Hi, I''m having difficulty understanding why my domU image will not boot if there are more than 1 disk device from the same LVM volume group allocated to a domU. For example: The basic diagram below tries to show how my disk stacking is setup. ------------------------ | / | /usr | ------------------------ | domU | ------------------------ | xvda1 | xvda2 | ------------------------ | LV1 | LV2 | ------------------------ | LVM | ------------------------ | /dev/drbd0 | ------------------------ | /dev/sda1 | ------------------------ For some reason creating a domU in this configuration results in a message; "Error: Device 51729 (vbd) could not be connected. Hotplug scripts not working. " in the logs there are entries with; "[2008-07-23 14:51:58 xend 8058] DEBUG (blkif:24) exception looking up device number for xvda1: [Errno 2] No such file or directory: \047/ dev/xvda1\047" "[2008-07-23 14:51:58 xend 8058] DEBUG (blkif:24) exception looking up device number for xvda2: [Errno 2] No such file or directory: \047/ dev/xvda2\047" But if I boot a domU with only 1 logical volume assigned to the domU (see diagram below) the VM boots without problems. ------------- | / | ------------- | domU | ------------- | xvda | ------------- | LV1 | ------------------------ | LVM | ------------------------ | /dev/drbd0 | ------------------------ | /dev/sda1 | ------------------------ I have trolled the net looking for some answers but none seem to provide one. Any help on what may be the cause would be greatly appreciated. I can provide config examples if that will help, but at this stage I''m thinking it may be a bug and not wrong configuration. I may be wrong though :) Thanks. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Stephan Seitz
2008-Jul-23 08:47 UTC
Re: [Xen-users] Problems booting domU from lvm with multiple LV''s
Hi, could you send your domU config please? I assume the disk entry is garbled. If your vg is named LVM and your lv''s are named LV1 and LV2 this line reads e.g. disk = [ ''phy:/dev/LVM/LV1,xvda1,rw'',''phy:/dev/LVM/LV2,xvda2,rw'' ] cheers Stephan Jai schrieb:> Hi, > > I''m having difficulty understanding why my domU image will not boot if > there are more than 1 disk device from the same LVM volume group > allocated to a domU. > > For example: > The basic diagram below tries to show how my disk stacking is setup. > ------------------------ > | / | /usr | > ------------------------ > | domU | > ------------------------ > | xvda1 | xvda2 | > ------------------------ > | LV1 | LV2 | > ------------------------ > | LVM | > ------------------------ > | /dev/drbd0 | > ------------------------ > | /dev/sda1 | > ------------------------ > For some reason creating a domU in this configuration results in a message; > "Error: Device 51729 (vbd) could not be connected. Hotplug scripts not > working. " > in the logs there are entries with; > "[2008-07-23 14:51:58 xend 8058] DEBUG (blkif:24) exception looking up > device number for xvda1: [Errno 2] No such file or directory: > \047/dev/xvda1\047" > "[2008-07-23 14:51:58 xend 8058] DEBUG (blkif:24) exception looking up > device number for xvda2: [Errno 2] No such file or directory: > \047/dev/xvda2\047" > > But if I boot a domU with only 1 logical volume assigned to the domU > (see diagram below) the VM boots without problems. > ------------- > | / | > ------------- > | domU | > ------------- > | xvda | > ------------- > | LV1 | > ------------------------ > | LVM | > ------------------------ > | /dev/drbd0 | > ------------------------ > | /dev/sda1 | > ------------------------ > > I have trolled the net looking for some answers but none seem to provide > one. Any help on what may be the cause would be greatly appreciated. I > can provide config examples if that will help, but at this stage I''m > thinking it may be a bug and not wrong configuration. I may be wrong > though :) > > Thanks. > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users-- Stephan Seitz Senior System Administrator *netz-haut* e.K. multimediale kommunikation zweierweg 22 97074 würzburg fon: +49 931 2876247 fax: +49 931 2876248 web: www.netz-haut.de <http://www.netz-haut.de/> registriergericht: amtsgericht würzburg, hra 5054 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Andy Burns
2008-Jul-23 08:53 UTC
Re: [Xen-users] Problems booting domU from lvm with multiple LV''s
On 23/07/2008 07:19, Jai wrote:> I''m having difficulty understanding why my domU image will not boot if > there are more than 1 disk device from the same LVM volume group > allocated to a domU.I can''t directly help, other than to say that I have several domUs, with multiple phy: xvd* disks - some with two LVs from the same VG, others with one LV from each of two VGs. I don''t have drbd in the equation, but I have md raid (R1 for one VG, R5 for the other) _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Jai
2008-Jul-23 10:14 UTC
Re: [Xen-users] Problems booting domU from lvm with multiple LV''s
Sometimes all it takes is the act of trying to explain it to an email to understand the problem.... Turns out I had incorrect entries in / etc/fstab vs the xvd? in the domU image. It now boots as expected. I thank you for your response. Cheers, Jai On 23/07/2008, at 6:47 PM, Stephan Seitz wrote:> Hi, > > could you send your domU config please? > > I assume the disk entry is garbled. If your vg is named LVM and your > lv''s are named LV1 and LV2 this line reads e.g. > > disk = [ ''phy:/dev/LVM/LV1,xvda1,rw'',''phy:/dev/LVM/LV2,xvda2,rw'' ] > > cheers > > Stephan > > > Jai schrieb: >> Hi, >> I''m having difficulty understanding why my domU image will not >> boot if there are more than 1 disk device from the same LVM volume >> group allocated to a domU. >> For example: >> The basic diagram below tries to show how my disk stacking is setup. >> ------------------------ >> | / | /usr | >> ------------------------ >> | domU | >> ------------------------ >> | xvda1 | xvda2 | >> ------------------------ >> | LV1 | LV2 | >> ------------------------ >> | LVM | >> ------------------------ >> | /dev/drbd0 | >> ------------------------ >> | /dev/sda1 | >> ------------------------ >> For some reason creating a domU in this configuration results in a >> message; >> "Error: Device 51729 (vbd) could not be connected. Hotplug scripts >> not working. " >> in the logs there are entries with; >> "[2008-07-23 14:51:58 xend 8058] DEBUG (blkif:24) exception >> looking up device number for xvda1: [Errno 2] No such file or >> directory: \047/dev/xvda1\047" >> "[2008-07-23 14:51:58 xend 8058] DEBUG (blkif:24) exception >> looking up device number for xvda2: [Errno 2] No such file or >> directory: \047/dev/xvda2\047" >> But if I boot a domU with only 1 logical volume assigned to the >> domU (see diagram below) the VM boots without problems. >> ------------- >> | / | >> ------------- >> | domU | >> ------------- >> | xvda | >> ------------- >> | LV1 | >> ------------------------ >> | LVM | >> ------------------------ >> | /dev/drbd0 | >> ------------------------ >> | /dev/sda1 | >> ------------------------ >> I have trolled the net looking for some answers but none seem to >> provide one. Any help on what may be the cause would be greatly >> appreciated. I can provide config examples if that will help, but >> at this stage I''m thinking it may be a bug and not wrong >> configuration. I may be wrong though :) >> Thanks. >> _______________________________________________ >> Xen-users mailing list >> Xen-users@lists.xensource.com >> http://lists.xensource.com/xen-users > > > -- > Stephan Seitz > Senior System Administrator > > *netz-haut* e.K. > multimediale kommunikation > > zweierweg 22 > 97074 würzburg > > fon: +49 931 2876247 > fax: +49 931 2876248 > > web: www.netz-haut.de <http://www.netz-haut.de/> > > registriergericht: amtsgericht würzburg, hra > 5054<s_seitz.vcf>_______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users