Steven Ellis
2010-Oct-28 00:56 UTC
[CentOS-virt] Xen on Centos 5.5 vs 5.3 and stability issues
I've recently upgraded a Centos 5.3 machine to Centos 5.5. The hardware isn't HVM capabile so I'm only running para-virt guests. Using a vanilla i386 kernel boots without, but the newer kernel-xen locks up the Dom0 after a couple of minute. I'm only booting into single user mode for these tests so no VMs are active. *kernel-xen-2.6.18-128.1.10.el5 - no issues *kernel-xen-2.6.18-194.17.4.el5 - lock up *kernel-2.6.18-194.17.4.el5 - no issues For the moment I've switched back to the older Xen kernel, athough I'm still running the newer Xen Hypervisor. My current Xen packages are *xen-3.0.3-105.el5_5.5 *kernel-xen-2.6.18-194.17.4.el5 *kernel-xen-2.6.18-128.1.10.el5 *kmod-xfs-xen-0.4-2 *xen-libs-3.0.3-105.el5_5.5 *kernel-xen-devel-2.6.18-194.17.4.el5 *kernel-xen-devel-2.6.18-128.1.10.el5 *xen-devel-3.0.3-105.el5_5.5 Prior to the upgrade I had the following installed under Centos 5.3 *kernel-xen-devel-2.6.18-128.1.6.el5 *kernel-xen-2.6.18-128.1.10.el5 *xen-libs-3.0.3-80.el5_3.2 *xen-devel-3.0.3-80.el5_3.2 *kmod-xfs-xen-0.4-2 *kernel-xen-2.6.18-128.1.6.el5 *kernel-xen-devel-2.6.18-128.1.10.el5 *xen-3.0.3-80.el5_3.2 Booting Dom0 with kernel-xen-2.6.18-128.1.10.el5 everything appears to work normally and all of my Guests are up and running. If I boot with kernel-xen-2.6.18-194.17.4.el5 the boot normally gets to around udev and the system locks up. On a couple of occasions it did mange to boot but reported some files were corrupted. I'm worried that there is an issue running this kernel where the root file system is LVM on top of Raid 1. Anyone on this list have tips on diagnosing the issue, or come across a similar problem themselves. Steve -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20101028/1f23dad7/attachment-0005.html>
Eric Searcy
2010-Oct-28 02:26 UTC
[CentOS-virt] Xen on Centos 5.5 vs 5.3 and stability issues
Curious, RAID1 is soft/md, fakeraid or hardware? Also, are you using pygrub and then what is the kernel for the guests, or are you using a kernel from the host/which one? (I'm using almost-latest, ie last week, kernel on host and guest (pygrub) on hardware raid, haven't had any issues to date.) Eric Sent from my iPhone. Pardon the top-posting! On Oct 27, 2010, at 5:56 PM, Steven Ellis <mail_lists at stevencherie.net> wrote:> I've recently upgraded a Centos 5.3 machine to Centos 5.5. The hardware isn't HVM capabile so I'm only running para-virt guests. > > Using a vanilla i386 kernel boots without, but the newer kernel-xen locks up the Dom0 after a couple of minute. I'm only booting into single user mode for these tests so no VMs are active. > > kernel-xen-2.6.18-128.1.10.el5 - no issues > kernel-xen-2.6.18-194.17.4.el5 - lock up > kernel-2.6.18-194.17.4.el5 - no issues > > For the moment I've switched back to the older Xen kernel, athough I'm still running the newer Xen Hypervisor. > My current Xen packages are > > xen-3.0.3-105.el5_5.5 > kernel-xen-2.6.18-194.17.4.el5 > kernel-xen-2.6.18-128.1.10.el5 > kmod-xfs-xen-0.4-2 > xen-libs-3.0.3-105.el5_5.5 > kernel-xen-devel-2.6.18-194.17.4.el5 > kernel-xen-devel-2.6.18-128.1.10.el5 > xen-devel-3.0.3-105.el5_5.5 > Prior to the upgrade I had the following installed under Centos 5.3 > > kernel-xen-devel-2.6.18-128.1.6.el5 > kernel-xen-2.6.18-128.1.10.el5 > xen-libs-3.0.3-80.el5_3.2 > xen-devel-3.0.3-80.el5_3.2 > kmod-xfs-xen-0.4-2 > kernel-xen-2.6.18-128.1.6.el5 > kernel-xen-devel-2.6.18-128.1.10.el5 > xen-3.0.3-80.el5_3.2 > Booting Dom0 with kernel-xen-2.6.18-128.1.10.el5 everything appears to work normally and all of my Guests are up and running. > > If I boot with kernel-xen-2.6.18-194.17.4.el5 the boot normally gets to around udev and the system locks up. On a couple of occasions it did mange to boot but reported some files were corrupted. I'm worried that there is an issue running this kernel where the root file system is LVM on top of Raid 1. > > Anyone on this list have tips on diagnosing the issue, or come across a similar problem themselves. > > Steve > > > > > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > http://lists.centos.org/mailman/listinfo/centos-virt-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20101027/21a41f48/attachment-0005.html>
Pasi Kärkkäinen
2010-Oct-28 14:37 UTC
[CentOS-virt] Xen on Centos 5.5 vs 5.3 and stability issues
On Thu, Oct 28, 2010 at 01:56:33PM +1300, Steven Ellis wrote:> I've recently upgraded a Centos 5.3 machine to Centos 5.5. The hardware > isn't HVM capabile so I'm only running para-virt guests. > > Using a vanilla i386 kernel boots without, but the newer kernel-xen locks > up the Dom0 after a couple of minute. I'm only booting into single user > mode for these tests so no VMs are active. > > * kernel-xen-2.6.18-128.1.10.el5 - no issues > * kernel-xen-2.6.18-194.17.4.el5 - lock up > * kernel-2.6.18-194.17.4.el5 - no issues > > For the moment I've switched back to the older Xen kernel, athough I'm > still running the newer Xen Hypervisor. >Please set up a serial console and capture the full error/crash messages and post the log here. Examples here: http://wiki.xensource.com/xenwiki/XenSerialConsole -- Pasi> My current Xen packages are > > * xen-3.0.3-105.el5_5.5 > * kernel-xen-2.6.18-194.17.4.el5 > * kernel-xen-2.6.18-128.1.10.el5 > * kmod-xfs-xen-0.4-2 > * xen-libs-3.0.3-105.el5_5.5 > * kernel-xen-devel-2.6.18-194.17.4.el5 > * kernel-xen-devel-2.6.18-128.1.10.el5 > * xen-devel-3.0.3-105.el5_5.5 > > Prior to the upgrade I had the following installed under Centos 5.3 > > * kernel-xen-devel-2.6.18-128.1.6.el5 > * kernel-xen-2.6.18-128.1.10.el5 > * xen-libs-3.0.3-80.el5_3.2 > * xen-devel-3.0.3-80.el5_3.2 > * kmod-xfs-xen-0.4-2 > * kernel-xen-2.6.18-128.1.6.el5 > * kernel-xen-devel-2.6.18-128.1.10.el5 > * xen-3.0.3-80.el5_3.2 > > Booting Dom0 with kernel-xen-2.6.18-128.1.10.el5 everything appears to > work normally and all of my Guests are up and running. > > If I boot with kernel-xen-2.6.18-194.17.4.el5 the boot normally gets to > around udev and the system locks up. On a couple of occasions it did mange > to boot but reported some files were corrupted. I'm worried that there is > an issue running this kernel where the root file system is LVM on top of > Raid 1. > > Anyone on this list have tips on diagnosing the issue, or come across a > similar problem themselves. > > Steve > > > >> _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > http://lists.centos.org/mailman/listinfo/centos-virt
Steven Ellis
2010-Nov-01 01:07 UTC
[CentOS-virt] Xen on Centos 5.5 vs 5.3 and stability issues
Had a try at the weekend but I didn't have a female adapter handy to bring up the serial console. I did manage to try out some Centos 5.4 kernels, all of which worked in the Dom0 environment. I'm now running * 2.6.18-164.15.1.el5xen Also I upgraded a Centos 5.3 DomU to 5.5 with no issues, and it is running the most recent Centos 5.5 Xen kernel. What is really odd is that the freeze or kernel panic with a 5.5 kernel can vary. On one occasional I got as far as the single user prompt before the machine locked up, but usually it dies as udev start. I'll try and grab a cable/adapter to try again, but it will be a couple of days before I can bring the server down again. Steve On Thu, 28 Oct 2010 17:37:17 +0300, Pasi K?rkk?inen <pasik at iki.fi> wrote:> On Thu, Oct 28, 2010 at 01:56:33PM +1300, Steven Ellis wrote: >> I've recently upgraded a Centos 5.3 machine to Centos 5.5. The > hardware >> isn't HVM capabile so I'm only running para-virt guests. >> >> Using a vanilla i386 kernel boots without, but the newer kernel-xen > locks >> up the Dom0 after a couple of minute. I'm only booting into single > user >> mode for these tests so no VMs are active. >> >> * kernel-xen-2.6.18-128.1.10.el5 - no issues >> * kernel-xen-2.6.18-194.17.4.el5 - lock up >> * kernel-2.6.18-194.17.4.el5 - no issues >> >> For the moment I've switched back to the older Xen kernel, athough > I'm >> still running the newer Xen Hypervisor. >> > > Please set up a serial console and capture the full error/crash messages > and post the log here. > > Examples here: > http://wiki.xensource.com/xenwiki/XenSerialConsole > > -- Pasi > >> My current Xen packages are >> >> * xen-3.0.3-105.el5_5.5 >> * kernel-xen-2.6.18-194.17.4.el5 >> * kernel-xen-2.6.18-128.1.10.el5 >> * kmod-xfs-xen-0.4-2 >> * xen-libs-3.0.3-105.el5_5.5 >> * kernel-xen-devel-2.6.18-194.17.4.el5 >> * kernel-xen-devel-2.6.18-128.1.10.el5 >> * xen-devel-3.0.3-105.el5_5.5 >> >> Prior to the upgrade I had the following installed under Centos 5.3 >> >> * kernel-xen-devel-2.6.18-128.1.6.el5 >> * kernel-xen-2.6.18-128.1.10.el5 >> * xen-libs-3.0.3-80.el5_3.2 >> * xen-devel-3.0.3-80.el5_3.2 >> * kmod-xfs-xen-0.4-2 >> * kernel-xen-2.6.18-128.1.6.el5 >> * kernel-xen-devel-2.6.18-128.1.10.el5 >> * xen-3.0.3-80.el5_3.2 >> >> Booting Dom0 with kernel-xen-2.6.18-128.1.10.el5 everything appears > to >> work normally and all of my Guests are up and running. >> >> If I boot with kernel-xen-2.6.18-194.17.4.el5 the boot normally gets > to >> around udev and the system locks up. On a couple of occasions it did > mange >> to boot but reported some files were corrupted. I'm worried that > there is >> an issue running this kernel where the root file system is LVM on top > of >> Raid 1. >> >> Anyone on this list have tips on diagnosing the issue, or come across > a >> similar problem themselves. >> >> Steve >> >> >> >> > >> _______________________________________________ >> CentOS-virt mailing list >> CentOS-virt at centos.org >> http://lists.centos.org/mailman/listinfo/centos-virt > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > http://lists.centos.org/mailman/listinfo/centos-virt