If you'd like to read more about the Kubernetes Operator Framework, check out this blog post: https://coreos.com/blog/introducing-operator-framework.
If you'd like to check out a video on Kubernetes monitoring from Packt, see this video: https://www.packtpub.com/mapt/video/virtualization_and_cloud/9781789130003/65553/65558/monitoring-your-infrastructure.