szaszm commented on code in PR #1340: URL: https://github.com/apache/nifi-minifi-cpp/pull/1340#discussion_r899503240
########## METRICS.md: ########## @@ -0,0 +1,153 @@ +<!-- + 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. +--> + +# Apache NiFi - MiNiFi - C++ Metrics Readme. + + +This readme defines the metrics published by Apache NiFi. All options defined are located in minifi.properties. + +## Table of Contents + +- [Description](#description) +- [Configuration](#configuration) +- [Metrics](#metrics) + +## Description + +Apache NiFi MiNiFi C++ can communicate metrics about the agent's status, that can be a system level or component level metric. +These metrics are exposed through the agent implemented metric publishers that can be configured in the minifi.properties. +Aside from the publisher exposed metrics, metrics are also sent through C2 protocol of which there is more information in the +[C2 documentation](C2.md#metrics). + +## Configuration + +To configure the a metrics publisher first we have to set which publisher class should be used: + + # in minifi.properties + + nifi.metrics.publisher.class=PrometheusMetricsPublisher + +Currently PrometheusMetricsPublisher is the only available publisher in MiNiFi C++ which publishes metrics to a Prometheus server. +To use the publisher a port should also be configured where the metrics will be available to be scraped through: + + # in minifi.properties + + nifi.metrics.publisher.port=9936 Review Comment: It begs the question, which of those values belong to which publisher? What if a publisher doesn't use the network, or not through TCP/UDP? Or it periodically posts via HTTP, in which the URL already has the port? We could declare a global port setting and have the publishers read from it if they want to, but it fundamentally belongs to the component that actually uses that port, if they need such a setting. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
