Spike to determine the work in drools-pdp for redundancy support

As a ONAP developer, I would like to perform a spike to determine the work needed in drools-pdp for redundancy support. Basically that means increasing the replicaSet from 1 to at least 2 and verify all the operations are working as expected. Following are the main areas to look at:

• Sending registration & heartbeat requests to PAP.
• Deployment/Undeployment of policies.
• Reading events from DMaaP topic in parallel.
• Processing events in parallel.
• Reading response of an execution request sent to actors.
• Updating operations in policy database.
• Persisting logs from multiple PDP instances in a single k8s PV.
• Fetching prometheus metrics from multiple PDP instances.
• Fetching Statistics for multiple PDP instances
• Distributing the load between the multiple PDP instances.
• What is needed to make the PDP stateless, thereby converting statefulset to deployment in oom charts.
• Check the possibility of performing rolling update of the k8s pods.