xen-testing and redhat-cluster devel

xen-testing and redhat-cluster devel

[Fajar A. Nugraha]

Hi,

I'm using xen on two-node redhat cluster (CVS devel version), using lvm 
as storage backend.
redhat cluster is used to synchronize LVM metadata (using clvmd) and as 
storage
for domain configs and dom-U kernels (with gfs).

Latest version of redhat cluster works with xen-2.0.4, but not with 
xen-2.0-testing.
ccsd failed to start on 2.0-testing. Anyone knows what the problem is?

I assume most feature on 2.0-testing will eventually moved to 2.0-stable?
I'm satisfied with the current confuration, and I was hoping that future 
versions
of xen and redhat cluster will be able to coexist together.

Regards,

Fajar





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Re: xen-testing and redhat-cluster devel

[Arthur Bergman]

On 15 Feb 2005, at 05:38, Fajar A. Nugraha wrote:

> Latest version of redhat cluster works with xen-2.0.4, but not with 
> xen-2.0-testing.
> ccsd failed to start on 2.0-testing. Anyone knows what the problem is?
>
>

My bet would be something TLS related. The only other example with this 
I have seen is multipathd which just doesn't run under xen, and even 
goes as far as segfaults gdb if you try to debug it.

Cheers
Arthur


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Re: xen-testing and redhat-cluster devel

[Fajar A. Nugraha]

Arthur Bergman wrote:

>
> On 15 Feb 2005, at 05:38, Fajar A. Nugraha wrote:
>
>> Latest version of redhat cluster works with xen-2.0.4, but not with 
>> xen-2.0-testing.
>> ccsd failed to start on 2.0-testing. Anyone knows what the problem is?
>>
>>
>
> My bet would be something TLS related. The only other example with 
> this I have seen is multipathd which just doesn't run under xen, and 
> even goes as far as segfaults gdb if you try to debug it.
>
I'm using gentoo, without nptl USE flag. Therefore, I don't even have 
/lib/tls :)
Anyway, it worked with xen-2.0.4, which is good,
but I'm worried that if -testing becomes 2.0.5 it will stop working.

Regards,

Fajar



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Re: xen-testing and redhat-cluster devel

[Arthur Bergman]

On 15 Feb 2005, at 07:45, Fajar A. Nugraha wrote:

> Arthur Bergman wrote:
>
>>
>> On 15 Feb 2005, at 05:38, Fajar A. Nugraha wrote:
>>
>>> Latest version of redhat cluster works with xen-2.0.4, but not with 
>>> xen-2.0-testing.
>>> ccsd failed to start on 2.0-testing. Anyone knows what the problem 
>>> is?
>>>
>>>
>>
>> My bet would be something TLS related. The only other example with 
>> this I have seen is multipathd which just doesn't run under xen, and 
>> even goes as far as segfaults gdb if you try to debug it.
>>
> I'm using gentoo, without nptl USE flag. Therefore, I don't even have 
> /lib/tls :)
> Anyway, it worked with xen-2.0.4, which is good,
> but I'm worried that if -testing becomes 2.0.5 it will stop working.
>
> Regards,
>
> Fajar
>
>

Testing clvmd, testing xen, testing redhat cluster on gentoo, like 
living on the bleeding edge ;-).

What does gdb tell you about the ccsd backtrace?

Cheers

-----
CTO @ Fotango Ltd
+447834716919
http://www.fotango.com/




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Re: xen-testing and redhat-cluster devel

[Fajar A. Nugraha]

Arthur Bergman wrote:

> On 15 Feb 2005, at 07:45, Fajar A. Nugraha wrote:
>
>> I'm using gentoo, without nptl USE flag. Therefore, I don't even have 
>> /lib/tls :)
>> Anyway, it worked with xen-2.0.4, which is good,
>> but I'm worried that if -testing becomes 2.0.5 it will stop working.
>>
>> Regards,
>>
>> Fajar
>>
>>
>
> Testing clvmd, testing xen, testing redhat cluster on gentoo, like 
> living on the bleeding edge ;-).
>
I do, don't I :)
It's very promising though. If it works.
You'll have shared storage for all the virtual domains, which means xm 
migrate should work nicely.
It should work without clvmd, but I would have to reboot one node to 
synchronize LVM metadata each time I add
new LV. And redhat cluster does not say it have to be run on redhat 
systems :)

> What does gdb tell you about the ccsd backtrace?
>
Which output of bt do I need to post? all?

Regards,

Fajar


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Re: xen-testing and redhat-cluster devel

[Arthur Bergman]

On 15 Feb 2005, at 08:04, Fajar A. Nugraha wrote:

> I do, don't I :)
> It's very promising though. If it works.
> You'll have shared storage for all the virtual domains, which means xm 
> migrate should work nicely.
> It should work without clvmd, but I would have to reboot one node to 
> synchronize LVM metadata each time I add
> new LV. And redhat cluster does not say it have to be run on redhat 
> systems :)
>

Actually you don't, you can not use clvmd and instead use a manual 
process of not letting anyone than you do any changes, and then just 
/etc/init.d/lvm restart/reload, or kill the lvm cache issue the lvm 
commands themselves.

>> What does gdb tell you about the ccsd backtrace?
>>
> Which output of bt do I need to post? all?
>

A backtrace of where it crashes wouldn't hurt I think.

> Regards,
>
> Fajar
>
>

Cheers
Arthur

-----
CTO @ Fotango Ltd
+447834716919
http://www.fotango.com/



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RE: xen-testing and redhat-cluster devel

[Ian Pratt]

 

> I'm using xen on two-node redhat cluster (CVS devel version), 
> using lvm 
> as storage backend.
> redhat cluster is used to synchronize LVM metadata (using 
> clvmd) and as 
> storage
> for domain configs and dom-U kernels (with gfs).
> 
> Latest version of redhat cluster works with xen-2.0.4, but not with 
> xen-2.0-testing.
> ccsd failed to start on 2.0-testing. Anyone knows what the problem is?

I've no idea which changset is causing the problem. Perhaps you could
use BK to do a 'binary chop' to determine what the problematic one is?

> I assume most feature on 2.0-testing will eventually moved to 
> 2.0-stable?

Yes, it would be good to find out what the problem is before the 2.0.5
release.

Best,
Ian

> I'm satisfied with the current confuration, and I was hoping 
> that future 
> versions
> of xen and redhat cluster will be able to coexist together.
> 
> Regards,
> 
> Fajar
> 
> 
> 
> 
> 
> -------------------------------------------------------
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> 


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