Hi Stevan,
I saw this in some examples, but somehow it just don't work for me :
# /sbin/scsi_id -g -s /block/emcpowerf
Cannot find sysfs device associated with /sys/block/emcpowerf
#
Weird.. A guy from EMC just sent me something that will fit just perfect. I'll share with the entire list.
Regards,
--- On Mon, 4/27/09, Stevan Colaco <stevan.colaco@xxxxxxxxx> wrote:
> From: Stevan Colaco <stevan.colaco@xxxxxxxxx>
> Subject: Re: Persistent naming with UDEV and EMC's Powerpath
> To: "linux clustering" <linux-cluster@xxxxxxxxxx>
> Date: Monday, April 27, 2009, 8:52 AM
> Hello,
>
> There are different ways one may write the persistent
> naming udev rules.
>
> Instead of SYSFS{serial}, it would be better if you can use
> scsi_id
>
> first try to get the scsi id of the quorum device
>
> #/sbin/scsi_id -g -s /block/emcpowerf
>
> you should receive a lengthy number.
>
> Then you can use the rule something like below
>
> [root@node-a RSM]# cat 75-quorum.rules
> KERNEL=="emcpower[a-z]1, PROGRAM=="/sbin/scsi_id -g -s
> /block/emcpowerf", RESULT=="Paste the output of scsi_id
> here" SYMLINK+="discodequorum"
>
>
> regards,
> -Steve
>
> [root@node-a RSM]#
>
> ----- Original Message -----
> From: "Roberto Fratelli" <robertofratelli@xxxxxxxxx>
> To: linux-cluster@xxxxxxxxxx
> Sent: Monday, April 27, 2009 4:17:47 PM GMT +03:00 Iraq
> Subject: Persistent naming with UDEV and
> EMC's Powerpath
>
>
> Hello everyone !
>
> I'm trying to set up a quorum disk in a 2-node redhat
> cluster (RHEL 4.7). Both nodes are attached to a SAN
> Clariion over qlogic HBA's and i'm using EMC's powerpath.
>
> The problem i'm facing is that the disks's device names are
> different across the nodes. For example, the lun i elected
> to be my quorum disk is called '/dev/emcpowerf' at node-a
> and '/dev/emcpowerd' at node-b, so i can't use the device
> name (/dev/emcpowerXX) in my cluster.conf file. In a attempt
> to overcome this i've tried to use the disk label instead :
>
> <quorumd label="97196ef0-da2f-4b79-a5c5-999dce70d677"
> interval="2" tko="10" votes="1"/>
>
> But did not work also, because this way it finds
> '/dev/sdXX' before '/dev/emcpowerXX':
>
> root@node-a:~ # cman_tool nodes
> Node Votes Exp Sts Name
> 0 1
> 0 M /dev/sdf1
> 1 1
> 2 M node-a
> 2 1
> 2 M node-b
> root@node-a:~ #
>
>
> Since this '/dev/sdf' is just one of the paths i have under
> powerpath (it has 4 paths per HBA, 8 paths per lun total) i
> can't keep it this way because in a event of lun trespass
> (clariion does it very often) i would loose quorum. My
> understanding is that i need some kind of "persistent
> binding" so i can use Powerpath's pseudo-device
> '/dev/emcpowerXX', so i tried to create a UDEV rule like
> this:
>
> [root@node-a RSM]# cat 75-quorum.rules
> KERNEL=="emcpower[a-z]1,
> SYSFS{label}=="97196ef0-da2f-4b79-a5c5-999dce70d677",
> SYMLINK+="discodequorum%n"
> [root@node-a RSM]#
>
>
> Which did not worked, i think because UDEV starts way
> before powerpath. Does anyone here faced this problem before
> ? how can i keep the device names persistent across the
> nodes (at least for the quorum disk) ?
>
>
> Below some more info on my quorum's disk:
>
>
> root@node-a:~ # mkqdisk -L
> mkqdisk v0.5.2
> /dev/sdf1:
> Magic:
> eb7a62c2
> Label:
>
> 97196ef0-da2f-4b79-a5c5-999dce70d677
> Created:
> Mon Dec 24 11:47:11 2007
> Host:
> node-a
> Kernel Sector
> Size: 512
>
> /dev/sdo1:
> Magic:
> eb7a62c2
> Label:
>
> 97196ef0-da2f-4b79-a5c5-999dce70d677
> Created:
> Mon Dec 24 11:47:11 2007
> Host:
> node-a
> Kernel Sector
> Size: 512
>
> /dev/sdx1:
> Magic:
> eb7a62c2
> Label:
>
> 97196ef0-da2f-4b79-a5c5-999dce70d677
> Created:
> Mon Dec 24 11:47:11 2007
> Host:
> node-a
> Kernel Sector
> Size: 512
>
> /dev/sdag1:
> Magic:
> eb7a62c2
> Label:
>
> 97196ef0-da2f-4b79-a5c5-999dce70d677
> Created:
> Mon Dec 24 11:47:11 2007
> Host:
> node-a
> Kernel Sector
> Size: 512
>
> /dev/sdap1:
> Magic:
> eb7a62c2
> Label:
>
> 97196ef0-da2f-4b79-a5c5-999dce70d677
> Created:
> Mon Dec 24 11:47:11 2007
> Host:
> node-a
> Kernel Sector
> Size: 512
>
> /dev/sday1:
> Magic:
> eb7a62c2
> Label:
>
> 97196ef0-da2f-4b79-a5c5-999dce70d677
> Created:
> Mon Dec 24 11:47:11 2007
> Host:
> node-a
> Kernel Sector
> Size: 512
>
> /dev/sdbh1:
> Magic:
> eb7a62c2
> Label:
>
> 97196ef0-da2f-4b79-a5c5-999dce70d677
> Created:
> Mon Dec 24 11:47:11 2007
> Host:
> node-a
> Kernel Sector
> Size: 512
>
> /dev/sdbq1:
> Magic:
> eb7a62c2
> Label:
>
> 97196ef0-da2f-4b79-a5c5-999dce70d677
> Created:
> Mon Dec 24 11:47:11 2007
> Host:
> node-a
> Kernel Sector
> Size: 512
>
> /dev/emcpowerf1:
> Magic:
> eb7a62c2
> Label:
>
> 97196ef0-da2f-4b79-a5c5-999dce70d677
> Created:
> Mon Dec 24 11:47:11 2007
> Host:
> node-a
> Kernel Sector
> Size: 512
>
> root@node-a:~ #
>
>
>
> [root@node-b ~]# mkqdisk -L
> mkqdisk v0.5.2
> /dev/sdf1:
> Magic:
> eb7a62c2
> Label:
>
> 97196ef0-da2f-4b79-a5c5-999dce70d677
> Created:
> Mon Dec 24 11:47:11 2007
> Host:
> node-a
> Kernel Sector
> Size: 512
>
> /dev/sdo1:
> Magic:
> eb7a62c2
> Label:
>
> 97196ef0-da2f-4b79-a5c5-999dce70d677
> Created:
> Mon Dec 24 11:47:11 2007
> Host:
> node-a
> Kernel Sector
> Size: 512
>
> /dev/sdx1:
> Magic:
> eb7a62c2
> Label:
>
> 97196ef0-da2f-4b79-a5c5-999dce70d677
> Created:
> Mon Dec 24 11:47:11 2007
> Host:
> node-a
> Kernel Sector
> Size: 512
>
> /dev/sdag1:
> Magic:
> eb7a62c2
> Label:
>
> 97196ef0-da2f-4b79-a5c5-999dce70d677
> Created:
> Mon Dec 24 11:47:11 2007
> Host:
> node-a
> Kernel Sector
> Size: 512
>
> /dev/sdap1:
> Magic:
> eb7a62c2
> Label:
>
> 97196ef0-da2f-4b79-a5c5-999dce70d677
> Created:
> Mon Dec 24 11:47:11 2007
> Host:
> node-a
> Kernel Sector
> Size: 512
>
> /dev/sday1:
> Magic:
> eb7a62c2
> Label:
>
> 97196ef0-da2f-4b79-a5c5-999dce70d677
> Created:
> Mon Dec 24 11:47:11 2007
> Host:
> node-a
> Kernel Sector
> Size: 512
>
> /dev/sdbh1:
> Magic:
> eb7a62c2
> Label:
>
> 97196ef0-da2f-4b79-a5c5-999dce70d677
> Created:
> Mon Dec 24 11:47:11 2007
> Host:
> node-a
> Kernel Sector
> Size: 512
>
> /dev/sdbq1:
> Magic:
> eb7a62c2
> Label:
>
> 97196ef0-da2f-4b79-a5c5-999dce70d677
> Created:
> Mon Dec 24 11:47:11 2007
> Host:
> node-a
> Kernel Sector
> Size: 512
>
> /dev/emcpowerd1:
> Magic:
> eb7a62c2
> Label:
>
> 97196ef0-da2f-4b79-a5c5-999dce70d677
> Created:
> Mon Dec 24 11:47:11 2007
> Host:
> node-a
> Kernel Sector
> Size: 512
>
> [root@node-b ~]#
>
>
>
>
> --
> Linux-cluster mailing list
> Linux-cluster@xxxxxxxxxx
> https://www.redhat.com/mailman/listinfo/linux-cluster
>
> --
> Linux-cluster mailing list
> Linux-cluster@xxxxxxxxxx
> https://www.redhat.com/mailman/listinfo/linux-cluster
>
--
Linux-cluster mailing list
Linux-cluster@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/linux-cluster
