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# elemental
a
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b
It might depend, but blue/green tends to be trend. You can probably do it one at a time since deleting a node re-provisions it.
I think there are some settings that only get applied with a re-install (like hostname) but I could be wrong.
c
Yeah, I've read about the various stages, like pre/post-install. So far I don't plan to touch the partitioning, so I should be good. I've tried applying my changes using an update group, but that failed for unknown reason.
It just seems a little bit heavy to reinstall all nodes just because a user changed.
(I don't mind if that change takes hours to be applied everywhere. It just shouldn't be a manual step.)