August 2011 - Users - libvirt List Archives

[libvirt-users] VNC ports
by Jeff 14 Aug '11

14 Aug '11

I am needing to explicitly assign VNC ports to my virtual guests so that I can connect to them externally via a VNC client, and not virt-viewer. Since I will have multiple KVM Hosts with access to the same shared storage (to facilitate migrations) I need to ensure I have unique VNC ports assigned to each guest so that I don't overlap somehow. I had planned to use a range of ports starting at 51000 for this purpose. While it works to assign port 51001, for example, to a guest and connect via my VNC client, when I run 'virsh vncdisplay guestname' it gives me back a different number that is specified in the XML file: #virsh vncdisplay win2k8guest :45101 #virsh dumpxml win2k8guest |grep vnc <graphics type='vnc' port='51001' autoport='no' /> Is there a logical reason for this that I'm not getting? I know when I have the port set to 5907, for example, it returns something expected: #virsh vncdisplay win2k8guest :7 But since I am likely going to need a good number of ports, I want to use a non-registered port range. Any insights?

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[libvirt-users] How do I disable auto-logout ....
by William A. Mahaffey III 14 Aug '11

14 Aug '11

.... I have a 64-bit CentOS 5.6 VM running on a 64-bit FC14 host. I notice that it has an automatic logout feature after a period of idleness, see below: [wam@centos-5, CFD, 5:52:45pm] 1183 % ll -tr LIST LIST.Update /usr/local/bin/P* /usr/local/bin/*WAM* ; ps -u wam -lf ; uname -a ; date ls: No match. F S UID PID PPID C PRI NI P SZ:RSS WCHAN STIME TTY TIME CMD 5 S wam 2270 2266 0 15 0 * 22540:1788 ? 15:48 ? 00:00:04 sshd: wam@pts/0 0 S wam 2271 2270 0 15 0 * 3144:2720 rt_sig 15:48 pts/0 00:00:00 -tcsh 0 R wam 18249 2271 0 15 0 0 2621:896 - 17:52 pts/0 00:00:00 ps -u wam -lf Linux centos-5.6-vm 2.6.18-238.el5 #1 SMP Thu Jan 13 15:51:15 EST 2011 x86_64 x86_64 x86_64 GNU/Linux Fri Aug 12 17:52:50 CDT 2011 [wam@centos-5, CFD, 5:52:50pm] 1184 % auto-logout Connection to 192.168.122.213 closed. [wam@Q6600, ~, 6:52:51pm] 1014 % [wam@Q6600, ~, 9:40:49pm] 1014 % [wam@Q6600, ~, 9:40:49pm] 1014 % ssh2 -l wam 192.168.122.213 Last login: Fri Aug 12 15:48:11 2011 from 192.168.122.1 [wam@centos-5, ~, 9:40:54pm] 1135 % I checked man pages on both host & VM, but came up blank. I have another box running CentOS 5.6 native & it doesn't do this, so I suspect it is something w/ the VM environment. How do I disable that :-) ? Thanks in advance. -- William A. Mahaffey III ---------------------------------------------------------------------- "The M1 Garand is without doubt the finest implement of war ever devised by man." -- Gen. George S. Patton Jr.

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[libvirt-users] Problems setting up a VM ....
by William A. Mahaffey III 13 Aug '11

13 Aug '11

.... New to this list & definitely new to virtualization :-/ .... I am trying to setup a 64-bit CentOS 5.6 VM on a 64-bit FC14 server host, all patched up as of a couple of weeks ago. uname -a on the host shows: [wam@Q6600, CFD, 9:24:23am] 540 % uname -a Linux Q6600 2.6.35.11-83.fc14.x86_64 #1 SMP Mon Feb 7 07:06:44 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux [wam@Q6600, CFD, 9:52:43am] 541 % I access the server by ssh on my LAN. I was working on this last Sunday & got stuck, see below. I posted this question to a couple of other lists & had no takers, so here I am here. The server runs in runlevel 3 & has no gfx card onboard, so I am working from the command line. I had a couple of abortive attempts at setup, which got as far as initializing my disk storage for the VM, then the following: [root@Q6600:/etc, Sun Aug 07, 05:08 PM] 1339 # virt-install -n CentOS-5.6-64bitVM -r 2048 --arch=x86_64 --cpu core2duo,disable=vmx --vcpus=1,maxvcpus=1,sockets=1,cores=2,threads=1 --os-type=linux --os-variant=rhel5 --disk path=/home/VMs/CentOS.5.6-64bit-VM/disk.img,size=50 --cdrom /home/ISOs/CentOS-5.6/64bit/CentOS-5.6-x86_64-bin-DVD-1of2.iso --autostart --prompt This will overwrite the existing path '/home/VMs/CentOS.5.6-64bit-VM/disk.img' Do you really want to use this disk (yes or no) yes Starting install... Creating domain... | 0 B 00:00 Gtk-Message: Failed to load module "pk-gtk-module": libpk-gtk-module.so: cannot open shared object file: No such file or directory Gtk-Message: Failed to load module "canberra-gtk-module": libcanberra-gtk-module.so: cannot open shared object file: No such file or directory (virt-viewer:20165): Pango-WARNING **: failed to choose a font, expect ugly output. engine-type='PangoRenderFc', script='latin' Domain installation still in progress. You can reconnect to the console to complete the installation process. [root@Q6600:/etc, Sun Aug 07, 05:14 PM] 1339 # virsh --connect qemu:///system Welcome to virsh, the virtualization interactive terminal. Type: 'help' for help with commands 'quit' to quit virsh # list Id Name State ---------------------------------- 11 CentOS-5.6-64bitVM running virsh # help The install began OK, right after the 'Pango-WARNING' message, in a separate window, quite readable, started booting & scrolling text past *FAST*, for about 15 sec., then hung, right after a line about 'serial port ....' (I couldn't click-&-drag to capture text from the VM window, going from memory). I let it sit for about 5 min. to be sure it was really hung, then clicked the VM window out, whereupon the message about 'installation still in progress' & the rest appeared. I poked around in virsh a bit as you can see, but couldn't figure anything out. I tried (re)connecting to the console of the VM & that hung, I had to kill the virsh command from another window. I attach syslog output from the proceedings. I am *sure* this is pilot error, but I am stuck for now. Any assistance appreciated :-) .... -- William A. Mahaffey III ---------------------------------------------------------------------- "The M1 Garand is without doubt the finest implement of war ever devised by man." -- Gen. George S. Patton Jr.

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[libvirt-users] virStoragePoolRefresh() returns before or after all new vols on path discovered?
by Gareth S Bestor 12 Aug '11

12 Aug '11

Basically, does virStoragePoolRefresh() api 'block' until the pool has refreshed itself (eg added any/all new volumes found in the pool path) or can it return early before the refresh is fully 'done' ? - G Dr. Gareth S. Bestor IBM Senior Software Engineer Systems & Technology Group - Systems Management Standards 971-285-6375 (mobile) bestor(a)us.ibm.com

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[libvirt-users] virInitialize dumps core intermittently.
by Sharad Mishra 12 Aug '11

12 Aug '11

Hi, I have a host with 6 VMs set to autostart. When this host reboots, it starts libvirtd, pegasus cimom and libvirt-cim. It also restarts the VMs. Intermittently we noticed a core during start up that points to the last call made by libvirt-cim to "virInitialize". I am thinking that it is a timing issue where virInitialize is called while libvirt is trying to autostart the VMs. Is this a known issue? Thanks, Sharad Mishra

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[libvirt-users] iscsi w/ libvirt
by Stefan G. Weichinger 11 Aug '11

11 Aug '11

"Playing" with a NAS capable of iscsi ... trying to make use of it within the virtual machine manager. Could someone point me at or provide me an example/screenshot of adding iscsi to my KVM-host? I think I still don't get it. Should I add an iscsi-LUN as a storage-pool? Or as single disk to a VM? Could someone pls point me at some docs to make me understand? Thanks a lot, Stefan

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[libvirt-users] the naming convention libvirt names a block based storage volume
by Yih-Herng Chuang 11 Aug '11

11 Aug '11

Seems like different libvirt versions generate a storage volume name in different format. We would like to learn how libvirt names a storage volume under a block based storage pool. So that we may properly extract the LUN identifier out of the volume name for now and in the future. On host A loaded with libvirt 0.8.7 # virsh vol-list SanPool1 Name Path ----------------------------------------- unit:0:0:11 /dev/disk/by-id/wwn-0x600a0b800013071a000035ec4e32b832 On host B loaded with libvirt 0.8.1 # virsh vol-list SanPool1 Name Path ----------------------------------------- 1.0.0.0 /dev/disk/by-id/wwn-0x60080e500017e1d40000d0b74d873b13 Regards, --Yih Yih-Herng Chuang IBM Center for Microsoft Technologies 3600 Carillon Point, Kirkland WA 98033 (DID) (425) 803-7285 (TIE) 977-7285 YihHerng(a)us.ibm.com

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[libvirt-users] virt-manager - how to add /dev/mapper as a storage pool
by Marc Haber 10 Aug '11

10 Aug '11

Hi, I would like to be able to configure VMs running off dm-crypt devices that were unlocked in the host. Unlocked dm-crypt devices show up in /dev/mapper/devicename, with devicename being the second parameter given to cryptsetup luksOpen. The LVM storage pool type insists on searching in /dev/vgname and cannot be tricked into reading /dev/mapper by giving it a fake VG named mapper; the LVM storage pool type "dir" mishandles /dev/mapper/control ("illegal seek"). Is there a workaround to be able to use such devices in virt-manager without having to define a single storage pool for every device used? Greetings Marc -- ----------------------------------------------------------------------------- Marc Haber | "I don't trust Computers. They | Mailadresse im Header Mannheim, Germany | lose things." Winona Ryder | Fon: *49 621 72739834 Nordisch by Nature | How to make an American Quilt | Fax: *49 3221 2323190

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[libvirt-users] XML file location
by Jeff 09 Aug '11

09 Aug '11

Can anyone tell me how to change the default directory which stores the guest XML files? I want to keep them with the guest image files on a shared NFS filesystem. Thanks, Jeff

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[libvirt-users] Create volume wit libvirt API for Python
by Anatoliy Guskov 07 Aug '11

07 Aug '11

Please help! How create volume with libvirt API for python? conn = libvirt.open(qemu:///system) vol = libvirt.virStoragePool(conn) conf_file = 'disk.xml' f = open(conf_file) xml = f.read() pool = "default" vol.createXML(pool,xml) xml file disk.xml: <volume> <name>name.img</name> <key>/var/lib/libvirt/images/name.img</key> <source> </source> <capacity>21474836480</capacity> <allocation>21474840576</allocation> <target> <path>/var/lib/libvirt/images/name.img</path> <format type='raw'/> </target> </volume> This script not work :-( Thanks for help!

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