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From GitBox <...@apache.org>
Subject [GitHub] kl0u commented on a change in pull request #7003: [FLINK-10633][prometheus] Add E2E test
Date Fri, 02 Nov 2018 15:19:27 GMT
kl0u commented on a change in pull request #7003: [FLINK-10633][prometheus] Add E2E test
URL: https://github.com/apache/flink/pull/7003#discussion_r230409384
 
 

 ##########
 File path: flink-end-to-end-tests/flink-end-to-end-tests-common/src/main/java/org/apache/flink/tests/util/FlinkDistribution.java
 ##########
 @@ -0,0 +1,219 @@
+/*
+ * 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.tests.util;
+
+import org.apache.flink.configuration.Configuration;
+import org.apache.flink.configuration.GlobalConfiguration;
+import org.apache.flink.configuration.UnmodifiableConfiguration;
+import org.apache.flink.util.ExceptionUtils;
+
+import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.JsonNode;
+import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.ObjectMapper;
+
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.Response;
+import org.junit.Assert;
+import org.junit.rules.ExternalResource;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.BufferedReader;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Optional;
+import java.util.function.Function;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+/**
+ * A wrapper around a Flink distribution.
+ */
+public final class FlinkDistribution extends ExternalResource {
+
+	private static final Logger LOG = LoggerFactory.getLogger(FlinkDistribution.class);
+
+	private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
+
+	private final List<AutoClosablePath> filesToDelete = new ArrayList<>(4);
+
+	private static final Path FLINK_CONF_YAML = Paths.get("flink-conf.yaml");
+	private static final Path FLINK_CONF_YAML_BACKUP = Paths.get("flink-conf.yaml.bak");
+
+	private final Path opt;
+	private final Path lib;
+	private final Path conf;
+	private final Path log;
+	private final Path bin;
+
+	private Configuration defaultConfig;
+
+	public FlinkDistribution() {
+		final String distDirProperty = System.getProperty("distDir");
+		if (distDirProperty == null) {
+			Assert.fail("The distDir property was not set. You can set it when running maven via -DdistDir=<path>
.");
+		}
+		final Path flinkDir = Paths.get(distDirProperty);
+		bin = flinkDir.resolve("bin");
+		opt = flinkDir.resolve("opt");
+		lib = flinkDir.resolve("lib");
+		conf = flinkDir.resolve("conf");
+		log = flinkDir.resolve("log");
+	}
+
+	@Override
+	protected void before() throws IOException {
+		defaultConfig = new UnmodifiableConfiguration(GlobalConfiguration.loadConfiguration(conf.toAbsolutePath().toString()));
+		final Path originalConfig = conf.resolve(FLINK_CONF_YAML);
+		final Path backupConfig = conf.resolve(FLINK_CONF_YAML_BACKUP);
+		Files.copy(originalConfig, backupConfig);
+		filesToDelete.add(new AutoClosablePath(backupConfig));
+	}
+
+	@Override
+	protected void after() {
+		try {
+			stopFlinkCluster();
+		} catch (IOException e) {
+			LOG.error("Failure while shutting down Flink cluster.", e);
+		}
+
+		final Path originalConfig = conf.resolve(FLINK_CONF_YAML);
+		final Path backupConfig = conf.resolve(FLINK_CONF_YAML_BACKUP);
+
+		try {
+			Files.move(backupConfig, originalConfig, StandardCopyOption.REPLACE_EXISTING);
+		} catch (IOException e) {
+			LOG.error("Failed to restore flink-conf.yaml", e);
+		}
+
+		for (AutoCloseable fileToDelete : filesToDelete) {
+			try {
+				fileToDelete.close();
+			} catch (Exception e) {
+				LOG.error("Failure while cleaning up file.", e);
+			}
+		}
+	}
+
+	public void startFlinkCluster() throws IOException {
+		AutoClosableProcess.runBlocking("Start Flink cluster", bin.resolve("start-cluster.sh").toAbsolutePath().toString());
+
+		final OkHttpClient client = new OkHttpClient();
+
+		final Request request = new Request.Builder()
+			.get()
+			.url("http://localhost:8081/taskmanagers")
+			.build();
+
+		Exception reportedException = null;
+		for (int x = 0; x < 30; x++) {
+			try (Response response = client.newCall(request).execute()) {
+				if (response.isSuccessful()) {
+					final String json = response.body().string();
+					final JsonNode taskManagerList = OBJECT_MAPPER.readTree(json)
+						.get("taskmanagers");
+
+					if (taskManagerList != null && taskManagerList.size() > 0) {
+						LOG.info("Dispatcher REST endpoint is up.");
+						return;
+					}
+				}
+			} catch (IOException ioe) {
+				reportedException = ExceptionUtils.firstOrSuppressed(ioe, reportedException);
+			}
+
+			LOG.info("Waiting for dispatcher REST endpoint to come up...");
+			try {
+				Thread.sleep(1000);
+			} catch (InterruptedException e) {
+				Thread.currentThread().interrupt();
+				reportedException = ExceptionUtils.firstOrSuppressed(e, reportedException);
+			}
+		}
+		throw new AssertionError("Dispatcher REST endpoint did not start in time.", reportedException);
+	}
+
+	public void stopFlinkCluster() throws IOException {
+		AutoClosableProcess.runBlocking("Stop Flink Cluster", bin.resolve("stop-cluster.sh").toAbsolutePath().toString());
+	}
+
+	public void copyOptJarsToLib(String jarNamePattern) throws FileNotFoundException, IOException
{
+		final Optional<Path> reporterJarOptional = Files.walk(opt)
+			.filter(path -> path.getFileName().toString().startsWith("flink-metrics-prometheus"))
+			.findFirst();
+		if (reporterJarOptional.isPresent()) {
+			final Path optReporterJar = reporterJarOptional.get();
+			final Path libReporterJar = lib.resolve(optReporterJar.getFileName());
+			Files.copy(optReporterJar, libReporterJar);
+			filesToDelete.add(new AutoClosablePath(libReporterJar));
+		} else {
+			throw new FileNotFoundException("No jar could be found matching the pattern " + jarNamePattern
+ ".");
+		}
+	}
+
+	public void appendConfiguration(Configuration config) throws IOException {
+		final Configuration mergedConfig = new Configuration();
+		mergedConfig.addAll(defaultConfig);
+		mergedConfig.addAll(config);
+
+		final List<String> configurationLines = mergedConfig.toMap().entrySet().stream()
+			.map(entry -> entry.getKey() + ": " + entry.getValue())
+			.collect(Collectors.toList());
+
+		Files.write(conf.resolve("flink-conf.yaml"), configurationLines);
+	}
+
+	public Stream<String> searchAllLogs(Pattern pattern, Function<Matcher, String>
matchProcessor) throws IOException {
 
 Review comment:
   Can be a future JIRA, but it could make sense to have a separate class with log parsing
utilities, instead of putting it here with the `startCluster`, `stopCluster`...

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