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[libvirt-users] availability of snapshots functionality via Python bindings
by Marcin Krol 04 Jan '11

04 Jan '11

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello everyone, Is this being worked on? I rather need this thing... Although my system is Debian Lenny, not RH: kulfon 10.0.0.228 /etc/default % dpkg -l | grep libvirt ii libvirt-bin 0.4.6-10+lenny1 the programs for the libvirt library ii libvirt0 0.4.6-10+lenny1 library for interfacing with different virtualization systems ii python-libvirt 0.4.6-10+lenny1 libvirt Python bindings I don't see anything like snapshots available via libvirt.virDomain: >>> dir(dom0) ['ID', 'OSType', 'UUID', 'UUIDString', 'XMLDesc', '__del__', '__doc__', '__init__', '__module__', '_conn', '_o', 'attachDevice', 'autostart', 'blockPeek', 'blockStats', 'connect', 'coreDump', 'create', 'destroy', 'detachDevice', 'info', 'interfaceStats', 'maxMemory', 'maxVcpus', 'memoryPeek', 'migrate', 'name', 'pinVcpu', 'reboot', 'resume', 'save', 'schedulerParameters', 'schedulerType', 'setAutostart', 'setMaxMemory', 'setMemory', 'setSchedulerParameters', 'setVcpus', 'shutdown', 'suspend', 'undefine', 'vcpus'] - -- Regards, mk - -- Premature optimization is the root of all fun. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJNIgnXAAoJEFMgHzhQQ7hO86AIAIxQkWyYJ3vAsP579Geb0hhj XbkU2BSlxAkxToBoPoOYnS+W5ZlSf0/kqwJh2yQDCCCfwUXJ7k+QLQfTlJB+qOAZ xB/gA7c9wQLiHERWSYk81DoQWeatgHt/7G2cSP2G5O7I1l0C61mLEZQAQ8SqQ9Ay hVi7DhVX0qCNJTLAoN/C0ZLOAzRAnrKj2LOpqjBqU7CzD2Zx60FoUElRebSuiv8x aPPNgk5c7XQsEx+aXteobWwHdrlSeWXg4yomXrGQZ5CcJSTzQst0juhesK0CvdFM 6cLhBoAqI0C94CFNm1f2XP2ytnrCIQc3SXBNgHhy4SosqGE9+XMBLwq70OIYGCI= =Q9VB -----END PGP SIGNATURE-----

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[libvirt-users] VMware ESX 4.0 won't reboot guests.
by Patric Falinder 29 Dec '10

29 Dec '10

Hi, I just compiled libvirt with ESX support. I can login just fine, list all the guests/domains but when I try to reboot or shutdown one of my guests/domains I get this error: virsh # reboot dbcluster1 error: Failed to reboot domain dbcluster1 error: internal error HTTP response code 500 for call to 'RebootGuest'. Fault: ServerFaultCode - fault.RestrictedVersion.summary And nothing happens. I'm logged in as root so it shouldn't be any permission-related problems right!? because I can reboot it just fine with the vSpehere Client on one of my Windows boxes. In vSpehere I see this in Recent Tasks after I execute the reboot command: Find entity by UUID I can't find anything about this on Google either. Does anyone know what's wrong here? Thanks, -Patric

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[libvirt-users] Mapping partitions rather than disks into a Libvirt managed KVM guest
by Steven Ellis 24 Dec '10

24 Dec '10

I'm trying to migrate some XEN based environments over to KVM and I'm having a couple of issues with how I'm currently managing the storage On my Xen Server I have a bunch of LVM based partitions that are mapped into the guests as partitions rather than disks For example /dev/VIrtVG/server-home maps to /dev/sda2 which is mounted as /home in the guest. Is there a simple way to reproduce this using KVM and libvirt rather than needing enough spare space to turn each of these partitions into virtual disks. One method I've tried is using mdadm with linear to create a partition table stub but i'm a little worries about data integrity. dd if=/dev/zero of=/root/dummy.mbr count=256 losetup -f /root/dummy.mbr mdadm --build --verbose /dev/md0 --chunk=128 --level=linear --raid-devices=2 /dev/loop0 /dev/VIrtVG/server-home Then try to setup a partition table with fdisk. Any other recommendations? Thanks Steve

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[libvirt-users] ICMP into guest not "working"
by David Lane 23 Dec '10

23 Dec '10

Good afternoon. I have a RHEL6 host, running RHEL 3.8 as a guest. The NIC is bridged. From the guest, I can ping successfully to a variety of network devices. From the host, I can ping successfully to a variety of network devices AND the guest OS. But from my workstation, I can only ping the HOST, not the guest. And it looks like the packets are being discarded. IPtables is NOT enabled on either the guest or the host (our application does not support iptables filtering - go figure). I am seeing lots of documentation for enabling outbound pings from guest, but very little about enabling inbound pings. And again, our software relies on pings for parts of its operations and validations. Any clues as to what I might have missed? Thanks, DAVID -- David A. Lane, KG4GIY EC/RO Prince William County ARES®/RACES +1.703.628.3868 http://www.pwcares.org/ http://www.linuxjournal.com/forums/hot-topics/ham-radio IM/Skype/Twitter: kg4giy

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[libvirt-users] Anyone interested in forming a libvirt "docs" team?
by Justin Clift 22 Dec '10

22 Dec '10

Hi all, There's a lot of documentation for libvirt that needs improving, so wondering if anyone would be interested in forming a libvirt "docs" team to help make that happen? While some of the documentation needs people familiar with specific pieces of libvirt, there's also a lot that doesn't, and just needs people with some free time and willingness to help. Anyone up for it? :) Regards and best wishes, Justin Clift

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[libvirt-users] private DNS servers & dnsmasq
by Quint Van Deman 22 Dec '10

22 Dec '10

Hello-- I'm trying to work through the last piece of the puzzle regarding dns resolution for my guests. To do so I'd like to be able to pass the following to the dnsmasq child process: -S /private.net/127.0.0.1 (as referenced in the dnsmasq man page) -S /sub.private.net/127.0.0.1 However, I cannot find any documentation that suggests the xml schema defining the virtual network supports this option. Is there a way of doing this? The ability to pass a '-q' (log queries) would be nice too for debugging purposes. My DNS setup is all working properly (as confirmed with dig & server overrides throughout the environment), but resolv.conf based resolution isn't able to find servers for either of those two domains (dnsmasq is trying to resolve them via an upstream server, which obviously fails). Thanks for any advice. -Quint

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[libvirt-users] Error creating a new vm
by Anthony Davis 21 Dec '10

21 Dec '10

Hi, I wonder if anyone can help me with this, I have been trying to get a vm up and running for a while now and cant for the life of me work out why it isnt working. The errors I get arnt very helpful and im at a loss as how to debug this any further. Here is the command and output that I get...(Also nothing shows up with virsh list --all after so its starting to install then dropping out) Hope someone can help. Thanks! [root@server ~]# /usr/bin/virt-install -n test01 -r 512 --os-variant=virtio26 -l http://172.16.0.100/iso/centos-5.5/ --nographics --noautoconsole --disk path=/dev/vg_storage/test01, bus=virtio -w bridge:br0 -x "console=ttyS0 ks=http://172.16.0.100/ks/ks-vm.cfg" -d -v Sun, 19 Dec 2010 20:45:05 DEBUG Requesting libvirt URI default Sun, 19 Dec 2010 20:45:05 DEBUG Received libvirt URI 'qemu:///system' Sun, 19 Dec 2010 20:45:05 DEBUG Requesting virt method 'hvm' Sun, 19 Dec 2010 20:45:05 DEBUG Received virt method 'hvm' Sun, 19 Dec 2010 20:45:05 DEBUG Hypervisor name is 'qemu' Sun, 19 Dec 2010 20:45:05 DEBUG parse_disk: returning ('/dev/vg_storage/test01', None, None, 'disk', None, False, False, None, True, None) Sun, 19 Dec 2010 20:45:05 DEBUG Setting size for existing storage to '10.0' Sun, 19 Dec 2010 20:45:05 DEBUG Detected storage as type 'block' Sun, 19 Dec 2010 20:45:05 DEBUG Setting size for existing storage to '10.0' Sun, 19 Dec 2010 20:45:05 DEBUG Detected storage as type 'block' Sun, 19 Dec 2010 20:45:05 DEBUG Setting size for existing storage to '10.0' Sun, 19 Dec 2010 20:45:05 DEBUG Detected storage as type 'block' Sun, 19 Dec 2010 20:45:05 DEBUG Setting os type to 'linux' for variant 'virtio26' Sun, 19 Dec 2010 20:45:05 DEBUG DistroInstaller location is a network source. Starting install... Sun, 19 Dec 2010 20:45:05 DEBUG Attempting to detect distro: Sun, 19 Dec 2010 20:45:05 DEBUG HTTP hasFile: didn't find http://172.16.0.100/iso/centos-5.5/.treeinfo Sun, 19 Dec 2010 20:45:05 DEBUG HTTP hasFile: didn't find http://172.16.0.100/iso/centos-5.5/Fedora Sun, 19 Dec 2010 20:45:05 DEBUG HTTP hasFile: didn't find http://172.16.0.100/iso/centos-5.5/Server Sun, 19 Dec 2010 20:45:05 DEBUG HTTP hasFile: didn't find http://172.16.0.100/iso/centos-5.5/Client Sun, 19 Dec 2010 20:45:05 DEBUG HTTP hasFile: didn't find http://172.16.0.100/iso/centos-5.5/RedHat Sun, 19 Dec 2010 20:45:05 DEBUG Detected a CentOS distro Sun, 19 Dec 2010 20:45:05 DEBUG Fetching URI: http://172.16.0.100/iso/centos-5.5/images/pxeboot/vmlinuz Sun, 19 Dec 2010 20:45:05 DEBUG Saved file to /var/lib/libvirt/boot/virtinst-vmlinuz.MKBsh1 Retrieving file vmlinuz... | 1.9 MB 00:00 Sun, 19 Dec 2010 20:45:05 DEBUG Fetching URI: http://172.16.0.100/iso/centos-5.5/images/pxeboot/initrd.img Sun, 19 Dec 2010 20:45:05 DEBUG Saved file to /var/lib/libvirt/boot/virtinst-initrd.img.T2dfhc Retrieving file initrd.img... | 7.7 MB 00:00 Sun, 19 Dec 2010 20:45:05 DEBUG Creating guest from: <domain type='qemu'> <name>test01</name> <currentMemory>524288</currentMemory> <memory>524288</memory> <uuid>5cbb288b-d9f7-bae4-0d05-9157553f53fe</uuid> <os> <type arch='x86_64'>hvm</type> <kernel>/var/lib/libvirt/boot/virtinst-vmlinuz.oddwKg</kernel> <initrd>/var/lib/libvirt/boot/virtinst-initrd.img.POxZ5X</initrd> <cmdline>method=http://172.16.0.100/iso/centos-5.5/ console=ttyS0 ks=http://172.16.0.100/ks/ks-vm.cfg</cmdline> </os> <features> <acpi/><apic/><pae/> </features> <clock offset="utc"/> <on_poweroff>destroy</on_poweroff> <on_reboot>destroy</on_reboot> <on_crash>destroy</on_crash> <vcpu>1</vcpu> <devices> <emulator>/usr/bin/qemu-system-x86_64</emulator> <console type='pty'/> <disk type='block' device='disk'> <driver name='qemu' cache='none'/> <source dev='/dev/vg_storage/test01'/> <target dev='hda' bus='ide'/> </disk> <interface type='bridge'> <source bridge='br0'/> <mac address='54:52:00:66:25:22'/> </interface> <input type='mouse' bus='ps2'/> </devices> </domain> Sun, 19 Dec 2010 20:44:48 DEBUG Removing /var/lib/libvirt/boot/virtinst-vmlinuz.oddwKg Sun, 19 Dec 2010 20:44:48 DEBUG Removing /var/lib/libvirt/boot/virtinst-initrd.img.POxZ5X Sun, 19 Dec 2010 20:44:48 ERROR internal error Domain ims-gl-lin01g01 didn't show up Domain installation may not have been successful. If it was, you can restart your domain by running 'virsh start test01'; otherwise, please restart your installation. Sun, 19 Dec 2010 20:44:48 ERROR internal error Domain test01 didn't show up Traceback (most recent call last): File "/usr/bin/virt-install", line 889, in ? main() File "/usr/bin/virt-install", line 751, in main start_time, guest.start_install) File "/usr/bin/virt-install", line 813, in do_install dom = install_func(conscb, progresscb, wait=(not wait)) File "/usr/lib/python2.4/site-packages/virtinst/Guest.py", line 541, in start_install return self._do_install(consolecb, meter, removeOld, wait) File "/usr/lib/python2.4/site-packages/virtinst/Guest.py", line 633, in _do_install self.domain = self.conn.createLinux(install_xml, 0) File "/usr/lib64/python2.4/site-packages/libvirt.py", line 974, in createLinux if ret is None:raise libvirtError('virDomainCreateLinux() failed', conn=self) libvirtError: internal error Domain ims-gl-lin01g01 didn't show up

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[libvirt-users] libvirt unavailable while a VM is in migration?
by Igor Serebryany 21 Dec '10

21 Dec '10

Hi, I am running libvirt 0.8.6 on qemu (kvm, really) 0.12.5. I have noticed that while a live migration is running, I cannot do anything else with libvirt -- even 'virsh list' blocks without output until the migration is almost done. (At that point 'virsh list' will dump a final screen showing the VM I just migrated as 'running'; the next run of 'virsh list' no longer displays the VM -- this is why I say "almost done".) Is there anything I can do to prevent this? Is there a fix for this coming? MORE DETAILS: I open a connection to a remote libvirt instance and begin a live-migration using: domain.migrate(remoteCon, flags, None, None, 0) My flags are: flags = libvirt.VIR_MIGRATE_PEER2PEER | libvirt.VIR_MIGRATE_LIVE | libvirt.VIR_MIGRATE_UNDEFINE_SOURCE | libvirt.VIR_MIGRATE_TUNNELLED Thanks, --Igor

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[libvirt-users] using virDomainMigrateSetMaxDowntime
by Igor Serebryany 20 Dec '10

20 Dec '10

I would like to use the virDomainMigrateSetMaxDowntime but I'm a bit confused about how to use it. If I try to set the downtime before I call domain.migrate(), I get the error "domain is not being migrated". But I cannot call it afterwards because domain.migrate() does not return until the migration has completed. Am I meant to put the call to domain.migrate() into a separate thread of control, and then call SetMaxDowntime from my main thread after the migration has begun? How do I even know if the migration has begun? Thanks! --Igor

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[libvirt-users] Problems Installing KVM Guest + Console Access
by tony＠specialistdevelopment.com 20 Dec '10

20 Dec '10

Hi, Im having real issues with getting a kvm guest up and running on CentOS 5.5 I have expanded the iso to a path on my system as I have been told that the -x (extra arguments) will not work with the -cdrom option, so I am now using -location, but still the extra arguments are not being picked up. So what do I need to do to get a guest up and working with console access to view the install as its driving me crazy. Thanks Tony

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