<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Jul 19, 2017 at 9:13 PM, Vinícius Ferrão <span dir="ltr"><<a href="mailto:ferrao@if.ufrj.br" target="_blank">ferrao@if.ufrj.br</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br>
<br>
I’ve skipped this message entirely yesterday. So this is per design? Because the best practices of iSCSI MPIO, as far as I know, recommends two completely separate paths. If this can’t be achieved with oVirt what’s the point of running MPIO?<br></blockquote><div><br></div><div>With regular storage it is quite easy to achieve using 'iSCSI bonding'.</div><div>I think the Dell storage is a bit different and requires some more investigation - or experience with it.</div><div> Y.</div><div><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
May we ask for a bug fix or a feature redesign on this?<br>
<br>
MPIO is part of my datacenter, and it was originally build for running XenServer, but I’m considering the move to oVirt. MPIO isn’t working right and this can be a great no-go for me...<br>
<br>
I’m willing to wait and hold my DC project if this can be fixed.<br>
<br>
Any answer from the redhat folks?<br>
<br>
Thanks,<br>
V.<br>
<div class="HOEnZb"><div class="h5"><br>
> On 18 Jul 2017, at 11:09, Uwe Laverenz <<a href="mailto:uwe@laverenz.de">uwe@laverenz.de</a>> wrote:<br>
><br>
> Hi,<br>
><br>
><br>
> Am 17.07.2017 um 14:11 schrieb Devin Acosta:<br>
><br>
>> I am still troubleshooting the issue, I haven’t found any resolution to my issue at this point yet. I need to figure out by this Friday otherwise I need to look at Xen or another solution. iSCSI and oVIRT seems problematic.<br>
><br>
> The configuration of iSCSI-Multipathing via OVirt didn't work for me either. IIRC the underlying problem in my case was that I use totally isolated networks for each path.<br>
><br>
> Workaround: to make round robin work you have to enable it by editing "/etc/multipath.conf". Just add the 3 lines for the round robin setting (see comment in the file) and additionally add the "# VDSM PRIVATE" comment to keep vdsmd from overwriting your settings.<br>
><br>
> My multipath.conf:<br>
><br>
><br>
>> # VDSM REVISION 1.3<br>
>> # VDSM PRIVATE<br>
>> defaults {<br>
>> polling_interval 5<br>
>> no_path_retry fail<br>
>> user_friendly_names no<br>
>> flush_on_last_del yes<br>
>> fast_io_fail_tmo 5<br>
>> dev_loss_tmo 30<br>
>> max_fds 4096<br>
>> # 3 lines added manually for multipathing:<br>
>> path_selector "round-robin 0"<br>
>> path_grouping_policy multibus<br>
>> failback immediate<br>
>> }<br>
>> # Remove devices entries when overrides section is available.<br>
>> devices {<br>
>> device {<br>
>> # These settings overrides built-in devices settings. It does not apply<br>
>> # to devices without built-in settings (these use the settings in the<br>
>> # "defaults" section), or to devices defined in the "devices" section.<br>
>> # Note: This is not available yet on Fedora 21. For more info see<br>
>> # <a href="https://bugzilla.redhat.com/1253799" rel="noreferrer" target="_blank">https://bugzilla.redhat.com/<wbr>1253799</a><br>
>> all_devs yes<br>
>> no_path_retry fail<br>
>> }<br>
>> }<br>
><br>
><br>
><br>
> To enable the settings:<br>
><br>
> systemctl restart multipathd<br>
><br>
> See if it works:<br>
><br>
> multipath -ll<br>
><br>
><br>
> HTH,<br>
> Uwe<br>
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</div></div></blockquote></div><br></div></div>