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https://issues.apache.org/jira/browse/NIFI-5443?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17855212#comment-17855212
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Malthe Borch commented on NIFI-5443:
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[~pepov] if the flow.xml.gz file is pulled either from the current primary node
or from a backup (in case we're alone), there shouldn't be the problem you
mention – "stop a node for a while".
There's a risk that changes to the flow configuration happen exactly during our
joining the cluster, but that's in frequent and we can just crash letting the
pod restart, hopefully having more luck next time.
> Improve cluster configuration for dynamic scaling
> -------------------------------------------------
>
> Key: NIFI-5443
> URL: https://issues.apache.org/jira/browse/NIFI-5443
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Core Framework
> Affects Versions: 1.7.1
> Reporter: Andy LoPresto
> Priority: Minor
> Labels: cluster, docker, kubernetes, rkt, scale, security
>
> Currently, NiFi is designed for static clusters, with frequent references in
> configuration files to a priori knowledge of node hostnames, ports, etc.
> Efforts should be taken to make NiFi easier to dynamically scale. This can
> involve containerization improvements via Docker/rkt, deployment improvements
> via Kubernetes, and abstraction of the configuration values needed to stand
> up the cluster. A node should be able to join the cluster, and, given the
> correct keystore and truststore, immediately communicate with other existing
> nodes in the cluster without requiring direct configuration changes to them,
> or a restart of any node.
> * {{authorizers.xml}}
> * node identities
> * permissions ({{RW}} on {{/proxy}})
> * ZooKeeper configuration
> * etc.
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