Imesh Gunaratne created STRATOS-1012:
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Summary: Clustering support for Cloud Controller
Key: STRATOS-1012
URL: https://issues.apache.org/jira/browse/STRATOS-1012
Project: Stratos
Issue Type: Improvement
Components: Cloud Controller
Affects Versions: 4.1.0 M5
Reporter: Imesh Gunaratne
Assignee: Imesh Gunaratne
Currently cloud controller does not support clustering for providing high
availability. At present it has two in memory data structures which manages its
state; Data Holder, Topology.
The idea is to have a coordinator node to handle data persistence logic and
message publishing (topology, instance status, etc). The coordinator will be
selected randomly and at a given time there will be only one coordinator. If
the existing coordinator node goes down, another member will become the
coordinator automatically (similar to carbon clustering agent).
According to this design Autoscaler (AS)/Stratos Manager (SM) will talk to
Cloud Controller (CC) via the Cloud Controller Service endpoint exposed via the
load balancer.
Data Replication
When a request comes into one of the CC instances it will execute the necessary
actions and update the data holder and/or topology which is in memory. At this
point the data holder and topology changes will be replicated to other
instances using a distributed map. Once the coordinator receives the above
updates it will persist the changes to the registry database.
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