Generate statsd-exporter config as configmap

[zufardhiyaulhaq]

Signed-off-by: zufardhiyaulhaq zufardhiyaulhaq@gmail.com

Summary

Currently, all metrics from envoy/ratelimit are based on statsd. It's pretty hard to manage. Luckily, the community has written statsd-exporter to change statsd metrics to Prometheus metrics to comply with industry standards. This MR aim to generate statsd-exporter configuration as configmap.

Type of Change

This PR fixes/implements the following bugs/features:

• generate statsd-exporter configmap

https://github.com/zufardhiyaulhaq/istio-ratelimit-operator/issues/26

How has this been tested?

Proof:

Checklist:

• [x] My code follows the code style of this project.
• [x] My change requires a change to the documentation.
  • [x] I have updated the documentation accordingly.
• [ ] I have written new tests for my changes.
  • [x] My changes successfully ran and pass tests locally.