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19 package org.apache.hadoop.hbase.snapshot;
20
21 import static org.junit.Assert.assertEquals;
22 import static org.junit.Assert.assertTrue;
23
24 import java.io.IOException;
25 import java.net.URI;
26 import java.util.ArrayList;
27 import java.util.Arrays;
28 import java.util.HashSet;
29 import java.util.List;
30 import java.util.Set;
31
32 import org.apache.commons.logging.Log;
33 import org.apache.commons.logging.LogFactory;
34 import org.apache.hadoop.conf.Configuration;
35 import org.apache.hadoop.fs.FSDataOutputStream;
36 import org.apache.hadoop.fs.FileStatus;
37 import org.apache.hadoop.fs.FileSystem;
38 import org.apache.hadoop.fs.FileUtil;
39 import org.apache.hadoop.fs.Path;
40 import org.apache.hadoop.hbase.HBaseTestingUtility;
41 import org.apache.hadoop.hbase.HColumnDescriptor;
42 import org.apache.hadoop.hbase.HConstants;
43 import org.apache.hadoop.hbase.HRegionInfo;
44 import org.apache.hadoop.hbase.HTableDescriptor;
45 import org.apache.hadoop.hbase.MediumTests;
46 import org.apache.hadoop.hbase.TableName;
47 import org.apache.hadoop.hbase.client.HBaseAdmin;
48 import org.apache.hadoop.hbase.client.HTable;
49 import org.apache.hadoop.hbase.master.snapshot.SnapshotManager;
50 import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription;
51 import org.apache.hadoop.hbase.regionserver.HRegionFileSystem;
52 import org.apache.hadoop.hbase.util.Bytes;
53 import org.apache.hadoop.hbase.util.FSUtils;
54 import org.apache.hadoop.hbase.util.Pair;
55 import org.junit.After;
56 import org.junit.AfterClass;
57 import org.junit.Before;
58 import org.junit.BeforeClass;
59 import org.junit.Test;
60 import org.junit.experimental.categories.Category;
61
62
63
64
65 @Category(MediumTests.class)
66 public class TestExportSnapshot {
67 private final Log LOG = LogFactory.getLog(getClass());
68
69 protected final static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
70
71 private final static byte[] FAMILY = Bytes.toBytes("cf");
72
73 private byte[] emptySnapshotName;
74 private byte[] snapshotName;
75 private TableName tableName;
76 private HBaseAdmin admin;
77
78 public static void setUpBaseConf(Configuration conf) {
79 conf.setBoolean(SnapshotManager.HBASE_SNAPSHOT_ENABLED, true);
80 conf.setInt("hbase.regionserver.msginterval", 100);
81 conf.setInt("hbase.client.pause", 250);
82 conf.setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER, 6);
83 conf.setBoolean("hbase.master.enabletable.roundrobin", true);
84 conf.setInt("mapreduce.map.max.attempts", 10);
85 conf.setInt("mapred.map.max.attempts", 10);
86 }
87
88 @BeforeClass
89 public static void setUpBeforeClass() throws Exception {
90 setUpBaseConf(TEST_UTIL.getConfiguration());
91 TEST_UTIL.startMiniCluster(3);
92 TEST_UTIL.startMiniMapReduceCluster();
93 }
94
95 @AfterClass
96 public static void tearDownAfterClass() throws Exception {
97 TEST_UTIL.shutdownMiniMapReduceCluster();
98 TEST_UTIL.shutdownMiniCluster();
99 }
100
101
102
103
104 @Before
105 public void setUp() throws Exception {
106 this.admin = TEST_UTIL.getHBaseAdmin();
107
108 long tid = System.currentTimeMillis();
109 tableName = TableName.valueOf("testtb-" + tid);
110 snapshotName = Bytes.toBytes("snaptb0-" + tid);
111 emptySnapshotName = Bytes.toBytes("emptySnaptb0-" + tid);
112
113
114 SnapshotTestingUtils.createTable(TEST_UTIL, tableName, FAMILY);
115
116
117 admin.snapshot(emptySnapshotName, tableName);
118
119
120 HTable table = new HTable(TEST_UTIL.getConfiguration(), tableName);
121 SnapshotTestingUtils.loadData(TEST_UTIL, tableName, 1000, FAMILY);
122
123
124 admin.snapshot(snapshotName, tableName);
125 }
126
127 @After
128 public void tearDown() throws Exception {
129 TEST_UTIL.deleteTable(tableName);
130 SnapshotTestingUtils.deleteAllSnapshots(TEST_UTIL.getHBaseAdmin());
131 SnapshotTestingUtils.deleteArchiveDirectory(TEST_UTIL);
132 }
133
134
135
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138
139
140
141
142
143
144 @Test
145 public void testBalanceSplit() throws Exception {
146
147 List<Pair<Path, Long>> files = new ArrayList<Pair<Path, Long>>();
148 for (long i = 0; i <= 20; i++) {
149 files.add(new Pair<Path, Long>(new Path("file-" + i), i));
150 }
151
152
153
154
155
156
157
158 List<List<Path>> splits = ExportSnapshot.getBalancedSplits(files, 5);
159 assertEquals(5, splits.size());
160 assertEquals(Arrays.asList(new Path("file-20"), new Path("file-11"),
161 new Path("file-10"), new Path("file-1"), new Path("file-0")), splits.get(0));
162 assertEquals(Arrays.asList(new Path("file-19"), new Path("file-12"),
163 new Path("file-9"), new Path("file-2")), splits.get(1));
164 assertEquals(Arrays.asList(new Path("file-18"), new Path("file-13"),
165 new Path("file-8"), new Path("file-3")), splits.get(2));
166 assertEquals(Arrays.asList(new Path("file-17"), new Path("file-14"),
167 new Path("file-7"), new Path("file-4")), splits.get(3));
168 assertEquals(Arrays.asList(new Path("file-16"), new Path("file-15"),
169 new Path("file-6"), new Path("file-5")), splits.get(4));
170 }
171
172
173
174
175 @Test
176 public void testExportFileSystemState() throws Exception {
177 testExportFileSystemState(tableName, snapshotName, 2);
178 }
179
180 @Test
181 public void testEmptyExportFileSystemState() throws Exception {
182 testExportFileSystemState(tableName, emptySnapshotName, 1);
183 }
184
185 @Test
186 public void testConsecutiveExports() throws Exception {
187 Path copyDir = getLocalDestinationDir();
188 testExportFileSystemState(tableName, snapshotName, 2, copyDir, false);
189 testExportFileSystemState(tableName, snapshotName, 2, copyDir, true);
190 removeExportDir(copyDir);
191 }
192
193
194
195
196
197 @Test
198 public void testSnapshotWithRefsExportFileSystemState() throws Exception {
199 Configuration conf = TEST_UTIL.getConfiguration();
200
201 final TableName tableWithRefsName =
202 TableName.valueOf("tableWithRefs");
203 final String snapshotName = "tableWithRefs";
204 final String TEST_FAMILY = Bytes.toString(FAMILY);
205 final String TEST_HFILE = "abc";
206
207 final SnapshotDescription sd = SnapshotDescription.newBuilder()
208 .setName(snapshotName)
209 .setTable(tableWithRefsName.getNameAsString()).build();
210
211 FileSystem fs = TEST_UTIL.getHBaseCluster().getMaster().getMasterFileSystem().getFileSystem();
212 Path rootDir = TEST_UTIL.getHBaseCluster().getMaster().getMasterFileSystem().getRootDir();
213 Path archiveDir = new Path(rootDir, HConstants.HFILE_ARCHIVE_DIRECTORY);
214
215
216 HRegionInfo hri = new HRegionInfo(tableWithRefsName);
217 HRegionFileSystem r0fs = HRegionFileSystem.createRegionOnFileSystem(conf,
218 fs, FSUtils.getTableDir(archiveDir, hri.getTable()), hri);
219 Path storeFile = new Path(rootDir, TEST_HFILE);
220 FSDataOutputStream out = fs.create(storeFile);
221 out.write(Bytes.toBytes("Test Data"));
222 out.close();
223 r0fs.commitStoreFile(TEST_FAMILY, storeFile);
224
225
226
227 hri = new HRegionInfo(tableWithRefsName);
228 HRegionFileSystem r1fs = HRegionFileSystem.createRegionOnFileSystem(conf,
229 fs, new Path(archiveDir, hri.getTable().getNameAsString()), hri);
230 storeFile = new Path(rootDir, TEST_HFILE + '.' + r0fs.getRegionInfo().getEncodedName());
231 out = fs.create(storeFile);
232 out.write(Bytes.toBytes("Test Data"));
233 out.close();
234 r1fs.commitStoreFile(TEST_FAMILY, storeFile);
235
236 Path tableDir = FSUtils.getTableDir(archiveDir, tableWithRefsName);
237 Path snapshotDir = SnapshotDescriptionUtils.getCompletedSnapshotDir(snapshotName, rootDir);
238 FileUtil.copy(fs, tableDir, fs, snapshotDir, false, conf);
239 SnapshotDescriptionUtils.writeSnapshotInfo(sd, snapshotDir, fs);
240
241 testExportFileSystemState(tableWithRefsName, Bytes.toBytes(snapshotName), 2);
242 }
243
244 private void testExportFileSystemState(final TableName tableName, final byte[] snapshotName,
245 int filesExpected) throws Exception {
246 Path copyDir = getHdfsDestinationDir();
247 testExportFileSystemState(tableName, snapshotName, filesExpected, copyDir, false);
248 removeExportDir(copyDir);
249 }
250
251
252
253
254 private void testExportFileSystemState(final TableName tableName, final byte[] snapshotName,
255 int filesExpected, Path copyDir, boolean overwrite) throws Exception {
256 URI hdfsUri = FileSystem.get(TEST_UTIL.getConfiguration()).getUri();
257 FileSystem fs = FileSystem.get(copyDir.toUri(), new Configuration());
258 copyDir = copyDir.makeQualified(fs);
259
260 List<String> opts = new ArrayList<String>();
261 opts.add("-snapshot");
262 opts.add(Bytes.toString(snapshotName));
263 opts.add("-copy-to");
264 opts.add(copyDir.toString());
265 if (overwrite) opts.add("-overwrite");
266
267
268 int res = ExportSnapshot.innerMain(TEST_UTIL.getConfiguration(),
269 opts.toArray(new String[opts.size()]));
270 assertEquals(0, res);
271
272
273 FileStatus[] rootFiles = fs.listStatus(copyDir);
274 assertEquals(filesExpected, rootFiles.length);
275 for (FileStatus fileStatus: rootFiles) {
276 String name = fileStatus.getPath().getName();
277 assertTrue(fileStatus.isDir());
278 assertTrue(name.equals(HConstants.SNAPSHOT_DIR_NAME) ||
279 name.equals(HConstants.HFILE_ARCHIVE_DIRECTORY));
280 }
281
282
283 final FileSystem hdfs = FileSystem.get(hdfsUri, TEST_UTIL.getConfiguration());
284 final Path snapshotDir = new Path(HConstants.SNAPSHOT_DIR_NAME, Bytes.toString(snapshotName));
285 verifySnapshot(hdfs, new Path(TEST_UTIL.getDefaultRootDirPath(), snapshotDir),
286 fs, new Path(copyDir, snapshotDir));
287 verifyArchive(fs, copyDir, tableName, Bytes.toString(snapshotName));
288 FSUtils.logFileSystemState(hdfs, snapshotDir, LOG);
289 }
290
291
292
293
294 @Test
295 public void testExportFailure() throws Exception {
296 assertEquals(1, runExportAndInjectFailures(snapshotName, false));
297 }
298
299
300
301
302 @Test
303 public void testExportRetry() throws Exception {
304 assertEquals(0, runExportAndInjectFailures(snapshotName, true));
305 }
306
307
308
309
310 private int runExportAndInjectFailures(final byte[] snapshotName, boolean retry)
311 throws Exception {
312 Path copyDir = getLocalDestinationDir();
313 URI hdfsUri = FileSystem.get(TEST_UTIL.getConfiguration()).getUri();
314 FileSystem fs = FileSystem.get(copyDir.toUri(), new Configuration());
315 copyDir = copyDir.makeQualified(fs);
316
317 Configuration conf = new Configuration(TEST_UTIL.getConfiguration());
318 conf.setBoolean(ExportSnapshot.CONF_TEST_FAILURE, true);
319 conf.setBoolean(ExportSnapshot.CONF_TEST_RETRY, retry);
320
321
322 int res = ExportSnapshot.innerMain(conf, new String[] {
323 "-snapshot", Bytes.toString(snapshotName),
324 "-copy-to", copyDir.toString()
325 });
326 return res;
327 }
328
329
330
331
332 private void verifySnapshot(final FileSystem fs1, final Path root1,
333 final FileSystem fs2, final Path root2) throws IOException {
334 Set<String> s = new HashSet<String>();
335 assertEquals(listFiles(fs1, root1, root1), listFiles(fs2, root2, root2));
336 }
337
338
339
340
341 private void verifyArchive(final FileSystem fs, final Path rootDir,
342 final TableName tableName, final String snapshotName) throws IOException {
343 final Path exportedSnapshot = new Path(rootDir,
344 new Path(HConstants.SNAPSHOT_DIR_NAME, snapshotName));
345 final Path exportedArchive = new Path(rootDir, HConstants.HFILE_ARCHIVE_DIRECTORY);
346 LOG.debug(listFiles(fs, exportedArchive, exportedArchive));
347 SnapshotReferenceUtil.visitReferencedFiles(fs, exportedSnapshot,
348 new SnapshotReferenceUtil.FileVisitor() {
349 public void storeFile (final String region, final String family, final String hfile)
350 throws IOException {
351 verifyNonEmptyFile(new Path(exportedArchive,
352 new Path(FSUtils.getTableDir(new Path("./"), tableName),
353 new Path(region, new Path(family, hfile)))));
354 }
355
356 public void recoveredEdits (final String region, final String logfile)
357 throws IOException {
358 verifyNonEmptyFile(new Path(exportedSnapshot,
359 new Path(tableName.getNameAsString(), new Path(region, logfile))));
360 }
361
362 public void logFile (final String server, final String logfile)
363 throws IOException {
364 verifyNonEmptyFile(new Path(exportedSnapshot, new Path(server, logfile)));
365 }
366
367 private void verifyNonEmptyFile(final Path path) throws IOException {
368 assertTrue(path + " should exists", fs.exists(path));
369 assertTrue(path + " should not be empty", fs.getFileStatus(path).getLen() > 0);
370 }
371 });
372 }
373
374 private Set<String> listFiles(final FileSystem fs, final Path root, final Path dir)
375 throws IOException {
376 Set<String> files = new HashSet<String>();
377 int rootPrefix = root.toString().length();
378 FileStatus[] list = FSUtils.listStatus(fs, dir);
379 if (list != null) {
380 for (FileStatus fstat: list) {
381 LOG.debug(fstat.getPath());
382 if (fstat.isDir()) {
383 files.addAll(listFiles(fs, root, fstat.getPath()));
384 } else {
385 files.add(fstat.getPath().toString().substring(rootPrefix));
386 }
387 }
388 }
389 return files;
390 }
391
392 private Path getHdfsDestinationDir() {
393 Path rootDir = TEST_UTIL.getHBaseCluster().getMaster().getMasterFileSystem().getRootDir();
394 Path path = new Path(new Path(rootDir, "export-test"), "export-" + System.currentTimeMillis());
395 LOG.info("HDFS export destination path: " + path);
396 return path;
397 }
398
399 private Path getLocalDestinationDir() {
400 Path path = TEST_UTIL.getDataTestDir("local-export-" + System.currentTimeMillis());
401 LOG.info("Local export destination path: " + path);
402 return path;
403 }
404
405 private void removeExportDir(final Path path) throws IOException {
406 FileSystem fs = FileSystem.get(path.toUri(), new Configuration());
407 FSUtils.logFileSystemState(fs, path, LOG);
408 fs.delete(path, true);
409 }
410 }