[Users] iscsi mpio

Tue Dec 11 06:32:45 UTC 2012

You previously mentioned you're using package 2.5.5-0.fc17.
It looks like you have a typo, so please resend the exact package of ovirt-node you're using.
Also - Where did you get the package from?
We'd like to try and reproduce here.

Did you make any changes to mount so that /var is now Read Only?

Please send us the output for the mount command on your system.

Please remember to reply-to-all next time(s)...

Thanks,
Vered

----- Original Message -----
> From: "Jonathan Horne" <jhorne at skopos.us>
> To: "Vered Volansky" <vered at redhat.com>
> Sent: Monday, December 10, 2012 4:24:05 PM
> Subject: Re: [Users] iscsi mpio
> 
> Im using the ovirt node which is a prebuilt appliance-like version of
> ovirt.
> 
> It is highly customized, and is not open to alteration. (to do so
> would be
> quite a bit of work).
> 
> JONATHAN HORNE  |  Systems Administrator  | Skopos Web
> <http://www.skopos.us/>
> e:  jhorne at skopos.us  t:  (972) 520-5042  f:  (214) 520-5079
> 
> 
> 
> 
> 
> 
> On 12/10/12 6:46 AM, "Vered Volansky" <vered at redhat.com> wrote:
> 
> >Hi Jonathan,
> >
> >I'm trying to understand the context for your problem.
> >
> >As I understand it, your problem stems from the fact that you're
> >working
> >on a Read Only fs, long before the multipath issue.
> >So you have root permissions on an RO fs?
> >How come? Why is it RO to begin with?
> >Are you working on RHEVM?
> >Which OS, version?
> >
> >Maybe we can be of more help if we better understand the context.
> >
> >Thanks,
> >Vered
> >
> >
> >----- Original Message -----
> >> From: "Jonathan Horne" <jhorne at skopos.us>
> >> To: users at ovirt.org
> >> Sent: Friday, December 7, 2012 7:09:08 PM
> >> Subject: Re: [Users] iscsi mpio
> >>
> >> Im using a Equallogic iscsi SAN, and it has a special multi path
> >> driver
> >> because it uses a virtual IP for the initiator to log into, and
> >> the
> >> actual
> >> traffic ip addresses are not exposed to the initiator.
> >>
> >> I tried to install the rpm but as far as i can get is:
> >>
> >> [root at vmnode02 x86_64]# rpm -Uvh
> >> equallogic-host-tools-1.2.0-2.el6.x86_64.rpm --nodeps
> >> warning: equallogic-host-tools-1.2.0-2.el6.x86_64.rpm: Header V4
> >> DSA/SHA1
> >> Signature, key ID 84fd3ef3: NOKEY
> >> error: can't create transaction lock on /var/lib/rpm/.rpm.lock
> >> (Read-only
> >> file system)
> >>
> >> Is there a way to unlock the file system so i can try to install
> >> and
> >> configure this driver?
> >>
> >>
> >> This is the current output of multipath -ll on my node:
> >>
> >> [root at vmnode02 x86_64]# multipath -ll
> >> 36019cb3131d6f276d80a45bb6501f0c9 dm-10
> >> size=500G features='0' hwhandler='0' wp=rw
> >> 36001e4f03dd42300183eaac404afd5ce dm-0 DELL,PERC 6/i
> >> size=279G features='0' hwhandler='0' wp=rw
> >> `-+- policy='round-robin 0' prio=1 status=active
> >>   `- 2:2:0:0 sda 8:0 active ready running
> >>
> >>
> >>
> >> The EQ san does show only 1 single tcp connection into the LUN, so
> >> i
> >> know
> >> its not multipathing at this time.  This will be a huge downer if
> >> i
> >> have
> >> to go to production without multi path support.
> >>
> >> Is there anything i can do here?
> >>
> >>
> >>
> >>
> >>
> >> On 12/7/12 8:42 AM, "René Koch (ovido)" <r.koch at ovido.at> wrote:
> >>
> >> >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 at ovido.at
> >> >============================================
> >> >
> >> >
> >> >On Fri, 2012-12-07 at 13:55 +0000, Jonathan Horne wrote:
> >> >>
> >> >>
> >> >> From: Jonathan Horne <jhorne at skopos.us>
> >> >> Date: Thursday, December 6, 2012 1:04 PM
> >> >> To: users <users at 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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> >> >
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> >>
> >>
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> 
> ________________________________
> This is a PRIVATE message. If you are not the intended recipient,
> please delete without copying and kindly advise us by e-mail of the
> mistake in delivery. NOTE: Regardless of content, this e-mail shall
> not operate to bind SKOPOS to any order or other contract unless
> pursuant to explicit written agreement or government initiative
> expressly permitting the use of e-mail for such purpose.
> 