Wido wrote: > Hello, > > Last night i had the idea of building a multipath iSCSI setup with > DRBD in Primary/Primary. > > My idea was/is: > > I have two machines with a 30GB partition wich is synced via DRBD (i > assume everybody here is familiar with DRBD). > > My DRBD is running fine both machines are UpToDate and they are both > primary. > > On top of /dev/drbd0 i made a LVM VG with the name "data", in this VG > i created 3 LV's with a size of 5GB. > > For this e-mail i'll call the machines target1, target2 and iscsi- > initiator > > target1: 192.168.5.199 > target2: 192.168.5.200 > iscsi-initiator: 192.168.5.198 > > On both the targets i have created the folling ietd.conf: > > Target iqn.2007-04.nl.pcextreme:ha > Lun 0 Path=/dev/data/lun0,Type=fileio > Lun 1 Path=/dev/data/lun1,Type=fileio > Lun 2 Path=/dev/data/lun2,Type=fileio > > So both targets have the same IQN and i tried to create a multipath > from the client to both tartgets: > > iscsiadm -m discovery -t sendtargets -p 192.168.5.199 > iscsiadm -m discovery -t sendtargets -p 192.168.5.200 > iscsiadm -m node -T iqn.2007-04.nl.pcextreme:ha -p 192.168.5.199 -- > login > iscsiadm -m node -T iqn.2007-04.nl.pcextreme:ha -p 192.168.5.200 -- > login > > This works and i get a total of 6 new SCSI devices, but multipath > won't recognize them as a redundant path: > > r...@iscsi-client:~# multipath -ll > 149455400000000000000000001000000595800000f000000dm-3 IET ,VIRTUAL- > DISK > [size=5.0G][features=0][hwhandler=0] > \_ round-robin 0 [prio=1][active] > \_ 5:0:0:0 sde 8:64 [active][ready] > 149455400000000000000000001000000dd3c00000e000000dm-0 IET ,VIRTUAL- > DISK > [size=5.0G][features=0][hwhandler=0] > \_ round-robin 0 [prio=1][active] > \_ 4:0:0:1 sdc 8:32 [active][ready] > 149455400000000000000000001000000925800000f000000dm-5 IET ,VIRTUAL- > DISK > [size=5.0G][features=0][hwhandler=0] > \_ round-robin 0 [prio=1][active] > \_ 5:0:0:2 sdg 8:96 [active][ready] > 149455400000000000000000001000000655800000f000000dm-4 IET ,VIRTUAL- > DISK > [size=5.0G][features=0][hwhandler=0] > \_ round-robin 0 [prio=1][active] > \_ 5:0:0:1 sdf 8:80 [active][ready] > 149455400000000000000000001000000a03c00000e000000dm-1 IET ,VIRTUAL- > DISK > [size=5.0G][features=0][hwhandler=0] > \_ round-robin 0 [prio=1][active] > \_ 4:0:0:0 sdb 8:16 [active][ready] > 149455400000000000000000001000000193d00000e000000dm-2 IET ,VIRTUAL- > DISK > [size=5.0G][features=0][hwhandler=0] > \_ round-robin 0 [prio=1][active] > \_ 4:0:0:2 sdd 8:48 [active][ready] > r...@iscsi-client:~# > > Is this a target issue because the "sessions" are not synchronized > between both targets? Or is this related to Open-iSCSI and multipath? >
multipath does not use any iscsi info like targetname or portal to build the multipath device. It just uses something like scsi vpd page info. I think in your ietd.conf you will want to use the ScsiId or ScsiSN setting in the Path line. > Target iqn.2007-04.nl.pcextreme:ha > Lun 0 Path=/dev/data/lun0,Type=fileio,scsi_id=some-uuid1 > Lun 1 Path=/dev/data/lun1,Type=fileio,scsi_id=some-uuid2 > Lun 2 Path=/dev/data/lun2,Type=fileio,scsi_id=some-uuid3 Then in the other target box have the scsi_id uuids match up. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to open-iscsi@googlegroups.com To unsubscribe from this group, send email to open-iscsi+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/open-iscsi -~----------~----~----~----~------~----~------~--~---
