[libvirt-users] Is libvirt supported on Citrix Xenserver?

Thu Jul 21 13:34:04 UTC 2011

2011/7/16 G Naresh Kumar <naresh.gadepalli at gmail.com>:
> Hi Matthias,
>
>
>
> Sorry for the confusion.It was an edited one & hence the typo. Below is the
>
> actual output:
>
>
>
> # virsh -c xenapi://<myip>
>
> Enter username for <myip>: root
>
> Enter root's password for <myip>:
>
> error: authentication failed: (null)
>
>
>
> I was not able to get anything in the Xen logs. Somehow figured out to print
>
> the Xen error using the patch given at the link http://osdir.com/ml/libvir-
>
> list/2011-06/msg00298.html. It prints "TRANSPORT_FAULT". Any pointers to
> this
>
> error would be much appreciated. Iam also trying to debug this issue.

The mentioned patch is part of libvirt 0.9.3, but it has a problem. It
altered the call to xenapiSessionErrorHandler in xenapiOpen in a way
that breaks error reporting. libxenserver returns a list of strings
that represents the complete error message. xenapiSessionErrorHandler
with last parameter set to NULL, composes all parts of the error
message into a single string. But the mentioned patch only takes the
first part, in your case "TRANSPORT_FAULT". The second part of that
error message is an numeric error code that might help to understand
the problem.

I just posed a patch to be applied on top of current git to fix this

  https://www.redhat.com/archives/libvir-list/2011-July/msg01496.html

I attached a version of this patch that should apply to libvirt 0.9.3.
I'd be glad if you could test it, as I don't have a XenAPI setup at
hand. With that patch applied to libvirt 0.9.3 (or libvirt 0.9.2 + the
patch you mentioned before) you should get 'TRANSPORT_FAULT :
<error_code>' as error message and the number could help to figure out
what the actual problem is.

> As per your suggestion,
>
> I had used make rpm. But it requires xen-devel pacakge, which I was
>
> not able to get for Xen 3.4.2. Is there any way where I can use the source
>
> package and build & install the library without using 'make rpm' ?

You can just do the normal ./configure, make and make install dance as
libvirt is autotools based.

> Thanks for all the help.
>
> Regards
>
> Naresh
>
> On Thu, Jul 14, 2011 at 7:07 PM, Matthias Bolte
> <matthias.bolte at googlemail.com> wrote:
>>
>> 2011/7/14 G Naresh Kumar <naresh.gadepalli at gmail.com>:
>> > Hi Maththias,
>> > Thanks for the help. I finally was able to compile/install libvirt on
>> > xenserver.
>> >
>> > I tried compiling the libvirt 0.9.2 with xen api support. Was able to
>> > install it successfully. When I tried giving the virsh command, I got an
>> > ‘authentication failed’ error as shown below.
>> >
>> > # virsh -c xenapi://<my local ip>
>> > Enter username for <mylocalip>: root
>>
>> Here you entered root
>>
>> > Enter intel123's password for <my local ip>:
>>
>> but here it asks for intel123's, that's unexpected. Did you edit this
>> one before mailing it, or is there really this mismatch?
>>
>> > error: authentication failed: (null)
>>
>> Outputting (null) here is actually a bug. The only way this can happen
>> is when the login attempt fails but the XenServer doesn't provide an
>> error message. Maybe have a look at the XenServer logs to see if it
>> says something about a failed login attempt.
>>
>> > I also tried connecting to the local machine as below,
>> >
>> > virsh -c "xenapi:///"
>> > error: authentication failed: Server name not in URI
>> > error: failed to connect to the hypervisor
>>
>> The XenAPI driver expects a server name. xenapi:/// _could_ be treated
>> as xenapi://localhost, but it's not implemented that way.
>>
>> > Also I am trying to install ruby-libvirt on xenserver, which looks like
>> > requires libvirt-devel package to be installed. How do I build it from
>> > the
>> > libvirt 0.9.2 source package.
>>
>> Running 'make rpm' should build an libvirt-devel RPM package for you.
>>
>> > Thanks,
>> >
>> > Naresh
>> >
>> > On Wed, Jun 15, 2011 at 8:19 PM, Matthias Bolte
>> > <matthias.bolte at googlemail.com> wrote:
>> >>
>> >> 2011/6/15 G Naresh Kumar <naresh.gadepalli at gmail.com>:
>> >> > Hi Maththias,
>> >> >
>> >> > Thanks a lot for your response!.
>> >> >
>> >> > Is there a specific version of libvirt from which xenserver support
>> >> > is
>> >> > added? I am getting the below error
>> >> >
>> >> > "error: invalid argument in libvirt was built without the 'xenapi'
>> >> > driver"
>> >>
>> >> The means that your libvirt version is new enough and contains the
>> >> XenAPI driver but that it was disabled on configure time, probably
>> >> because the build server didn't have libxenserver installed and
>> >> libvirt's configure script automatically disabled the driver because
>> >> of a missing dependency.
>> >>
>> >> > I have installed libvirt from citrix yum repo.
>> >>
>> >> Then Citrix build libvirt without XenAPI support. As a long term
>> >> solution you could report to whom ever is responsible for that repo
>> >> and request to enabled XenAPI support in that libvirt package. As a
>> >> short term solution you could build libvirt from source yourself and
>> >> make sure to get the XenAPI driver enabled.
>> >>
>> >> > I am using Xenserver 5.5 with libvirt 0.8.2 and it does not seem to
>> >> > be
>> >> > working.
>> >>
>> >> According to http://libvirt.org/hvsupport.html and the error message
>> >> 0.8.2 is new enough.
>> >>
>> >> Matthias
>> >>
>> >> > Thanks,
>> >> >
>> >> > Naresh
>> >> >
>> >> > On Jun 15, 2011 7:03 PM, "Matthias Bolte"
>> >> > <matthias.bolte at googlemail.com>
>> >> > wrote:
>> >> >> 2011/6/15 G Naresh Kumar <naresh.gadepalli at gmail.com>:
>> >> >>> Hi,
>> >> >>> Is libvirt supported on Citrix Xenserver. I have been searching for
>> >> >>> the
>> >> >>> same
>> >> >>> with little/no luck.
>> >> >>> If supported, can you point to some links/documents which can help
>> >> >>> me
>> >> >>> try
>> >> >>> out the same.
>> >> >>> Thanks,
>> >> >>> Naresh
>> >> >>
>> >> >> libvirt can use XenAPI via libxenserver [1]. That should allow you
>> >> >> to
>> >> >> use libvirt with a Citrix XenServer. You can use virsh like this
>> >> >> assuming you have a libxenserver enabled libvirt:
>> >> >>
>> >> >> virsh -c xenapi://my-xen-server
>> >> >>
>> >> >> But it's true, there is no documentation about this on the libvirt
>> >> >> website
>> >> >> yet.
>> >> >>
>> >> >> [1] http://community.citrix.com/display/xs/Download+SDKs
>> >> >>
>> >> >> --
>> >> >> Matthias Bolte
>> >> >> http://photron.blogspot.com
>> >> >
>> > --
>> > I was an atheist till I realized I am GOD
>> >
>>
>> --
>> Matthias Bolte
>> http://photron.blogspot.com
>
>
>
> --
> I was an atheist till I realized I am GOD
>

-- 
Matthias Bolte
http://photron.blogspot.com
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