Devdatta Kulkarni 220ca987ad Added documentation of how client-go interfaces with custom controller code ... **What this PR does / why we need it**: The sample-controller makes extensive use of various mechanisms available in the client-go library. For writing custom controllers/operators it will be helpful if there is precise description of how the client-go library works and how/where it interfaces with custom controller code. This patch adds documentation that sheds light on how (parts) of the client-go library work and its interaction-points with controller code. The documentation and the diagram comes from [1], (link included here for reference purpose). [1] https://medium.com/@cloudark/kubernetes-custom-controllers-b6c7d0668fdf Contributing the diagram and the writeup was recommended by by @sttts and @nikhita on https://github.com/kubernetes/sample-controller/issues/13 **Release note**: ```release-note NONE ``` Kubernetes-commit: 3e22383a8a14eb3bd02630f3f11c0ad7a806e027		2018-04-13 14:32:47 -05:00
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client-go-controller-interaction.jpeg	Added documentation of how client-go interfaces with custom controller code	2018-04-13 14:32:47 -05:00