[jira] [Reopened] (STRATOS-1012) Clustering support for Cloud Controller

["Imesh Gunaratne (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/STRATOS-1012?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Imesh Gunaratne reopened STRATOS-1012:
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> 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 Alpha
>            Reporter: Imesh Gunaratne
>            Assignee: Imesh Gunaratne
>             Fix For: 4.1.0 Alpha
>
>         Attachments: Cloud Controller - Clustering Model.png
>
>
> 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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