RE: [Xen-users] drbd8 - lvm - xen

[Sebastian Igerl <sig@xxxxxxxxx>]

Hi,

Found out that it didn't had anything to to with drbd or lvm... 

I upgraded from 3.2.1  to xen-3.3.0...

No i can't start any domu's... regardless if they are on lvm drbd oder
local partiton...

Does anyone has any idea ?

xen4 conf # xm create test1.cfg 
> Using config file "./test1.cfg".
> Error: Device 768 (vbd) could not be connected.
> Device /dev/xen3and4/hd23 is mounted in the privileged domain,



xen4 conf # xm create test1.cfg 
> Using config file "./test1.cfg".
> Error: Device 768 (vbd) could not be connected.
> Device /dev/sda5 is mounted in the privileged domain,




another thing is... : is ist possible to make 20 different drbd devices
on one host ? drbd0 - drbd20 ? aren't there limits ? 


On Wed, 2008-09-10 at 15:27 +0100, Robert Dunkley wrote:
> Hi Sebastian,
> 
> I think you should split the volume into LVM partitions and then run a
> DRBD device for each partition. I run this config, RaidArray -> LVM ->
> DRBD8 -> Xen and it works well. You need the independence of one drbd
> device per VM otherwise things are difficult. You may also want to ask
> xen-users -at- antibozo.net for their DRBD script, on my Centos Xen 3.30
> setup it works much better, it also avoids the need for IMHO dangerous
> dual primary config.
> 
> I synch multiple arrays with multiple DRBD devices at once. DRBD equally
> shares the array write bandwidth between DRBD devices. My Raid1 arrays
> manage 80Mb/second each write speed, 2 DRBD devices synching at once on
> each of the 3 arrays yields 40mb.sec per DRBD device which totals a
> perfect 240Mb/sec synch rate (I used Infiniband to link the two DRBD
> servers together so am not bound by the bandwidth constraints of GB
> Ethernet). 
> 
> Rob
> 
> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Sebastian
> Igerl
> Sent: 10 September 2008 14:54
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-users] drbd8 - lvm - xen
> 
> Hi,
> 
> What I'm trying to to is to set up 1 drbd active/active device then
> split this with lvm creating about 20 volumes and then run xen on top of
> that lvm volums !
> 
> I tried for days now and it isn't working... anyhow, do you see any
> problems why this shouldn't work..
> 
> Should I create 20 drbd devices and use the drbd helper script for xen ?
> isn't using so many drbd syncs a lot of overhead ? never tried it...
> 
> 
> xen4 conf # xm create test1.cfg 
> Using config file "./test1.cfg".
> Error: Device 768 (vbd) could not be connected.
> Device /dev/xen3and4/hd23 is mounted in the privileged domain,
> 
> 
> This is what i'm getting right now.. 
> /dev/xen3and4/hd23 isn't mounted...
> 
> 
> 
> xen4 conf # cat test1.cfg 
> 
> kernel = "/usr/lib64/xen/boot/hvmloader"
> builder = "hvm"
> device_model = "/usr/lib64/xen/bin/qemu-dm"
> memory = "1024"
> maxmem = 2048
> maxmemory = 2048
> name = "test1"
> 
> dhcp = "off"
> vif = ["type=ioemu, mac=00:16:3e:00:00:20, bridge=xenbr0"]
> #cpus = ""
> #vcpus = 1 
> disk = ["phy:/dev/xen3and4/hd23,ioemu:hda,w" ]
> 
> serial="pty"
> boot="c"
> 
> vnc=1
> vncviewer=0
> keymap="de"
> vfb = [ "type=vnc, vncpasswd=ssss, vnclisten=0.0.0.0, vncdisplay=23" ]
> sdl=0
> 
> 
> 
> since i'm using lvm on top of drbd, xen should'nt be aware of drbd..
> using only lvm it workd...
> 
> mouting   drbd-lvm2-device works too.... ( only on one site because i
> haven't set up any cluster filesystems.. )
> 
> 
> 
> Thanks,
> 
> Sebastian
> 
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
> 
> The SAQ Group
> Registered Office: 18 Chapel Street, Petersfield, Hampshire. GU32 3DZ
> SEMTEC Limited trading as SAQ is Registered in England & Wales
> Company Number: 06481952
> 
> http://www.saqnet.co.uk AS29219
> SAQ Group Delivers high quality, honestly priced communication and I.T. 
> services to UK Business.
> DSL : Domains : Email : Hosting : CoLo : Servers : Racks : Transit : Backups 
> : Managed Networks : Remote Support.
> 
> Find us in http://www.thebestof.co.uk/petersfield
> 


_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users