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+/**
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+ * Licensed to the Apache Software Foundation (ASF) under one
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+ * or more contributor license agreements. See the NOTICE file
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+ * distributed with this work for additional information
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+ * regarding copyright ownership. The ASF licenses this file
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+ * to you under the Apache License, Version 2.0 (the
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+ * "License"); you may not use this file except in compliance
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+ * with the License. You may obtain a copy of the License at
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+ *
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+ * http://www.apache.org/licenses/LICENSE-2.0
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+ *
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+ * Unless required by applicable law or agreed to in writing, software
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+ * distributed under the License is distributed on an "AS IS" BASIS,
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+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+ * See the License for the specific language governing permissions and
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+ * limitations under the License.
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+ */
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+package org.apache.hadoop.hdfs.tools.offlineImageViewer;
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+
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+import org.apache.hadoop.conf.Configuration;
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+import org.apache.hadoop.fs.FSDataOutputStream;
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+import org.apache.hadoop.fs.Path;
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+import org.apache.hadoop.hdfs.DFSConfigKeys;
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+import org.apache.hadoop.hdfs.DFSTestUtil;
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+import org.apache.hadoop.hdfs.DistributedFileSystem;
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+import org.apache.hadoop.hdfs.MiniDFSCluster;
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+import org.apache.hadoop.hdfs.protocol.HdfsConstants;
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+import org.apache.hadoop.hdfs.server.namenode.FSImageTestUtil;
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+import org.junit.AfterClass;
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+import org.junit.BeforeClass;
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+import org.junit.Test;
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+import org.slf4j.Logger;
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+import org.slf4j.LoggerFactory;
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+
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+import java.io.BufferedReader;
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+import java.io.File;
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+import java.io.FileInputStream;
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+import java.io.IOException;
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+import java.io.InputStream;
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+import java.io.InputStreamReader;
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+
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+import static org.junit.Assert.assertEquals;
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+
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+/**
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+ * Tests OfflineImageViewer if the input fsimage has HDFS ErasureCodingPolicy
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+ * entries.
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+ */
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+public class TestOfflineImageViewerForErasureCodingPolicy {
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+
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+ private static final Logger LOG =
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+ LoggerFactory.getLogger(TestOfflineImageViewerForErasureCodingPolicy.class);
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+
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+ private static File originalFsimage = null;
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+ private static File tempDir;
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+
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+ /**
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+ * Create a populated namespace for later testing. Save its contents to a
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+ * data structure and store its fsimage location.
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+ */
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+ @BeforeClass
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+ public static void createOriginalFSImage() throws IOException {
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+ MiniDFSCluster cluster = null;
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+ try {
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+ Configuration conf = new Configuration();
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+ conf.setBoolean(DFSConfigKeys.DFS_NAMENODE_ACLS_ENABLED_KEY, true);
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+ conf.setBoolean(DFSConfigKeys.DFS_STORAGE_POLICY_ENABLED_KEY, true);
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+
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+ File[] nnDirs = MiniDFSCluster.getNameNodeDirectory(
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+ MiniDFSCluster.getBaseDirectory(), 0, 0);
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+ tempDir = nnDirs[0];
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+
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+ cluster = new MiniDFSCluster.Builder(conf).numDataNodes(10).build();
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+ cluster.waitActive();
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+ DistributedFileSystem hdfs = cluster.getFileSystem();
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+
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+ hdfs.enableErasureCodingPolicy("RS-6-3-1024k");
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+ hdfs.enableErasureCodingPolicy("RS-3-2-1024k");
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+
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+ Path dir = new Path("/dir_wo_ec_rs63");
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+ hdfs.mkdirs(dir);
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+ hdfs.setErasureCodingPolicy(dir, "RS-6-3-1024k");
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+
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+ dir = new Path("/dir_wo_ec_rs63/sub_dir_1");
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+ hdfs.mkdirs(dir);
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+
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+ dir = new Path("/dir_wo_ec_rs63/sub_dir_2");
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+ hdfs.mkdirs(dir);
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+
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+ Path file = new Path("/dir_wo_ec_rs63/file_wo_ec_1");
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+ try (FSDataOutputStream o = hdfs.create(file)) {
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+ o.write(123);
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+ }
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+
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+ file = new Path("/dir_wo_ec_rs63/file_wo_ec_2");
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+ try (FSDataOutputStream o = hdfs.create(file)) {
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+ o.write(123);
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+ }
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+
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+ dir = new Path("/dir_wo_ec_rs32");
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+ hdfs.mkdirs(dir);
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+ hdfs.setErasureCodingPolicy(dir, "RS-3-2-1024k");
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+
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+ dir = new Path("/dir_wo_ec_rs32/sub_dir_1");
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+ hdfs.mkdirs(dir);
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+
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+ file = new Path("/dir_wo_ec_rs32/file_wo_ec");
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+ try (FSDataOutputStream o = hdfs.create(file)) {
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+ o.write(123);
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+ }
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+
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+ dir = new Path("/dir_wo_rep");
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+ hdfs.mkdirs(dir);
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+
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+ dir = new Path("/dir_wo_rep/sub_dir_1");
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+ hdfs.mkdirs(dir);
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+
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+ file = new Path("/dir_wo_rep/file_rep");
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+ try (FSDataOutputStream o = hdfs.create(file)) {
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+ o.write(123);
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+ }
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+
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+ // Write results to the fsimage file
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+ hdfs.setSafeMode(HdfsConstants.SafeModeAction.SAFEMODE_ENTER, false);
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+ hdfs.saveNamespace();
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+
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+ // Determine the location of the fsimage file
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+ originalFsimage = FSImageTestUtil.findLatestImageFile(FSImageTestUtil
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+ .getFSImage(cluster.getNameNode()).getStorage().getStorageDir(0));
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+ if (originalFsimage == null) {
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+ throw new RuntimeException("Didn't generate or can't find fsimage");
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+ }
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+ LOG.debug("original FS image file is " + originalFsimage);
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+ } finally {
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+ if (cluster != null) {
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+ cluster.shutdown();
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+ }
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+ }
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+ }
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+
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+ @AfterClass
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+ public static void deleteOriginalFSImage() throws IOException {
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+ if (originalFsimage != null && originalFsimage.exists()) {
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+ originalFsimage.delete();
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+ }
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+ }
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+
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+ @Test
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+ public void testPBDelimitedWriterForErasureCodingPolicy() throws Exception {
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+ String expected = DFSTestUtil.readResoucePlainFile(
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+ "testErasureCodingPolicy.csv");
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+ String result = readECPolicyFromFsimageFile();
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+ assertEquals(expected, result);
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+ }
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+
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+ private String readECPolicyFromFsimageFile() throws Exception {
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+ StringBuilder builder = new StringBuilder();
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+ String delemiter = "\t";
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+
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+ File delimitedOutput = new File(tempDir, "delimitedOutput");
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+
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+ if (OfflineImageViewerPB.run(new String[] {"-p", "Delimited",
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+ "-i", originalFsimage.getAbsolutePath(),
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+ "-o", delimitedOutput.getAbsolutePath(),
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+ "-ec"}) != 0) {
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+ throw new IOException("oiv returned failure creating " +
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+ "delimited output with ec.");
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+ }
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+
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+ try (InputStream input = new FileInputStream(delimitedOutput);
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+ BufferedReader reader =
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+ new BufferedReader(new InputStreamReader(input))) {
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+ String line;
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+ boolean header = true;
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+ while ((line = reader.readLine()) != null) {
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+ String[] fields = line.split(delemiter);
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+ if (!header) {
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+ String path = fields[0];
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+ String ecPolicy = fields[12];
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+ builder.append(path).append(",").append(ecPolicy).append("\n");
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+ }
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+ header = false;
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+ }
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+ }
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+ return builder.toString();
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+ }
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+}
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