10:18 a.m.
Hi,
I'm working on RHEL5.1 (libvirt-0.2.3-9.el5). I would like to know if
it is possible, using libvirt, to create a Xen PVM domU that has no
disks? And if this is possible how to code this ( a simple example is
ok).
I can create a configfile for "xm create ..." that works (just use
"disk = [ ]"). But I also need to do this koan (companion to cobbler)
and it uses libvirt.
Thanks,
Tim
--
Tim Verhoeven - tim.verhoeven.be(a)gmail.com - 0479 / 88 11 83
Hoping the problem magically goes away by ignoring it is the
"microsoft approach to programming" and should never be allowed.
(Linus Torvalds)
10:29 a.m.
Tim Verhoeven wrote:
I'm working on RHEL5.1 (libvirt-0.2.3-9.el5). I would like to
know if
it is possible, using libvirt, to create a Xen PVM domU that has no
disks? And if this is possible how to code this ( a simple example is
ok).
Did you try taking the XML, either from another running domain or from
the examples we give[1], and stripping out all the <disk> sections? I
looked at the code and it ought to work -- if it doesn't, then it's
probably a bug.
Rich.
[1] http://libvirt.org/format.html
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11:54 a.m.
Richard W.M. Jones wrote:
Tim Verhoeven wrote:
> I'm working on RHEL5.1 (libvirt-0.2.3-9.el5). I would like to know if
> it is possible, using libvirt, to create a Xen PVM domU that has no
> disks? And if this is possible how to code this ( a simple example is
> ok).
Did you try taking the XML, either from another running domain or from
the examples we give[1], and stripping out all the <disk> sections? I
looked at the code and it ought to work -- if it doesn't, then it's
probably a bug.
(From IRC), Tim says it works for Xen ... and I just verified that qemu
doesn't like it.
Rich.
[1] http://libvirt.org/format.html
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11:59 a.m.
On Thu, Nov 29, 2007 at 12:54:38PM -0500, Michael DeHaan wrote:
Richard W.M. Jones wrote:
>Tim Verhoeven wrote:
>>I'm working on RHEL5.1 (libvirt-0.2.3-9.el5). I would like to know if
>>it is possible, using libvirt, to create a Xen PVM domU that has no
>>disks? And if this is possible how to code this ( a simple example is
>>ok).
>
>Did you try taking the XML, either from another running domain or from
>the examples we give[1], and stripping out all the <disk> sections? I
>looked at the code and it ought to work -- if it doesn't, then it's
>probably a bug.
(From IRC), Tim says it works for Xen ... and I just verified that qemu
doesn't like it.
Yep, QEMU itself wants at least one disk otherwise it complains bitterly.
One option is '-hda /dev/null' - libvirt should probably add this itself
if no disks are set in the XML.
Dan.
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10:31 a.m.
On Thu, Nov 29, 2007 at 05:18:20PM +0100, Tim Verhoeven wrote:
Hi,
I'm working on RHEL5.1 (libvirt-0.2.3-9.el5). I would like to know if
it is possible, using libvirt, to create a Xen PVM domU that has no
disks? And if this is possible how to code this ( a simple example is
ok).
I can create a configfile for "xm create ..." that works (just use
"disk = [ ]"). But I also need to do this koan (companion to cobbler)
and it uses libvirt.
Well libvirt can dump XML for existing Xen domains, use
virsh dumpxml domainname
even if you used xm to create the domain.
Now I suppose you will just end up with a dump without any <disk>
entry in <devices> (but you will have a network one at least),
Daniel
--
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http://veillard.com/ | Rpmfind RPM search engine http://rpmfind.net/
10:49 a.m.
Tim Verhoeven wrote:
Hi,
I'm working on RHEL5.1 (libvirt-0.2.3-9.el5). I would like to know if
it is possible, using libvirt, to create a Xen PVM domU that has no
disks? And if this is possible how to code this ( a simple example is
ok).
I can create a configfile for "xm create ..." that works (just use
"disk = [ ]"). But I also need to do this koan (companion to cobbler)
and it uses libvirt.
I'm thinking the answer is "don't add the disks in the code".
Which
I'm trying now to verify that works.
I think it does.
--virt-size=0 on the profile edit makes for good syntax, methinks.
FWIW -- Tim mentioned on IRC that he wants this machine to keep the
storage on ISCSI and was thinking about doing
some interesting things to get the initrd out of Anaconda to save off an
NFS partition (for startup purposes). So the usual bootup
stuff won't work unless you pull out the initrd/etc. Any thoughts on
that part?
Thanks,
Tim
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5 comments
5 participants
participants (5)
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Daniel P. Berrange -
Daniel Veillard -
Michael DeHaan -
Richard W.M. Jones -
Tim Verhoeven