April 2016 - virt - lists.centos.org

How to debug Ubuntu 8.04 LTS guest crash during install?
by Neil Aggarwal 04 Nov '25

04 Nov '25

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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Xen4CentOS 6 64bit - domUs don't shutdown on dom0 after "yum upgrade" to 4.6.1
by exvito here 25 May '16

25 May '16

Hello all, I'm addressing the mailing list following the suggestion of gwd on #centos-virt @freenode IRC. The subject says most of it. Here are the details : - Was running 4.4.x and configured such that /etc/xen/auto domUs would be saved/restored on dom0 shutdown/bootup. - Installation was based on "centos-release-xen" such that "yum upgrade" brough Xen to 4.6.1. After upgrade observed behavior: - dom0 boot starts up the domUs in /etc/xen/auto. - dom0 shutdown does not save/shutdown domUs (the command is "shutdown -h now" via ssh). Diagnostics: - Running /etc/init.d/xendomains stop/start does the right thing. - chkconfig --list shows "xendomains 0:off 1:off 2:on 3:on 4:on 5:on 6:off" which looks nice. - The rc link is in place: /etc/rc.d/rc0.d/K00xendomains -> ../init.d/xendomains - Edited /etc/init.d/xendomains such that the lines: start) $LIBEXEC_BIN/xendomains start ;; stop) $LIBEXEC_BIN/xendomains stop ;; become (added "2>&1 | tee FILE" to the underlying start/stop command) start) $LIBEXEC_BIN/xendomains start 2>&1 | /usr/bin/tee -a /tmp/xd-start.log ;; stop) $LIBEXEC_BIN/xendomains stop 2>&1 | /usr/bin/tee -a /tmp/xd-stop.log ;; - The /tmp/xd-stop.log file is not created on dom0 shutdown (make sense, but why?!). - The /tmp/xd-stop.log is created on dom0 boot, as expected. - Both files are created on manual /etc/init.d/xendomains start/stop - Manually added an rc link: /etc/rc.d/rc0.d/K01xendomains -> ../init.d/xendomains - The behavior remains unchanged. This is looking much more of an upstart/sysvinit issue that a Xen 4.6 issue. However, I believe others may have been through this experience. Can anyone provide any pointers in further diagnosing this? Thanks in advance. Regards, -- exvito

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version(qemu-kvm) with parallel port support
by Subscriber 26 Apr '16

26 Apr '16

Whether there is a version of the qemu-kvm with support for parallel port (passthrough). I need parallel port for Windows VM (security dongle LPT). I use on one host # /usr/libexec/qemu-kvm -version QEMU emulator version 2.3.0 (qemu-kvm-ev-2.3.0-31.el7_2.10.1) another host /usr/libexec/qemu-kvm -version QEMU emulator version 1.5.3 (qemu-kvm-1.5.3-105.el7_2.3) Both versions do not support parallel port and generate error: qemu-kvm: -device isa-parallel,chardev=char parallel 0,id=parallel 0: 'isa-parallel' is not a valid device model name

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Re: [CentOS-virt] oVirt 3.6.5 packages available for testing
by Jack Greene 24 Apr '16

24 Apr '16

Thanks for the good news Rafael. There are some bug fixes in it. Would you mind posting the repo/yum instructions for this package? Thanks Jack -------- Original message -------- From: Rafael Martins <rmartins(a)redhat.com> Date: 04/22/2016 6:33 AM (GMT-08:00) To: centos-virt(a)centos.org Subject: [CentOS-virt] oVirt 3.6.5 packages available for testing Hi, We have just finished building packages for oVirt 3.6.5 release in Virt SIG. They are tagged virt7-ovirt-36-testing. Please help us testing this release and submitting feedback! Thanks, Rafael Martins _______________________________________________ CentOS-virt mailing list CentOS-virt(a)centos.org https://lists.centos.org/mailman/listinfo/centos-virt

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New Packages in Testing for CentOS-7-Xen-46, CentOS-6-Xen-46, CentOS-6-Xen-44
by Johnny Hughes 22 Apr '16

22 Apr '16

On 04/18/2016 02:19 PM, Johnny Hughes wrote: > New Packages in Testing for CentOS-7-Xen-46, CentOS-6-Xen-46, > CentOS-6-Xen-44. > > CentOS-7-Xen46: > - kernel-3.18.30-20.el7.src.rpm : XSA-174, upstream changelogs: > https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.26 > https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.27 > https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.28 > https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.29 > https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.30 > > - xen-4.6.1-6.el7.src.rpm : XSA-173 > > ===================================================================== > > CentOS-6-Xen-46: > - kernel-3.18.30-20.el6.src.rpm : XSA-174, upstream changelogs: > https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.26 > https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.27 > https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.28 > https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.29 > https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.30 > > - xen-4.6.1-6.el7.src.rpm : XSA-173 > > ===================================================================== > > CentOS-6-Xen-44: > - kernel-3.18.30-20.el6.src.rpm : XSA-174, upstream changelogs: > https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.26 > https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.27 > https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.28 > https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.29 > https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.30 > > - xen-4.4.4-3.el7.src.rpm : XSA-173 > > - libvirt-1.3.0-0.1.el6.src.rpm : Move to the same major libvirt > version as CentOS-6-Xen-46 > > - libvirt-python-1.3.0-1.el6.src.rpm : Move to the same major > libvirt-python version as CentOS-6-Xen-46 > > ===================================================================== > > To test the above packages, enable your testing repo in > /etc/yum.repo.d/CentOS-Xen-*.repo, then do: > > yum clean all > yum update > > Please provide feedback to this list for working with no issue, or > issues found. > > Thanks, > Johnny Hughes >

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oVirt 3.6.5 packages available for testing
by Rafael Martins 22 Apr '16

22 Apr '16

Hi, We have just finished building packages for oVirt 3.6.5 release in Virt SIG. They are tagged virt7-ovirt-36-testing. Please help us testing this release and submitting feedback! Thanks, Rafael Martins

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Re: [CentOS-virt] migrating from xend to libxl after xen
by rgritzo 19 Apr '16

19 Apr '16

> On Sat, Apr 16, 2016 at 5:40 PM, rgritzo <rgritzo at gmail.com <https://lists.centos.org/mailman/listinfo/centos-virt>> wrote: > > so i guess i was not paying too close attention and upgraded to xen 4.6.1 before i migrated my domU configurations to libxl :{ > > Just FYI, as a fall-back you can always move yourself to the Xen 4.4 "track" by: > 1. Installing centos-release-xen-44 > 2. Removing centos-release-xen > 3. "yum downgrade" all the Xen packages. > > This will switch you to repos which will only have Xen 4.4; and Johnny > will be doing XSA backports until the 4.4 EOL in 2017. You can > upgrade to 4.6 again by either re-installing centos-release-xen (which > will update to the latest automatically) or installing > centos-release-xen-46 (which will stay on Xen 4.6). (You can install > multiple packages at the same time; yum will just choose the highest > version available.) ahh. thanks. i tried downgrading, but did not install centos-release-xen44 so the downgrade failed. this makes sense now that i see that i would need to jump tracks. thanks for suggesting it. > > > i have tried for a couple of hours this morning to find a way to do the conversion in a post xend world, but can’t seem to do it. > > I still have all my disk images, and i see the domain config.sxp configuration files in /var/lib/xend/domains/<uuid> but i am not enough of a xen expert to figure out how to migrate those. > > > > is there a simple way to move to libxl now that xend is gone and i did not dump the xml files? > > So just checking -- the issue here is that you're not using the > ".cfg"-style config files, but the sxp-style config files? You're not > using libvirt, is that right? at the time i set all this up i don’t think i understood what i was doing very well. i certainly am using libvirt (i use virsh and virt-manager), so i am not sure what fork in the road i took to wind up making sxp-style config files. :} > > Unfortunately parsing sxp config files and running "managed domains" > are one feature that was explicitly chose as something we wouldn't be > supporting in xl going forward [1]. You'll probably have to do some > sort of manual conversion. > > -George > > [1] http://wiki.xen.org/wiki/XL#Anti-Features <http://wiki.xen.org/wiki/XL#Anti-Features> got it. i think i read thru that page too quickly before. since the images are there, and all i need to do is to effectively reconfigure the domUs, i think i will do that manually. that will accomplish two things: a) force me to document how i set them up better, and b) drive me to understand some aspects of this better… :} fortunately i had hosed up my dev host and dev VMs, and was smart enough to catch this mistake before i broke the production ones :} thanks again for all the help. r. -- /*************************************************************************/ Russ Gritzo email: rgritzo(a)gmail.com /**************************************************************************/

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Problems with scsi-target-utils when hosted on dom0 centos 7 xen box
by Nathan Coulson 18 Apr '16

18 Apr '16

Hello We were attempting to use scsi-target-utils, hosted on a xen dom0 vm using localhost, and running into some problems. I was not able to reproduce this on a centos 7.2 server using the default kernel. (From dmesg) Apr 4 11:18:42 funk kernel: [ 596.511204] connection2:0: detected conn error (1022) Apr 4 11:18:42 funk kernel: connection2:0: ping timeout of 5 secs expired, recv timeout 5, last rx 4295253788, last ping 4295258790, now 4295263808 Apr 4 11:18:42 funk kernel: connection2:0: detected conn error (1022) Apr 4 11:18:42 funk iscsid: Kernel reported iSCSI connection 2:0 error (1022 - Invalid or unknown error code) state (3) Apr 4 11:18:44 funk iscsid: connection2:0 is operational after recovery (1 attempts) Repeated a few times, until eventually Apr 4 11:19:44 funk kernel: Result: hostbyte=DID_TRANSPORT_DISRUPTED driverbyte=DRIVER_OK Apr 4 11:19:44 funk kernel: sd 7:0:0:1: [sdd] CDB: Apr 4 11:19:44 funk kernel: Write(10): 2a 00 01 df c7 e8 00 00 18 00 Apr 4 11:19:44 funk kernel: blk_update_request: I/O error, dev sdd, sector 31442920 Apr 4 11:19:44 funk kernel: [ 658.127596] sd 7:0:0:1: [sdd] Apr 4 11:19:44 funk kernel: [ 658.127688] Result: hostbyte=DID_TRANSPORT_DISRUPTED driverbyte=DRIVER_OK Apr 4 11:19:44 funk kernel: [ 658.127761] sd 7:0:0:1: [sdd] CDB: Apr 4 11:19:44 funk kernel: [ 658.127826] Write(10): 2a 00 01 df c7 e8 00 00 18 00 Apr 4 11:19:44 funk kernel: [ 658.127927] blk_update_request: I/O error, dev sdd, sector 31442920 Apr 4 11:19:44 funk kernel: [ 658.128040] sd 7:0:0:1: [sdd] Apr 4 11:19:44 funk kernel: sd 7:0:0:1: [sdd] Apr 4 11:19:44 funk kernel: [ 658.128105] Result: hostbyte=DID_TRANSPORT_DISRUPTED driverbyte=DRIVER_OK Apr 4 11:19:44 funk kernel: [ 658.128177] sd 7:0:0:1: [sdd] CDB: Apr 4 11:19:44 funk kernel: [ 658.128241] Write(10): 2a 00 00 00 08 00 00 00 18 00 Apr 4 11:19:44 funk kernel: [ 658.128339] blk_update_request: I/O error, dev sdd, sector 2048 Apr 4 11:19:44 funk kernel: Result: hostbyte=DID_TRANSPORT_DISRUPTED driverbyte=DRIVER_OK Apr 4 11:19:44 funk kernel: sd 7:0:0:1: [sdd] CDB: Apr 4 11:19:44 funk kernel: Write(10): 2a 00 00 00 08 00 00 00 18 00 Apr 4 11:19:44 funk kernel: blk_update_request: I/O error, dev sdd, sector 2048 (Test Setup) scsi-target-utils installed via yum, default config /etc/tgt/conf.d/xenguests.conf <target iqn.2016-02.com.bravenet:test> backing-store //mnt/vmdisk/test # vm image </target> systemctl tgtd restart iscsiadm -m discovery -t sendtargets -p localhost iscsiadm -m node -T iqn.2016-02.com.bravenet:test -l add it to lvm (pvcreate, vgcreate), let's call it /dev/vmdisk.vg/test.lv and then use libvirt to attempt to install an os on /dev/vmdisk.vg/test.lv (using anaconda) Around the time it tries to create the disk label, is when the conn errors start, until eventually it gives up trying to create the disk label. We tested a similar setup on a centos 7.2 host we use kvm based virtualmachine hosting on (default 3.10 kernel), and it worked fine. It may be similar to what was reported on https://bugzilla.redhat.com/show_bug.cgi?id=1245990, but I never saw a resolution on what they discovered (other then a reference to comment18 which does not appear to exist). Testing over the network appears to also work as well (where another machine connects to scsi-target-utils on the funk server above. Longterm Purpose of the above setup, was to get direct access to a filesystem image hosted on a gluster setup, using bs-type glfs on scsi-target-utils. -- Nathan Coulson www.bravenet.com nathan(a)bravenet.com

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migrating from xend to libxl after xen 4.6.1
by rgritzo 18 Apr '16

18 Apr '16

so i guess i was not paying too close attention and upgraded to xen 4.6.1 before i migrated my domU configurations to libxl :{ i have tried for a couple of hours this morning to find a way to do the conversion in a post xend world, but can’t seem to do it. I still have all my disk images, and i see the domain config.sxp configuration files in /var/lib/xend/domains/<uuid> but i am not enough of a xen expert to figure out how to migrate those. is there a simple way to move to libxl now that xend is gone and i did not dump the xml files? thanks in advance… r. -- /*************************************************************************/ Russ Gritzo email: rgritzo(a)gmail.com /**************************************************************************/

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XSA-174 kernel updates available in centos-virt-testing
by George Dunlap 14 Apr '16

14 Apr '16

kernel-3.18.25-20, with a fix for XSA-174, has been built in the cbs and is making its way through the system. It should be in centos-virt-xen-testing for both CentOS 6 and CentOS 7 shortly, and a signed version should be in mirrors after tomorrow's signing run. (This should be suitable for either people using Xen 4.6 or Xen 4.4.) Please test it and report any errors here. Thanks, -George

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Sorry for the noise
by Johnny Hughes 13 Apr '16

13 Apr '16

I moderated that out of office account from Steve Clark .. sorry for the noise. Thanks, Johnny Hughes

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Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Problems with scsi-target-utils when hosted on dom0 centos 7 xen box))))))))))
by Steve Clark 13 Apr '16

13 Apr '16

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Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Problems with scsi-target-utils when hosted on dom0 centos 7 xen box)))))))))
by Steve Clark 13 Apr '16

13 Apr '16

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Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Problems with scsi-target-utils when hosted on dom0 centos 7 xen box)))))))))
by Steve Clark 13 Apr '16

13 Apr '16

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Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Problems with scsi-target-utils when hosted on dom0 centos 7 xen box))))))))
by Steve Clark 13 Apr '16

13 Apr '16

1 0

Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Problems with scsi-target-utils when hosted on dom0 centos 7 xen box)))))))
by Steve Clark 13 Apr '16

13 Apr '16

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Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Problems with scsi-target-utils when hosted on dom0 centos 7 xen box))))))))
by Steve Clark 13 Apr '16

13 Apr '16

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Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Problems with scsi-target-utils when hosted on dom0 centos 7 xen box)))))))
by Steve Clark 13 Apr '16

13 Apr '16

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Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Problems with scsi-target-utils when hosted on dom0 centos 7 xen box))))))
by Steve Clark 13 Apr '16

13 Apr '16

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Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Problems with scsi-target-utils when hosted on dom0 centos 7 xen box)))))
by Steve Clark 13 Apr '16

13 Apr '16

1 0

Out of Office. (was: Out of Office. (was: Out of Office. (was: Out of Office. (was: Problems with scsi-target-utils when hosted on dom0 centos 7 xen box))))
by Steve Clark 13 Apr '16

13 Apr '16

1 0

Out of Office. (was: Out of Office. (was: Out of Office. (was: Problems with scsi-target-utils when hosted on dom0 centos 7 xen box)))
by Steve Clark 13 Apr '16

13 Apr '16

1 0

Out of Office. (was: Out of Office. (was: Problems with scsi-target-utils when hosted on dom0 centos 7 xen box))
by Steve Clark 13 Apr '16

13 Apr '16

1 0

Out of Office. (was: Problems with scsi-target-utils when hosted on dom0 centos 7 xen box)
by Steve Clark 13 Apr '16

13 Apr '16

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CentOS7, Xen 4.6.1, kernel 3.18.25-19 strange performance problem
by T.Weyergraf 11 Apr '16

11 Apr '16

Hi all, i just stumbled over a strange performance issue with my Xen setup. I use centos-virt Xen since a long time on my workstation and usually never check performance. However, yesterday I booted into the 3.18.25-19 Dom0 kernel *without* Xen and found the system noticably more responsive. That triggered me into running a simple kernel compile benchmark and compare the results: Testsequence: echo 3 > /proc/sys/vm/drop_caches make distclean cp ../.config . #copies an existing valid config for compile make oldconfig time make -j <threads> bzImage Results: xen 4.6.1 - kernel 3.18.25-19 16 threads: real 1m41.983s user 16m37.247s sys 5m7.121s 32 threads: real 1m29.240s user 23m7.170s sys 6m31.497s kernel 3.18.25-19 16 threads: real 1m12.909s user 14m37.627s sys 1m36.521s 32 threads: real 1m0.530s user 18m45.569s sys 1m58.807s Some notes: - System is a HP z840 with 2*8core E5 v3 Xeon and 128gig Ram. Disk is an Intel 750 ssd (PCIe nvme) - While normally in Xen, I limit Dom0 Memory via dom0_mem, but for the tests, Dom0 was allowed to use full memory - While running the test, no guest was running except Dom0. System was booted to graphical desktop and was completely unloaded otherwise - (boot-)logs showed no issues with ACPI or hardware-support or whatsoever. I have not yet run any in-depth investigation or tried too many different settings, but I find the differences quite noteworthy. So, if anybody came across the same issues, has some hints or suggestions, feel free. I'll continue poking around and if there is interest, i'll post updates. Regards, Thomas

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