virt February 2009

virt@lists.centos.org

18 participants
14 discussions

kmod-kvm-2.6.18-92.1.18.el5-72-1.x86_64.rpm outdated, need on for 2.6.18-92.1.22.el5
by Michael Schenck 28 May '09

28 May '09

CentOS Virt, I'm looking for an RPM for the kmod-kvm processor specific modules (kvm-intel or kvm-amd). I've been using L. Farkas's repository, but after the recent kernel updates, I'm out of luck. Best Regards, Michael Schenck

4 7

centos 4.7 / kvm
by Michael Kress 24 Feb '09

24 Feb '09

Hello, I'm trying to install centos-4.7 under kvm (for legacy reasons). I can't get the beast installed, it crashes (see output below). I'm using: qemu 0.9.1 kvm-72 libvirt-0.4.6 kernel 2.6.26 What can I do in order to get the installation being done? The host is a x86_64 machine (debian5). BTW, the installation for centos-5.2 works like a charm with the above configuration. TIA Regards Michael RSP: 0000:000001007fa63eb8 EFLAGS: 00000246 RAX: 0000000000130079 RBX: 0000000000000186 RCX: 0000000000000186 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000003e8 RBP: 0000000000000014 R08: 000000017ffdf9c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000000000c1 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffffffff80573900(0000) knlGS:0000000000000000 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b CR2: 0000000000000000 CR3: 0000000000101000 CR4: 00000000000006e0 Process swapper (pid: 1, threadinfo 000001001fa12000, task 000001001fa11110) Stack: 0000000000000000 00000000000003e8 0000000000000000 ffffffff8011a874 0000000000000000 ffffffff8011ea9c 0000000000000186 ffffffff805824dd 0000000000000000 0000000000000800 Call Trace:<ffffffff8011a874>{lapic_watchdog_init+27} <ffffffff8011ea9c>{setup_apic_nmi_watchdog+47} <ffffffff805824dd>{setup_local_APIC+332} <ffffffff805828ff>{APIC_init_uniprocessor+144} <ffffffff8010c4fe>{init+214} <ffffffff8010c428>{init+0} <ffffffff80111693>{child_rip+8} <ffffffff8010c428>{init+0} <ffffffff8011168b>{child_rip+0} Code: 0f 30 e8 69 fe ff ff 48 c7 c6 05 1c 38 80 89 c2 44 89 e7 e8 RIP <ffffffff8011a543>{setup_p6_watchdog+28} RSP <000001001fa13eb8> <0>Kernel panic - not syncing: Oops -- Michael Kress, kress(a)hal.saar.de http://www.michael-kress.de / http://kress.net P E N G U I N S A R E C O O L

1 1

current state of kvm for centos-5
by Farkas Levente 15 Feb '09

15 Feb '09

hi, after a long time it seems the current packages which needed for kvm on centos-5 host seems to working (ie. worth to change). my repo: http://www.lfarkas.org/linux/packages/centos/5/SRPMS/ contains the current set of rpms what we use (about a week): ----------------------------- libvirt-0.6.0-1 python-virtinst-0.400.1-1 virt-manager-0.6.1-1 virt-top-1.0.1-7.el5 virt-viewer-0.0.3-3 qemu-img-0.9.1-12 kvm-83-1 kmod-kvm-83-1 etherboot-5.4.4-8 ----------------------------- you can download x86_64 binary rpms too. these are mostly the fedora src.rpms rebuild on el5 with small modifications. imho it'd be useful to add centos's extras repo too, since these are a huge step even for the current rhel-5.3's rpms and the current kvm-36 which is in extras. these are usable on centos-5.2, so can be added to it's extras repo, but there will be some patches in the coming centos-5.3's kernel-2.6.18-128.el5 (eg. virtio) which has some more benefit too. any comments? how are willing to add it to centos? yours. -- Levente "Si vis pacem para bellum!"

2 2

Re: [CentOS-virt] Centos 5.2, Xen and "/lib[64]/tls"
by Christopher G. Stach II 14 Feb '09

14 Feb '09

----- "Manuel Wolfshant" <wolfy(a)nobugconsulting.ro> wrote: > Dennis J. wrote: > > Hi, > > > > I'm setting up a few machines for virtualization using Xen on Centos > 5.2 > > x86_64. A lot of how-to's out there tell me to do something like "mv > > > /lib/tls /lib/tls.disabled" or similar actions or else Xen might not > work > > correctly. Is this something that is still relevant > No, it is not relevant since 2006 It may be relevant since it depends on the guest. It's not clear in the original post whether it's the host or the guest that's 5.2. In the worst case, the guests will just be a little slow. :) -- Christopher G. Stach II

2 2

Centos 5.2, Xen and "/lib[64]/tls"
by Dennis J. 13 Feb '09

13 Feb '09

Hi, I'm setting up a few machines for virtualization using Xen on Centos 5.2 x86_64. A lot of how-to's out there tell me to do something like "mv /lib/tls /lib/tls.disabled" or similar actions or else Xen might not work correctly. Is this something that is still relevant or does it only apply to older versions of Xen/Centos? If this is still necessary what is the best way to disable this permantently so that after an update the directory doesn't get created again? Regards, Dennis

2 1

Centos 5.2 Xen question?
by Leam Hall 11 Feb '09

11 Feb '09

Did this one ever get resolved? I'm having the same issue with a different card set. http://lists.centos.org/pipermail/centos-virt/2008-January/000192.html Leam

3 3

Re: [CentOS-virt] Alternate console method for Windows 2003 server
by Christopher G. Stach II 09 Feb '09

09 Feb '09

----- "James Roman" <james_roman(a)ssaihq.com> wrote: > I have a DomU running Windows 2003 server that occasionally blue > screens > (or at least I assume it does). Obviously, when it does, I lose the > ability to open a VNC console. Is there some method for sending the > windows console to another location that can be viewed if the system > dies? Just read the Windows event log and/or crash dump. -- Christopher G. Stach II

3 3

Alternate console method for Windows 2003 server
by James Roman 09 Feb '09

09 Feb '09

I have a DomU running Windows 2003 server that occasionally blue screens (or at least I assume it does). Obviously, when it does, I lose the ability to open a VNC console. Is there some method for sending the windows console to another location that can be viewed if the system dies? Centos 5.2 2.6.18-92.1.6.el5xen kernel -- James D. Roman Sr. Network Administrator Science Systems and Application, Inc. Phone: 301-867-2101

4 4

patched kernel addressing timekeeping issues under vmware
by Akemi Yagi 06 Feb '09

06 Feb '09

People at vmware have provided patches for RHEL 5 that aim to fix timekeeping issues in vmware guests. https://bugzilla.redhat.com/show_bug.cgi?id=463573 Description of problem (excerpt) : "In a virtual environment, timekeeping for RHEL 64 bit kernels can be problematic, since time is kept by counting timer interrupts for this kernel. The problem arises when the VM is descheduled for some portion of time. When the VM is rescheduled, the hypervisor needs to "catch up" delivering timer interrupts so that the kernel can determine the correct time. Until the VM is caught up, the kernel's time will be behind, causing short term divergence of the kernel's time with wallclock time. Additionally, under certain overcommitment conditions, it may not be possible for the hypervisor to fully catch up. In this case, the kernel time can fall behind over the long term. The solution is to change the kernel's timekeeping algorithm to keep time based on how much time has elapsed according to a time counter rather than by counting interrupts. This is similar to the timeofday algorithm used by clocksource enabled mainline kernels or the RHEL5 32bit kernel." They were hoping to get them into the RHEL 5.3 kernel but unfortunately this is not going to happen. It looks like the patches will be in the RHEL 5.4 kernel. Using the patches provided in the bugzilla, I have rebuilt the latest test kernel (-125) that is available from http://people.redhat.com/dzickus. You can download the patched kernel from: http://centos.toracat.org/kernel/centos5/vmware463573/ I have test-installed it on a couple of CentOS-5 x86_64 guests. Still too early to say anything about the clock issue, but so far so good. If you get a chance to give it a try, please share what you find. Thanks, Akemi (nick: toracat)

1 1

Re: [CentOS-virt] Mixed dom0/domU usage?
by Christopher G. Stach II 05 Feb '09

05 Feb '09

----- "Dennis J." <dennisml(a)conversis.de> wrote: > Hi, > I'm wondering about the impact of using both dom0 and domU's on a > server at > the same time. I'm worried about the performance impact of running a > Mysql > server in a domU and now I'm thinking about moving the Mysql part of a > LAMP > setup into dom0 and running a few Apache guests as domUs. Since the > Apaches > will serve mostly from an NFS share they won't have much impact on the > disk > i/o so the database should be able to utilize the local storage > without > much interference from the guests. The plan is to limit dom0 to let's > say > 4gb of ram and then use the rest of it for the VMs. > > Has anyone experinece with this kind of "mixed" setup > (physical/virtual). > Are there any known problems with this approach? Running processes in dom0 that aren't for running Xen is going to destroy your domU I/O performance. The backends are just processes. If you take time away from those processes for other things, performance will suffer. You should run some load tests and see if it suits your model, though. Running the MySQL process in dom0 isn't going to get you very much of a performance boost if your MySQL configuration is tuned properly, either. -- Christopher G. Stach II

4 7

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

virt February 2009