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Utility to rebuild interleaved storage index files
We came across a case where the a ledger had been deleted from zookeeper accidently. It was possible to recover the ledger metadata from the zookeeper journal and old snapshots, but the bookies had deleted the indices by this time. However, even if the index is deleted, the data still exists in the entrylog. This utility scans the entrylog to rebuild the index, thereby making the ledger available again. Author: Ivan Kelly <ivank@apache.org> Reviewers: Enrico Olivelli <eolivelli@gmail.com>, Sijie Guo <sijie@apache.org> This closes #1642 from ivankelly/regen-from-entrylogger
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230 changes: 230 additions & 0 deletions
230
...erver/src/main/java/org/apache/bookkeeper/bookie/InterleavedStorageRegenerateIndexOp.java
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| /** | ||
| * | ||
| * 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.bookkeeper.bookie; | ||
|
|
||
| import io.netty.buffer.ByteBuf; | ||
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|
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| import java.io.IOException; | ||
| import java.security.NoSuchAlgorithmException; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
| import java.util.Set; | ||
| import java.util.concurrent.TimeUnit; | ||
|
|
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| import org.apache.bookkeeper.bookie.EntryLogger.EntryLogScanner; | ||
| import org.apache.bookkeeper.common.util.Watcher; | ||
| import org.apache.bookkeeper.conf.ServerConfiguration; | ||
| import org.apache.bookkeeper.proto.checksum.DigestManager; | ||
| import org.apache.bookkeeper.stats.NullStatsLogger; | ||
| import org.apache.bookkeeper.util.DiskChecker; | ||
| import org.apache.bookkeeper.util.SnapshotMap; | ||
| import org.apache.commons.lang.time.DurationFormatUtils; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
||
| /** | ||
| * Scan all entries in the entry log and rebuild the index file for one ledger. | ||
| */ | ||
| public class InterleavedStorageRegenerateIndexOp { | ||
| private static final Logger LOG = LoggerFactory.getLogger(InterleavedStorageRegenerateIndexOp.class); | ||
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| private final ServerConfiguration conf; | ||
| private final Set<Long> ledgerIds; | ||
| private final byte[] masterKey; | ||
|
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| public InterleavedStorageRegenerateIndexOp(ServerConfiguration conf, Set<Long> ledgerIds, byte[] password) | ||
| throws NoSuchAlgorithmException { | ||
| this.conf = conf; | ||
| this.ledgerIds = ledgerIds; | ||
| this.masterKey = DigestManager.generateMasterKey(password); | ||
| } | ||
|
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| static class RecoveryStats { | ||
| long firstEntry = Long.MAX_VALUE; | ||
| long lastEntry = Long.MIN_VALUE; | ||
| long numEntries = 0; | ||
|
|
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| void registerEntry(long entryId) { | ||
| numEntries++; | ||
| if (entryId < firstEntry) { | ||
| firstEntry = entryId; | ||
| } | ||
| if (entryId > lastEntry) { | ||
| lastEntry = entryId; | ||
| } | ||
| } | ||
|
|
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| long getNumEntries() { | ||
| return numEntries; | ||
| } | ||
|
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| long getFirstEntry() { | ||
| return firstEntry; | ||
| } | ||
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| long getLastEntry() { | ||
| return lastEntry; | ||
| } | ||
| } | ||
|
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| public void initiate(boolean dryRun) throws IOException { | ||
| LOG.info("Starting index rebuilding"); | ||
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| DiskChecker diskChecker = Bookie.createDiskChecker(conf); | ||
| LedgerDirsManager ledgerDirsManager = Bookie.createLedgerDirsManager( | ||
| conf, diskChecker, NullStatsLogger.INSTANCE); | ||
| LedgerDirsManager indexDirsManager = Bookie.createIndexDirsManager( | ||
| conf, diskChecker, NullStatsLogger.INSTANCE, ledgerDirsManager); | ||
| EntryLogger entryLogger = new EntryLogger(conf, ledgerDirsManager); | ||
| final LedgerCache ledgerCache; | ||
| if (dryRun) { | ||
| ledgerCache = new DryRunLedgerCache(); | ||
| } else { | ||
| ledgerCache = new LedgerCacheImpl(conf, new SnapshotMap<Long, Boolean>(), | ||
| indexDirsManager, NullStatsLogger.INSTANCE); | ||
| } | ||
|
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| Set<Long> entryLogs = entryLogger.getEntryLogsSet(); | ||
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| int totalEntryLogs = entryLogs.size(); | ||
| int completedEntryLogs = 0; | ||
| long startTime = System.nanoTime(); | ||
|
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| LOG.info("Scanning {} entry logs", totalEntryLogs); | ||
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| Map<Long, RecoveryStats> stats = new HashMap<>(); | ||
| for (long entryLogId : entryLogs) { | ||
| LOG.info("Scanning {}", entryLogId); | ||
| entryLogger.scanEntryLog(entryLogId, new EntryLogScanner() { | ||
| @Override | ||
| public void process(long ledgerId, long offset, ByteBuf entry) throws IOException { | ||
| long entryId = entry.getLong(8); | ||
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| stats.computeIfAbsent(ledgerId, (ignore) -> new RecoveryStats()).registerEntry(entryId); | ||
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| // Actual location indexed is pointing past the entry size | ||
| long location = (entryLogId << 32L) | (offset + 4); | ||
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| if (LOG.isDebugEnabled()) { | ||
| LOG.debug("Rebuilding {}:{} at location {} / {}", ledgerId, entryId, location >> 32, | ||
| location & (Integer.MAX_VALUE - 1)); | ||
| } | ||
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| if (!ledgerCache.ledgerExists(ledgerId)) { | ||
| ledgerCache.setMasterKey(ledgerId, masterKey); | ||
| ledgerCache.setFenced(ledgerId); | ||
| } | ||
| ledgerCache.putEntryOffset(ledgerId, entryId, location); | ||
| } | ||
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| @Override | ||
| public boolean accept(long ledgerId) { | ||
| return ledgerIds.contains(ledgerId); | ||
| } | ||
| }); | ||
|
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| ledgerCache.flushLedger(true); | ||
|
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| ++completedEntryLogs; | ||
| LOG.info("Completed scanning of log {}.log -- {} / {}", Long.toHexString(entryLogId), completedEntryLogs, | ||
| totalEntryLogs); | ||
| } | ||
|
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| LOG.info("Rebuilding indices done"); | ||
| for (long ledgerId : ledgerIds) { | ||
| RecoveryStats ledgerStats = stats.get(ledgerId); | ||
| if (ledgerStats == null || ledgerStats.getNumEntries() == 0) { | ||
| LOG.info(" {} - No entries found", ledgerId); | ||
| } else { | ||
| LOG.info(" {} - Found {} entries, from {} to {}", ledgerId, | ||
| ledgerStats.getNumEntries(), ledgerStats.getFirstEntry(), ledgerStats.getLastEntry()); | ||
| } | ||
| } | ||
| LOG.info("Total time: {}", DurationFormatUtils.formatDurationHMS( | ||
| TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startTime))); | ||
| } | ||
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| static class DryRunLedgerCache implements LedgerCache { | ||
| @Override | ||
| public void close() { | ||
| } | ||
| @Override | ||
| public boolean setFenced(long ledgerId) throws IOException { | ||
| return false; | ||
| } | ||
| @Override | ||
| public boolean isFenced(long ledgerId) throws IOException { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
| @Override | ||
| public void setMasterKey(long ledgerId, byte[] masterKey) throws IOException { | ||
| } | ||
| @Override | ||
| public byte[] readMasterKey(long ledgerId) throws IOException, BookieException { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
| @Override | ||
| public boolean ledgerExists(long ledgerId) throws IOException { | ||
| return false; | ||
| } | ||
| @Override | ||
| public void putEntryOffset(long ledger, long entry, long offset) throws IOException { | ||
| } | ||
| @Override | ||
| public long getEntryOffset(long ledger, long entry) throws IOException { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
| @Override | ||
| public void flushLedger(boolean doAll) throws IOException { | ||
| } | ||
| @Override | ||
| public long getLastEntry(long ledgerId) throws IOException { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
|
|
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| @Override | ||
| public Long getLastAddConfirmed(long ledgerId) throws IOException { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
| @Override | ||
| public long updateLastAddConfirmed(long ledgerId, long lac) throws IOException { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
| @Override | ||
| public boolean waitForLastAddConfirmedUpdate(long ledgerId, | ||
| long previousLAC, | ||
| Watcher<LastAddConfirmedUpdateNotification> watcher) | ||
| throws IOException { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
| @Override | ||
| public void deleteLedger(long ledgerId) throws IOException { | ||
| } | ||
| @Override | ||
| public void setExplicitLac(long ledgerId, ByteBuf lac) throws IOException { | ||
| } | ||
| @Override | ||
| public ByteBuf getExplicitLac(long ledgerId) { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
| } | ||
| } |
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