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[libvirt] Libvirt for RHEL4 update4
by Gavin Gong 14 Feb '09

14 Feb '09

Hi Guys, We are eagerly trying to deploy libvirt on a production environment based on RHEL4 U4, but unfortunately it seems that for RHEL this API is only available for version5, we can't find any libvirt packages for RHEL4 U4, can you give us some advise for this situation? Thanks. Gavin Gavin Gong 3rd Line Engineer - Server/Database Technology DD: +44(0) 207 517 6581 M: +44(0) 7982 132 869 T: +44(0) 845 459 1111 F: +44(0) 207 517 6501 E: gavin.gong(a)controlcircle.com <mailto:gavin.gong@controlcircle.com> Data Storage Network Security Moorfoot House, 221 Marsh Wall Managed Connectivity Dedicated Hosting London E14 9FH Managed Services http://www.controlcircle.com <http://www.controlcircle.com/> Click here <http://www.controlcircle.com/ProductsNServices/Email-Privacy-and-confid entiality-statement> to view our privacy & confidentiality statement P Please don't print this e-mail unless you really need to.

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[libvirt] [PATCH] Fix migration for 3.3 xend
by John Levon 14 Feb '09

14 Feb '09

# HG changeset patch # User John Levon <john.levon(a)sun.com> # Date 1234535031 28800 # Node ID 3b0d2047df2c53ff2994d2bff4b1123110626ee2 # Parent 0c02b55855c7a3bfa1135887ffb1763ef29179e5 Fix migration for 3.3 xend xend grew a couple of new options for the migration method. As they're ignored on older xend versions, always pass them. Signed-off-by: John Levon <john.levon(a)sun.com> diff --git a/src/xend_internal.c b/src/xend_internal.c --- a/src/xend_internal.c +++ b/src/xend_internal.c @@ -4292,6 +4292,8 @@ xenDaemonDomainMigratePerform (virDomain "destination", hostname, "live", live, "port", port, + "node", "-1", + "ssl", "0", "resource", "0", /* required, xend ignores it */ NULL); VIR_FREE (hostname);

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[libvirt] [PATCH] libvirt.spec patch to fix some rpmlint warnings/errors
by Richard W.M. Jones 14 Feb '09

14 Feb '09

With this patch we remove some of the easier rpmlint warnings and errors. It is by no means rpmlint clean after applying this patch, but the remaining warnings and errors can be ignored. FWIW this is for the libvirt merge review: https://bugzilla.redhat.com/show_bug.cgi?id=226055 I'm not sure about the patch to libvirt.init.in, but rpmlint is quite insistent that we need this, or else we shouldn't start libvirtd by default. Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into Xen guests. http://et.redhat.com/~rjones/virt-p2v

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[libvirt] [PATCH 0/3] Fix aliasing rules warnings with gcc-4.4
by Mark McLoughlin 14 Feb '09

14 Feb '09

Hi, It seems gcc's strict aliasing rules got stricter with gcc-4.4. The basic rule is that two pointers of different types can't be used to reference the same address in memory. One exception is using a char* and another is when different types are members of a union. I've used unions to fix all the warnings I see with current CVS HEAD. I can't say I like the solution all that much, so if anyone has better ideas ... Cheers, Mark.

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[libvirt] [PATCH] avoid two test failures induced by today's error-reporting changes
by Jim Meyering 14 Feb '09

14 Feb '09

I'm applying these fixes to avoid "make check" failures: >From f41517a4250db0961482e097813eb39da5bea963 Mon Sep 17 00:00:00 2001 From: Jim Meyering <meyering(a)redhat.com> Date: Mon, 9 Feb 2009 16:25:36 +0100 Subject: [PATCH] avoid two test failures induced by today's error-reporting changes * tests/cpuset: Adjust expected diagnostic to match new behavior. * tests/undefine: Likewise. --- tests/cpuset | 4 ++-- tests/undefine | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/tests/cpuset b/tests/cpuset index 75303e3..eeb0ee2 100755 --- a/tests/cpuset +++ b/tests/cpuset @@ -1,7 +1,7 @@ #!/bin/sh # ensure that defining with an invalid vCPU cpuset elicits a diagnostic -# Copyright (C) 2008 Free Software Foundation, Inc. +# Copyright (C) 2008-2009 Free Software Foundation, Inc. # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by @@ -36,8 +36,8 @@ sed "s/vcpu>/vcpu cpuset='aaa'>/" xml > xml-invalid || fail=1 # Require failure and a diagnostic. virsh --connect test:///default define xml-invalid > out 2>&1 && fail=1 cat <<\EOF > exp || fail=1 -libvir: Domain Config error : failed Xen syscall topology cpuset syntax error error: Failed to define domain from xml-invalid +error: failed Xen syscall topology cpuset syntax error EOF compare exp out || fail=1 diff --git a/tests/undefine b/tests/undefine index 48e8356..fafdae7 100755 --- a/tests/undefine +++ b/tests/undefine @@ -1,7 +1,7 @@ #!/bin/sh # exercise virsh's "undefine" command -# Copyright (C) 2008 Free Software Foundation, Inc. +# Copyright (C) 2008-2009 Free Software Foundation, Inc. # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by @@ -29,8 +29,8 @@ fail=0 virsh -q -c test:///default undefine test > out 2>&1 test $? = 1 || fail=1 cat <<\EOF > exp || fail=1 -libvir: Test error : internal error Domain 'test' is still running error: Failed to undefine domain test +error: internal error Domain 'test' is still running EOF compare exp out || fail=1 -- 1.6.2.rc0.173.g5e148

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[libvirt] Domain comment/description string?
by Jan Kasprzak 13 Feb '09

13 Feb '09

Hello, I use KVM+qemu for testing various distributions and playing with different versions of software. Now I would like to migrate my virtual machines to libvirt. One of the problems is that I would like to have some sort of comment or description of the machine, which would be displayed in "virsh list" or in virt-manager together with the machine hostname. Example: <name>rei</name> <comment>Fedora rawhide/32bit</comment> or <name>konata</name> <comment>Gentoo x86_64 with KDE 4</comment> Does the libvirt XML format support something like this? Embedding comment inside the <name>...</name> tag does not work. Does libvirt support something like that? Thanks, -Yenya -- | Jan "Yenya" Kasprzak <kas at {fi.muni.cz - work | yenya.net - private}> | | GPG: ID 1024/D3498839 Fingerprint 0D99A7FB206605D7 8B35FCDE05B18A5E | | http://www.fi.muni.cz/~kas/ Journal: http://www.fi.muni.cz/~kas/blog/ | >> If you find yourself arguing with Alan Cox, you’re _probably_ wrong. << >> --James Morris in "How and Why You Should Become a Kernel Hacker" <<

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[libvirt] libvirtd and LVM snapshots
by Nick Moffitt 13 Feb '09

13 Feb '09

I'm working on an existing system that creates, manages, and destroys Xen guests on a pool of host systems, and I use LVM copy-on-write snapshots to keep creation rapid. http://libvirt.org/storage.html describes logical volume pools, for which you simply supply the name of a volume group and it allocates volumes from that. By my reading, it appears one can even provide a list of block devices and they will be carved into extents and pooled into a VG for you. Is there any interface to libvirtd that allows it to create volumes that are snapshots of existing volumes? If not, does anyone have advice for doing so manually in a way that plays smoothly with libvirt? -- Support your droogs! Nick Moffitt nick(a)zork.net

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[libvirt] Getting error "libvir: QEMU error : Domain not found"
by M. Mohan Kumar 13 Feb '09

13 Feb '09

Hi, When I try to run vm-install on a OpenSuse 11.1 machine, vm-install displays the following message "libvir: QEMU error : Domain not found". How ever the functionality is not affected. I don't think its really an error. It could be just an warning/information message. Is there any plan to change this message as warning/information from error level? Note: I am not in the mailing list, so please cc me while replying. -- Regards, M. Mohan Kumar

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[libvirt] [Patch] enable --checkpoint option in 'virsh save'
by Matt McCowan 12 Feb '09

12 Feb '09

Folks. I'm working on a scenario where I would like to provide my backup subsystems with a clean disk and ram state of any given VM, without necessitating shutting down the a VM. Xen's 'xm save' function with the '-c' (checkpoint) argument made sense in that I could checkpoint save the VM, take a snapshot of the LV containing the domain and its 'save' dump then resume the domain. Unfortunately out-of-the-box the Xen implementation did not pause the domain after the checkpoint, but resumed it automatically. Fastforward to using kvm ... Qemu/kvm with it's 'migrate' command by default left the domain paused after creating a state dump - just what I was looking for. A look at the libvirt code revealed that 'virsh save' carried out a migrate, then shut the domain down. So I have tried implementing a --checkpoint option into the save function using the --live option to the 'virsh migrate' function as a bit of a template. I'm a sysadmin, not a coder, so please forgive any oversights and all the other coding rules that may be broken. As mentioned before I did try to simply copy how the migrate --live option is used throughout. Patch (against 0.6.0) attached. I have also filed a feature request under bugzilla. If the additional feature is seen as warranted, please let me know what I can do to help implement it if the patch is not the way to go about it. Thankyou very much for Libvirt Regards Matt McCowan

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[libvirt] [PATCH] set an error when the domain doesn't show up
by Guido Günther 12 Feb '09

12 Feb '09

Hi, attached patch makes sure we set a proper error status when the domain doesn't show up. O.k. to apply? Cheers, -- Guido

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