Commits on Sep 29, 2023

1. scheduler framework: support simulating cluster changes during autosc… …

   …aling
   
   The assumption so far was that plugins which are active during cluster
   autoscaling can do their work exclusively based on the information maintained
   by cluster autoscaler about nodes and pods on those nodes. This assumption
   doesn't hold for plugins which need to observe and potentially modified other
   cluster state, like the dynamic resource allocation plugin.
   
   Such plugins need a way to do its own snapshotting of the cluster state at the
   start of a simulation and then update that snapshotting while the cluster
   autoscaler simulates the placement of pods on nodes.
   
   The new ClusterAutoScalerPlugin interface provides a mechanism for this. It is
   not used anywhere in kube-scheduler itself, but has to be defined here because
   plugins cannot get it from k8s.io/autoscaler (circular dependency) and creating
   a new repo seems overkill.

   

   pohly committed Sep 29, 2023
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