Supports providing different NodeInfos sources (either upstream or in
local forks, eg. to properly implement variants like in #4000).
This also moves a large and specialized code chunk out of core, and removes
the need to maintain and pass the GetNodeInfosForGroups() cache from the side,
as processors can hold their states themselves.
No functional changes to GetNodeInfosForGroups(), outside mechanical changes
due to the move: remotely call a few utils functions in core/utils package,
pick context attributes (the processor takes the context as arg rather than
ListerRegistry + PredicateChecker + CloudProvider), and use the builtin cache
rather than receiving it from arguments.
This is the first step of implementing
https://github.com/kubernetes/autoscaler/issues/3583#issuecomment-743215343.
New method was added to cloudprovider interface. All existing providers
were updated with a no-op stub implementation that will result in no
behavior change.
The config values specified per NodeGroup are not yet applied.
No change in actual logic being executed. Added a new
NodeGroupListProcessor interface to encapsulate the existing logic.
Moved PodListProcessor and refactor how it's passed around
to make it consistent and easy to add similar interfaces.
Yaroslava Serdiuk
bsoghigian
Daniel Gutowski
Jayant Jain
Benjamin Pineau
Bartłomiej Wróblewski
Maciek Pytel
Jakub Tużnik
Adam Malcontenti-Wilson
Vivek Bagade
Łukasz Osipiuk
Krzysztof Jastrzebski
Beata Skiba