Epic Overview

Autoscaling in OSP consisted of 4 components up to OSP 17.1

• ceilometer for data gathering
• gnocchi to store and provide metrics
• aodh as alarming component that would
  • store alarming rules
  • iterate over the rules
  • evaluate the rules, fetch the metrics from the data store
  • compare and if necessary: fire up an action
• heat to orchestrate the changes triggered by the alarm action

Goals

This is a dependency for OSP-23207; either we can deploy gnocchi, or change aodh so that e.g prometheus can satisfy this dependency.