| // 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.cloudstack.metrics; |
| |
| import com.cloud.utils.component.ManagerBase; |
| import com.sun.net.httpserver.HttpExchange; |
| import com.sun.net.httpserver.HttpHandler; |
| import com.sun.net.httpserver.HttpServer; |
| import org.apache.cloudstack.framework.config.ConfigKey; |
| import org.apache.cloudstack.framework.config.Configurable; |
| import org.apache.log4j.Logger; |
| |
| import javax.inject.Inject; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.net.InetSocketAddress; |
| import java.util.Arrays; |
| |
| public class PrometheusExporterServerImpl extends ManagerBase implements PrometheusExporterServer, Configurable { |
| private static final Logger LOG = Logger.getLogger(PrometheusExporterServerImpl.class); |
| |
| private static HttpServer httpServer; |
| |
| @Inject |
| private PrometheusExporter prometheusExporter; |
| |
| private final static class ExporterHandler implements HttpHandler { |
| private PrometheusExporter prometheusExporter; |
| |
| ExporterHandler(final PrometheusExporter prometheusExporter) { |
| super(); |
| this.prometheusExporter = prometheusExporter; |
| } |
| |
| @Override |
| public void handle(final HttpExchange httpExchange) throws IOException { |
| final String remoteClientAddress = httpExchange.getRemoteAddress().getAddress().toString().replace("/", ""); |
| LOG.debug("Prometheus exporter received client request from: " + remoteClientAddress); |
| String response = "Forbidden"; |
| int responseCode = 403; |
| if (Arrays.asList(PrometheusExporterAllowedAddresses.value().split(",")).contains(remoteClientAddress)) { |
| prometheusExporter.updateMetrics(); |
| response = prometheusExporter.getMetrics(); |
| responseCode = 200; |
| } |
| httpExchange.getResponseHeaders().set("Content-Type", "text/plain"); |
| httpExchange.sendResponseHeaders(responseCode, response.length()); |
| final OutputStream os = httpExchange.getResponseBody(); |
| os.write(response.getBytes()); |
| os.close(); |
| } |
| } |
| |
| @Override |
| public boolean start() { |
| if (EnablePrometheusExporter.value()) { |
| try { |
| httpServer = HttpServer.create(new InetSocketAddress(PrometheusExporterServerPort.value()), 0); |
| httpServer.createContext("/metrics", new ExporterHandler(prometheusExporter)); |
| httpServer.createContext("/", new HttpHandler() { |
| @Override |
| public void handle(HttpExchange httpExchange) throws IOException { |
| final String response = "<html><head><title>CloudStack Exporter</title></head>" + |
| "<body><h1>CloudStack Exporter</h1>" + |
| "<p><a href=\"/metrics\">Metrics</a></p>" + |
| "</body></html>"; |
| httpExchange.sendResponseHeaders(200, response.length()); |
| final OutputStream os = httpExchange.getResponseBody(); |
| os.write(response.getBytes()); |
| os.close(); |
| } |
| }); |
| httpServer.start(); |
| LOG.debug("Started prometheus exporter http server"); |
| } catch (final IOException e) { |
| LOG.info("Failed to start prometheus exporter http server due to: ", e); |
| } |
| } |
| return true; |
| } |
| |
| @Override |
| public boolean stop() { |
| if (httpServer != null) { |
| httpServer.stop(0); |
| LOG.debug("Stopped Prometheus exporter http server"); |
| } |
| return true; |
| } |
| |
| @Override |
| public String getConfigComponentName() { |
| return PrometheusExporter.class.getSimpleName(); |
| } |
| |
| @Override |
| public ConfigKey<?>[] getConfigKeys() { |
| return new ConfigKey<?>[] { |
| EnablePrometheusExporter, |
| PrometheusExporterServerPort, |
| PrometheusExporterAllowedAddresses |
| }; |
| } |
| } |