| /* |
| * 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.dubbo.metrics.prometheus; |
| |
| import com.sun.net.httpserver.HttpServer; |
| import io.micrometer.prometheus.PrometheusConfig; |
| import io.micrometer.prometheus.PrometheusMeterRegistry; |
| import io.prometheus.client.exporter.BasicAuthHttpConnectionFactory; |
| import io.prometheus.client.exporter.PushGateway; |
| import org.apache.dubbo.common.URL; |
| import org.apache.dubbo.common.logger.Logger; |
| import org.apache.dubbo.common.logger.LoggerFactory; |
| import org.apache.dubbo.common.utils.NamedThreadFactory; |
| import org.apache.dubbo.common.utils.StringUtils; |
| import org.apache.dubbo.metrics.AbstractMetricsReporter; |
| import org.apache.dubbo.rpc.model.ApplicationModel; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.net.InetSocketAddress; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.TimeUnit; |
| |
| import static org.apache.dubbo.common.constants.MetricsConstants.PROMETHEUS_EXPORTER_ENABLED_KEY; |
| import static org.apache.dubbo.common.constants.MetricsConstants.PROMETHEUS_EXPORTER_METRICS_PORT_KEY; |
| import static org.apache.dubbo.common.constants.MetricsConstants.PROMETHEUS_DEFAULT_METRICS_PORT; |
| import static org.apache.dubbo.common.constants.MetricsConstants.PROMETHEUS_EXPORTER_METRICS_PATH_KEY; |
| import static org.apache.dubbo.common.constants.MetricsConstants.PROMETHEUS_DEFAULT_METRICS_PATH; |
| import static org.apache.dubbo.common.constants.MetricsConstants.PROMETHEUS_PUSHGATEWAY_ENABLED_KEY; |
| import static org.apache.dubbo.common.constants.MetricsConstants.PROMETHEUS_PUSHGATEWAY_BASE_URL_KEY; |
| import static org.apache.dubbo.common.constants.MetricsConstants.PROMETHEUS_PUSHGATEWAY_JOB_KEY; |
| import static org.apache.dubbo.common.constants.MetricsConstants.PROMETHEUS_DEFAULT_JOB_NAME; |
| import static org.apache.dubbo.common.constants.MetricsConstants.PROMETHEUS_PUSHGATEWAY_PUSH_INTERVAL_KEY; |
| import static org.apache.dubbo.common.constants.MetricsConstants.PROMETHEUS_DEFAULT_PUSH_INTERVAL; |
| import static org.apache.dubbo.common.constants.MetricsConstants.PROMETHEUS_PUSHGATEWAY_USERNAME_KEY; |
| import static org.apache.dubbo.common.constants.MetricsConstants.PROMETHEUS_PUSHGATEWAY_PASSWORD_KEY; |
| |
| /** |
| * Metrics reporter for prometheus. |
| */ |
| public class PrometheusMetricsReporter extends AbstractMetricsReporter { |
| |
| private final Logger logger = LoggerFactory.getLogger(PrometheusMetricsReporter.class); |
| |
| private final PrometheusMeterRegistry prometheusRegistry = new PrometheusMeterRegistry(PrometheusConfig.DEFAULT); |
| private ScheduledExecutorService pushJobExecutor = null; |
| private HttpServer prometheusExporterHttpServer = null; |
| private Thread httpServerThread = null; |
| |
| public PrometheusMetricsReporter(URL url, ApplicationModel applicationModel) { |
| super(url, applicationModel); |
| } |
| |
| @Override |
| public void doInit() { |
| addMeterRegistry(prometheusRegistry); |
| exportHttpServer(); |
| schedulePushJob(); |
| } |
| |
| private void exportHttpServer() { |
| boolean exporterEnabled = url.getParameter(PROMETHEUS_EXPORTER_ENABLED_KEY, false); |
| if (exporterEnabled) { |
| int port = url.getParameter(PROMETHEUS_EXPORTER_METRICS_PORT_KEY, PROMETHEUS_DEFAULT_METRICS_PORT); |
| String path = url.getParameter(PROMETHEUS_EXPORTER_METRICS_PATH_KEY, PROMETHEUS_DEFAULT_METRICS_PATH); |
| if (!path.startsWith("/")) { |
| path = "/" + path; |
| } |
| |
| try { |
| prometheusExporterHttpServer = HttpServer.create(new InetSocketAddress(port), 0); |
| prometheusExporterHttpServer.createContext(path, httpExchange -> { |
| String response = prometheusRegistry.scrape(); |
| httpExchange.sendResponseHeaders(200, response.getBytes().length); |
| try (OutputStream os = httpExchange.getResponseBody()) { |
| os.write(response.getBytes()); |
| } |
| }); |
| |
| httpServerThread = new Thread(prometheusExporterHttpServer::start); |
| httpServerThread.start(); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| |
| private void schedulePushJob() { |
| boolean pushEnabled = url.getParameter(PROMETHEUS_PUSHGATEWAY_ENABLED_KEY, false); |
| if (pushEnabled) { |
| String baseUrl = url.getParameter(PROMETHEUS_PUSHGATEWAY_BASE_URL_KEY); |
| String job = url.getParameter(PROMETHEUS_PUSHGATEWAY_JOB_KEY, PROMETHEUS_DEFAULT_JOB_NAME); |
| int pushInterval = url.getParameter(PROMETHEUS_PUSHGATEWAY_PUSH_INTERVAL_KEY, PROMETHEUS_DEFAULT_PUSH_INTERVAL); |
| String username = url.getParameter(PROMETHEUS_PUSHGATEWAY_USERNAME_KEY); |
| String password = url.getParameter(PROMETHEUS_PUSHGATEWAY_PASSWORD_KEY); |
| |
| NamedThreadFactory threadFactory = new NamedThreadFactory("prometheus-push-job", true); |
| pushJobExecutor = Executors.newScheduledThreadPool(1, threadFactory); |
| PushGateway pushGateway = new PushGateway(baseUrl); |
| if (!StringUtils.isBlank(username)) { |
| pushGateway.setConnectionFactory(new BasicAuthHttpConnectionFactory(username, password)); |
| } |
| |
| pushJobExecutor.scheduleWithFixedDelay(() -> push(pushGateway, job), pushInterval, pushInterval, TimeUnit.SECONDS); |
| } |
| } |
| |
| protected void push(PushGateway pushGateway, String job) { |
| try { |
| pushGateway.pushAdd(prometheusRegistry.getPrometheusRegistry(), job); |
| } catch (IOException e) { |
| logger.error("Error occurred when pushing metrics to prometheus: ", e); |
| } |
| } |
| |
| @Override |
| public void doDestroy() { |
| if (prometheusExporterHttpServer != null) { |
| prometheusExporterHttpServer.stop(1); |
| } |
| |
| if (httpServerThread != null) { |
| httpServerThread.interrupt(); |
| } |
| |
| if (pushJobExecutor != null) { |
| pushJobExecutor.shutdownNow(); |
| } |
| } |
| |
| /** |
| * ut only |
| */ |
| @Deprecated |
| public ScheduledExecutorService getPushJobExecutor() { |
| return pushJobExecutor; |
| } |
| |
| /** |
| * ut only |
| */ |
| @Deprecated |
| public PrometheusMeterRegistry getPrometheusRegistry() { |
| return prometheusRegistry; |
| } |
| } |