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<p>Hi Daniel,</p>
<p> You sent this to clusterlabs owners, instead of users. I've
changed the CC to send it to the list for a larger discussion.<br>
</p>
<p> The biggest problem with stretch clustering is knowing the
difference between a link fault and a site loss. Pacemaker Booth
was designed to solve this problem by using a "cluster of
clusters". The logic being that if a site is lost, an arbiter node
at a third site can decide which site should live, and trust the
lost side will either behave sensibly (because it is itself a
cluster), or it's destroyed.</p>
<p> After this, it just becomes a question of implementation
details. Have the master side update a DNS entry should be fine
(though you may need to write a small resource agent to do it, not
sure if one exists for DNS yet).</p>
<p>digimer<br>
</p>
<div class="moz-cite-prefix">On 2020-04-17 11:44 a.m., Daniel Smith
wrote:<br>
</div>
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<p class="MsoNormal">I have been searching how to customize
pacemaker to manage NFS servers in separate datacenters, but I
am finding older data that suggests this is a bad idea and not
much information about how to customize it to do this without
the 1 IP being moved back and forth. If this isn’t the best
tool, please let me know, but here is the setup I am trying to
do if someone can help point me to some information on how the
best way is to do this.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Server 1: DC01-NFS01,
10.0.1.10/24<o:p></o:p></p>
<p class="MsoNormal">Server 2: DC02-NFS01,
10.0.2.10/24<o:p></o:p></p>
<p class="MsoNormal">NFS share:
nfs01.domain.local:/opt/nfsmounts using drbd to sync between
datacenters<o:p></o:p></p>
<p class="MsoNormal">DC01 to DC02 has a 2Gb layer 2 connection
between the datacenters<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I would like to have pacemaker manage the
NFS services on both systems in an active/passive setup where
it updates the DNS servers with the active server’s IP for
nfs01.domain.local. Eventually, we will have a virtual switch
in VMWare that I would like pacemaker to update, but for now,
the delay in DNS updates will be acceptable for failover.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thank you in advance for any help you can
provide.<o:p></o:p></p>
</div>
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Network Engineer<br>
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<pre class="moz-signature" cols="72">--
Digimer
Papers and Projects: <a class="moz-txt-link-freetext" href="https://alteeve.com/w/">https://alteeve.com/w/</a>
"I am, somehow, less interested in the weight and convolutions of Einstein’s brain than in the near certainty that people of equal talent have lived and died in cotton fields and sweatshops." - Stephen Jay Gould</pre>
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