virt January 2010

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26 participants
14 discussions

Fedora 12 2.6.31.5-127.fc12 domU on CentOS 5.4 2.6.18-164.6.1.el5xen fails to boot
by Charles J Gruener 06 Mar '10

06 Mar '10

Doing a kickstart install of Fedora 12 results in a non-bootable image. >From a virt-maanger instance, the error produced when trying to run the domU is: Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/engine.py", line 498, in run_domain vm.startup() File "/usr/share/virt-manager/virtManager/domain.py", line 573, in startup self.vm.create() File "/usr/lib64/python2.4/site-packages/libvirt.py", line 287, in create if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self) libvirtError: POST operation failed: xend_post: error from xen daemon: (xend.err "Error creating domain: Boot loader didn't return any data!") If you drop to the command line to see what pygrub gets back, you get: # pygrub /var/lib/xen/images/fedora12.img Traceback (most recent call last): File "/usr/bin/pygrub", line 677, in ? fs = fsimage.open(file, get_fs_offset(file)) IOError: [Errno 95] Operation not supported The kickstart worked perfectly in Fedora 11 on a CentOS 5.4 dom0. I've tried investigating all sorts of grub options and even tried copying kernel and initramfs files out from the domU to dom0 and booting from those with no luck. The only thing that does work is if I install Fedora 11 and then perform an upgrade to Fedora 12. I really don't want to have to deploy machines this way. Is anyone else experiencing this issue? I can provide any further information requested. Basically, to repeat my error, install CentOS 5.4 with Virtualization, then try to install a Fedora 12 domU. The installation finishes without error but you can't boot. The systems are all x86_64. Thanks. Charles

9 31

Fedora 12 domU will not boot kernel
by Tait Clarridge 21 Feb '10

21 Feb '10

Hello Everyone, I have been trying to get a Fedora 12 domU to boot for the better part of the afternoon and haven't had success booting any F12 kernel in Xen. I can get Fedora 11 installed no problem, tried to do a preupgrade but the when booting the preupgrade kernel through grub (or even from outside the domU) the domU reboots very quickly and ultimately crashes. As far as I saw in the qemu-dm-xxx.log, xend.log, and xend-debug.log there are no messages informing me of what went wrong. I am using CentOS 5.3 with the 2.6.18-92.1.22.el5xen kernel. I am unable to update the kernel at this time as new drivers cause major disk controller issues. If it as simple as a kernel update I will try again, but as of right now I am stumped so I asking for a little help! Has anyone successfully gotten F12 set as a domU using the regular CentOS xen and kernel-xen packages? xen-3.0.3-80.el5_3.3 kernel-xen-2.6.18-92.1.22.el5 Best, Tait

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Windows Xen VM's have high guest CPU usage and poor performance
by Ryan Pugatch 26 Jan '10

26 Jan '10

Hello all, I have a PowerEdge 2950 that I am using to host Windows XP VM's under CentOS. I am experiencing poor performance in the Xen VM's. Any time I try to do something, the CPU usage (as reported by the Windows task manager) hits 100% for a few and then drops back down. This is causing the VM's to run sluggish and be quite annoying to use. Example.. I click IE.. cpu hits 100% and IE takes a bit to open. I go to a website.. 100%.. I click a link.. 100%. This is the case even if I only have one VM running. I now have 32 VM's running on the machine and dom0's cpu usage as reported by xm top is 622%. It seems like Xen is just performing poorly while handling these Windows VMs. Any suggestions? I have Windows VM's on other hardware (typically PowerEdge R905s and R710s and they seem ok). This 2950 is a decent machine.. 32G RAM, 2x Xeon E5405 (quad core) at 2ghz. And I'm only allocating 1 CPU and 768MB RAM for each VM. Sample config: name = "win01n" maxmem = 768 memory = 768 vcpus = 1 builder = "hvm" kernel = "/usr/lib/xen/boot/hvmloader" boot = "c" pae = 1 acpi = 1 apic = 0 localtime = 1 on_poweroff = "destroy" on_reboot = "restart" on_crash = "restart" device_model = "/usr/lib64/xen/bin/qemu-dm" usbdevice = "tablet" sdl = 0 vnc = 1 vncunused = 0 vncdisplay = "1" disk = [ 'file:/var/xen/running/win01n,ioemu:hda,w' ] vif = [ "bridge=xenbr0" ] serial = "pty" Thanks in advance for any insight! - Ryan

7 22

How to debug Ubuntu 8.04 LTS guest crash during install?
by Neil Aggarwal 24 Jan '10

24 Jan '10

Hello: I am using kvm on a CentOS 5.4 server. I am trying to install the TunkeyLinux Core appliance found here: http://www.turnkeylinux.org/core I downloaded the ISO file from the web site. Then, I used this command to intall it: virt-install -n tkl-core -r 512 --vcpus=1 --check-cpu --os-type=linux --os-variant=ubuntuhardy -v --accelerate -c /tmp/turnkey-core-2009.10-hardy-x86.iso -f /var/lib/libvirt/images/tkl-core.img -s 15 -b br0 --vnc noautoconsole When I connect to the VNC console, I get the Turnkey linux options screen. I select Install to hard disk from there and it seems to start the install but crashes during the installer startup. This is repeatable so there has to be a way to debug it. I tried turning on the debug option for virt-install but that did not give me any useful info. Any ideas how to debug this? Thanks, Neil -- Neil Aggarwal, (281)846-8957, http://UnmeteredVPS.net/cpanel cPanel/WHM preinstalled on a virtual server for only $40/month! No overage charges, 7 day free trial, PayPal, Google Checkout

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Recent version of open-vm-tools SRPM??
by David Knierim 22 Jan '10

22 Jan '10

I want to create some rpms to install the open-vm-tools on my CentOS 5.4 servers. I have not been able to find any srpms that are of recent vintage (The most recent I have found uses the version of open-vm-tools released in Dec. 2008). Before I spend a lot of time building a new srpm, I thought I would ask if anyone has already done this... Thanks, David

2 1

VirtIO with CentOS 5.4
by Bill McGonigle 22 Jan '10

22 Jan '10

Hi, all, I'm attempting to run a Windows 2003 (32-bit) VM under CentOS 5.4, generally following: http://wiki.centos.org/HowTos/KVM I've seen nice performance benefits with the VirtIO driver under Fedora, so I'd like to get that running with CentOS as well. I have the September drivers build .iso. According to: http://www.linux-kvm.org/page/Virtio I need a KVM version 60 or later - fair enough. Back at the wiki there's a note about later KVM in -testing, and sure enough there's a -66 there, but it's only built for an old kernel. I got that SRPM and tried to build it against the current kernel, but get kmod build errors, ala: /root/rpmbuild/BUILD/kvm-kmod-66/_kmod_build_/kernel/external-module-compat.h:421: error: redefinition of typedef 'bool' ... /root/rpmbuild/BUILD/kvm-kmod-66/_kmod_build_/kernel/external-module-compat.h:734:1: warning: "__aligned" redefined The wiki also has a note about -84 being in Levente Farkas's repo, but those don't appear to be there any longer. So, questions: 1) what are folks generally using for VirtIO-capable KVM on CentOS 5.4? 2) given that the upstream has Windows drivers available, I'm curios how they're handling the issue, and if we're in sync. 3) does anybody have the SRPM that was at Farkas's repo or know if it went elsewhere? I assume the build issues have been solved there already. I'd be happy to update the Wiki with info from responses here. Thanks, -Bill -- Bill McGonigle, Owner BFC Computing, LLC http://bfccomputing.com/ Telephone: +1.603.448.4440 Email, IM, VOIP: bill(a)bfccomputing.com VCard: http://bfccomputing.com/vcard/bill.vcf Social networks: bill_mcgonigle/bill.mcgonigle

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boot order with Xen domxml
by Mr. X 19 Jan '10

19 Jan '10

Hey Virtualeers, When using domxml to configure a Xen domain, where is the meta spec for boot order? Before domxml, using xen-xm, this was easy: boot = 'dca' ; 1-CD | 2-HD | 3-floppy When I try adding this below with Virsh (vi), it is erased in Xen domains <boot dev='hd'> In KVM domains it is accepted. -- Mark

2 1

Xen Database vms
by Ben M. 15 Jan '10

15 Jan '10

Are "centralized" database (SQL) servers best left out of virtualization and committed to their own hardware like the "old days" or are there some guidelines one should consider in setting them up? I'm not talking mega-large recordsets, but large enough to handle multiple years of CRMs and intensive querying, Accounting Systems and so forth. Fundamental website CMS database is a no-sweat issue. This would be on plain vanilla CentOS/Xen stock. All usual SQL server flavors considered. I'm trying to get an idea of where I am ultimately heading in my LANs.

6 9

KVM management tools.....
by Tom Bishop 12 Jan '10

12 Jan '10

Looking at what my best options for managing KVM via a gui. Running Centos 5.4 and have several machines and want to migrate off of vmware server 2.x. So far it appears that the management tools haven't quite cought up to Vmware but are gaining and closing. I have been looking at convirt, and others. I like what I see in Ovirt but I'm not sure it is available for centos 5.4, or is it? Is there anyone running ovirt in centos? Also, what are folks using for their management tools for KVM, Thanks.....

2 1

Help with the bugtracker
by Karanbir Singh 12 Jan '10

12 Jan '10

Hi Guys, There are a fair few issues reported at bugs.centos.org around virt issues, Xen / KVM and even VMware stuff. And I know there is a lot of knowledge and talent around those areas here on this list. Just wondering if some of the people here might be able to help with those issues on bugs.c.o - it should not be more than a few hours / week in terms of commitment. Thanks for considering. -- Karanbir Singh London, UK | http://www.karan.org/ | twitter.com/kbsingh ICQ: 2522219 | Yahoo IM: z00dax | Gtalk: z00dax GnuPG Key : http://www.karan.org/publickey.asc

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virt January 2010