pepov commented on a change in pull request #3257: NIFI-5435 Prometheus /metrics http endpoint for monitoring integration URL: https://github.com/apache/nifi/pull/3257#discussion_r256414475
########## File path: nifi-nar-bundles/nifi-prometheus-bundle/nifi-prometheus-reporting-task/src/main/java/org/apache/nifi/reporting/prometheus/PrometheusReportingTask.java ########## @@ -0,0 +1,105 @@ +/* + * 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. + */ + +package org.apache.nifi.reporting.prometheus; + +import java.net.InetSocketAddress; +import java.util.ArrayList; +import java.util.List; + +import org.apache.nifi.annotation.configuration.DefaultSchedule; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnScheduled; +import org.apache.nifi.annotation.lifecycle.OnShutdown; +import org.apache.nifi.annotation.lifecycle.OnStopped; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.controller.ConfigurationContext; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.processor.util.StandardValidators; +import org.apache.nifi.reporting.AbstractReportingTask; +import org.apache.nifi.reporting.ReportingContext; +import org.apache.nifi.scheduling.SchedulingStrategy; +import org.eclipse.jetty.server.Server; + +@Tags({ "reporting", "prometheus", "metrics" }) +@CapabilityDescription("") +@DefaultSchedule(strategy = SchedulingStrategy.TIMER_DRIVEN, period = "1 sec") + +public class PrometheusReportingTask extends AbstractReportingTask { + + private PrometheusServer prometheusServer; + + static final PropertyDescriptor METRICS_ENDPOINT_PORT = new PropertyDescriptor.Builder().name("Prometheus Metrics Endpoint Port").description("The Port where prometheus metrics can be accessed") + .required(true).expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY).defaultValue("9092").addValidator(StandardValidators.INTEGER_VALIDATOR).build(); + + static final PropertyDescriptor APPLICATION_ID = new PropertyDescriptor.Builder().name("Application ID").description("The Application ID to be included in the metrics sent to Prometheus") + .required(true).expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY).defaultValue("nifi").addValidator(StandardValidators.NON_EMPTY_VALIDATOR).build(); + + static final PropertyDescriptor INSTANCE_ID = new PropertyDescriptor.Builder().name("Instance ID").description("Id of this NiFi instance to be included in the metrics sent to Prometheus") + .required(true).expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY).defaultValue("${hostname(true)}").addValidator(StandardValidators.NON_EMPTY_VALIDATOR).build(); + + static final PropertyDescriptor SEND_JVM_METRICS = new PropertyDescriptor.Builder().name("Send JVM-metrics").description("Send JVM-metrics in addition to the Nifi-metrics") + .allowableValues("true", "false").defaultValue("false").required(true).build(); + + @Override + protected List<PropertyDescriptor> getSupportedPropertyDescriptors() { + final List<PropertyDescriptor> properties = new ArrayList<>(); + + properties.add(METRICS_ENDPOINT_PORT); + properties.add(APPLICATION_ID); + properties.add(INSTANCE_ID); + properties.add(SEND_JVM_METRICS); + + return properties; + } + + @OnScheduled + public void onScheduled(final ConfigurationContext context) { + + final String metricsEndpointPort = context.getProperty(METRICS_ENDPOINT_PORT).getValue(); + + try { + this.prometheusServer = new PrometheusServer(new InetSocketAddress(Integer.parseInt(metricsEndpointPort)), getLogger()); + getLogger().info("Started JETTY server"); + } catch (Exception e) { + getLogger().error("Error: " + e); + e.printStackTrace(); + } + + } + + @OnStopped + public void OnStopped() throws Exception { + Server server = prometheusServer.getServer(); + server.stop(); + } + + @OnShutdown + public void onShutDown() throws Exception { + Server server = prometheusServer.getServer(); + server.stop(); + } + + @Override + public void onTrigger(final ReportingContext context) { + + PrometheusServer.context = context; Review comment: What if multiple tasks are configured? I've just tested and it seems they will overwrite each other ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
