client-go

Version: v0.25.0

1. clientset: a set of clients to access Kubernetes API
2. indexer: An indexed in-memory key-value store for objects
3. informer
   1. indexer
   2. reflector
   3. ListerWatcher
4. lister
   1. indexer
5. watcher
6. reflector: watches a specified resource with listerwatcher and reflects all changes to the configured store (FIFO).
7. listerwatcher: list and watch the API server. used in reflector.