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[libvirt-users] bootloader_args element
by David Grundy 13 Oct '10

13 Oct '10

I am trying to set the hostname of VMs at boot time and banging my head against the wall. I am using virsh create xen-config.xml to boot a Scientific Linux 5.5 image. I have gone through the libvirt domain xml format at http://libvirt.org/formatdomain.html#elementsResources and I don't see anywhere to set the hostname in there. I am using pygrub for the bootloader and noticed the "bootloader_args" element. Can I pass an argument to the kernel at boot to set the hostname? Can I pass anything to the kernel at boot time? Nothing I have tried seems to work. I have tried sifting through the pygrub code (for lack of documentation) and no luck yet. I think my challenge is with pygrub but any help would be appreciated. I have also posted this at http://lists.xensource.com/archives/html/xen-users/2010-10/msg00143.html and http://www.linuxquestions.org/questions/linux-virtualization-90/setting-hos… but still waiting... Cheers, David

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[libvirt-users] Mac OS X: dyld: lazy symbol binding failed
by Mitchell Hashimoto 13 Oct '10

13 Oct '10

I'm using the Ruby/FFI libvirt library and getting this consistently on Mac OS X: ruby-1.9.2-p0 > FFI::Libvirt.virInitialize dyld: lazy symbol binding failed: Symbol not found: _virThreadInitialize Referenced from: /usr/local/lib/libvirt.dylib Expected in: flat namespace dyld: Symbol not found: _virThreadInitialize Referenced from: /usr/local/lib/libvirt.dylib Expected in: flat namespace Trace/BPT trap I exported DYLD_PRINT_LIBRARIES and it shows that libvirt.dylib is loaded in the process space, but the above still occurs. When I statically link into a C program it works fine, however. Anyone have any idea what could be causing this? If this doesn't get a response, I'll post it to the dev list, since its perhaps relevant to them as well. Thanks, Mitchell

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Re: [libvirt-users] Problems with libvirt / qemu
by Dan Johansson 12 Oct '10

12 Oct '10

Yes, the image contains an OS (it works if I start the guest manually). -- Dan On Monday 11 October 2010 03.41:29 jbuy0710 wrote: > The image contains an OS or not? > If not, you can't choose to boot from disk like "<boot dev='hd'/>" > > 2010/10/10 Dan Johansson <kvm(a)dmj.nu>: > > HI, > > > > I have a small problem with libvirt / qemu. I have created a guest and when I start it from the command-line the guests starts OK, but when I start the guest through libvirt with "virsh start" I get "Booting from Hard Disk... > > Boot failed: not a bootable disk > > No bootable device" > > > > This is the command-line I use to start the guest (which works) > > "cd /var/lib/kvm/Wilmer; /usr/bin/qemu-system-x86_64 --enable-kvm \ > > -net nic,vlan=1,model=rtl8139,macaddr=DE:ED:BE:EF:01:03 -net tap,vlan=1,ifname=qtap13,script=no,downscript=no \ > > -net nic,vlan=3,model=rtl8139,macaddr=DE:ED:BE:EF:03:03 -net tap,vlan=3,ifname=qtap33,script=no,downscript=no \ > > -m 2048 -k de-ch -vnc :3 -daemonize \ > > Wilmer.qcow2" > > > > > > The libvirt XML-file was created using "virsh domxml-from-native qemu-argv" and this is the result of that conversion: > > <domain type='kvm'> > > <name>wilmer</name> > > <uuid>a421968d-0573-1356-8cb7-32caff525a03</uuid> > > <memory>2097152</memory> > > <currentMemory>2097152</currentMemory> > > <vcpu>2</vcpu> > > <os> > > <type arch='x86_64' machine='pc-0.12'>hvm</type> > > <boot dev='hd'/> > > </os> > > <features> > > <acpi/> > > </features> > > <clock offset='utc'/> > > <on_poweroff>destroy</on_poweroff> > > <on_reboot>restart</on_reboot> > > <on_crash>destroy</on_crash> > > <devices> > > <emulator>/usr/bin/qemu-system-x86_64</emulator> > > <disk type='file' device='disk'> > > <source file='/var/lib/kvm/Wilmer/Wilmer.qcow2'/> > > <target dev='hda' bus='ide'/> > > <address type='drive' controller='0' bus='0' unit='0'/> > > </disk> > > <controller type='ide' index='0'> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> > > </controller> > > <interface type='ethernet'> > > <mac address='de:ed:be:ef:01:03'/> > > <script path='no'/> > > <target dev='qtap13'/> > > <model type='rtl8139'/> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> > > </interface> > > <interface type='ethernet'> > > <mac address='de:ed:be:ef:03:03'/> > > <script path='no'/> > > <target dev='qtap33'/> > > <model type='rtl8139'/> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> > > </interface> > > <input type='mouse' bus='ps2'/> > > <graphics type='vnc' port='5903' autoport='no' listen=''/> > > <video> > > <model type='cirrus' vram='9216' heads='1'/> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> > > </video> > > </devices> > > </domain> > > > > > > Anyone seeing something obvious that I have missed? > > > > Regards, > > -- > > Dan Johansson, <http://www.dmj.nu> > > *************************************************** > > This message is printed on 100% recycled electrons! > > *************************************************** > > > > _______________________________________________ > > libvirt-users mailing list > > libvirt-users(a)redhat.com > > https://www.redhat.com/mailman/listinfo/libvirt-users > > > -- Dan Johansson, <http://www.dmj.nu> *************************************************** This message is printed on 100% recycled electrons! ***************************************************

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[libvirt-users] Problems with libvirt / qemu
by Dan Johansson 11 Oct '10

11 Oct '10

HI, I have a small problem with libvirt / qemu. I have created a guest and when I start it from the command-line the guests starts OK, but when I start the guest through libvirt with "virsh start" I get "Booting from Hard Disk... Boot failed: not a bootable disk No bootable device" This is the command-line I use to start the guest (which works) "cd /var/lib/kvm/Wilmer; /usr/bin/qemu-system-x86_64 --enable-kvm \ -net nic,vlan=1,model=rtl8139,macaddr=DE:ED:BE:EF:01:03 -net tap,vlan=1,ifname=qtap13,script=no,downscript=no \ -net nic,vlan=3,model=rtl8139,macaddr=DE:ED:BE:EF:03:03 -net tap,vlan=3,ifname=qtap33,script=no,downscript=no \ -m 2048 -k de-ch -vnc :3 -daemonize \ Wilmer.qcow2" The libvirt XML-file was created using "virsh domxml-from-native qemu-argv" and this is the result of that conversion: <domain type='kvm'> <name>wilmer</name> <uuid>a421968d-0573-1356-8cb7-32caff525a03</uuid> <memory>2097152</memory> <currentMemory>2097152</currentMemory> <vcpu>2</vcpu> <os> <type arch='x86_64' machine='pc-0.12'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/bin/qemu-system-x86_64</emulator> <disk type='file' device='disk'> <source file='/var/lib/kvm/Wilmer/Wilmer.qcow2'/> <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='ethernet'> <mac address='de:ed:be:ef:01:03'/> <script path='no'/> <target dev='qtap13'/> <model type='rtl8139'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </interface> <interface type='ethernet'> <mac address='de:ed:be:ef:03:03'/> <script path='no'/> <target dev='qtap33'/> <model type='rtl8139'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </interface> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='5903' autoport='no' listen=''/> <video> <model type='cirrus' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> </devices> </domain> Anyone seeing something obvious that I have missed? Regards, -- Dan Johansson, <http://www.dmj.nu> *************************************************** This message is printed on 100% recycled electrons! ***************************************************

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[libvirt-users] Error while starting the domain "error: monitor socket did not show up.: Connection refused"
by Ravi Pawar 08 Oct '10

08 Oct '10

All, here is my domain xml <domain type='kvm'> <name>tests</name> <uuid>76bc677f-ee5b-ef0b-1d02-72d12785b1d8</uuid> <memory>524288</memory> <currentMemory>524288</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='pc-0.12'>hvm</type> <boot dev='network'/> </os> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/libexec/qemu-kvm</emulator> <disk type='file' device='disk'> <source file='/var/lib/libvirt/images/testKVM'/> <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <controller type='ide' index='0'/> <interface type='network'> <mac address='52:54:00:a4:0e:ce'/> <source network='default'/> <target dev='vnet0'/> </interface> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes' listen='127.0.0.1' keymap='en-us'/> <video> <model type='cirrus' vram='9216' heads='1'/> </video> </devices> </domain> my host is RHEL 6 beta. i don't have any clue where i am going wrong in the configuration of the host or configuration of the domain. -- Thanks & Regards Ravi Pawar

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[libvirt-users] Ruby-libvirt and openAuth
by Jonathan Kelley 07 Oct '10

07 Oct '10

Hello, It looks like the Ruby bindings do not support virConnectOpenAuth. Is this true? If so, is there any reason why? or plans to? Thanks, Jon

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[libvirt-users] Monitoring and statistics through libvirt
by Tomi 06 Oct '10

06 Oct '10

Hi folks, is it possible to monitor and gather statistics in realtime (CPU, memory, HDD, network, ... - something like dstat) of guest systems with libvirt through console from host system (KVM based)? If yes, do those guests need to be created through libvirt? Thanks for your help and time.

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[libvirt-users] [PATCH] Re: Python XML parsing of domain descriptions?
by James M Leddy 06 Oct '10

06 Oct '10

rp.gs.com> Jon, Would you try with this patch? diff -c libvirt-0.6.3/docs/schemas/domain.rng libvirt-0.6.3.updateschema/docs/schemas/domain.rng *** libvirt-0.6.3/docs/schemas/domain.rng 2010-07-23 12:44:45.000000000 -0400 --- libvirt-0.6.3.updateschema/docs/schemas/domain.rng 2010-10-05 14:17:16.700561725 -0400 *************** *** 150,155 **** --- 150,156 ---- </attribute> <attribute name="machine"> <choice> + <value>rhel5.4.0</value> <value>xenfv</value> <value>pc</value> <value>isapc</value> -- James M. Leddy Technical Account Manager Red Hat Inc.

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[libvirt-users] KVM Live Migration
by Mike Hall 06 Oct '10

06 Oct '10

We have the following test environment: 2 x CentOS 5.5 KVM virtual hosts 2 x CentOS 5.5 network storage boxes with NFS shares on LVs on DRBD (primary/secondary, no HA, just replication). We have installed both CentOS and Win7 guests which live migrate almost instantly between hosts using Virt Manager (or virsh migrate). The problem is that the guests does not retain their running state after migration, but instead arrive on the new host in "reboot after unclean shutdown" state. The migrated machines also lose IP connectivity (static IP) upon migration to new host, but regain it on migration back to original host. So, live migration in this case isn't producing the expected results (a running, usable guest). Same results using "migrate offline" option and pausing machines before migration. Any pointers on what we're doing wrong? Is there a need for us to implement hook scripts? Michael Hall IT Communications Officer Alice Springs Town Council mhall(a)astc.nt.gov.au (08) 8950 0561

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[libvirt-users] Mounting an lvm
by Dale Amon 06 Oct '10

06 Oct '10

I converted a system disk from a virtualbox VM and added to the config on a qemu VM. All seems well until I try to mount it. The virtual machine shows data for the disk image using commands like: pvs lvs lvdisplay xena-1 but there is no /dev/xena-1/root to be mounted. I also cannot seem to figure out whether the lvm related modules are available for the virtual machine kernel. Has anyone else tried playing this game?

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