Github user vanzin commented on the issue:
https://github.com/apache/spark/pull/22608
> Think we want different images for each
You don't need to, right? You can have a single image with all the stuff
needed. That would also make setting up the test faster (less images to build).
> just run a pod with those three containers
That's mostly me still getting used to names here; to me pod == one
container running with some stuff.
But in any case, my main concern in this case is resource utilization - it
we can keep things slimmer by running less containers, I think that's better.
Individually, the NN, DN and the KDC don't need a lot of resources for this
particular test to run.
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