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<p class="MsoNormal"><span style="font-size:11.0pt">Hi All,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I’ve been struggling with a POC where I’ve got two Zimbra servers (both with proxy, LDAP, mailbox, SMTP sevices installed) in two different data-centers paired up as a “farm” (with the hope that I’ll be able
to ultimately migrate mailboxes between them). I’ve arranged DNS-resolution, ACLs and local UFW firewall rules so each server can find & fully-access the other (via the others public-IP address). Pairing up the servers was straightforward enough (LDAP MMR
is up and running) and I can fully manage both servers from either proxy server.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo3"><span style="font-size:11.0pt">End-user mailbox access via the web-UI has issues though. I THINK I’ve isolated it to memcached (it’s running on both Zimbra servers – at some point
I’ll retire one of the servers after mailboxes are migrated).<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo3"><span style="font-size:11.0pt">What happens is web-UI partially loads (looks mostly fine, but the folder on the left hand side is missing and some of the tabs are broken (they throw
javascript errors – due to missing content).<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo3"><span style="font-size:11.0pt">Looking through the logs it seems that each server is having trouble getting to port 11211 (memcached) on the “other server”<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo3"><span style="font-size:11.0pt">Despite that I could telnet to the other server on port 11211 just fine.<o:p></o:p></span></li></ul>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I’ve got a support ticket open w/Zimbra but I wanted to ask the group a couple questions based on my observations.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Support had me set the following on each server:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">zmprov ms $(zmhostname) zimbraMemcachedBindAddress 127.0.0.1 <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">zmprov ms $(zmhostname) zimbraMemcachedClientServerList 127.0.0.1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Once that was one the web-UI was “fine” (albeit a bit slower – because I think memcached on each server has been isolated to itself).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Collateral-damage on this was that ActiveSync clients starting having issues (lots of log entries in nginx.log complaining about not being able to get to memcahed).r<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Questions (I’ve read much about memcached but references to this are slim):<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo3"><span style="font-size:11.0pt">What is
<span style="color:black">zimbraMemcachedClientServerList for exactly? (I THOGUHT it might be a layer of security – listing allowed clients & set allowed private/public IPs – but no joy there)</span><o:p></o:p></span></li></ul>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Also:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo3"><span style="font-size:11.0pt;color:black">Is memcached (as it’s meant used in Zimbra) cool to be running on multiple servers?</span><span style="font-size:11.0pt"><o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo3"><span style="font-size:11.0pt;color:black">If so are the memcached processes(as it’s meant used in Zimbra) on each server supposed to talk to each other?</span><span style="font-size:11.0pt"><o:p></o:p></span></li></ul>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thanks for your consideration,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">David<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><b><span style="font-size:13.0pt;font-family:"Arial",sans-serif;color:#003767">David Merrill</span></b><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><b><span style="font-family:"Arial",sans-serif;color:#949CA1">Senior Systems Engineer,</span></b><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><b><span style="font-family:"Arial",sans-serif;color:#949CA1">Managed and Private/Hybrid Cloud Services</span></b><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><b><span style="font-size:13.0pt;font-family:"Arial",sans-serif;color:#003767">OTELCO</span></b><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-family:"Arial",sans-serif;color:#949CA1">92 Oak Street, Portland ME 04101</span><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-family:"Arial",sans-serif;color:#949CA1">office
<a href="callto:207.772.5678">207.772.5678</a></span><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><b><span style="font-family:"Arial",sans-serif;color:black"><a href="http://www.otelco.com/cloud-and-managed-services" target="_blank">http://www.otelco.com/cloud-and-managed-services</a></span></b><span style="font-size:11.0pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="font-size:11.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#949CA1">Confidentiality Message</span></b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#949CA1"><br>
The information contained in this e-mail transmission may be confidential and legally privileged. If you are not the intended recipient, you are notified that any dissemination, distribution, copying or other use of this information, including attachments,
is prohibited. If you received this message in error, please call me at <a href="callto:207.772.5678">
207.772.5678</a> so this error can be corrected.</span><span style="font-size:11.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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