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https://issues.apache.org/jira/browse/NIFI-14921?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Handermann updated NIFI-14921:
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Summary: Decouple ZooKeeper Clustering to Separate NAR (was: Decouple
ZooKeeper to Separate NAR)
> Decouple ZooKeeper Clustering to Separate NAR
> ---------------------------------------------
>
> Key: NIFI-14921
> URL: https://issues.apache.org/jira/browse/NIFI-14921
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Core Framework
> Reporter: David Handermann
> Assignee: David Handermann
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> NiFi 2 introduced the Leader Election Manager interface as a framework
> extension, with direct support for either Apache ZooKeeper or Kubernetes to
> implement clustering. The project packages the Kubernetes Leader Election
> Manager and State Provider in a separate NAR, and the ZooKeeper
> implementation should follow the same approach.
> Historical support for an embedded ZooKeeper server involves more direct
> linkage to ZooKeeper components. The embedded ZooKeeper server component can
> be extracted and wrapped in a State Provider implementation to enable
> decoupled NAR packaging. This decoupling strategy can avoid any breaking
> changes to existing deployments, retaining support for current application
> properties.
> Future work could consider alternative methods for decoupling embedded
> clustering, or a native clustering solution with minimal external
> dependencies.
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