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<p>James,</p>
<p>Sorry, I forgot to include the link to our HA documentation in
the earlier e-mail:
<a class="moz-txt-link-freetext" href="https://docs.openstack.org/cinder/latest/contributor/high_availability.html">https://docs.openstack.org/cinder/latest/contributor/high_availability.html</a></p>
<p>Jay<br>
</p>
<br>
<div class="moz-cite-prefix">On 9/10/2018 3:39 PM, James Penick
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAMomh-6T4iyFy0yfv+1Kcyy7o1RZzgxcPovt_tqaq8ohD5MOYg@mail.gmail.com">
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<div dir="ltr">Ah ok so this is a case of no ones documented it,
but it's do-able.
<div><br>
</div>
<div>If anyone out there has done it we'd be happy to take your
notes! Otherwise we'll figure it out and upstream the process.</div>
<div><br>
</div>
<div>thanks!</div>
<div>-James</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr">On Mon, Sep 10, 2018 at 2:18 PM Jay S Bryant <<a
href="mailto:jungleboyj@gmail.com" moz-do-not-send="true">jungleboyj@gmail.com</a>>
wrote:<br>
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<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
On 9/9/2018 10:58 PM, Adam Spiers wrote:<br>
> Hi James,<br>
><br>
> James Penick <<a href="mailto:jpenick@gmail.com"
target="_blank" moz-do-not-send="true">jpenick@gmail.com</a>>
wrote:<br>
>> Hey folks,<br>
>> Does anyone have experience using zookeeper or redis
to handle HA <br>
>> failover<br>
>> in cinder clusters?<br>
><br>
> I'm guessing you mean failover of an active/passive
cinder-volume<br>
> service?<br>
><br>
>> I know there's docs on pacemaker, however we already<br>
>> have the other two installed and don't want to add
yet another <br>
>> component to<br>
>> package and maintain in our clusters.<br>
><br>
> I'm afraid I don't, but if you make any progress on this,
please let<br>
> me know as it would be great to document:<br>
><br>
> - how this would work<br>
> - any pros and cons vs. Pacemaker<br>
><br>
> and maybe I can help with that.<br>
><br>
> One particular question: if the node running the service
becomes<br>
> unreachable, is it safe to fail it over straight away, or
is fencing<br>
> required first? (I'm pretty sure I've asked this same
question<br>
> before, but I can't remember the answer - sorry!)<br>
James,<br>
<br>
I echo Adam's input. I have only heard of people implementing
with <br>
pacemaker but there is no reason that this couldn't be tried
with other <br>
HA solutions.<br>
<br>
If you are able to try it and document it would be great to
add <br>
documentation here: [1]<br>
<br>
Also, Gorka Eguileor is a good contact as he has been doing
much of the <br>
work on HA Cinder though his focus is on Active/Active HA.<br>
<br>
Let us know if you have any further questions.<br>
<br>
Thanks!<br>
Jay<br>
<br>
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