logging, auditig and metrics through Kafka and console

[stevehu]

This gives us more opportunities to attach more micorserivces to the stream.

[stevehu]

For developers, you don't need to get Kafka and Zookeeper to be started on your laptop or desktop and the default behaviour is to send all the info to the console. Once Kafka redirect is enabled, it will send to Kafka and usually this should be tested by at least one team member before releasing to official environment.

[stevehu]

This can be done through the kafka-sidecar or building an agent API with kafka-sidecar for all the services to connect from the same cluster.