in the vm's xml file or separately to control the ordering? Whats the usual practice here? Sample xml: <interface type='hostdev'> <source dev='eth3' mode='vepa'> <address type='pci' domain='0x0000' bus='0x16' slot='0x10' function='0x1'/> </source> <target dev='macvtap0'/> </interface> <interface type='bridge'> <source bridge='br4'/> <target dev='vnet0'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> Thanks! -- John Fisher

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[libvirt-users] ANNOUNCE: New libosinfo project mailing list
by Daniel P. Berrange 17 Dec '12

17 Dec '12

Historically the libosinfo project has used virt-tools-list(a)redhat.com for all its discussions. Since the project has grown and matured, it is time for a dedicated mailing list. If you are interested/involved with libosinfo, please subscribe to the new list: https://www.redhat.com/mailman/listinfo/libosinfo The list only accepts postings from members. Once subscribed you can post to libosinfo(a)redhat.com Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|

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[libvirt-users] Virtualbox Driver
by Arslan Waqar 17 Dec '12

17 Dec '12

Hi all, I am new to the group and hence there might be a chance I might be asking a simple question... The thing is I compiled and installed libvirt from git. Then in my terminal window I started virsh. It started. Then since I had Virtual Box installed on my machine I ran "connect vbox:///session". Once I did this I got two errors which said: error: Failed to connect to the hypervisor error: internal error unable to initialize VirtualBox driver API I am unable to resolve this issue...Any input is welcome! Thanks! -- Regards, Arslan Waqar.

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[libvirt-users] alternate location of client pki artifacts
by Alon Bar-Lev 16 Dec '12

16 Dec '12

Hello, At libvirtd.conf there are configurations to override the defaults of the ca, cert, key of libvirt. Can the client configuration be also overridden? Thanks! Alon

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[libvirt-users] Newer Builds Available for Ubuntu 12.04 LTS?
by Andrew Martin 14 Dec '12

14 Dec '12

Hello, I am running Libvirt 0.9.8 and QEMU 1.0 on Ubuntu 12.04 LTS on several virtual machine servers and would like to take advantage of some of the snapshotting functionality available in newer versions of QEMU and Libvirt: https://www.redhat.com/archives/libvirt-users/2012-August/msg00086.html Is anyone maintaining newer binary builds for Ubuntu? I was not able to find a PPA with updated packages, and building from source is proving rather tricky because my custom-built packages have some differences from the official packages (e.g. no upstart integration). I would really like to use the newer versions of Libvirt and QEMU on this LTS release. Thanks, Andrew

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Re: [libvirt-users] NetworkManager and VM Bridged Networking
by Eric Blake 14 Dec '12

14 Dec '12

[adding libvirt-users] On 12/14/2012 01:26 AM, Chuck Forsberg WA7KGX N2469R wrote: > I tried using the procedure in > http://fedorasolved.org/Members/kc8hfi/qemu-kvm-bridged-networking. > > The first thing this article mentions is that NetworkManager cannot work > with bridged networking. This is \unfortunate\ as Lunix stopped being a > useful server when I tried ro revert to the old "network" as suggested > by the article. > > I have no trouble running the VM on a satellite machine and have its > guest operating system (SCO Unix) mount the server's NFS shares. > I would like to have an SCO image running in a VM on the server and > still be able to mount NFS shares from the server. > > Since NetworkManager is more and more an indespensible part of Fedora, > how can I do the needed bridged networking in the new environment? Does this page of examples help? http://libvirt.org/formatnetwork.html#examples If not, what setup are you trying to achieve? It may be that the libvirt folks can better answer your question on how to set it up, while still using NetworkManager. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org

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[libvirt-users] RHEL6 cgroup error after a few days of uptime
by Dax Kelson 13 Dec '12

13 Dec '12

I have a RHEL6 that hosts many kvm virtual machines. It has been working fine for a couple years. I apply errata updates about once a week. In the last couple weeks, I've ran into a bug where the virtual machines start failing to start with a cgroup error message. If I reboot the host (very disruptive) then things start working normaly for a few days. Can I configure qemu/libvirt not to use cgroups at all as a temporary workaround? How would I do that? Here is example of trying to start a vm (that hasn't been started since boot) after the problem manifests itself. [root@virthost ~]# find /cgroup | grep r04s14 [root@virthost ~]# virsh start r04s14 error: Failed to start domain r04s14 error: Unable to create cgroup for r04s14: No such file or directory [root@virthost ~]# find /cgroup | grep r04s14 /cgroup/cpu/libvirt/qemu/r04s14 /cgroup/cpu/libvirt/qemu/r04s14/cpu.rt_period_us /cgroup/cpu/libvirt/qemu/r04s14/cpu.rt_runtime_us /cgroup/cpu/libvirt/qemu/r04s14/cpu.stat /cgroup/cpu/libvirt/qemu/r04s14/cpu.cfs_period_us /cgroup/cpu/libvirt/qemu/r04s14/cpu.cfs_quota_us /cgroup/cpu/libvirt/qemu/r04s14/cpu.shares /cgroup/cpu/libvirt/qemu/r04s14/cgroup.event_control /cgroup/cpu/libvirt/qemu/r04s14/notify_on_release /cgroup/cpu/libvirt/qemu/r04s14/cgroup.procs /cgroup/cpu/libvirt/qemu/r04s14/tasks /cgroup/cpuacct/libvirt/qemu/r04s14 /cgroup/cpuacct/libvirt/qemu/r04s14/cpuacct.stat /cgroup/cpuacct/libvirt/qemu/r04s14/cpuacct.usage_percpu /cgroup/cpuacct/libvirt/qemu/r04s14/cpuacct.usage /cgroup/cpuacct/libvirt/qemu/r04s14/cgroup.event_control /cgroup/cpuacct/libvirt/qemu/r04s14/notify_on_release /cgroup/cpuacct/libvirt/qemu/r04s14/cgroup.procs /cgroup/cpuacct/libvirt/qemu/r04s14/tasks [root@virthost ~]#

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[libvirt-users] oVirt workshop coming up - January 22-24 2013
by Dave Neary 13 Dec '12

13 Dec '12

Hi everyone, I thought that some of you might be interested to hear about an upcoming event I'm helping put together, an oVirt workshop in NetApp HQ in Sunnyvale, California on January 22-24. oVirt is (as I'm sure most of you know) a management system for KVM-based virtualization - allowing you to easily handle VMs, network, storage and hosts in a virtual datacenter. The workshop's three day agenda will cover installation and use of oVirt, integrating with oVirt though the platform's APIs, and contributing to development of the project. This is an excellent opportunity to find out what's coming in future versions of RHEV, and to meet users who are on the bleeding edge of what we will be shipping in future products. Reserve your spot at this free event by registering at http://ovirtnetapp2013.eventbrite.com/, and see http://www.ovirt.org/NetApp_Workshop_January_2013 for more information. We are actively seeking presenters who can talk about interesting ways in which they are using oVirt, or share integration stories. Please send proposals for talks to workshop-pc(a)ovirt.org - the official end of the call for content is Friday 14th of December, 23:59 PST, but since we will not be drafting the schedule until next week, any proposals received by Monday will also be considered. Thanks! Dave. -- Dave Neary - Community Action and Impact Open Source and Standards, Red Hat - http://community.redhat.com Ph: +33 9 50 71 55 62 / Cell: +33 6 77 01 92 13

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[libvirt-users] CentOS 6.3 LXC guest with CentOS 6.3 host
by Ajey Gore 13 Dec '12

13 Dec '12

I have been struggling with LXC libvirt driver. I created LXC container fs from "yum install" with install root option. After that edited few files and created special nodes rm -f /dev/null mknod -m 666 /dev/null c 1 3 mknod -m 666 /dev/zero c 1 5 mknod -m 666 /dev/urandom c 1 9 ln -s /dev/urandom /dev/random mknod -m 600 /dev/console c 5 1 mknod -m 660 /dev/tty1 c 4 1 chown root:tty /dev/tty1 mkdir -p /dev/shm chmod 1777 /dev/shm mkdir -p /dev/pts chmod 755 /dev/pts basically all instructions from here http://wiki.1tux.org/wiki/Centos6/Installation/Minimal_installation_using_y… My configuration looks like this <domain type='lxc'> <name>c03</name> <memory unit="G">4</memory> <os> <type>exe</type> <init>/sbin/init</init> </os> <vcpu>1</vcpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/srv/libvirt-1.0.0/src/libvirt_lxc</emulator> <filesystem type='mount'> <source dir='/srv/guest/c03'/> <target dir='/'/> </filesystem> <interface type='network'> <mac address='52:54:00:00:00:01'/> <source network='default'/> <target dev='vnic-c03'/> <model type='virtio'/> </interface> <console type='pty' /> </devices> </domain> I compiled libvirt from source. MY container comes up fine but I get init: tty (/dev/tty1) main process ended, respawning init: tty (console) respawning too fast, stopped also, I can't login as root, because it say /dev/pts/0 is not safe, but if I add a normal user with chroot and then I login, it works perfectly. So in this case, after init stops everything, I can't get rc.local to execute and in turn can't get ip address and other configurations up and running. help? -- Thanks Ajey

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[libvirt-users] Networking problem on virtualized pfSense firewall
by Lorenzo Milesi 13 Dec '12

13 Dec '12

Hi. I've a strange problem with networking and a KVM virtualized pfsense firewall. My hw host is Ubuntu 12.04 fully updated, with two bridges br0 (LAN) and br1 (WAN). pfSense is a KVM guest with the two interfaces in virtio mode. When I run pfSense as fw, the host doesn't seem capable of doing tcp connections outside. I can ping any internal and exernal host, but when I try telnetting 25 or 80 outside it won't work. Every other host in the LAN can surf and make every kind of connection outside and inside, just the host cannot. At fist I thought it was a pfSense problem, because if I run another VM guest with another firewall the host can connect, but what makes me think it's a host networking issue is that with this other FW I experience other weird problems, like not being able to connect to the physical host when connected via VPN. I double checked iptables and there's no block, everything is accepted. KVM setup is pretty much the ubuntu default. Any idea? thanks -- Lorenzo Milesi - lorenzo.milesi(a)yetopen.it GPG/PGP Key-Id: 0xE704E230 - http://keyserver.linux.it

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[libvirt-users] Support for on-demand USB pass through
by Felicitus 12 Dec '12

12 Dec '12

Hi, I'm trying to use USB pass through with devices that are not present at the VM startup. However, when starting the machine, libvirt complains that the USB device doesn't exist. I was following the guide at [1], but this doesn't seem to work on Debian Wheezy. Any hints how to achieve that? Thanks, Felicitus [1] http://david.wragg.org/blog/2009/03/usb-pass-through-with-libvirt-and-kvm.h…

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[libvirt-users] error creating multipath storage pool
by Maxim Titov 11 Dec '12

11 Dec '12

Hi I'm using Gentoo Linux, libvirt-1.0.0, qemu-1.1.2-r3, multipath-tools 0.4.8-r1. After defining a new storage pool with pool-edit <poolname>: <pool type="mpath"> <name>mpath</name> <target> <path>/dev/mapper</path> </target> </pool> I get this: internal error missing backend for pool type 7 USE flags for libvirt package are: caps elibc_glibc iscsi libvirtd lvm lxc macvtap nfs nls python qemu udev vepa -audit -avahi -debug -firewalld -numa -openvz -parted -pcap -phyp -policykit -rbd -sasl -selinux -uml -virt-network -virtualbox -xen) What is wrong and what is the right way to map SAN LUN's to guest using multipath?

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[libvirt-users] online course for libvirt
by Arindam Choudhury 10 Dec '12

10 Dec '12

Hi, It will be very helpful for novice user like me if libvirt developers consider organizing an online course for libvirt using platform like coursera or edx. Thanks

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[libvirt-users] Configuration file question
by David Mitchell 10 Dec '12

10 Dec '12

Where are the configuration files for libvirt and/or virsh actually stored? It seems that most of them are in /etc/libvirt but identical copies are also found in /var/lib/libvirt. In my case I am having issues with the network/default.xml file being different. Is there a reason why the config seems to be in two places at once? And which one is the 'correct' one? -David Mitchell ----------------------------------------------------------------- | David Mitchell (mitchell(a)ucar.edu) Network Engineer IV | | Tel: (303) 497-1845 National Center for | | FAX: (303) 497-1818 Atmospheric Research | -----------------------------------------------------------------

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Re: [libvirt-users] Libvirt problem with KVM from source
by Ekrem Sonmemis 10 Dec '12

10 Dec '12

Hi, Does your custom KVM binary (source compiled ?) run properly ? Have you test it ? Yes indeed, it compiles fine and works exactly as I wish. The only problem occurs after I try to add libvirt to the custom KVM. Regards, Ekrem

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[libvirt-users] Libvirt problem with KVM from source
by Ekrem Sonmemis 10 Dec '12

10 Dec '12

Dear List, I have installed a custom KVM on my Ubuntu 12.04 which I sometimes use. I would like to use it with libvirt, so I used apt-get to install libvirt, virt-viewer and virtinst. I can start virsh after installation and it says it is version 0.9.8, but once I get to trying to install a VM with virtinst, I get the error message: ERROR Host does not support any virtualisation options If I install KVM using apt-get the exact same instruction works, so perhaps the problems occurs with the custom KVM due to the configuration of the KVM install but I'm afraid I can't figure it out. I would really like to make it work with the custom KVM rather than the packaged version. I install the custom KVM at the prefix /usr/local/kvm, but I don't change anything else. Could this have anything to do with it? Thanks for reading. Regards, Ekrem

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[libvirt-users] Managing eths in vm from HV
by john fisher 08 Dec '12

08 Dec '12

KVM Ubuntu 12.04 libvirt 1.0 Related to my post of a day ago, but I can't reply to it... I want to control the order ( and therefore the connection) of eth devices in the vm. If I know what the MAC addresses are on my HV, as seen in virsh domiflist or in dumpxml, and I then re-write the /etc/udev/rules/70 file in the VM, I can get the eth devices ordered in a predictable way. Is there a virsh way to create a VM from a generic xml file, allowing libvirt to add randomized MAC addresses, and then edit the /etc/udev/rules/70 file in the VM, to associate the eths with the desired MAC? Better yet, is there a way to simply control the assigning of the eths in the generic xml file used to create the VM? So far I can make a wrapper script to virsh create xml, read the addresses back, and then start the VM independently, write to it, and then return control to virsh. That seems clumsy. Virsh ought to be able to control the eths in the VM without resorting to OS-dependent kludges. -- John Fisher

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[libvirt-users] Java API Migration error
by Rustam Singh 07 Dec '12

07 Dec '12

Hi Guys, I am trying to perform live migration of a qemu+kvm guest using the libvirt java api binding. Unfortunately I keep getting this error Exception in thread "main" org.libvirt.LibvirtException: internal error unable to add domain task 1598 to cgroup: No space left on device the number after "domain task" keeps changing on every run, the problem is migration fails with that error, but it migrates just fine if I try to do it using virsh. I'll be delighted if somebody could help me out. Regards.

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Re: [libvirt-users] Virsh cmd virsh -c qemu:///system fail with ssh connect a non-root user.
by yupzhang 07 Dec '12

07 Dec '12

On 12/07/2012 12:56 AM, Eric Blake wrote: > On 12/06/2012 02:53 AM, yupzhang wrote: >> HI Eric, >> >> I have a question about remote access and usermode: >> >> 1.Install a host with graphic,and then configure libvirt environment. >> >> 2.Login with non-root user.Then run: >> $ virsh -c qemu:///system >> Authenticate dialogue will pop up,input the root password,then >> successfully connect qemu:///system. >> >> 3.On another host,connect the host in step 1 with ssh like this: >> #ssh -X yuping(a)10.66.*.* >> input yuping's password.Then ssh to remote yuping user successfully. >> >> 4.Run command: >> $ virsh -c qemu:///system >> error: authentication failed: Authorization requires authentication but >> no agent is available. >> >> error: failed to connect to the hypervisor >> >> Is this a bug? I'm not sure about this,so confirm with you. > Questions like this are better asked to the libvirt-users(a)redhat.com > list, where there are more people available to answer the question. > This particular email nearly got lost in the black hole of a hard disk > failure on my end last week. > > Does the failure also happen when you use 'ssh -A -X' and/or 'ssh -Y' > instead of plain 'ssh -X'? I suspect that this is an expected > limitation of how polkit authentication works, where a local user can be > trusted to provide the credentials needed, but where an ssh session is > not a local user; but as I am not very familiar with the libvirt code > that interacts with polkit, I recommend that you ask the list. > Hi Eric, Thanks for your reply,I have added libvirt-users@ to cc list. I have tried 'ssh -A -X' and 'ssh -Y',still failed: $ virsh -c qemu:///system error: authentication failed: Authorization requires authentication but no agent is available. error: failed to connect to the hypervisor Can anyone help me? Thanks, Yuping >> In my opinion,this command should connect qemu:///system successfully >> with input root password,even with ssh connect to non-root user,the >> behaviour should keep same.Am I right? > Authentication is a tricky matter - there is a difference between a > local user and a user connected through ssh, at least in the eyes of > polkit authentication, and I don't know if the behavior you observe is > intentional or a bug. >

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[libvirt-users] libvirt migrate error
by zhijun liu 06 Dec '12

06 Dec '12

hi,all when I try to migrate `vm0` from (192.168.1.102) to another host(192.168.1.200), the name `ubuntu1204` is 192.168.1.200's hostname. command is : `sudo virsh migrate --live vm0 qemu+tcp://192.168.1.200/system` the error is : unable to connect to server at 'ubuntu1204:49157': Connection refused. however,when I try to virsh connect to 192.168.1.200 by tcp is no problem. I dont know what the port 49157?how to fix it? version:libvirt:0.9.8 system:ubuntu1204 thanks in advance for any reply.

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[libvirt-users] Xen 4.2 with libvirt 1.0.0
by Michael Beham 05 Dec '12

05 Dec '12

Hi, has anyone a running environment with Xen 4.2 and libvirt 1.0.0? I do not get libvirt compiled under the use of Xen 4.2! I always get some errors during compilation of libvirt caused by libxl. But i read some posts that libvirt 1.0.0 should work with Xen 4.2 Cheers, mike

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[libvirt-users] NWFilter and IPv6
by Guido Winkelmann 05 Dec '12

05 Dec '12

Hi, Libvirt's nwfilter ships a number of useful filter scripts by default, but none to handle IPv6 traffic. Is there a particular reason for that, or is that just because nobody has got around to that yet? One interesting thing about dealing with IPv6 traffic is that hosts often have several auto-configured addresses, usually at least one auto-configured link- local address under fe80::/64 and one auto-configured one from router- advertisements. For writing filter rules, it would be nice to have some function/notation to calculate those auto-configured addresses for the user, so we can write something like this: <rule action='return' direction='out' priority='500'> <ipv6 srcipaddr='ipv6_autoconf($IPV6_PREFIX[@1], $IPV6_MASK[@1], $MAC)'/> </rule> <rule action='return' direction='out' priority='500'> <ipv6 srcipaddr='$IPV6'/> </rule> <rule action='drop' direction='out' priority='1000'/> or maybe more like this: <ipv6 mode='autoconf' field='srcipaddr' prefix='$IPV6_PREFIX[@1]' netmask='$IPV6_MASK[@1]' mac='$MAC)'/> Guido

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[libvirt-users] Incorrect currentMemory for qemu-1.2+
by Andrey Korolyov 05 Dec '12

05 Dec '12

Hi, Since this message(https://www.redhat.com/archives/libvirt-users/2012-October/msg00054… qemu folks have released one minor version in the 1.2 branch and shiny new 1.3 some days ago and the problem still persists. At first I has blamed libvirt, but I was not correct at all - since I have released package ``slices'' for myself including both newer libvirth and qemu, I wasn`t able to corner this problem and my report may be counted as completely wrong. Right now, I have the following situation: - all libvirt versions running above qemu-1.1 always reports right balloon and currentMemory sizes - for qemu 1.2 it is quite more funny: as in message above, I receive wrong currentMemory always set to ``magic'' 5398528kB at the 8gb host node, but only if ``memory'' parameter has same or higher value, even <memory unit='KiB'>5348520</memory> works okay, providing righ balloon value for the libvirt. As you can see the ~2700MB offset between current and maximum(or entire host) memory present in both configurations. 8Gb node is a simple non-numa machine so this is not related to numa miscalculation. Previous test at the link above processed on the 64GB two-head node with symmetric numa topology, if it matters. And finally, $ virsh dumpxml vm010-000-000-092 | grep curr <currentMemory unit='KiB'>5398528</currentMemory> $ virsh qemu-monitor-command --hmp vm010-000-000-092 info balloon balloon: actual=1176 Until virtio_balloon initializes in the guest, libvirt reporting _right_ value for some seconds after VM start, so bug (which I unable to track by myself) almost for sure presented in parsing of received values from guest balloon.

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[libvirt-users] Libvirt migration compatible
by Timon Wang 05 Dec '12

05 Dec '12

Hi all, I am use libvirt and kvm for migrate a vm from a pc to a Dell pc server, and the cpu feature are not the same, I am wondering if there is any solution to make the migration works smoothly. The PC's cpu feature is less than Dell pc server, so how to make sure the migration work. Another question is I found a post in 2007, said that AMD has make the migration from amd server to intel server by AMD-V Extended Migration and Intel Flex Migration, can I use these tech in libvirt? -- Focus on: Server Vitualization, Network security,Scanner,NodeJS,JAVA,WWW Blog: http://www.nohouse.net

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[libvirt-users] Strange behavior of QoS
by Davide Guerri 05 Dec '12

05 Dec '12

Hi, I'm having some weird problem with the setup of the QoS on a bridged network. As the docs states, outbound/inbound average speed should be expressed in KBps (KBytes per second) but in order to get a maximum speed of 10Mbps (megabits per second) surprising enough I have to use 2560 on the guest (not 1280 as expected). Using 1280 units I get a speed og 5Mbps. I'm aware of peak and burst parameters but even with them I'm seeing the same (long-term) behavior. Here follows my configuration. Thank you in advance for any help you can provide. Domain definition (relevant part only) virsh # dumpxml mydomain <domain type='kvm' id='45'> [...] <devices> [...] <interface type='network'> <mac address='52:54:00:xx:xx:xx'/> <source network='br909'/> <target dev='vnet43'/> <model type='virtio'/> <bandwidth> <inbound average='2560'/> <outbound average='2560'/> </bandwidth> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> [...] </devices> </domain> The network definition: virsh # net-dumpxml br909 <network> <name>br909</name> <uuid>07319380-2025-cdcc-924a-149cd0370b56</uuid> <forward mode='bridge'/> <bridge name='br909' /> </network> And iperf result (client and server are on the same vlan and they are running on the same host) [ 5] local xx.xx.xx.xx port 5001 connected with xx.xx.xx.yy port 18396 [ 5] 0.0-30.1 sec 35.4 MBytes 9.87 Mbits/sec

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[libvirt-users] Error using virt-convert
by Chandana De Silva 05 Dec '12

05 Dec '12

All, I am trying to use virt-convert to convert a KVM/libvirt guest to VMWare ESX 4, and getting an error. Any help would be greatly appreciated. I have created a virt-image image file as shown at http://people.redhat.com/dlutter/virt-image/virt-image-xml.html. See below for the xml file. I am using the following command for the conversion, and am getting the error shown : /usr/bin/virt-convert -i virt-image -o vmx -D vmdk mon03.xml mon03 ERROR Couldn't import file "mon03.xml": Couldn't import file 'mon03.xml': Disk entry for 'mon03' not found The image file itself is readable by all: ls -la /var/lib/libvirt/imageshelf/mon03.img -rw-r--r-- 1 root m4u 8589934592 Dec 3 09:25 /var/lib/libvirt/imageshelf/mon03.img ls -la mon03.xml -rw-rw-r-- 1 chandana chandana 657 Dec 5 09:08 mon03.xml <image> <name>mon03</name> <domain> <boot type="hvm"> <guest> <arch>i686</arch> </guest> <os> <loader dev="cdrom"/> </os> <drive disk="mon03" target="hda"/> </boot> <devices> <vcpu>2</vcpu> <memory>262144</memory> <interface/> <graphics/> </devices> <storage> <disk id="mon03" file="/var/lib/libvirt/imageshelf/mon03.img" use="system" size="8388608" format="raw"/> </storage> </domain> </image>

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[libvirt-users] Clone disk image common ancestry/branching.
by Mestnik, Michael J - Eagan, MN - Contractor 04 Dec '12

04 Dec '12

Hello, I was wondering if it was possible to support or easily extent libvirt to perform steps like the following when cloning: # Any existing VMs must be paused or better. ln $currentimg backing-store.img qemu-img create -o backing-store.img $currentimg.tmp qemu-img create -o backing-store.img $newimg # Get any existing VM using $currentimg.tmp mv $currentimg.tmp $currentimg The idea being to create branches of an installs ancestry rather than simply duplicating the install. Cheers. Mike Mestnik, Michael J The ESM Tools Enterprise Systems Monitoring United States Postal Service O: (651) 406-2048 Michael.J.Mestnik(a)usps.gov ITEnterpriseSystemsMonitoring(a)usps.gov

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[libvirt-users] Strange QoS behavior
by Davide Guerri 04 Dec '12

04 Dec '12

Hi, I'm having some weird problem with the setup of the QoS on a bridged network. As the docs states, outbound/inbound average speed should be expressed in KBps (KBytes per second) but in order to get a maximum speed of 10Mbps (megabits per second) surprising enough I have to use 2560 on the guest (not 1280 as expected). Using 1280 units I get a speed og 5Mbps. I'm aware of peak and burst parameters but even with them I'm seeing the same (long-term) behavior. Here follows my configuration. Thank you in advance for any help you can provide. Domain definition (relevant part only) virsh # dumpxml mydomain <domain type='kvm' id='45'> [...] <devices> [...] <interface type='network'> <mac address='52:54:00:xx:xx:xx'/> <source network='br909'/> <target dev='vnet43'/> <model type='virtio'/> <bandwidth> <inbound average='2560'/> <outbound average='2560'/> </bandwidth> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> [...] </devices> </domain> The network definition: virsh # net-dumpxml br909 <network> <name>br909</name> <uuid>07319380-2025-cdcc-924a-149cd0370b56</uuid> <forward mode='bridge'/> <bridge name='br909' /> </network> And iperf result (client and server are on the same vlan and they are running on the same host) [ 5] local xx.xx.xx.xx port 5001 connected with xx.xx.xx.yy port 18396 [ 5] 0.0-30.1 sec 35.4 MBytes 9.87 Mbits/sec

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[libvirt-users] error: unsupported configuration: block I/O throttling not supported with this QEMU binary
by hzguanqiang 03 Dec '12

03 Dec '12

Hi, guys. I want to change block I/O throttle using 'virsh blkdeviotune' with vm not running, it reported an error: # virsh blkdeviotune instance-000000dc /dev/loop0 --total-bytes-sec 20000000 --total-iops-sec 20 --config error: Unable to change block I/O throttle error: unsupported configuration: block I/O throttling not supported with this QEMU binary I can do this when the vm is running. Is it a bug? How can I fix this problem. BTW,My libvirt version is 0.9.13: # virsh version Compiled against library: libvir 0.9.13 Using library: libvir 0.9.13 Using API: QEMU 0.9.13 Running hypervisor: QEMU 1.1.2 Thanks. 2012-11-28 hzguanqiang

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[libvirt-users] iSCSI storage pool autostart
by rh ev 03 Dec '12

03 Dec '12

Hello everyone, I have recently installed libvirt 1.0.0 and am having a problem with my iSCSI storage pool's autostarting. They are just going to an inactive state right after a reboot of the host. However once the startup is complete I can manually start the pool without problem. I am getting the following errors in the libvirtd.log file but they don't really give me much as to what could be causing this. I also looked in the messages log file but didn't find anything that looked useful. *2012-11-27 20:06:50.845+0000: 1358: error : virCommandWait:2287 : internal error Child process (/sbin/iscsiadm –mode session) unexpected exit status 21 * *2012-11-27 20:06:50.890+0000: 1358: error : virCommandWait:2287 : internal error Child process (/sbin/iscsiadm –mode session) unexpected exit status 21 * *2012-11-27 20:07:10.159+0000: 1358: error : virCommandWait:2287 : internal error Child process (/sbin/iscsiadm –mode discovery –type sendtargets –portal 192.168.220.50:3260,1) unexpected exit status 4* *2012-11-27 20:07:10.159+0000: 1358: error : storageDriverAutostart:101 : Failed to autostart storage pool ‘stoPool01′: internal error Child process (/sbin/iscsiadm –mode discovery –type sendtargets –portal 192.168.220.50:3260,1) unexpected exit status 4* If anyone has any ideas what is causing this it would be a great help. If you need more information let me know. Thanks, Darcy

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