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<p>Hi Chris,</p>
<p>Kubernetes<b> </b>and Docker are similar in some ways but also
have some significant differences. I can see where Docker would be
useful for managing half a dozen or so microrepositories you may
have sitting around. As it allows you to have the repository
isolation, (e.g. each Docker container has its own /opt/eprints3)
but you don't have to expend as much resource as having VMs for
each microrepository which may need 2GB each. A VM with Docker
containers may allow you to get away with only 4GB of RAM and one
maybe two CPU cores. Kubernetes seems overly complex unless you
have dozens of microrepositories (and/or regularly have churn or
microrepositories being hosted), or have a need for high
availability. <br>
</p>
<p>As EPrints is rarely deployed as high availability (e.g. multiple
instances behind a load balancer), I am not sure how well it would
work on a Kubernetes platform, if you separated the web frontend
(Apache/Perl) from the database backend / scheduled tasks (bin
scripts) and only had high-availability with the former, I don't
see any specific issues but the backend database may not be so
straightforward to configure for high-availability. It would be
useful to hear the experiences from anyone who has deployed a
coventional high availability setup that includes a database
cluster at the backend. It is certainly possible to host an
application that was not specifically designed to be high
availability to run off a database cluster but I suspect there
would likely be teething problems doing this with EPrints.</p>
<p>Regards</p>
<p>David Newman<br>
<b></b></p>
<div class="moz-cite-prefix">On 27/10/2021 09:22, Justin Bradley via
Eprints-tech wrote:<br>
</div>
<blockquote type="cite" cite="mid:EMEW3|32a37bad5d802e7e6ba8f33812c51266x9Q9NF14eprints-tech-bounces|ecs.soton.ac.uk|LO4P265MB3583923238D7A3A294D3A5CB90859@LO4P265MB3583.GBRP265.PROD.OUTLOOK.COM">
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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">I’ve
not tried Kubernetes, but have had success with Docker, if
that’s helpful.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><a href="https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Ffiles.eprints.org%2F2454%2F&data=04%7C01%7Ceprints-tech%40ecs.soton.ac.uk%7C5fb2a16d30444e04d33608d99934421e%7C4a5378f929f44d3ebe89669d03ada9d8%7C0%7C0%7C637709271984583189%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3Y0Y1msA5%2BWX7TfDuoiTCvoOxogu92j4YTKDVqYbb3g%3D&reserved=0" originalSrc="http://files.eprints.org/2454/" shash="AOF6Gm5ySxskvL+iT72y3afF4+0b2aO8otPrxz2QFqtaDoFXWlt/ipKCgWUgnvPK0nwA9WGpRX7ZMUeaGZ3jacYUzRGdo2DHNi10DUP2WDuLWx9OH4bN40rfF9/b6WcTaEz4ldNKcZBJrQmG40XnHYpiziH5geoBlSHFhaQpMgY=" originalsrc="http://files.eprints.org/2454/" shash="PI49r65wQayBxxid5MLxrBMqP+yh7vlOLFS38xaIpwLq3Lk561TybO7QwUNtdz77TXCv75fGuqEAS9dNN+X8lBuvwQz2aKVCDfwpWiiCgWx3JxsXX9rdOnY5MWSHNasywYAIfw1AE4rp8UkjYB6gj+xYO6b6mFJbCiXQvCC8n/Q=" moz-do-not-send="true">http://files.eprints.org/2454/</a>
(might be a bit outdated, I may well have a better version
lying around.)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">
Justin<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black"><a class="moz-txt-link-abbreviated" href="mailto:eprints-tech-bounces@ecs.soton.ac.uk">eprints-tech-bounces@ecs.soton.ac.uk</a>
<a class="moz-txt-link-rfc2396E" href="mailto:eprints-tech-bounces@ecs.soton.ac.uk"><eprints-tech-bounces@ecs.soton.ac.uk></a> on behalf of
Christopher Gutteridge via Eprints-tech
<a class="moz-txt-link-rfc2396E" href="mailto:eprints-tech@ecs.soton.ac.uk"><eprints-tech@ecs.soton.ac.uk></a><br>
<b>Date: </b>Friday, 22 October 2021 at 12:33<br>
<b>To: </b><a class="moz-txt-link-abbreviated" href="mailto:eprints-tech@ecs.soton.ac.uk">eprints-tech@ecs.soton.ac.uk</a>
<a class="moz-txt-link-rfc2396E" href="mailto:eprints-tech@ecs.soton.ac.uk"><eprints-tech@ecs.soton.ac.uk></a><br>
<b>Subject: </b>[EP-tech] Kubernetes and EPrints<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal">I've a bunch of "microrepositories" on
ancient linux that need moving to
<br>
new hosting. eg. <a href="https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Frefrain.ac.uk%2F&data=04%7C01%7Ceprints-tech%40ecs.soton.ac.uk%7C5fb2a16d30444e04d33608d99934421e%7C4a5378f929f44d3ebe89669d03ada9d8%7C0%7C0%7C637709271984593144%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=wFAsTGohtCMvNGktljoslOMS9i7yq14JRo9Oeco7Oxc%3D&reserved=0" originalSrc="http://refrain.ac.uk/" shash="U57mS9gGa30f6wt6roa3d3U2ei6IvMmZ2q/pSRyJ4TWPcRh64ouArMU0xyzaAzuKaR+tDWlO9meHUX4EtpM8WWpQBJLaH3IFpDq8ZzfUdZpT0+Kru3nLWZlu8kN0ggXNDN7U2OX6BBD8qNxTVkgAkb0p1/ieMC0y07BDZ3f1kmw=" originalsrc="http://refrain.ac.uk/" shash="dUtdWsbYe4AvqwGllnfVJ+wbR1Bt10erSNwaehbc7HJySz6DhGHXKyQElkJHhllBvA0b+4e+/P0GA6Oqf8TcXt01fNzvLKn5ylfnRy4x+Sebi3pmjfEi9ycZWg7TY3YlgBLpp9wictPPk8V3ArxklwjJZw1FofFn7hfc7yzQOqc=" moz-do-not-send="true">
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<br>
I'm wondering if Kubernetes might be more appropriate than a
VM for <br>
these minor sites?<br>
<br>
Anyone got any insight?<br>
<br>
<br>
-- <br>
Christopher Gutteridge <a class="moz-txt-link-rfc2396E" href="mailto:totl@soton.ac.uk"><totl@soton.ac.uk></a><br>
You should read our team blog at <a href="http://blog.soton.ac.uk/webteam/" moz-do-not-send="true">http://blog.soton.ac.uk/webteam/</a><br>
(I live near Highfield Campus, so in person, outdoor and
socially distanced meetings are an option)<br>
<br>
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