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

Thu Jul 21 16:21:19 UTC 2011

2011/7/19 sharmila radha krishnan <sharmilaradhakrishnan at rediffmail.com>

> Hi,
>  I was finally able to connect to the xenapi hypervisor.  However, once I
> connect to virsh and give a 'quit' command I get  "* glibc detected ***
> virsh: double free or corruption (fasttop):". Please find below the actual
> memory dump.
>

I looked at the XenAPI driver and found a double-free problem, based on the
minimal stacktrace glibc provided. Here's a patch for this. I'd be glad if
you could test it, as I don't have a XenAPI setup at hand.

  https://www.redhat.com/archives/libvir-list/2011-July/msg01543.html

*Note:* I have disabled the SSL certificate verification in xenapi_driver.c
> by setting curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0) &
> curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0).
>

No need to edit the code for this. You can pass the no_verify option in the
connection URI to achieve this

  virsh -c xenapi://localhost/?no_verify=1

 Moreover, Iam not able to start any VMs uisng xencenter after i have
> started using virsh. It says,  *Error: Starting VM 'XenServer SDK
> 5.6.100-47101p import' - Internal error: another frontend device is already
> connected to this domain (frontend (domid=0 | kind=vbd | devid=51712);
> backend (domid=0 | kind=vbd | devid=51712)).* Even a reboot of the machine
> didnt help.
>

Sorry, I've no idea what the problem could be here.

Matthias

Any pointers on the above 2 issues would be of great help.
>
> Thanks in Advance!
>
> Regards,
> Sharmila
>
> From: "G Naresh Kumar"naresh.gadepalli at gmail.com
> Sent: Sat, 16 Jul 2011 16:55:16 +0530
> To: Matthias Bolte matthias.bolte at googlemail.com
> Cc: libvirt-users at redhat.com
> Subject: Re: [libvirt-users] Is libvirt supported on Citrix Xenserver?
>
> Hi Matthias,
>  >
>
> Sorry for the confusion.It was an edited one & hence thetypo. 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. Somehowfigured 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 debugthis issue.
>
> 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 canuse the source
>
> package and build & install the library without using'make rpm' ?
>
> 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
> >
>
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