Re: [Users] iscsi mpio
Hi,
I can give you some information on multipathing on RHEV-H, as I don't
have ovirt-node installed at the moment.
Multipath packages are installed on the hypervisor, but vdsm overwrites
multipath.conf.
To prevent this you have to set the following tags:
# RHEV REVISION 0.7
# RHEV PRIVATE
Search for MPATH_CONF_TAG in multipath.py file to get correct RHEV REVISION number.
After changing multipath.conf to fit your needs make it persistent for
reboots:
# persist /etc/multipath.conf
You can check multipath status with:
# multipath -ll
mpathb (2222b00015521f5d4) dm-0 Intel,Multi-Flex
size=96G features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=50 status=active
| `- 0:0:0:1 sdb 8:16 active ready running
mpatha (222140001553601d1) dm-1 Intel,Multi-Flex
size=20G features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=50 status=active
| `- 0:0:0:0 sda 8:0 active ready running
I hope this helps.
Don't really know if the tags are the same in oVirt, as I don't have a working
oVirt setup at the moment.
--
Best Regards,
DI (FH) René Koch
Senior Solution Architect
============================================
ovido gmbh - "Das Linux Systemhaus"
Brünner Straße 163, A-1210 Wien
Phone: +43 720 / 530 670
Mobile: +43 660 / 512 21 31
E-Mail: r.koch(a)ovido.at
============================================
On Fri, 2012-12-07 at 13:55 +0000, Jonathan Horne wrote:
From: Jonathan Horne <jhorne(a)skopos.us>
Date: Thursday, December 6, 2012 1:04 PM
To: users <users(a)ovirt.org>
Subject: [Users] iscsi mpio
Hello,
I just rebooted my iscsi SAN and the ovirt node 2.5.5fc17 did not
enjoy that one bit. Does ovirt node support multi path i/o? Any
information about this would be greatly appreciated.
Thanks,
jonathan
I attempted to install the multi path driver on node 2.5.5-0.fc17, but
the file system is read only and i can't make changes.
I really need to find out about multipathing, because yesterday i
upgraded the firmware on my iscsi SAN yesterday, and one of my nodes
freaked out and rebooted (oddly, the other 2 didn't). In understand
there may already be multi path configured within the node, but how do
i verify it with my set up?
Thanks,
jonathan
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