On Tue, 2013-04-09 at 13:59 +0200, Gianluca Cecchi wrote:
On Tue, Apr 9, 2013 at 1:56 PM, René Koch (ovido) wrote:
Hi Gianluca,
On Tue, 2013-04-09 at 12:50 +0200, Gianluca Cecchi wrote:
Hello,
I have the chance to work on Intel blades where I have option to
confihure shared disks between them at enclosure level.
Their controller is scsi.
How could I configure as shared storage in ovirt?
I presume neither Fc nor iscsi are possible. .. so what can i do in
your opinion?
Is this an Intel modular server, btw?
If yes - create a Fibre channel datacenter and add the storage as FC
LUNs. I can also send you a working multipath.conf for Intel Modular if
required...
Regards,
René
Yes, it is an Intel modular server (I don't know well this platform
but I think IMS is its acronym)
You can contact me if you have questions regarding these server - I
use(d) this system in the company I worked before and on customer side.
The multipath working configuration would be more than appreciated ;-)
But does this mean there are configuration with dual scsi or is
multipath needed in every case (as I see oVirt config implies
multipath configuration anyway.)
Attached is a working multipath.conf for RHEV-H 3.0.
You need a working multipath.conf file if you have redundant storage
controllers.
Find out the wwids of your devices and add them to your
blacklist_exceptions section.
# multipath -ll
mpathb (b00015521f5d4) 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
Don't forget to persist /etc/multipath.conf if you're using ovirt-node!
With this config you don't need the Intel multipath drivers, btw.
Please let me know if you have further questions.
Gianluca
# RHEV REVISION 0.7
# RHEV PRIVATE
defaults {
udev_dir/dev
polling_interval10
path_selector round-robin 0
path_grouping_policymultibus
getuid_callout /lib/udev/scsi_id --whitelisted
--device=/dev/%n
prioalua
path_checkerreadsector0
rr_min_io 100
max_fds 8192
rr_weight priorities
failbackimmediate
no_path_retry fail
user_friendly_names yes
}
blacklist {
wwid 26353900f02796769
devnode ^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*
devnode ^hd[a-z]
}
blacklist_exceptions {
wwid b00015521f5d4
wwid 222140001553601d1
}
devices {
device {
vendor Intel
product Multi-Flex
path_grouping_policygroup_by_prio
getuid_callout /lib/udev/scsi_id --whitelisted
--device=/dev/%n
priotpg_pref
path_checkertur
path_selector round-robin 0
hardware_handler1 alua
failbackimmediate
rr_weight uniform
rr_min_io 100
no_path_retry queue
features1 queue_if_no_path
product_blacklist VTrak V-LUN
}
}
multipaths {
multipath {
uid 0
alias mpatha
gid 0
wwid 222140001553601d1
mode 0600
}
multipath {
uid 0
alias mpathb
gid 0
wwid b00015521f5d4
mode 0600
}
}___
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