Github user uce commented on a diff in the pull request: https://github.com/apache/flink/pull/3460#discussion_r106900609 --- Diff: flink-runtime-web/src/main/java/org/apache/flink/runtime/webmonitor/history/HistoryServer.java --- @@ -0,0 +1,293 @@ +/* + * 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.flink.runtime.webmonitor.history; + +import io.netty.handler.codec.http.router.Router; +import org.apache.flink.api.java.utils.ParameterTool; +import org.apache.flink.configuration.Configuration; +import org.apache.flink.configuration.GlobalConfiguration; +import org.apache.flink.configuration.HistoryServerOptions; +import org.apache.flink.core.fs.FileSystem; +import org.apache.flink.core.fs.Path; +import org.apache.flink.runtime.history.FsJobArchivist; +import org.apache.flink.runtime.net.SSLUtils; +import org.apache.flink.runtime.security.SecurityUtils; +import org.apache.flink.runtime.webmonitor.handlers.DashboardConfigHandler; +import org.apache.flink.runtime.webmonitor.utils.WebFrontendBootstrap; +import org.apache.flink.util.FileUtils; +import org.apache.flink.util.FlinkException; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import javax.net.ssl.SSLContext; +import java.io.File; +import java.io.FileWriter; +import java.io.IOException; +import java.lang.reflect.UndeclaredThrowableException; +import java.nio.file.Files; +import java.util.ArrayList; +import java.util.List; +import java.util.UUID; +import java.util.concurrent.Callable; +import java.util.concurrent.CountDownLatch; +import java.util.concurrent.atomic.AtomicBoolean; + +/** + * The HistoryServer provides a WebInterface and REST API to retrieve information about finished jobs for which + * the JobManager may have already shut down. + * + * The HistoryServer regularly checks a set of directories for job archives created by the {@link FsJobArchivist} and + * caches these in a local directory. See {@link HistoryServerArchiveFetcher}. + * + * All configuration options are defined in{@link HistoryServerOptions}. + * + * The WebInterface only displays the "Completed Jobs" page. + * + * The REST API is limited to + * <ul> + * <li>/config</li> + * <li>/joboverview</li> + * <li>/jobs/:jobid/*</li> + * </ul> + * and relies on static files that are served by the {@link HistoryServerStaticFileServerHandler}. + */ +public class HistoryServer { + + private static final Logger LOG = LoggerFactory.getLogger(HistoryServer.class); + + private final String webAddress; + private final int webPort; + private final long webRefreshIntervalMillis; + private final File webDir; + + private final HistoryServerArchiveFetcher archiveFetcher; + + private final SSLContext serverSSLContext; + private WebFrontendBootstrap netty; + + private final Object startupShutdownLock = new Object(); + private final AtomicBoolean shutdownRequested = new AtomicBoolean(false); + private final Thread shutdownHook; + + public static void main(String[] args) throws Exception { + ParameterTool pt = ParameterTool.fromArgs(args); + String configDir = pt.getRequired("configDir"); + + LOG.info("Loading configuration from {}", configDir); + final Configuration flinkConfig = GlobalConfiguration.loadConfiguration(configDir); + + // run the history server + SecurityUtils.install(new SecurityUtils.SecurityConfiguration(flinkConfig)); + + try { + SecurityUtils.getInstalledContext().runSecured(new Callable<Integer>() { + @Override + public Integer call() throws Exception { + HistoryServer hs = new HistoryServer(flinkConfig); + hs.run(); + return 0; + } + }); + System.exit(0); + } catch (UndeclaredThrowableException ute) { + Throwable cause = ute. getUndeclaredThrowable(); + LOG.error("Failed to run HistoryServer.", cause); + cause.printStackTrace(); + System.exit(1); + } catch (Exception e) { + LOG.error("Failed to run HistoryServer.", e); + e.printStackTrace(); + System.exit(1); + } + } + + public HistoryServer(Configuration config) throws IOException, FlinkException { + if (config.getBoolean(HistoryServerOptions.HISTORY_SERVER_WEB_SSL_ENABLED) && SSLUtils.getSSLEnabled(config)) { + LOG.info("Enabling ssl for the history server."); --- End diff -- ssl => `SSL`
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