Re: Need help with shared storage over Qlogic FC

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Mike Sponsler <msponsler <at> gmail.com> writes:

> 
> I'm having some trouble getting shared storage to work with LIO/targetcli
> 
> This is my first time using this, so I'm learning a lot!  But I'm stuck.
> 
> I've got a single server running LIO as the SCSI target over a 4GB FC
> (Qlogi 24xx HBA) that I am attempting to share to 3x servers over the
> FC SAN (all Qlogic 24xx HBA)
> 
> I have a Linux LVM target setup, and shared with ACL.  I can access
> the LUN over the SAN from one of the servers:
> 
> SCSI Target:
> [root <at> storage /]# targetcli
> targetcli shell version 2.1.fb35
> Copyright 2011-2013 by Datera, Inc and others.
> For help on commands, type 'help'.
> 
> /> ls
> o- / 
............................................................................
.............................................
> [...]
>   o- backstores
> 
............................................................................
..................................
> [...]
>   | o- block 
............................................................................
......................
> [Storage Objects: 1]
>   | | o- VOE .............................................................
> [/dev/SANVolGroup00/VOEvol (1.0TiB) write-thru activated]
>   | o- fileio 
............................................................................
.....................
> [Storage Objects: 0]
>   | o- pscsi 
............................................................................
......................
> [Storage Objects: 0]
>   | o- ramdisk 
............................................................................
....................
> [Storage Objects: 0]
>   o- iscsi 
............................................................................
................................
> [Targets: 0]
>   o- loopback 
............................................................................
.............................
> [Targets: 0]
>   o- qla2xxx 
............................................................................
..............................
> [Targets: 2]
>   | o- naa.2100001b3207881f
> 
............................................................................
.................
> [gen-acls]
>   | | o- acls 
............................................................................
................................
> [ACLs: 3]
>   | | | o- naa.2100001b320e9121
> 
............................................................................
.......
> [Mapped LUNs: 1]
>   | | | | o- mapped_lun0
> 
............................................................................
.........
> [lun0 block/VOE (rw)]
>   | | | o- naa.2100001b320edb20
> 
............................................................................
.......
> [Mapped LUNs: 1]
>   | | | | o- mapped_lun0
> 
............................................................................
.........
> [lun0 block/VOE (rw)]
>   | | | o- naa.2100001b328b9cd8
> 
............................................................................
.......
> [Mapped LUNs: 1]
>   | | |   o- mapped_lun0
> 
............................................................................
.........
> [lun0 block/VOE (rw)]
>   | | o- luns 
............................................................................
................................
> [LUNs: 1]
>   | |   o- lun0
> 
............................................................................
> [block/VOE (/dev/SANVolGroup00/VOEvol)]
>   | o- naa.2100001b3207d41e
> 
............................................................................
.................
> [gen-acls]
>   |   o- acls 
............................................................................
................................
> [ACLs: 3]
>   |   | o- naa.2101001b322e9121
> 
............................................................................
.......
> [Mapped LUNs: 1]
>   |   | | o- mapped_lun0
> 
............................................................................
.........
> [lun0 block/VOE (rw)]
>   |   | o- naa.2101001b322edb20
> 
............................................................................
.......
> [Mapped LUNs: 1]
>   |   | | o- mapped_lun0
> 
............................................................................
.........
> [lun0 block/VOE (rw)]
>   |   | o- naa.2101001b32ab9cd8
> 
............................................................................
.......
> [Mapped LUNs: 1]
>   |   |   o- mapped_lun0
> 
............................................................................
.........
> [lun0 block/VOE (rw)]
>   |   o- luns 
............................................................................
................................
> [LUNs: 1]
>   |     o- lun0
> 
............................................................................
> [block/VOE (/dev/SANVolGroup00/VOEvol)]
>   o- sbp 
............................................................................
..................................
> [Targets: 0]
>   o- vhost 
............................................................................
................................
> [Targets: 0]
> />
> 
> I'm using multipath!  Server one sees the two devices properly, and
> creates the multipath device:
> 
> mpatha (36001405a04c6148b87f4969998829d32) dm-4 LIO-ORG ,VOE
> size=1.0T features='0' hwhandler='0' wp=rw
> |-+- policy='service-time 0' prio=0 status=active
> | `- 14:0:1:0 sdc 8:32 active undef running
> `-+- policy='service-time 0' prio=0 status=enabled
>   `- 15:0:0:0 sdb 8:16 active undef running
> 
> I'm not getting access to the LUN on the other servers:
> 
> [root <at> compute2 ~]# multipath -r
> Jun 09 23:59:47 | mpatha: ignoring map
> 
> I don't see the devices, sdc or sdb listed in the multipath
> information....so it can't create the multipath device on the other
> two nodes.
> 
> I'm thinking that since the first initiator has SCSI reservation, the
> two other can't get access.
> 
> How do I enable shared storage so all three devices can read/write to
> the device?  Yes, I'm planning on using a cluster to manage the shared
> storage access.
> 
> Thanks in advanced.
> 
> --
> Mike Sponsler
> msponsler at gmail.com
> 

Can anyone offer some assistance?  I can't find any documentation on how to 
configure shared storage at the target over fiber channel.

Only one of my nodes can get access to the target.

Thanks.

--
Mike Sponsler

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