<div dir="ltr">We've built them as individual pairs (Edge/Core) and then use DNS to control which one goes where. Without the cluster, we know that Edge1 will always talk to Core1.<div><br></div><div>I get the feeling that clustering was always meant to be in the same DC, and for redundancy purposes in the same DC.</div><div><br></div><div>If you have two DC's, either a cluster at each DC, or just a pair at each DC, depending on the business needs.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Jan 28, 2020 at 8:11 PM Lelio Fulgenzi <<a href="mailto:lelio@uoguelph.ca">lelio@uoguelph.ca</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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How does no. 2 actually solve the problem of having to log back in?
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<div>Is this a supported/suggested deployment method? <br>
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<div>It’s been a while since I first looked at things and don’t recall things mentioning using the cluster name in the SRV records. </div>
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<div>I’m intrigued. And interested!</div>
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<div id="gmail-m_6232252904660164997AppleMailSignature" dir="ltr">
<p class="MsoNormal" style="margin:0in 0in 0.0001pt"><span style="background-color:rgba(255,255,255,0)"><i>-sent from mobile device-</i></span></p>
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<p class="MsoNormal" style="margin:0in 0in 0.0001pt"><span style="background-color:rgba(255,255,255,0)"><b>Lelio Fulgenzi, B.A.</b> | Senior Analyst<u></u><u></u></span></p>
<p class="MsoNormal" style="margin:0in 0in 0.0001pt"><span style="background-color:rgba(255,255,255,0)">Computing and Communications Services | University of Guelph<u></u><u></u></span></p>
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Ext. 56354</a> | <a href="mailto:lelio@uoguelph.ca" target="_blank">lelio@uoguelph.ca</a><u></u><u></u></span></font></p>
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<div dir="ltr"><br>
On Jan 28, 2020, at 9:03 PM, Ryan Huff <<a href="mailto:ryanhuff@outlook.com" target="_blank">ryanhuff@outlook.com</a>> wrote:<br>
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<blockquote type="cite">
<div dir="ltr"><span>1.) It used to be in previous versions that all cluster nodes could technically be active at any time and SRV weights and priorities could influence the path selection but not guarantee it end-to-end when all cluster nodes are up and running.</span><br>
<span></span><br>
<span>I believe this behavior has changed/improved and I think you are supposed to be able to control that now with SRV weights and priorities, but I could be wrong. I haven’t played with Expressway clustering in a bit.</span><br>
<span></span><br>
<span>2.) As far as the Jabber registration goes; what I’ve done before in the edge is have the collab-edge SRV point to the edge cluster FQDN as the target. Then I create round robin A records for the cluster FQDN (one resolving your each edge server). The
for the edge certs, just make sure the edge cluster fqdn is in the SAN.</span><br>
<span></span><br>
<span>This way if one of the edge server goes down, the Jabber client is ultimately still trying to resolve the same MRA FQDN via SRV lookup (this a key to Jabber client failover for MRA).
</span><br>
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<span>Thanks,</span><br>
<span></span><br>
<span>Ryan</span><br>
<span></span><br>
<blockquote type="cite"><span>On Jan 28, 2020, at 20:50, Jonathan Charles <<a href="mailto:jonvoip@gmail.com" target="_blank">jonvoip@gmail.com</a>> wrote:</span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
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<blockquote type="cite"><span></span><br>
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<blockquote type="cite"><span>We have two pairs of Expressway clusters (C/E) at two different locations (primary and DR)...</span><br>
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<blockquote type="cite"><span></span><br>
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<blockquote type="cite"><span>The cluster is up, however, we want to make sure that we are in Active/Standby.</span><br>
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<blockquote type="cite"><span>Currently, we have one of our SRV records for collab-edge set at 5 (the backup is at 10) with the same weight.</span><br>
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<blockquote type="cite"><span></span><br>
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<blockquote type="cite"><span>The clustering guide says we should set the priority and weight on both SRV records the same, which will cause half of the registrations to go to the DR site. It is far away and has less capability.</span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>How do we:</span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>1 - Make sure the primary site handles all MRA registrations and the DR site is only used when the primary is down.</span><br>
</blockquote>
<blockquote type="cite"><span>2 = Make sure failover occurs automatically... currently Jabber users have to log out and back in to connect to the DR site.</span><br>
</blockquote>
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<blockquote type="cite"><span>Thanks!</span><br>
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<blockquote type="cite"><span>Jonathan </span><br>
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</blockquote>
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