topic Re: EVA8000 and Redhat Linux Cluster in HPE EVA Storage

EVA8000 and Redhat Linux Cluster

Sureshbabu-HP — Thu, 23 Oct 2008 05:53:33 GMT

Hi,

I have been facing some issues while trying to setup Redhat Linux Cluster with EVA 8000 as the storage.

The storage admin has allocated 2 VDisks to the Redhat Cluster nodes. While trying to set the I/O fencing using SCSI Reservation, I found that the nodes when running fence testing I found all both my disks had failed for fencing

[root@sircnod01 ~]# fence_scsi_test -s

Testing all SCSI block devices...

Attempted to register with devices:
-------------------------------------
/dev/sdp Failure
/dev/sdo Failure
/dev/sdn Failure
/dev/sdm Failure
/dev/sdl Failure
/dev/sdk Failure
/dev/sdj Failure
/dev/sdi Failure
/dev/sdh Failure
/dev/sdg Failure
/dev/sdf Failure
/dev/sde Failure
/dev/sdd Failure
/dev/sdc Failure
/dev/sdb Failure
/dev/sda Failure
-------------------------------------
Number of devices tested: 16
Number of devices passed: 0
Number of devices failed: 16

Due to multipathing we see here 16 paths, which in reality is just 2 LUNS.

I asked my Storage admin, but he has no idea of SCSI Reservation settings on EVA8000.

Please help me with this

thanks,

Suresh

Re: EVA8000 and Redhat Linux Cluster

IBaltay — Thu, 23 Oct 2008 06:01:24 GMT

Hi,
maybe you should install the multipathing first:
see this thread pls:
http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1279428

Re: EVA8000 and Redhat Linux Cluster

Sureshbabu-HP — Thu, 23 Oct 2008 06:23:18 GMT

Hi lBaltay,

I checked on Redhat and found that mulitpathing devices will not be used for fencing.

regards,

Suresh

Re: EVA8000 and Redhat Linux Cluster

Chris Rosan2 — Fri, 24 Oct 2008 04:50:06 GMT

Suresh,

I was running redhat cluster with EVA and when i fenced the devices i did it through ilo to restart the server.

Does this not suit your setup?

Redhat also has multipathing built into the O/S. You don't necessarily have to install the HP drivers (but i was running them).

Re: EVA8000 and Redhat Linux Cluster

Sureshbabu-HP — Fri, 24 Oct 2008 06:29:47 GMT

Hi,

I know we can fence with iLO and have set it up with that, but if we need to fence using SCSI reservation, like in VCS then how would we make changes to the EVA to make sure that SCSI Reservation is supported.

I have already setup multipathing with Devie-Mapper-Multipath.

thanks for the info