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[libvirt-users] Ongoing VM saga ....
by William A. Mahaffey III 15 Aug '11

15 Aug '11

.... I have a 64-bit CentOS 5.6 VM running on a 64-bit FC-14 host. I was originally using the stock NAT networking on the guest, which could access the host, but nothing else on the network. I eventually found some links on how to setup routed networking on the guest using a specifically setup bridge. I followed the example a bit too closely, bridging my eth0 interface, which is the one I nornally use to access the host over my LAN. So eth0 temporarily ceased functioning & I had to undo my handiwork through the console on the host, which I virtually never use. I restarted networking manually a couple of time on the host, but eth0 was still fried. I then rebooted the host (still through the console) & that went AOK, took about 5 min. & all was well, eth0/SSH LAN access was back & I logged back in & tried to log into the VM to plot my next course of action & .... The VM address had moved. I had set it up to use static addressing (modified the ifcfg-eth0 on the VM & restarted networking, 2 or 3 times yesterday, installed compilers, etc. from the host, & all was well until I messed around w/ trying the roll-your-own bridge this A.M.). Which brings me to the real question: How do I figure out the IP address the VM is using so I can login & continue the festivities ? I found it yesterday through the VM (virt-viewer) console after setting up the VM the 1st time, but that doesn't work today either (black screen inside the viewer, no response to regular or ctrl-keys, etc.) :-/ .... 'virsh .... console' hangs virsh, etc. :-) .... Soooooo .... how do I recover that $&#&^$&#* IP address for the VM :-) ? TIA .... -- 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] How to setup routed networking in CLI ....
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 have the stock networking (NAT), but I need routed to be able to access other boxen on my LAN. I looked at the docs on the libvirtd website, but their example of how to setup routed networking is for the GUI, which doesn't work for me (text in buttons, etc. doesn't display, no gfx card on host). The man pages are pretty good, but lack pointers on the myriad options & their interaction for networking & are a bit short on examples. Any hints on doing that (setup routed networking under CLI) for me ? URL's, etc. ? TIA .... -- 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] VNC ports
by Jeff 13 Aug '11

13 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 13 Aug '11

13 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 12 Aug '11

12 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 10 Aug '11

10 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 09 Aug '11

09 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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