XEN-API problems

XEN-API problems

[Jacek Konieczny]

Hello,

For my current project I need to automate domain creation and some basic
management. I thought XEN-API may be a better way than writing xm config
and calling xm to create and manage domains. 

Unfortunately the XEN-API documentation and examples I found seem a bit
outdated. By trial and error I managed to login to xend and create a VM
with a few VBDs (but I still don't quite understand how those VBD/VDI/SR
work)... however when trying to start the VM I get:

{'Status': 'Failure', 'ErrorDescription': ['INTERNAL_ERROR', "(11, 'Resource temporarily unavailable')"]}

In xend.log I get:

[2007-06-13 10:13:43 1905] ERROR (XendDomainInfo:1540) XendDomainInfo.initDomain: exception occurred
Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/xen/xend/XendDomainInfo.py", line 1517, in _initDomain
  File "/usr/lib/python2.5/site-packages/xen/xend/image.py", line 112, in createImage
  File "/usr/lib/python2.5/site-packages/xen/xend/image.py", line 131, in createDomain
  File "/usr/lib/python2.5/site-packages/xen/xend/image.py", line 517, in buildDomain
  File "/usr/lib/python2.5/site-packages/xen/xend/image.py", line 215, in buildDomain
Error: (11, 'Resource temporarily unavailable')
[2007-06-13 10:13:43 1905] ERROR (XendDomainInfo:416) VM start failed

There is nothing interesting in the "xm dmesg" output, despite "loglvl=all
guest_loglvl=all" xen boot options.

How can I find out what went wrong? Is the XEN-API usable at all? Is there any up-to-date
XEN-API documentation and/or examples available?

Greets,
        Jacek

Re: XEN-API problems

[SwissCenter HelpDesk]

Hello,

I am currently having the same problems. I wasn't able to create and 
start a VM using the Xen-API
(xen 3.1 built from source).

Any help and/or real world examples would be really appreciated.

Best regards,

-- 
Sébastien Riccio
SwissCenter / OpenBusiness SA
sr@openbusiness.com


Jacek Konieczny a écrit :
> Hello,
>
> For my current project I need to automate domain creation and some basic
> management. I thought XEN-API may be a better way than writing xm config
> and calling xm to create and manage domains. 
>
> Unfortunately the XEN-API documentation and examples I found seem a bit
> outdated. By trial and error I managed to login to xend and create a VM
> with a few VBDs (but I still don't quite understand how those VBD/VDI/SR
> work)... however when trying to start the VM I get:
>
> {'Status': 'Failure', 'ErrorDescription': ['INTERNAL_ERROR', "(11, 'Resource temporarily unavailable')"]}
>
> In xend.log I get:
>
> [2007-06-13 10:13:43 1905] ERROR (XendDomainInfo:1540) XendDomainInfo.initDomain: exception occurred
> Traceback (most recent call last):
>   File "/usr/lib/python2.5/site-packages/xen/xend/XendDomainInfo.py", line 1517, in _initDomain
>   File "/usr/lib/python2.5/site-packages/xen/xend/image.py", line 112, in createImage
>   File "/usr/lib/python2.5/site-packages/xen/xend/image.py", line 131, in createDomain
>   File "/usr/lib/python2.5/site-packages/xen/xend/image.py", line 517, in buildDomain
>   File "/usr/lib/python2.5/site-packages/xen/xend/image.py", line 215, in buildDomain
> Error: (11, 'Resource temporarily unavailable')
> [2007-06-13 10:13:43 1905] ERROR (XendDomainInfo:416) VM start failed
>
> There is nothing interesting in the "xm dmesg" output, despite "loglvl=all
> guest_loglvl=all" xen boot options.
>
> How can I find out what went wrong? Is the XEN-API usable at all? Is there any up-to-date
> XEN-API documentation and/or examples available?
>
> Greets,
>         Jacek
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
>
>
>   

mem 0MB, pfn out of range (Re: XEN-API problems)

[Jacek Konieczny]

On Wed, Jun 13, 2007 at 10:22:01AM +0200, Jacek Konieczny wrote:
> Unfortunately the XEN-API documentation and examples I found seem a bit
> outdated. By trial and error I managed to login to xend and create a VM
> with a few VBDs (but I still don't quite understand how those VBD/VDI/SR
> work)... however when trying to start the VM I get:
> 
> {'Status': 'Failure', 'ErrorDescription': ['INTERNAL_ERROR', "(11, 'Resource temporarily unavailable')"]}

After enabling some Xend debugging I got the error message in
domain-builder-ng.log:

xc_dom_mem_init: mem 0 MB, pages 0x0 pages, 4k each
xc_dom_mem_init: 0x0 pages
xc_dom_boot_mem_init: called
x86_compat: guest xen-3.0-x86_32p, address size 32
xc_dom_build_image: called
xc_dom_alloc_segment:   kernel       : 0xc0100000 -> 0xc035b000  (pfn 0x100 + 0x25b pages)
xc_dom_pfn_to_ptr: pfn out of range (0x100 > 0x0)
xc_dom_release: called

It seems the problem is "pfn out of range" and this may be related to
the "mem 0 MB".

Maybe this helps somehow? I will investigate further.

Greets,
        Jacek

Re: mem 0MB, pfn out of range (Re: XEN-API problems)

[Jacek Konieczny]

On Thu, Jun 14, 2007 at 01:26:59PM +0200, Jacek Konieczny wrote:
> xc_dom_mem_init: mem 0 MB, pages 0x0 pages, 4k each
> xc_dom_mem_init: 0x0 pages

Ok, it was my mistake: domain parameters memory_* are in bytes, not MiBs.
Now the XEN-API created domain boots :-)

Greets,
        Jacek

Re: XEN-API problems

[Saurabh Garg]

Hi,

This usually happens when the memory comes to be zero. Please verify the 
logs to see if "memsize" is appearing as zero. Also verify that you are 
setting the memory (dynamic/static) during creation time to be in bytes.

Hope this helps...

Saurabh.

SwissCenter HelpDesk wrote:
> Hello,
>
> I am currently having the same problems. I wasn't able to create and 
> start a VM using the Xen-API
> (xen 3.1 built from source).
>
> Any help and/or real world examples would be really appreciated.
>
> Best regards,
>