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1612 discussions

kernel-plus PXE virt-install with Xen?
by PJ Welsh 11 Oct '17

11 Oct '17

I'm trying to figure out how to replace the vmlinuz and initrd.img from CentOS 7.4 with "fixed" kernel-plus versions in order create CentOS 7.4 VM's. So far I'm stuck booting via 7.3 install, adding new kernel-plus and upgrading to 7.4. I've not found any complete Google answers and was looking for help making sure I choose the correct approach. I've tried to build an initrd.img from a kernel-plus booting system via "mkinitrd -f -v /boot/initrd.img $(uname -r)", but the file size is less than half the one from CentOS 7.4 (17MB -vs- 47MB). I'm not even sure I can just replace those files yet either. Any help going the correct path? Thanks PJ

2 3

"Error starting domain: Path '/usr/share/OVMF/OVMF_CODE.fd' is not accessible"
by Craig M 04 Oct '17

04 Oct '17

Recently upgraded my centOS 7 host, and was giving this error after trying to start the guest VM with virt-manager from my desktop: "Error starting domain: Path '/usr/share/OVMF/OVMF_CODE.fd' is not accessible, no such file or directory" I was told on irc that the OVMF package is now part the base centOS repos, so it replaced the installed OVMF package from the repo centos-release-qemnu-ev As a quick workaround to get the VM running again, i was able to do "yum downgrade OVMF" which did: Removed: OVMF.noarch 0:20170228-5.gitc325e41585e3.el7 Installed: OVMF.noarch 0:20150414-2.gitc9e5618.el7 i'm sending this email to ask is there another file i should be using instead of OVMF_Code.fd, for example was it replaced by something else that i should be using ? or is there an issue somewhere else.

1 0

Status of reverted Linux patch "tty: Fix ldisc crash on reopened tty", Linux 4.9 kernel frequent crashes
by Pasi Kärkkäinen 20 Sep '17

20 Sep '17

Hello everyone, Recently Nathan March reported on centos-virt list he's getting frequent Linux kernel crashes with Linux 4.9 LTS kernel because of the missing patch "tty: Fix ldisc crash on reopened tty". The patch was already merged upstream here: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… but then reverted here: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… Nathan confirmed if he applies the patch from 71472fa9c52b1da27663c275d416d8654b905f05 to his Linux 4.9 LTS kernel the bug/problem goes away, so the patch (or similar fix) is still needed, at least for 4.9 LTS kernel. Mikulas reported he's able to trigger the same crash on Linux 4.10: https://www.spinics.net/lists/kernel/msg2440637.html https://lists.gt.net/linux/kernel/2664604?search_string=ldisc%20reopened;#2… Michael Neuling reported he's able to trigger the bug on PowerPC: https://lkml.org/lkml/2017/3/10/1582 So now the question is.. is anyone currently working on getting this patch fixed and applied upstream? I think one of the problems earlier was being able to reliable reproduce the crash.. Nathan says he's able to reproduce it many times per week on his environment on x86_64. Thanks a lot, -- Pasi

4 7

Xen CentOS 7.3 server + CentOS 7.3 VM fails to boot after CR updates (applied to VM)!
by PJ Welsh 15 Sep '17

15 Sep '17

A recently created and fully functional CentOS 7.3 VM fails to boot after applying CR updates: ... ;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f CentOS Linux 7 (Core)1;-1f1;-1f ... [ 194.011062] dracut-initqueue[227]: Warning: dracut-initqueue timeout - starting timeout scripts [ 194.546622] dracut-initqueue[227]: Warning: dracut-initqueue timeout - starting timeout scripts [ 194.547515] dracut-initqueue[227]: Warning: Could not boot. [ 194.557324] dracut-initqueue[227]: Warning: /dev/disk/by-uuid/bbafa3a5-0a24-40d2-a362-03cb33d5d76b does not exist Starting Dracut Emergency Shell... Warning: /dev/disk/by-uuid/bbafa3a5-0a24-40d2-a362-03cb33d5d76b does not exist Generating "/run/initramfs/rdsosreport.txt" Entering emergency mode. Exit the shell to continue. Type "journalctl" to view system logs. You might want to save "/run/initramfs/rdsosreport.txt" to a USB stick or /boot after mounting them and attach it to a bug report. dracut:/# Server OS is CentOS 7.3 using Xen (no CR updates): rpm -qa xen\* xen-hypervisor-4.6.3-15.el7.x86_64 xen-4.6.3-15.el7.x86_64 xen-licenses-4.6.3-15.el7.x86_64 xen-libs-4.6.3-15.el7.x86_64 xen-runtime-4.6.3-15.el7.x86_64 uname -a Linux tsxen2.xx.com 4.9.39-29.el7.x86_64 #1 SMP Fri Jul 21 15:09:00 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux Sadly, the other issue is that the grub menu will not display for me to select another kernel to see if it is just a kernel issue. The dracut prompt does not show any /dev/disk folder either. Any info? Thanks PJWelsh

6 16

Xen-44 Package Updates for XSAs up to XSA-235
by Kevin Stange 14 Sep '17

14 Sep '17

Hi all, Sorry for running a bit behind on security patch releases for the Xen-44 branch. As of yesterday, package version 4.4.4-28 was released for testing, which includes all relevant XSA patches through XSA-235 here: https://buildlogs.centos.org/centos/6/virt/x86_64/xen-44/ Please test and provide feedback if possible so we can get this package moved to release fairly soon. Currently in the release repo is 4.4.4-27 as of last week, which contains all relevant patches through XSA-230. -- Kevin Stange Chief Technology Officer Steadfast | Managed Infrastructure, Datacenter and Cloud Services 800 S Wells, Suite 190 | Chicago, IL 60607 312.602.2689 X203 | Fax: 312.602.2688 kevin(a)steadfast.net | www.steadfast.net

1 0

Availability of official AWS Marketplace image for 1708
by Ian Gable 14 Sep '17

14 Sep '17

Hi All, Does anyone have a guess about when new official AWS Marketplace images will be available for 1708: https://aws.amazon.com/marketplace/pp/B00O7WM7QW Sorry to ask after only a day, but we are anxious to start testing AMI builds in our pipeline starting from the official image. Thanks, Ian Gable

1 0

New xen-4.6.6 rpms for CentOS-6 and CentOS-7
by Johnny Hughes 13 Sep '17

13 Sep '17

There are new xen-4.6.6 rpms for CentOS-6 and CentOS-7 in the testing repository on buildlogs.centos.org. Can we please get some testing of these RPMs and feedback to this list. Thanks, Johnny Hughes

4 5

change network settings of VM depending on logged in user(s)?
by hw 08 Sep '17

08 Sep '17

Hi, is there a way to disable internet access for a windoze 7 VM depending on which user(s) is/are logged in? It seems windoze 7 doesn´t really support this, especially when you want to disable internet access for the whole machine, so I´m wondering if there is a way to do this when the machine is a KVM-VM running on Centos. The whole VM should only have internet access when a particular user logs in, and preferably for only this particular user.

4 5

updating qemu-img-ev 2.6
by Johan Guldmyr 08 Sep '17

08 Sep '17

Hello! http://mirror.centos.org/centos/7/virt/x86_64/kvm-common Latest is now qemu-kvm-ev-2.6.0-28.el7.10.1.x86_64.rpm while http://ftp.redhat.com/redhat/linux/enterprise/7Server/en/RHEV/SRPMS/ has qemu-kvm-rhev-2.6.0-28.el7_3.12.src.rpm A few questions: A) Does kvm-common have RPM builds from RHEV's SRPMS? B) Is the plan to keep kvm-common up to date with RHEV? // Johan Guldmyr

3 3

Re: [CentOS-virt] Status of reverted Linux patch "tty: Fix ldisc crash on reopened tty", Linux 4.9 kernel frequent crashes
by Pasi Kärkkäinen 01 Sep '17

01 Sep '17

On Thu, Aug 31, 2017 at 03:22:05PM +1000, Michael Neuling wrote: > On Thu, 2017-08-31 at 06:36 +0200, Greg Kroah-Hartman wrote: > > On Wed, Aug 30, 2017 at 11:10:14PM +0300, Pasi Kärkkäinen wrote: > > > Hello everyone, > > > > > > Recently Nathan March reported on centos-virt list he's getting frequent > > > Linux kernel crashes with Linux 4.9 LTS kernel because of the missing patch > > > "tty: Fix ldisc crash on reopened tty". > > > > Crashes with "normal" operation, or crashes when running a fuzzer or > > other type of program? > > For me it crashed on boot. > Nathan said he's getting the crashes at runtime, randomly, but often. > > > > > The patch was already merged upstream here: > > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i > > > d=71472fa9c52b1da27663c275d416d8654b905f05 > > > > > > but then reverted here: > > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i > > > d=896d81fefe5d1919537db2c2150ab6384e4a6610 > > > > > > Nathan confirmed if he applies the patch from > > > 71472fa9c52b1da27663c275d416d8654b905f05 to his Linux 4.9 LTS kernel the > > > bug/problem goes away, so the patch (or similar fix) is still needed, at > > > least for 4.9 LTS kernel. > > > > > > > > > Mikulas reported he's able to trigger the same crash on Linux 4.10: > > > https://www.spinics.net/lists/kernel/msg2440637.html > > > https://lists.gt.net/linux/kernel/2664604?search_string=ldisc%20reopened;#26 > > > 64604 > > > > > > Michael Neuling reported he's able to trigger the bug on PowerPC: > > > https://lkml.org/lkml/2017/3/10/1582 > > > > > > > > > So now the question is.. is anyone currently working on getting this patch > > > fixed and applied upstream? I think one of the problems earlier was being > > > able to reliable reproduce the crash.. Nathan says he's able to reproduce it > > > many times per week on his environment on x86_64. > > > > I don't know of anyone working on it, want to do it yourself? > > I'm not anymore. We found it was only triggered on a bogus CONFIG option > combination. Once we removed that, it no longer happened. > > The underlying bug was still there though. > Yep.. and the bug seems to trigger at runtime. > Mikey -- Pasi

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