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<div class="">On 30 Sep 2017, at 20:18, Ben Bradley <<a href="mailto:listsbb@virtx.net" class="">listsbb@virtx.net</a>> wrote:</div>
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<div class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">On
28/09/17 22:27, Ben Bradley wrote:</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">
<blockquote type="cite" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">
On 28/09/17 08:32, Yaniv Kaul wrote:<br class="">
<blockquote type="cite" class=""><br class="">
<br class="">
On Wed, Sep 27, 2017 at 10:59 PM, Ben Bradley <<a href="mailto:listsbb@virtx.net" class="">listsbb@virtx.net</a> <<a href="mailto:listsbb@virtx.net" class="">mailto:listsbb@virtx.net</a>>> wrote:<br class="">
<br class="">
Hi All<br class="">
<br class="">
I'm looking to add a new host to my oVirt lab installation.<br class="">
I'm going to share out some LVs from a separate box over iSCSI and<br class="">
will hook the new host up to that.<br class="">
I have 2 NICs on the storage host and 2 NICs on the new Ovirt host<br class="">
to dedicate to the iSCSI traffic.<br class="">
I also have 2 separate switches so I'm looking for redundancy here.<br class="">
Both iSCSI host and oVirt host plugged into both switches.<br class="">
<br class="">
If this was non-iSCSI traffic and without oVirt I would create<br class="">
bonded interfaces in active-backup mode and layer the VLANs on top<br class="">
of that.<br class="">
<br class="">
But for iSCSI traffic without oVirt involved I wouldn't bother with<br class="">
a bond and just use multipath.<br class="">
<br class="">
From scanning the oVirt docs it looks like there is an option to<br class="">
have oVirt configure iSCSI multipathing.<br class="">
<br class="">
<br class="">
Look for iSCSI bonding - that's the feature you are looking for.<br class="">
</blockquote>
Thanks for the replies.<br class="">
By iSCSI bonding, do you mean the oVirt feature "iSCSI multipathing" as mentioned here
<a href="https://www.ovirt.org/documentation/admin-guide/chap-Storage/" class="">
https://www.ovirt.org/documentation/admin-guide/chap-Storage/</a> ?<br class="">
Separate links seems to be the consensus then. Since these are links dedicated to iSCSI traffic, not shared. the ovirtmgmt bridge lives on top of an active-backup bond on other NICs.<br class="">
Thanks, Ben<br class="">
</blockquote>
<br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">
<span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">And
an extra question about oVirt's iSCSI multipathing - should each path be a separate VLAN+subnet?</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">
<span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">I
assume it should be separate VLANs for running separate physical fabrics if desired.</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">
<br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">
<span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">Thanks,
Ben</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">
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<div>Take a look at this Ben:</div>
<div><a href="https://bugzilla.redhat.com/show_bug.cgi?id=1474904" class="">https://bugzilla.redhat.com/show_bug.cgi?id=1474904</a></div>
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<div>oVirt is a little bit different with iSCSI MPIO.</div>
<br class="">
<blockquote type="cite" class="">
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<blockquote type="cite" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">
<blockquote type="cite" class=""> So what's the best/most-supported option for oVirt?<br class="">
Manually create active-backup bonds so oVirt just sees a single<br class="">
storage link between host and storage?<br class="">
Or leave them as separate interfaces on each side and use oVirt's<br class="">
multipath/bonding?<br class="">
<br class="">
Also I quite like the idea of using IPv6 for the iSCSI VLAN, purely<br class="">
down to the fact I could use link-local addressing and not have to<br class="">
worry about setting up static IPv4 addresses or DHCP. Is IPv6 iSCSI<br class="">
supported by oVirt?<br class="">
<br class="">
<br class="">
No, we do not. There has been some work in the area[1], but I'm not sure it is complete.<br class="">
Y.<br class="">
<br class="">
[1] <a href="https://gerrit.ovirt.org/#/q/status:merged+project:vdsm+branch:master+topic:ipv6-iscsi-target-support" class="">
https://gerrit.ovirt.org/#/q/status:merged+project:vdsm+branch:master+topic:ipv6-iscsi-target-support</a><span class="Apple-converted-space"> </span><br class="">
<br class="">
<br class="">
Thanks, Ben<br class="">
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