November 2013 - 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] libvirt, lvm thin provisioning
by Michael Mol 04 Dec '13

04 Dec '13

I know that lvm supports thin provisioning, and I think I have a pretty good grasp on how that works. Does libvirt support lvm thin provisioning and thin snapshots? I know that in order to set up lvm thin provisioning by hand, I have to create a thin-provisioning pool within the volume group, and then thin-provisioned logical volumes and thin-provisioned snapshots can be created within that thin-provision pool. I also know that it's possible to have more than one thin-provisioning pool within the same volume group, which tells me that in order to properly set up any lvm-aware application to use thin-provisioning, I may need to inform it which thin-provisioning pool it should base LVs and snapshots from. When I look at the example here: http://libvirt.org/storage.html#StorageBackendLogical I don't see anything particular which tells me it supports building off a thin-provisioning pool if I specify such by name. Checking here: http://libvirt.org/formatstorage.html#StoragePool I again don't see anything specific about logical thick vs thin provisioning. I would expect to see *something*, as there are performance consequences when making such choices, so I'm again not sure libvirt recognizes a difference. So is this something that libvirt can do? And is there good documentation somewhere on the subject?

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[libvirt-users] FYI: Wiki account self-registration disabled
by Daniel P. Berrange 29 Nov '13

29 Nov '13

Unfortunately evil spammers have managed to defeat all the anti-spam measures we've tried with the wiki. So it is with regret that we have had to disable new wiki account self-registration. We do still welcome contributions from anyone interested in adding wiki content. We just ask that you send a mail to the main devel mailing list (libvir-list(a)redhat.com) to request an account be created for you by the wiki admin. Meanwhile we're hoping to migrate the wiki to new hosting service where we'll be able to deploy newer wiki software and thus hopefully better anti-spam measures. When this happens we'll look at re-enabling self-registration of accounts. 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] Socket getting closed automatically after destroying vm.
by cool dharma06 29 Nov '13

29 Nov '13

hi all, i am experimenting libvirt-1.1.4 with my xen-4.2.1. virsh working fine when creating the vm. but it getting crashed or closed after destroying vm. the output is as follows: virsh # create /opt/i-47FD0798/libvirt_sec.xml Domain Customer1_Db_domU created from /opt/i-47FD0798/libvirt_sec.xml virsh # list Id Name State ---------------------------------------------------- 1 Sample running virsh # destroy 5 error: Failed to destroy domain 5 error: End of file while reading data: Input/output error error: One or more references were leaked after disconnect from the hypervisor error: Failed to reconnect to the hypervisor virsh # version error: failed to connect to the hypervisor error: no valid connection error: Failed to connect socket to '/var/run/libvirt/libvirt-sock': Connection refused

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[libvirt-users] Fw:Migration errors
by Tony Gong 26 Nov '13

26 Nov '13

have found the cause..migration goes well -------- Forwarding messages -------- From: "Tony Gong" <gong790802715(a)163.com> Date: 2013-11-26 09:15:08 To: libvirt-users(a)redhat.com Subject: Migration errors hi everyone: when I exc command: virsh migrate --live --unsafe --persistent --undefinesource --verbose winxp32 qemu+ssh://192.168.20.149/system tcp://192.168.20.149:16000 or virsh migrate --live --unsafe --persistent --verbose winxp32 qemu+ssh://192.168.20.149/system tcp://192.168.20.149:16000 some errors output: 1.Migration: error: Domain not found: no domain with matching name 'VM-****' 2.Migration: error: Requested operation is not valid: domain 'VM-***' is not processing incoming migrtion 3.Migration: error: Unable to read from monitor: Connection reset by peer :i think it is that connection broken:modles restart,FW destroy the connection 4.Migration: error: operation failed: domain is no longer running 5.warning: virGetHostname:2265: getaddrinfo failed for 'nc02':Temporary failure in name resolution

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[libvirt-users] Migration errors
by Tony Gong 26 Nov '13

26 Nov '13

hi everyone: when I exc command: virsh migrate --live --unsafe --persistent --undefinesource --verbose winxp32 qemu+ssh://192.168.20.149/system tcp://192.168.20.149:16000 or virsh migrate --live --unsafe --persistent --verbose winxp32 qemu+ssh://192.168.20.149/system tcp://192.168.20.149:16000 some errors output: 1.Migration: error: Domain not found: no domain with matching name 'VM-****' 2.Migration: error: Requested operation is not valid: domain 'VM-***' is not processing incoming migrtion 3.Migration: error: Unable to read from monitor: Connection reset by peer :i think it is that connection broken:modles restart,FW destroy the connection 4.Migration: error: operation failed: domain is no longer running 5.warning: virGetHostname:2265: getaddrinfo failed for 'nc02':Temporary failure in name resolution

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[libvirt-users] Help required in simulating libvirt TLS server
by Arun Viswanath 26 Nov '13

26 Nov '13

Hi All, Will some one explain how is this tls libvirt server is implemented. For my testing purpose I need to implement the similar TLS server in Java or Python and this server is capable to receive all libvirt calls like getCapabilities, hostname etc and return response as I'm configured. Basically I need to simulate the libvirt TLS server. I tried creating many TLS server but none of the my TLS server implemenation is capable to do proper handshake with python libvirt client and do successful calls. Any ideas or help will be appreciable. Thanks In Advance, Arun V

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[libvirt-users] Hypervisor load much greater than that of the guest
by Damion Parry 25 Nov '13

25 Nov '13

Hello, I've got a situation where I have a couple of vm's running at 300+% cpu on the hypervisor: 9893 qemu 20 0 13.0g 8.2g 4256 S 328.0 4.3 59793:17 qemu-kvm Yet the load within the vm is in the regions of: 1.00, 1.02, 0.98 Everything is reporting OK on both the hypervisor & guest, guest is a qcow2 image on local storage. If anyone could point me in the right direction to start debugging this I'd be grateful. Hypervisor: CentOS release 6.4 (Final) 2.6.32-358.23.2.el6.x86_64 qemu-kvm-0.12.1.2-2.355.0.1.el6_4.9.x86_64 libvirt-0.10.2-18.el6_4.14.x86_64 Guest: CentOS release 6.4 (Final) 2.6.32-358.14.1.el6.x86_64 Thanks in advance, Damion. Fubra is a company limited by shares and registered in England and Wales with number 3967214 at Manor Coach House, Church Hill, Aldershot, Hampshire, GU12 4RQ. We are registered for VAT with number GB733667024, and as a data controller with number Z5193400. We are members of RIPE, Nominet, The Italian RA and registered with OfCom as a provider of electronic communications service.

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[libvirt-users] Help with Vrbr0
by Sherin A 25 Nov '13

25 Nov '13

Hello, I am not able to see vrbr0 in my box. Can some one help me with this ? . I am trying KVM+libvirt and planing to use Routed mode. I hope this virbr0 must be up for using this . I can give an strace too. OS : Debian , kernel 3.12.0 libvrit version : 0.9.8 ____________________________________________________________________ root@:~# ifconfig br0 Link encap:Ethernet HWaddr 4c:72:b9:32:32:86 inet addr:10.0.0.12 Bcast:10.0.0.255 Mask:255.255.255.0 inet6 addr: fe80::4e72:b9ff:fe32:3286/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:4523 errors:0 dropped:0 overruns:0 frame:0 TX packets:4068 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:2286336 (2.2 MB) TX bytes:411238 (411.2 KB) eth0 Link encap:Ethernet HWaddr 4c:72:b9:32:32:86 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:17044 errors:0 dropped:0 overruns:0 frame:0 TX packets:14253 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:12594945 (12.5 MB) TX bytes:1902456 (1.9 MB) Interrupt:20 Memory:f7c00000-f7c20000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:4 errors:0 dropped:0 overruns:0 frame:0 TX packets:4 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:240 (240.0 B) TX bytes:240 (240.0 B) ------------------------------------------------------------------- root@:~# virsh net-start default error: Failed to start network default error: failed to add iptables rule to enable masquerading root@:~# virsh net-list --all Name State Autostart ----------------------------------------- default inactive yes root@:~# virsh net-start default error: Failed to start network default error: failed to add iptables rule to enable masquerading root@:~# id uid=0(root) gid=0(root) groups=0(root) --------------- -- -------------------------------------- Sherin A

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[libvirt-users] Scientific Linux as guest. Can't install with virt-manager because key "tab" in use
by E Gerlach 23 Nov '13

23 Nov '13

Please help, I can't install Scientific Linux 6.3 with virt-manager because the key tab switches between kvm windows. I urgently need tab to go on in install process. see screenshot: http://aiai.de/foren/scientificLinux_tab.png Even in fullscreen mode tab changes to kvm window and not to button "continue" for installation process. please help, I want to install scientific linux as kvm guest. I'm running debian wheezy as host. thx Eckard

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