[Users] iscsi mpio

Tue Dec 11 13:58:00 UTC 2012

Sorry vered, i meant that i was using this:
ovirt-node-iso-2.5.5-0.1.fc17.iso

What i meant to say was, that i found that the root file system was read
only and was unable to even copy the equallogic driver there.  equallogic
driver needs python 2.6 and refuses to continue otherwise, so there is
many things preventing me from getting it working, far beyond the readonly
file system.

By highly customized, i didn't mean customized from my work, i meant that
that the node version is set up unlike any other linux i have ever seen.
the readonly file systems seem to be set that way on purpose to keep
people like me who know just enough to be dangerous from being... a danger.

JONATHAN HORNE  |  System Administrator  | Skopos Web
<http://www.skopos.us>
e:  jhorne at skopos.us  t:  214.520.4600  f:  214.520.5079

On 12/11/12 12:32 AM, "Vered Volansky" <vered at redhat.com> wrote:

>
>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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