Create a more robust Service Controller package to support the "modular binary" approach

[jrschumacher]

The POC was implemented quickly to demonstrate value. As we move towards production (including bringing in our other services) we need to consider building a more robust Service Controller.

Requirements are:

• move logic from the start command to a logical package
• support the modular binary approach
  • default behavior should be running a single instance (vertical scalability)
  • customer should be able to select the services they wish to start (horizontal scalability)
    • required for multi-kas and federation
• handle graceful shutdown of services, panics, logging, etc

[jrschumacher]

@pflynn-virtru

what happens when the OPA engine goes down? Does the whole server get marked as unhealthy? Does it restart the OPA engine?

[jrschumacher]

I would also ask, can you run the platform without OPA? Seems that OPA is required for Authorization, but I could decouple my Policy API service from Authorization if desired.

[biscoe916]

@jrschumacher Is this already done?

[jrschumacher]

We could call it done or leave it open for further enhancements. Might be best to just open new issues when work is identified and time permits.