[ovirt-users] fileserver as a guest oVirt

[Niklas Fondberg]

Thanks, after reading it makes sense. I suppose I need to drop my hope of
having sharing possibility with the host.
I have two questions that you might be able to answer:
1. Does direct LUN support partitions or only whole devices
2. Do you know of any open source way of making them shareable to Ovirt?

My setup is simple:
- HP DL380 with dual Xeon and lots of RAM. Boots from seperate disk (USB)
- MSA60 with p411 attached to the HP DL380

When we grow oVirt we will grow with DL360¹s and use all shared storage
from the guest fileserver on the first host.



On 14/07/14 08:57, "Daniel Helgenberger" <daniel.helgenberger at m-box.de>
wrote:

>Hello,
>
>just add my 2ct: I did a lot of bench marking for our SAN (FC LUN's). I
>also need file servers for our SMB Clients.
>
>I recommend using Direct Attached LUNs for your purpose and attach them
>to the VMs as VirtIO-SCSI disks. You can even added them as shareable to
>oVirt if you deploy some kind of SAN file system (we use Quantum's
>StorNext).
>
>Bottom line, the implementation of VirtIO-SCSI is so well done and
>support in oVirt is great. I cound not see any bottlenecks in the
>visualization. For the foreseeable future I will not deploy bare metal
>file Servers again.
>
>HTH,
>
>On So, 2014-07-13 at 15:47 +0000, Niklas Fondberg wrote:
>> 
>> From: Karli Sjöberg <Karli.Sjoberg at slu.se<mailto:Karli.Sjoberg at slu.se>>
>> Date: Sunday 13 July 2014 14:51
>> To: Niklas Fondberg <niklas at vireone.com<mailto:niklas at vireone.com>>
>> Cc: "users at ovirt.org<mailto:users at ovirt.org>"
>><users at ovirt.org<mailto:users at ovirt.org>>, Karli Sjöberg
>><Karli.Sjoberg at slu.se<mailto:Karli.Sjoberg at slu.se>>
>> Subject: Re: [ovirt-users] fileserver as a guest oVirt
>> 
>> 
>> Den 12 jul 2014 22:49 skrev Niklas Fondberg
>><niklas at vireone.com<mailto:niklas at vireone.com>>:
>> >
>> >
>> >
>> > On 12 jul 2014, at 16:57, "Karli Sjöberg"
>><Karli.Sjoberg at slu.se<mailto:Karli.Sjoberg at slu.se>> wrote:
>> >
>> >>
>> >> Den 12 jul 2014 15:45 skrev Niklas Fondberg
>><niklas at vireone.com<mailto:niklas at vireone.com>>:
>> >> >
>> >> > Hi,
>> >> >
>> >> > I'm new to oVirt but I must say I am impressed!
>> >> > I am running it on a HP DL380 with an external SAS chassi.
>> >> > Linux dist is Centos 6.5 and oVirt is 3.4 running all-in-one (for
>>now until we need to have a second host).
>> >> >
>> >> > Our company (www.vireone.com) deals with system architecture for
>>many telco and media operators and is now setting up a small own
>>datacenter for our internal tests as well as our IT infrastructure.
>> >> > We are in the process of installing Zentyal for the SMB purposes
>>on a guest and it would be great to have that guest also serving a fs
>>path directory with NFS + SMB (which is semi crippled on the host after
>>oVirt installation with version 3 et.c.).
>> >> >
>> >> > Does anyone have an idea of how I can through oVirt (seen several
>>solutions using virsh and kvm) letting my Zentyal Ubuntu guest have
>>access to a host mount point or if necessary (second best) a seperate
>>partition?
>> >> >
>> >> > Best regards
>> >> > Niklas
>> >> >
>> >>
>> >> Why not just give the guest a thin provision virtual hard drive and
>>expand it on a demand basis?
>> >>
>> >> /K
>> >
>> > Thanks for the advise but this would not suite us I'm afraid. It
>>would be difficult wrt incremental backups as well as host machine
>>file-routines.
>> >
>> >
>> 
>> Well, going by Occam's raizor; the simplest answer is usually correct.
>>Can't really tell what you mean by file-routines but backups would be
>>well served by snapshots (can't get more incremental than that) and
>>disaster recovery could be as easy as a rsync from inside the guest to a
>>remote machine.
>> 
>> The biggest pros here is the ease of being able to setup an export
>>domain, attach, export the VM, detach domain, and then attach and import
>>to a "real" setup when the AIO starts feeling crowded later on. Thinking
>>ahead is never a bad thing, no?
>> 
>> /K
>> 
>> Thanks for your suggestions!
>> The thing also is that the performance will be very bad if we have the
>>25TB SAS array shared for our purposes (lots of media streaming) using a
>>virtual disk.
>> What I am after (after more reading) is support for virtio-9p-pci
>>(http://www.linux-kvm.org/page/9p_virtio) using oVirt. Alternative is
>>the Direct LUN hook (http://www.ovirt.org/VDSM-Hooks/directlun, if I can
>>figure out how to work with hooks...)
>> Any chance anybody has an answer for these questions?
>> 
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>
>-- 
>
>Daniel Helgenberger
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