[Beowulf] Warewulf vs. OpenCHAMI

[Paul Edmon]

Greetings! We are looking at overhauling our build system to move to 
diskless booting. From our investigation we've landed on two potential 
options that have been mentioned by multiple people.

Warewulf: Industry proven and supports building images from Containers.

OpenCHAMI: New comer, modern microservices approach that also supports 
building images from Containers.

I've done some reading up on both but I would love to hear your 
thoughts/experiences with either or both.

Here are our criteria:

 1.

    Can handle diskless booting for a 2k node cluster

 2.

    Good history of updates and responsiveness to issues

 3.

    Active and good sized community is a plus

 4.

    Good docs

 5.

    Conforms to "standards"

 6.

    Building images easily via CI pipeline would be great

Main use case is for us to replace our various (usually multi-day) 
upgrades with this new system. We expect that we will still need to do 
some level of node config outside of the new system (Puppet).

Thanks in advance.

-Paul Edmon-
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