HI All, I try to configure multipath by export two iscsi gateway on two host with same one rbd volume, The steps is below: one host1: 1) mapped a rbd volume as a local blockdevice rbd map fastpool/vdisk as /dev/rbd0 2) export /dev/rbd0 as iscsi taget: [root@zk23-03 ~]# targetcli / ls o- / ......................................................................................................................... [...] o- backstores .............................................................................................................. [...] | o- block .................................................................................................. [Storage Objects: 1] | | o- fastpool_vdisk ................................................................ [/dev/rbd0 (195.3GiB) write-thru activated] | o- fileio ................................................................................................. [Storage Objects: 0] | o- pscsi .................................................................................................. [Storage Objects: 0] | o- ramdisk ................................................................................................ [Storage Objects: 0] o- iscsi ............................................................................................................ [Targets: 1] | o- iqn.2016-05.com.zettakit.www:fastpool.vdisk ....................................................................... [TPGs: 1] | o- tpg1 ............................................................................................... [no-gen-acls, no-auth] | o- acls .......................................................................................................... [ACLs: 1] | | o- iqn.2016-05.com.zettakit:node2202.local1 ............................................................. [Mapped LUNs: 1] | | o- mapped_lun0 ........................................................................ [lun0 block/fastpool_vdisk (rw)] | o- luns .......................................................................................................... [LUNs: 1] | | o- lun0 ............................................................................... [block/fastpool_vdisk (/dev/rbd0)] | o- portals .................................................................................................... [Portals: 0] o- loopback ......................................................................................................... [Targets: 0] o- srpt ............................................................................................................. [Targets: 0] one host2, do the same: one host1: 1) mapped a rbd volume as a local blockdevice rbd map fastpool/vdisk as /dev/rbd0 2) export /dev/rbd0 as iscsi taget: [root@zk23-01 ~]# targetcli / ls o- / ......................................................................................................................... [...] o- backstores .............................................................................................................. [...] | o- block .................................................................................................. [Storage Objects: 1] | | o- fastpool_vdisk ................................................................ [/dev/rbd0 (195.3GiB) write-thru activated] | o- fileio ................................................................................................. [Storage Objects: 0] | o- pscsi .................................................................................................. [Storage Objects: 0] | o- ramdisk ................................................................................................ [Storage Objects: 0] o- iscsi ............................................................................................................ [Targets: 1] | o- iqn.2016-05.com.zettakit.www:fastpool.vdisk ....................................................................... [TPGs: 1] | o- tpg1 ............................................................................................... [no-gen-acls, no-auth] | o- acls .......................................................................................................... [ACLs: 1] | | o- iqn.2016-05.com.zettakit:node2202.local1 ............................................................. [Mapped LUNs: 1] | | o- mapped_lun0 ........................................................................ [lun0 block/fastpool_vdisk (rw)] | o- luns .......................................................................................................... [LUNs: 1] | | o- lun0 ............................................................................... [block/fastpool_vdisk (/dev/rbd0)] | o- portals .................................................................................................... [Portals: 0] o- loopback ......................................................................................................... [Targets: 0] o- srpt ............................................................................................................. [Targets: 0] After building connection to the two targets by iscsi-initiator, it will have two iscsi dev: /dev/sdm and /dev/sdn, but the multipath doesn't recognize it was same device. By leaning multipath , I know it will use scsi_id to recognize as the same device, how to use targetcli to export a rbd volume with the same scsi_id ? _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com