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[libvirt-users] Pivot without copy
by Mathew Moon 19 May '15

19 May '15

Hi, Is it possible to "pivot" to a new image without doing blockcopy or blockpull? I know how to use snapshots and blockpull to create a new image and pivot to using it live, but what I would like to do is to have a VM switch from using imageA.qcow2 to image2.qcow2 while running. I don't see why this wouldn't be possible since some of the existing libvirt tools can do this when they are done. I would love to see an example from a bash terminal as well as how it would be done using the python API. Regards, Mathew

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[libvirt-users] Hardware requirements for SPICEd desktops
by Lucio Crusca 19 May '15

19 May '15

Hello, I posted the following to the kvm list yesterday, but now I suspect this is a more appropriate place to ask... I'm considering to build a new server and to use SPICE protocol to deploy all the Windows guests to the local network. It's my understanding that: 1. I should create the guests on the server 2. I should use remote-viewer on a minimal desktop linux on the clients over SPICE protocol 3. I should enable QXL on the server 4. I can get clients USB ports and soundcards working in the guests Now, assuming I've understood the above correctly, I haven't understood what are the hardware requirements server and client side: 1. Let's say I assign 4GB of RAM to each guest and that the network has 20 running guests at any given time, should the server have at least 80GB (20 by 4) of RAM or can I "oversell" a bit and bet on the fact that only few guests will actually use 4GB? 2. What's a reasonable amount of RAM to have installed client-side, for 4GB-RAM guests? 3. Should the clients have a CPU that supports VT-x? 4. Is it possible to have QXL supported on the clients regardless of the physical video adapter installed? 5. And what about the soundcard support? Will any linux-supported soundcard do on the clients?

1 1

[libvirt-users] Live Migration failure: An error occurred, but the cause is unknown
by RockCui＠zhaoxin.com 14 May '15

14 May '15

Hi everyone, I’m testing the new Openstack Kilo on Ubuntu-15.04 and hypervisor is KVM. I can creat instance successfully , but live migration is always failed. Error report like this (from nova-compute.log on a compute node): 2015-05-12 18:11:12.753 3641 INFO nova.virt.libvirt.driver [-] [instance: cee4965c-b298-4b5b-8669-bee9ac72c720] Migration running for 0 secs, memory 0% remaining; (bytes processed=0, remaining=0, total=0) 2015-05-12 18:11:16.342 3641 ERROR nova.virt.libvirt.driver [-] [instance: cee4965c-b298-4b5b-8669-bee9ac72c720] Live Migration failure: An error occurred, but the cause is unknown 2015-05-12 18:11:16.777 3641 ERROR nova.virt.libvirt.driver [-] [instance: cee4965c-b298-4b5b-8669-bee9ac72c720] Migration operation has aborted If someone has a clue what may cause this, pls help. Thanks. Rock Cui 本邮件仅针对指定的收件人发送并可能含有保密或专有内容。任何非指定收件人所为之查阅、转发或使用本信息是不被允许的。如果您误收到本邮件，请立即告知发件人并删除本邮件及所有附件。谢谢！ The information transmitted in this e-mail is intended only for the addressee and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of this information by persons or entities other than the intended recipient is prohibited. If you received this e-mail in error, please notify the sender immediately, and delete this e-mail and any attachments. Thank you.

2 1

[libvirt-users] libvirtError: this function is not supported by the connection driver: virDomainSnapshotNum
by big strong 12 May '15

12 May '15

I tried to create && open a snapshot of xen and the error appears. Is there anyway to support xen snapshotting with libxl/libvirt? This blog http://searchservervirtualization.techtarget.com/tip/Creating-snapshots-in-… offers two way to backup xen vm with linux commands, can we integrate it into libvirt?

2 1

[libvirt-users] Qemu crash detection clarification
by Vasileios Anagnostopoulos 11 May '15

11 May '15

Hi, I am interested in the API of libvirt to detect the evnt that a domain has crashed. I am using QEMU hypervisor. I saw through a commit https://bugzilla.redhat.com/show_bug.cgi?id=636164 that a panic device has been added. However in the TODO list http://wiki.libvirt.org/page/Todo#Hypervisor_driver I found out that crash detection is not supported. What is the status of QEMU crash detection through the libvirt API? thanks -- Dr. Vasileios Anagnostopoulos (MSc,PhD) Researcher/Developer ICCS/NTUA 9 Heroon Polytechneiou Str., Zografou 15773 Athens,Greece T (+30) 2107723404 M (+30) 6936935388 E vanag(a)mail.ntua.gr<mailto:vanag@mail.ntua.gr> www.ntua.gr< http://www.ntua.gr/>

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[libvirt-users] Editing http://libvirt.org/sources/virshcmdref/html-single/#sect-attach-device
by Mauricio Tavares 11 May '15

11 May '15

I just noticed the entries on attach-disk and attach-devices are a bit on the empty size. As I am just attaching a usb device to one of my vm clients, I was wondering if I could offer examples to those entries.

3 2

[libvirt-users] vnetX interface name persistence
by Lucas Brasilino 08 May '15

08 May '15

Hi! I'm aware that (host side) vnetX are created when VM boots. But I'm trying to figure out a way ti create a persistence in vnetX names. What I mean is, say, I want to associate VMs vm0 to vnet0, vm1 to vnet1, vm2 to vnet2 and so forth, no matter which order the VMs are booted. I looked around network XML format, but did't find something... Since I'm using Open vSwitch as bridge, and it is controlled by my OpenFlow application, I can query for OF ports numbers based on port names (interfaces names). OVSDB can be used for such query, but the controller I'm using, Pox, has a limited support to it (stills in development). I'm using libvirt 1.0.5 and Qemu/KVM 1.4.2 on a Fedora 19 host. Thanks a lot in advance. -- Att Lucas Brasilino MSc Student @ Federal University of Pernambuco (UFPE) / Brazil twitter: @lucas_brasilino

2 1

[libvirt-users] Failed dependencies with perl-Sys-Virt
by xuanmao_001 08 May '15

08 May '15

Hi, erveryone: I compiled libvirt-1.1.2.tar.gz from source. my compile step: ./configure --prefix=/usr --libdir=/usr/lib64 --without-xen --without-xen-inotify \ --without-uml --without-openvz --without-vmware --without-vbox --without-lxc \ --without-esx --without-parallels --without-phyp -- without-test --with-yajl \ --without-selinux --without-secdriver-selinux make && make install #ls -l /usr/lib64/libvirt* -rw-r--r-- 1 root root 10144610 2月 6 15:34 /usr/lib64/libvirt.a -rwxr-xr-x 1 root root 1018 5月 8 19:51 /usr/lib64/libvirt.la -rwxr-xr-x 1 root root 1064 5月 8 19:51 /usr/lib64/libvirt-lxc.la lrwxrwxrwx 1 root root 23 5月 8 19:51 /usr/lib64/libvirt-lxc.so -> libvirt-lxc.so.0.1001.2 lrwxrwxrwx 1 root root 23 5月 8 19:51 /usr/lib64/libvirt-lxc.so.0 -> libvirt-lxc.so.0.1001.2 -rwxr-xr-x 1 root root 75419 5月 8 19:51 /usr/lib64/libvirt-lxc.so.0.1001.2 -rw-r--r-- 1 root root 78856 2月 6 15:34 /usr/lib64/libvirt-qemu.a -rwxr-xr-x 1 root root 1070 5月 8 19:51 /usr/lib64/libvirt-qemu.la lrwxrwxrwx 1 root root 24 5月 8 20:31 /usr/lib64/libvirt-qemu.so -> libvirt-qemu.so.0.1001.2 lrwxrwxrwx 1 root root 24 5月 8 20:31 /usr/lib64/libvirt-qemu.so.0 -> libvirt-qemu.so.0.1001.2 -rwxr-xr-x 1 root root 74097 5月 8 19:51 /usr/lib64/libvirt-qemu.so.0.1001.2 lrwxrwxrwx 1 root root 19 5月 8 20:31 /usr/lib64/libvirt.so -> libvirt.so.0.1001.2 lrwxrwxrwx 1 root root 19 5月 8 20:31 /usr/lib64/libvirt.so.0 -> libvirt.so.0.1001.2 -rwxr-xr-x 1 root root 8100016 5月 8 19:51 /usr/lib64/libvirt.so.0.1001.2 everyone seems ok, but when I install perl-Sys-Virt-0.10.2-5.el6.x86_64.rpm with rpm -ivh, it occured error message: error: Failed dependencies: libvirt.so.0()(64bit) is needed by perl-Sys-Virt-0.10.2-5.el6.x86_64 libvirt.so.0(LIBVIRT_0.0.3)(64bit) is needed by perl-Sys-Virt-0.10.2-5.el6.x86_64 libvirt.so.0(LIBVIRT_0.0.5)(64bit) is needed by perl-Sys-Virt-0.10.2-5.el6.x86_64 libvirt.so.0(LIBVIRT_0.1.0)(64bit) is needed by perl-Sys-Virt-0.10.2-5.el6.x86_64 libvirt.so.0(LIBVIRT_0.1.1)(64bit) is needed by perl-Sys-Virt-0.10.2-5.el6.x86_64 libvirt.so.0(LIBVIRT_0.1.4)(64bit) is needed by perl-Sys-Virt-0.10.2-5.el6.x86_64 libvirt.so.0(LIBVIRT_0.1.5)(64bit) is needed by perl-Sys-Virt-0.10.2-5.el6.x86_64 libvirt.so.0(LIBVIRT_0.1.9)(64bit) is needed by perl-Sys-Virt-0.10.2-5.el6.x86_64 libvirt.so.0(LIBVIRT_0.10.0)(64bit) is needed by perl-Sys-Virt-0.10.2-5.el6.x86_64 libvirt.so.0(LIBVIRT_0.10.2)(64bit) is needed by perl-Sys-Virt-0.10.2-5.el6.x86_64 ... I checked with the follow command. [root@CH08134252 ~]# nm -A -D /usr/lib64/libvirt.so.0 | grep LIBVIRT /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.0.3 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.0.5 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.1.0 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.1.1 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.1.4 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.1.5 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.1.9 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.10.0 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.10.2 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.2.0 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.2.1 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.2.3 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.3.0 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.3.2 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.3.3 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.4.0 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.4.1 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.4.2 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.4.5 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.5.0 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.6.0 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.6.1 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.6.3 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.6.4 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.7.0 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.7.1 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.7.2 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.7.3 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.7.5 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.7.7 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.8.0 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.8.1 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.8.2 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.8.5 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.8.6 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.8.8 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.9.0 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.9.10 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.9.11 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.9.13 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.9.2 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.9.3 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.9.4 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.9.5 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.9.7 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.9.8 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_0.9.9 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_1.0.0 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_1.0.1 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_1.0.2 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_1.0.3 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_1.0.5 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_1.0.6 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_1.1.0 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_1.1.1 /usr/lib64/libvirt.so.0:0000000000000000 A LIBVIRT_PRIVATE_1.1.2 I have no idea, please give me some help. thanks. xuanmao_001

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[libvirt-users] Live Migration failure: this function is not supported by the connection driver: virDomainMigrateToURI2
by RockCui＠zhaoxin.com 08 May '15

08 May '15

Hi everyone, I’m testing the new openstack kilo on ubuntu15.04 and hypervisor is xen4.5. I can creat instance successfully , but live migration is always failed. Error report like this: 2015-05-07 10:47:22.135 1331 ERROR nova.virt.libvirt.driver [-] [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] Live Migration failure: this function is not supported by the connection driver: virDomainMigrateToURI2 2015-05-07 10:47:22.246 1331 WARNING nova.virt.libvirt.driver [-] [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] Error monitoring migration: this function is not supported by the connection driver: virDomainGetJobInfo 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] Traceback (most recent call last): 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 5689, in _live_migration 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] dom, finish_event) 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 5521, in _live_migration_monitor 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] info = host.DomainJobInfo.for_domain(dom) 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/host.py", line 164, in for_domain 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] return cls._get_job_stats_compat(dom) 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/host.py", line 113, in _get_job_stats_compat 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] info = dom.jobInfo() 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 183, in doit 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] result = proxy_call(self._autowrap, f, *args, **kwargs) 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 141, in proxy_call 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] rv = execute(f, *args, **kwargs) 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 122, in execute 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] six.reraise(c, e, tb) 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 80, in tworker 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] rv = meth(*args, **kwargs) 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] File "/usr/lib/python2.7/dist-packages/libvirt.py", line 1241, in jobInfo 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] if ret is None: raise libvirtError ('virDomainGetJobInfo() failed', dom=self) 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] libvirtError: this function is not supported by the connection driver: virDomainGetJobInfo 2015-05-07 10:47:22.246 1331 TRACE nova.virt.libvirt.driver [instance: b1081b86-fdce-4fcc-82c4-51896de4418c] If someone has a clue what may cause this, pls help. Thanks. 本邮件仅针对指定的收件人发送并可能含有保密或专有内容。任何非指定收件人所为之查阅、转发或使用本信息是不被允许的。如果您误收到本邮件，请立即告知发件人并删除本邮件及所有附件。谢谢！ The information transmitted in this e-mail is intended only for the addressee and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of this information by persons or entities other than the intended recipient is prohibited. If you received this e-mail in error, please notify the sender immediately, and delete this e-mail and any attachments. Thank you.

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[libvirt-users] Libvirt lvm pool and external snapshot
by Vasiliy Tolstov 07 May '15

07 May '15

Hello, does it possible to create external snapshot from lvm storage pool based VM? I want to create snapshot with disk only and doing volume download via libvirt api. How this possible? P.s. I know about lvm command for snapshot,but I need to use pure libvirt api.

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