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https://issues.apache.org/jira/browse/NIFI-4809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16397714#comment-16397714
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ASF GitHub Bot commented on NIFI-4809:
--------------------------------------

Github user mattyb149 commented on a diff in the pull request:

    https://github.com/apache/nifi/pull/2430#discussion_r174294363
  
    --- Diff: 
nifi-nar-bundles/nifi-site-to-site-reporting-bundle/nifi-site-to-site-reporting-task/src/main/resources/docs/org.apache.nifi.reporting.SiteToSiteMetricsReportingTask/additionalDetails.html
 ---
    @@ -0,0 +1,178 @@
    +<!DOCTYPE html>
    +<html lang="en">
    +    <!--
    +      Licensed to the Apache Software Foundation (ASF) under one or more
    +      contributor license agreements.  See the NOTICE file distributed with
    +      this work for additional information regarding copyright ownership.
    +      The ASF licenses this file to You under the Apache License, Version 
2.0
    +      (the "License"); you may not use this file except in compliance with
    +      the License.  You may obtain a copy of the License at
    +          http://www.apache.org/licenses/LICENSE-2.0
    +      Unless required by applicable law or agreed to in writing, software
    +      distributed under the License is distributed on an "AS IS" BASIS,
    +      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 
implied.
    +      See the License for the specific language governing permissions and
    +      limitations under the License.
    +    -->
    +    <head>
    +        <meta charset="utf-8" />
    +        <title>SiteToSiteMetricsReportingTask</title>
    +
    +        <link rel="stylesheet" 
href="../../../../../css/component-usage.css" type="text/css" />
    +    </head>
    +
    +    <body>
    --- End diff --
    
    This is excellent documentation, thank you!


> Implement a SiteToSiteMetricsReportingTask
> ------------------------------------------
>
>                 Key: NIFI-4809
>                 URL: https://issues.apache.org/jira/browse/NIFI-4809
>             Project: Apache NiFi
>          Issue Type: New Feature
>          Components: Extensions
>            Reporter: Pierre Villard
>            Assignee: Pierre Villard
>            Priority: Major
>
> At the moment there is an AmbariReportingTask to send the NiFi-related 
> metrics of the host to the Ambari Metrics Service. In a multi-cluster 
> configuration, or when working with MiNiFi (Java) agents, it might not be 
> possible for all the NiFi instances (NiFi and/or MiNiFi) to access the AMS 
> REST API.
> To solve this problem, a solution would be to implement a 
> SiteToSiteMetricsReportingTask to send the data via S2S to the "main" NiFi 
> instance/cluster that will be able to publish the metrics into AMS (using 
> InvokeHTTP). This way, it is possible to have the metrics of all the 
> instances exposed in one AMS instance.
> I propose to send the data formatted as we are doing right now in the Ambari 
> reporting task. If needed, it can be easily converted into another schema 
> using the record processors once received via S2S.



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