PR: Implement Prometheus Metrics for ScaleIO

[dvonthenen]

This work represents that Go application that will provide a shim layer to expose a Prometheus /metric endpoint and create the Prometheus pref counter objects for ScaleIO.

• [x] Create Kubernetes-ScaleIO-Prom project in GitHub
• [x] Add dependencies to project: goScaleIO, Logrus, Testify, Prometheus Client
• [x] Implement Prometheus /metrics endpoint in REST
• [x] Mine ScaleIO Statistics object from StoragePools
• [x] Translate Statistic objects to Promethues Pref Counter Objects
• [x] Create the Dockerfile and image for this Endpoint
• [x] Create Kubernetes deployment YAML for consuming ScaleIO deployed using ScaleIO Native Driver
• [x] Create Kubernetes deplyoment YAML for consuming generic ScaleIO

Deliverable Date: 8/25

[dvonthenen]

You can find the repo here: https://github.com/dvonthenen/kubernetes-scaleio-prom

[dvonthenen]

Initial check in has been done... need to package and test.

[clintkitson]

👍

[dvonthenen]

Surprised it worked on the first shot! This is done!

Deployment YAMLs created and updated the README.md. Note this is not a full blown metrics implementation, but there are enough metrics collected (MVP) for this to be useful.