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https://issues.apache.org/jira/browse/NIFI-16298?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alexander Bij updated NIFI-16298:
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Description:
h2. Summary
Improvement to be able to build a Grafana dashboard showing the Primary Node
and Cluster Coordinator based on the prometheus scrape.
The Prometheus flow metrics endpoint
({{{}/nifi-api/flow/metrics/prometheus{}}}) exposes cluster
membership/connectivity metrics, but nothing indicates which node currently
holds the Primary Node or Cluster Coordinator role. Building a "nodes in this
cluster" dashboard/table (one row per node, with its key stats) currently has
no way to mark which row is the Primary Node or the Cluster Coordinator without
querying NiFi's REST API separately and joining the data out-of-band.
was:
h2. Summary
The Prometheus flow metrics endpoint (\{{/nifi-api/flow/metrics/prometheus}})
exposes cluster membership/connectivity metrics (\{{cluster_is_clustered}},
\{{cluster_is_connected_to_cluster}}, \{{cluster_connected_node_count}},
\{{cluster_total_node_count}}, all in \{{ClusterMetricsRegistry}}), but nothing
indicates which node currently holds the *Primary Node* or *Cluster
Coordinator* role. Building a "nodes in this cluster" dashboard/table (one row
per node, with its key stats) currently has no way to mark which row is the
Primary Node or the Cluster Coordinator without querying NiFi's REST API
separately and joining the data out-of-band.
h2. Why this is useful
To be able to build a Grafana dashboard showing the Primary Node and Cluster
Coordinator directly from the same Prometheus scrape.
> Expose Primary Node and Cluster Coordinator role as Prometheus metrics
> ----------------------------------------------------------------------
>
> Key: NIFI-16298
> URL: https://issues.apache.org/jira/browse/NIFI-16298
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Core Framework
> Affects Versions: 2.11.0
> Reporter: Alexander Bij
> Priority: Major
> Labels: metric-collector, metrics, prometheus
>
> h2. Summary
> Improvement to be able to build a Grafana dashboard showing the Primary Node
> and Cluster Coordinator based on the prometheus scrape.
> The Prometheus flow metrics endpoint
> ({{{}/nifi-api/flow/metrics/prometheus{}}}) exposes cluster
> membership/connectivity metrics, but nothing indicates which node currently
> holds the Primary Node or Cluster Coordinator role. Building a "nodes in this
> cluster" dashboard/table (one row per node, with its key stats) currently has
> no way to mark which row is the Primary Node or the Cluster Coordinator
> without querying NiFi's REST API separately and joining the data out-of-band.
>
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