12:19 p.m.
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On 05/21/2015 02=3A47 AM=2C Chris Jones - BookIt=2Ecom Systems Administrato=
r
wrote=3A
=3E=3E Another issue may be that the setting for COMPELNT/Compellent Vol ar=
e
=3E=3E wrong=3B
=3E=3E the setting we ship is missing lot of settings that exists in the
=3E=3E builtin
=3E=3E setting=2C and this may have bad effect=2E If your devices match thi=
s =2C I
=3E=3E would
=3E=3E try this multipath configuration=2C instead of the one vdsm configur=
es=2E
=3E=3E
=3E=3E device =7B
=3E=3E vendor =22COMPELNT=22
=3E=3E product =22Compellent Vol=22
=3E=3E path=5Fgrouping=5Fpolicy =22multibus=22
=3E=3E path=5Fchecker =22tur=22
=3E=3E features =220=22
=3E=3E hardware=5Fhandler =220=22
=3E=3E prio =22const=22
=3E=3E failback =22immediate=22
=3E=3E rr=5Fweight =22uniform=22
=3E=3E no=5Fpath=5Fretry fail
=3E=3E =7D
=3E
=3E I wish I could=2E We=27re using the CentOS 7 ovirt-node-iso=2E The
=3E multipath=2Econf is less than ideal but when I tried updating it=2C oVi=
rt
=3E instantly overwrites it=2E To be clear=2C yes I know changes do not
=3E survive reboots and yes I know about persist=2C but it changes it while=
=3E running=2E Live! Persist won=27t help there=2E
=3E
=3E I also tried building a CentOS 7 =22thick client=22 where I set up Cent=
OS
=3E 7 first=2C added the oVirt repo=2C then let the engine provision it=2E=
Same
=3E problem with multipath=2Econf being overwritten with the default oVirt=
=3E setup=2E
=3E
=3E So I tried to be slick about it=2E I made the multipath=2Econf immutabl=
e=2E
=3E That prevented the engine from being able to activate the node=2E It
=3E would fail on a vds command that gets the nodes capabilities and part=
=3E of what it does is reads then overwrites multipath=2Econf=2E
=3E
=3E How do I safely update multipath=2Econf=3F
=3E
Somehow the multipath=2Econf that oVirt generates forces my HDD RAID
controller disks to change from /dev/sdb* and /dev/sdc*=2E So I had to
blacklist these=2E
I was able to persist it by adding =22=23 RHEV PRIVATE=22 right below the=
=22=23
RHEV REVISION 1=2E1=22
Hope this helps
Met vriendelijke groet=2C With kind regards=2C
Jorick Astrego
Netbulae Virtualization Experts=20
----------------
=09Tel=3A 053 20 30 270 =09info=40netbulae=2Eeu =09Staalsteden 4-3A =09KvK=
08198180
=09Fax=3A 053 20 30 271 =09www=2Enetbulae=2Eeu =097547 TA Enschede =09BTW=
NL821234584B01
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=3Chtml=3E
=3Cbody=3E
<br>
<br>
On 05/21/2015 02:47 AM, Chris Jones - BookIt.com Systems Administrator =
<br>
wrote: <br>
<font color=3D"#000000">>> Another issue may be that the
setting for =
COMPELNT/Compellent Vol are </font><br>
<font color=3D"#000000">>>
wrong; </font><br>
<font color=3D"#000000">>> the setting we ship is missing
lot of sett=
ings that exists in the </font><br>
<font color=3D"#000000">>>
builtin </font><br>
<font color=3D"#000000">>> setting, and this may have bad
effect. If =
your devices match this , I </font><br>
<font color=3D"#000000">>>
would </font><br>
<font color=3D"#000000">>> try this multipath configuration,
instead =
of the one vdsm configures. </font><br>
<font color=3D"#000000">>> </font><br>
<font
color=3D"#000000">>>
device { </fon=
t><br>
<font
color=3D"#000000">>> &=
nbsp; vendor "COMPELNT" </font><br>
<font
color=3D"#000000">>> &=
nbsp; product "Compellent Vol" </font><br>
<font
color=3D"#000000">>> &=
nbsp; path_grouping_policy "multibus" </font><br>
<font
color=3D"#000000">>> &=
nbsp; path_checker "tur" </font><br>
<font
color=3D"#000000">>> &=
nbsp; features "0" </font><br>
<font
color=3D"#000000">>> &=
nbsp; hardware_handler "0" </font><br>
<font
color=3D"#000000">>> &=
nbsp; prio "const" </font><br>
<font
color=3D"#000000">>> &=
nbsp; failback "immediate" </font><br>
<font
color=3D"#000000">>> &=
nbsp; rr_weight "uniform" </font><br>
<font
color=3D"#000000">>> &=
nbsp; no_path_retry fail </font><br>
<font
color=3D"#000000">>>
} </font><br>
<font color=3D"#000000">> </font><br>
<font color=3D"#000000">> I wish I could. We're using the
CentOS 7 ovirt=
-node-iso. The </font><br>
<font color=3D"#000000">> multipath.conf is less than ideal but
when I t=
ried updating it, oVirt </font><br>
<font color=3D"#000000">> instantly overwrites it. To be clear, yes
I kn=
ow changes do not </font><br>
<font color=3D"#000000">> survive reboots and yes I know about
persist, =
but it changes it while </font><br>
<font color=3D"#000000">> running. Live! Persist won't help
there. <=
/font><br>
<font color=3D"#000000">> </font><br>
<font color=3D"#000000">> I also tried building a CentOS 7
"thick c=
lient" where I set up CentOS </font><br>
<font color=3D"#000000">> 7 first, added the oVirt repo, then let
the en=
gine provision it. Same </font><br>
<font color=3D"#000000">> problem with multipath.conf being
overwritten =
with the default oVirt </font><br>
<font color=3D"#000000">> setup. </font><br>
<font color=3D"#000000">> </font><br>
<font color=3D"#000000">> So I tried to be slick about it. I made
the mu=
ltipath.conf immutable. </font><br>
<font color=3D"#000000">> That prevented the engine from being able
to a=
ctivate the node. It </font><br>
<font color=3D"#000000">> would fail on a vds command that gets the
node=
s capabilities and part </font><br>
<font color=3D"#000000">> of what it does is reads then overwrites
multi=
path.conf. </font><br>
<font color=3D"#000000">> </font><br>
<font color=3D"#000000">> How do I safely update
multipath.conf? </f=
ont><br>
<font color=3D"#000000">> </font><br>
<br>
Somehow the multipath.conf that oVirt generates forces my HDD RAID <br>
controller disks to change from /dev/sdb* and /dev/sdc*. So I had to <b=
r>
blacklist these. <br>
<br>
I was able to persist it by adding "# RHEV PRIVATE" right below t=
he "# <br>
RHEV REVISION 1.1" <br>
<br>
Hope this helps <br>
<br>
<br>
<br>
=
=3CBR /=3E
=3CBR /=3E
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