try having soft links using ln command, may or may not work though :)
ln -s
On Wed, Aug 17, 2011 at 4:17 PM, Emanuele Verga
wrote:
> Hi Neil,
> thanks for the suggestion.
> I tried to do it. After recompiling hsflowd i checked the files it had open
> and it showed:
> hsflowd 30019 nobody mem REG 251,3 84728
> 927248 /usr/lib/libxenctrl.so.3.2.0
> hsflowd 30019 nobody mem REG 251,3 22928
> 927250 /usr/lib/libxenstore.so.3.0.0
> but this solution didn't work.
> Virtual machines stopped showing up in ganglia and hsflowd gave this error:
> ERROR Internal error: Could not obtain handle on privileged command
> interface (2 = No such file or directory)
> xc_interface_open() failed : No such file or directory
> then it continued to work normally (hsflowd log file:
> http://uploading.com/files/get/a3876c8b/ ) but it didn't report anything to
> ganglia and the VMS were shown as down, the reporting for the physical host
> instead it's working perfectly, as before.
> If it can help you, the implementation of Openstack we have uses KVM to
> virtualize the hosts. Could it be related?
> Thanks again,
> Emanuele
> 2011/8/16 Neil Mckee
>>
>> Hello,
>> On an OpenStack node you may be able to use libxenstore instead of
>> libvirt. You'll need to recompile hsflowd to try this. Looking at
>> trunk/src/Linux/Makefile it appears to look for libvirt first, but you can
>> override that by compiling hsflowd like this:
>> make clean
>> make LIBVIRT=no
>> The Makefile will then test for libxenstore and libxenctrl. If it finds
>> them it will compile with -DHSF_XEN (instead of -DHSF_VRT), and you may get
>> better results. Please let me know what happens.
>> Neil
>>
>>
>> On Aug 16, 2011, at 2:14 AM, Emanuele Verga wrote:
>>
>> Hi,
>> we have a problem with the following installation:
>> we have a system that’s a compute node in an Openstack test installation.
>> Now on this machine we decided to install Ganglia, to check it’s
>> monitoring capabilities regarding virtual machines hosted on that node by
>> Openstack.
>> We then proceeded to add the repository for ganglia version 3.2 and
>> install:
>> Hsflowd 1.18
>> Ganglia Monitor Demon 3.2.0.0
>> Ganglia Meta demon 3.2.0.0
>> Ganglia Web FronEnd 3.2.0.0
>> Dwoo 1.1.1
>> all on the same machine and to configure ports accordingly.
>> All said and done, the web frontend shown the physical host and all of
>> the VM, but we were unable to:
>> See the hypervisor section in the physical host statistics. It simply is
>> not there.
>> See the graphical preview for VM statistics
>> (http://imageshack.us/photo/my-images/585/screenshotgangliacomput.png/). The
>> thumbnail are missing but the links do work, clicking on one of the missing
>> thumbnails you are taken to the details page for that VM.
>> See details regarding VM hard disk and I/O.
>> (http://imageshack.us/photo/my-images/694/screenshotgangliainstan.png/)
>> Debugging hsflowd we found errors similar to the following:
>> Aug 16 06:26:57 eta hsflowd:
>> virStorageLookupByPath(/var/lib/nova/instances/instance-004d/disk.local)
>> failed
>> Aug 16 06:26:57 eta hsflowd:
>> virStorageLookupByPath(/var/lib/nova/instances/instance-004d/disk)
>> failed
>> The strange thing is, the path is correct.
>> We checked libvirt using virsh and found that the Storage Volumes are not
>> reported by libvirt, it seems because libvirt by default search
>> informations in path /var/lib/libvirt/images, instead nova places them
>> inside /var/lib/nova/instances/INSTANCENAME/.
>> Did you have the same problems when testing for Sflow/ Openstack ? How did
>> you manage to resolve it?
>> Any help is appreciated.
>> Thanks in advance for your support!
>>
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