Github user tnachen commented on the issue:
https://github.com/apache/spark/pull/22146
I've been looking to mount additional volumes to the executor containers
and just tried out the PR.
It doesn't seem possible since if you add the container in the pod
template, BasicExecutorFeatureStep still adds another executor container and
then it becomes a invalid pod spec.
I think it's worth considering if we want pod templates to have the ability
to modify or add existing elements that the code adds to the pod spec, or this
is only for adding additional attributes than what the code already does.
It seems like the latter is simplest, but just throwing out here that for
features like adding volumes to executor this won't work.
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