Issue while bringing up libvirtd.service

Issue while bringing up libvirtd.service

[Praveen Kumar]

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Hi,

I am new in Xen environment and trying to get VMs running with the build
xen code base.

But, am facing issue bringing up the libvirt deamon. I have installed
latest unstable xen ( 4.9 ).
There seems to be a conflict in library version and because of which I am
getting below error :
...
Dec 08 00:44:43 kpraveen.labs.blr.novell.com libvirtd[14603]: Unable to
configure libxl's memory management parameters
Dec 08 00:44:43 kpraveen.labs.blr.novell.com libvirtd[14603]:
Initialization of LIBXL state driver failed: no error
Dec 08 00:44:43 kpraveen.labs.blr.novell.com libvirtd[14603]: Driver state
initialization failed
...

The problem is resolved when I remove libvirt-daemon-driver-libxl, but that
seems to be removing libvirt package also and causing below error during
vm-install :
....
Dec 08 00:41:59 kpraveen.labs.blr.novell.com libvirtd[7005]: no connection
driver available for xen:///
Dec 08 00:41:59 kpraveen.labs.blr.novell.com libvirtd[7005]: End of file
while reading data: Input/output error
....

I found that we have xen-libs of different version which is 4.7, but don't
know if that is the root cause and how to upgrade that. As suggested, I
have also rebuild xen tree and tried reinstalling, but the issue persists.

Any guidance will be very much helpful to resolve this problem . Also,
wanted to know, what others follow as best practices when there is a
version change or if hit the similar problem.
Just FYI, I am following
https://wiki.xenproject.org/wiki/Compiling_Xen_From_Source link for
compiling and installing xen.

Thanks in advance.

Regards,

~Praveen.

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Re: Issue while bringing up libvirtd.service

[Dario Faggioli]

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On Thu, 2016-12-08 at 01:11 +0530, Praveen Kumar wrote:
> Hi,
> 
Hey,

> I am new in Xen environment and trying to get VMs running with the
> build xen code base.
> 
> But, am facing issue bringing up the libvirt deamon. I have installed
> latest unstable xen ( 4.9 ).
> There seems to be a conflict in library version and because of which
> I am getting below error :
> ...
> Dec 08 00:44:43 kpraveen.labs.blr.novell.com libvirtd[14603]: Unable
> to configure libxl's memory management parameters
> Dec 08 00:44:43 kpraveen.labs.blr.novell.com libvirtd[14603]:
> Initialization of LIBXL state driver failed: no error
> Dec 08 00:44:43 kpraveen.labs.blr.novell.com libvirtd[14603]: Driver
> state initialization failed
> ...
> 
What distribution is this? In any case, if you are installing Xen
(staging / 4.9) from the sources, and then installing libvirt's
packages from the distro, that would not work.

In fact, most likely, libvirt packages will bring in as a dependency
the version of Xen hypervisor and toolstack that is also packaged by
the distro. At which point, you have two Xen environments installed in
the same host, which is asking for trouble.

> I found that we have xen-libs of different version which is 4.7, but
> don't know if that is the root cause and how to upgrade that. As
> suggested, I have also rebuild xen tree and tried reinstalling, but
> the issue persists.
> 
Yep, here it is the version mismatch and double environment issue I was
talking about.

> Any guidance will be very much helpful to resolve this problem .
> Also, wanted to know, what others follow as best practices when there
> is a version change or if hit the similar problem.
> Just FYI, I am following https://wiki.xenproject.org/wiki/Compiling_X
> en_From_Source link for compiling and installing xen.
> 
So, if you are able to build and install Xen from sources, you should,
as a first step, verify that everything is working by creating a VM
using the XL toolstack (`man xl', look at examples, search XL on our
Wiki, etc).

If you want to use libvirt, I don't think you have much alternative
than building libvirt from sources as well. If I want to test or do
some libvirt development on upstream Xen, that is what I do, FWIW.

Regards,
Dario
-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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Re: Issue while bringing up libvirtd.service

[Praveen Kumar]

On Fri, 2016-12-09 at 14:07 +0100, Dario Faggioli wrote:
> > 
Thanks Dario and Wei Liu.

I am able to create VMs using XL toolstack and removing old xen and
libvirt packages. I think you both were right, I had double environment
problem.

Thanks once again for your suggestions.

> On Thu, 2016-12-08 at 01:11 +0530, Praveen Kumar wrote:
> > 
> > Hi,
> > 
> Hey,
> 
> > I am new in Xen environment and trying to get VMs running with the
> > build xen code base.
> > 
> > But, am facing issue bringing up the libvirt deamon. I have
> > installed
> > latest unstable xen ( 4.9 ).
> > There seems to be a conflict in library version and because of
> > which
> > I am getting below error :
> > ...
> > Dec 08 00:44:43 kpraveen.labs.blr.novell.com libvirtd[14603]:
> > Unable
> > to configure libxl's memory management parameters
> > Dec 08 00:44:43 kpraveen.labs.blr.novell.com libvirtd[14603]:
> > Initialization of LIBXL state driver failed: no error
> > Dec 08 00:44:43 kpraveen.labs.blr.novell.com libvirtd[14603]:
> > Driver
> > state initialization failed
> > ...
> > 
> What distribution is this? In any case, if you are installing Xen
> (staging / 4.9) from the sources, and then installing libvirt's
> packages from the distro, that would not work.
> 
> In fact, most likely, libvirt packages will bring in as a dependency
> the version of Xen hypervisor and toolstack that is also packaged by
> the distro. At which point, you have two Xen environments installed
> in
> the same host, which is asking for trouble.
> 
> > 
> > I found that we have xen-libs of different version which is 4.7,
> > but
> > don't know if that is the root cause and how to upgrade that. As
> > suggested, I have also rebuild xen tree and tried reinstalling, but
> > the issue persists.
> > 
> Yep, here it is the version mismatch and double environment issue I
> was
> talking about.
> 
> > 
> > Any guidance will be very much helpful to resolve this problem .
> > Also, wanted to know, what others follow as best practices when
> > there
> > is a version change or if hit the similar problem.
> > Just FYI, I am following https://wiki.xenproject.org/wiki/Compiling
> > _X
> > en_From_Source link for compiling and installing xen.
> > 
> So, if you are able to build and install Xen from sources, you
> should,
> as a first step, verify that everything is working by creating a VM
> using the XL toolstack (`man xl', look at examples, search XL on our
> Wiki, etc).
> 
> If you want to use libvirt, I don't think you have much alternative
> than building libvirt from sources as well. If I want to test or do
> some libvirt development on upstream Xen, that is what I do, FWIW.
> 
> 

Regards,

~Praveen.

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Re: Issue while bringing up libvirtd.service

[Wei Liu]

On Thu, Dec 08, 2016 at 01:11:24AM +0530, Praveen Kumar wrote:
> Hi,
> 
> I am new in Xen environment and trying to get VMs running with the build
> xen code base.
> 
> But, am facing issue bringing up the libvirt deamon. I have installed
> latest unstable xen ( 4.9 ).
> There seems to be a conflict in library version and because of which I am
> getting below error :
> ...
> Dec 08 00:44:43 kpraveen.labs.blr.novell.com libvirtd[14603]: Unable to
> configure libxl's memory management parameters
> Dec 08 00:44:43 kpraveen.labs.blr.novell.com libvirtd[14603]:
> Initialization of LIBXL state driver failed: no error
> Dec 08 00:44:43 kpraveen.labs.blr.novell.com libvirtd[14603]: Driver state
> initialization failed
> ...

Please make sure 'xl info' works before proceeding.

> 
> The problem is resolved when I remove libvirt-daemon-driver-libxl, but that
> seems to be removing libvirt package also and causing below error during

If you're doing libvirt development, you don't want to use the package
in your distro.

> vm-install :
> ....
> Dec 08 00:41:59 kpraveen.labs.blr.novell.com libvirtd[7005]: no connection
> driver available for xen:///
> Dec 08 00:41:59 kpraveen.labs.blr.novell.com libvirtd[7005]: End of file
> while reading data: Input/output error
> ....
> 
> I found that we have xen-libs of different version which is 4.7, but don't
> know if that is the root cause and how to upgrade that. As suggested, I
> have also rebuild xen tree and tried reinstalling, but the issue persists.
> 

Please make sure you remove all Xen packages installed in your host.

> Any guidance will be very much helpful to resolve this problem . Also,
> wanted to know, what others follow as best practices when there is a
> version change or if hit the similar problem.
> Just FYI, I am following
> https://wiki.xenproject.org/wiki/Compiling_Xen_From_Source link for
> compiling and installing xen.
> 
> Thanks in advance.
> 
> Regards,
> 
> ~Praveen.

> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> https://lists.xen.org/xen-devel


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