kube-controller-manager
Component responsible for operating cluster controllers
Logically, each controller is a separate process, but to reduce complexity, they are all compiled into a single binary and run in a single process.
Node Controller
Responsible for noticing and responding when nodes go down.
Replication Controller
Responsible for maintaining the correct number of pods for every replication controller object in the system.
Endpoints Controller
Populates the Endpoints object (that is, joins Services & Pods).
Service Account & Token Controllers
Create default accounts and API access tokens for new namespaces.
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