Intergration of Prometheus and Grafan

[lotzk]

This PR integrates basic monitoring with Prometheus and Grafana.

The services are included in the docker-compose files and run by default in the development environment. You can reach the Grafana web UI at localhost:3000. The credentials are admin:password. For now, no metric data is persisted.

Currently the following metrics are covered:

• Resource Usage (per service)
  • CPU Usage
  • Memory Usage
• HTTP Metrics (per service)
  • Amount of inbound requests along with the code the service responded with
  • Duration it took to respond
  • API calls per minute per route
• Time to insert inbound records into the landscape model
• System overview
  • Up/Down status of each service
  • Average amount of requests going into the system
  • Resource usages (CPU, nemory) of the hosts systems ExplorViz runs on

A distinct dashboard corresponds to each of the above categories. Let me know if you need more/other metrics.

[lotzk]

@Alexander-Krause can you verify this works on Mac? I have the feeling that this breaks due to the lack of support for running containers in the host network. Prometheus expects to find the ExplorViz services at localhost:XXXX.

[Alexander-Krause-Glau]

Will do.