org.apache.hadoop.hbase.migration.NamespaceUpgrade Maven / Gradle / Ivy
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/**
* The Apache Software Foundation
*
* 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.hadoop.hbase.migration;
import java.io.IOException;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PathFilter;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.NamespaceDescriptor;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.MetaTableAccessor;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.exceptions.DeserializationException;
import org.apache.hadoop.hbase.regionserver.HRegion;
import org.apache.hadoop.hbase.regionserver.HRegionFileSystem;
import org.apache.hadoop.hbase.wal.WAL;
import org.apache.hadoop.hbase.wal.WALFactory;
import org.apache.hadoop.hbase.security.access.AccessControlLists;
import org.apache.hadoop.hbase.snapshot.SnapshotDescriptionUtils;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.FSTableDescriptors;
import org.apache.hadoop.hbase.util.FSUtils;
import org.apache.hadoop.util.Tool;
import com.google.common.collect.Lists;
import com.google.common.primitives.Ints;
/**
* Upgrades old 0.94 filesystem layout to namespace layout
* Does the following:
*
* - creates system namespace directory and move .META. table there
* renaming .META. table to hbase:meta,
* this in turn would require to re-encode the region directory name
*
* The pre-0.96 paths and dir names are hardcoded in here.
*/
public class NamespaceUpgrade implements Tool {
private static final Log LOG = LogFactory.getLog(NamespaceUpgrade.class);
private Configuration conf;
private FileSystem fs;
private Path rootDir;
private Path sysNsDir;
private Path defNsDir;
private Path baseDirs[];
private Path backupDir;
// First move everything to this tmp .data dir in case there is a table named 'data'
private static final String TMP_DATA_DIR = ".data";
// Old dir names to migrate.
private static final String DOT_LOGS = ".logs";
private static final String DOT_OLD_LOGS = ".oldlogs";
private static final String DOT_CORRUPT = ".corrupt";
private static final String DOT_SPLITLOG = "splitlog";
private static final String DOT_ARCHIVE = ".archive";
// The old default directory of hbase.dynamic.jars.dir(0.94.12 release).
private static final String DOT_LIB_DIR = ".lib";
private static final String OLD_ACL = "_acl_";
/** Directories that are not HBase table directories */
static final List NON_USER_TABLE_DIRS = Arrays.asList(new String[] {
DOT_LOGS,
DOT_OLD_LOGS,
DOT_CORRUPT,
DOT_SPLITLOG,
HConstants.HBCK_SIDELINEDIR_NAME,
DOT_ARCHIVE,
HConstants.SNAPSHOT_DIR_NAME,
HConstants.HBASE_TEMP_DIRECTORY,
TMP_DATA_DIR,
OLD_ACL,
DOT_LIB_DIR});
public NamespaceUpgrade() throws IOException {
super();
}
public void init() throws IOException {
this.rootDir = FSUtils.getRootDir(conf);
FSUtils.setFsDefault(getConf(), rootDir);
this.fs = FileSystem.get(conf);
Path tmpDataDir = new Path(rootDir, TMP_DATA_DIR);
sysNsDir = new Path(tmpDataDir, NamespaceDescriptor.SYSTEM_NAMESPACE_NAME_STR);
defNsDir = new Path(tmpDataDir, NamespaceDescriptor.DEFAULT_NAMESPACE_NAME_STR);
baseDirs = new Path[]{rootDir,
new Path(rootDir, HConstants.HFILE_ARCHIVE_DIRECTORY),
new Path(rootDir, HConstants.HBASE_TEMP_DIRECTORY)};
backupDir = new Path(rootDir, HConstants.MIGRATION_NAME);
}
public void upgradeTableDirs() throws IOException, DeserializationException {
// if new version is written then upgrade is done
if (verifyNSUpgrade(fs, rootDir)) {
return;
}
makeNamespaceDirs();
migrateTables();
migrateSnapshots();
migrateDotDirs();
migrateMeta();
migrateACL();
deleteRoot();
FSUtils.setVersion(fs, rootDir);
}
/**
* Remove the -ROOT- dir. No longer of use.
* @throws IOException
*/
public void deleteRoot() throws IOException {
Path rootDir = new Path(this.rootDir, "-ROOT-");
if (this.fs.exists(rootDir)) {
if (!this.fs.delete(rootDir, true)) LOG.info("Failed remove of " + rootDir);
LOG.info("Deleted " + rootDir);
}
}
/**
* Rename all the dot dirs -- .data, .archive, etc. -- as data, archive, etc.; i.e. minus the dot.
* @throws IOException
*/
public void migrateDotDirs() throws IOException {
// Dot dirs to rename. Leave the tmp dir named '.tmp' and snapshots as .hbase-snapshot.
final Path archiveDir = new Path(rootDir, HConstants.HFILE_ARCHIVE_DIRECTORY);
Path [][] dirs = new Path[][] {
new Path [] {new Path(rootDir, DOT_CORRUPT), new Path(rootDir, HConstants.CORRUPT_DIR_NAME)},
new Path [] {new Path(rootDir, DOT_LOGS), new Path(rootDir, HConstants.HREGION_LOGDIR_NAME)},
new Path [] {new Path(rootDir, DOT_OLD_LOGS),
new Path(rootDir, HConstants.HREGION_OLDLOGDIR_NAME)},
new Path [] {new Path(rootDir, TMP_DATA_DIR),
new Path(rootDir, HConstants.BASE_NAMESPACE_DIR)},
new Path[] { new Path(rootDir, DOT_LIB_DIR),
new Path(rootDir, HConstants.LIB_DIR)}};
for (Path [] dir: dirs) {
Path src = dir[0];
Path tgt = dir[1];
if (!this.fs.exists(src)) {
LOG.info("Does not exist: " + src);
continue;
}
rename(src, tgt);
}
// Do the .archive dir. Need to move its subdirs to the default ns dir under data dir... so
// from '.archive/foo', to 'archive/data/default/foo'.
Path oldArchiveDir = new Path(rootDir, DOT_ARCHIVE);
if (this.fs.exists(oldArchiveDir)) {
// This is a pain doing two nn calls but portable over h1 and h2.
mkdirs(archiveDir);
Path archiveDataDir = new Path(archiveDir, HConstants.BASE_NAMESPACE_DIR);
mkdirs(archiveDataDir);
rename(oldArchiveDir, new Path(archiveDataDir,
NamespaceDescriptor.DEFAULT_NAMESPACE_NAME_STR));
}
// Update the system and user namespace dirs removing the dot in front of .data.
Path dataDir = new Path(rootDir, HConstants.BASE_NAMESPACE_DIR);
sysNsDir = new Path(dataDir, NamespaceDescriptor.SYSTEM_NAMESPACE_NAME_STR);
defNsDir = new Path(dataDir, NamespaceDescriptor.DEFAULT_NAMESPACE_NAME_STR);
}
private void mkdirs(final Path p) throws IOException {
if (!this.fs.mkdirs(p)) throw new IOException("Failed make of " + p);
}
private void rename(final Path src, final Path tgt) throws IOException {
if (!fs.rename(src, tgt)) {
throw new IOException("Failed move " + src + " to " + tgt);
}
}
/**
* Create the system and default namespaces dirs
* @throws IOException
*/
public void makeNamespaceDirs() throws IOException {
if (!fs.exists(sysNsDir)) {
if (!fs.mkdirs(sysNsDir)) {
throw new IOException("Failed to create system namespace dir: " + sysNsDir);
}
}
if (!fs.exists(defNsDir)) {
if (!fs.mkdirs(defNsDir)) {
throw new IOException("Failed to create default namespace dir: " + defNsDir);
}
}
}
/**
* Migrate all tables into respective namespaces, either default or system. We put them into
* a temporary location, '.data', in case a user table is name 'data'. In a later method we will
* move stuff from .data to data.
* @throws IOException
*/
public void migrateTables() throws IOException {
List sysTables = Lists.newArrayList("-ROOT-",".META.", ".META");
// Migrate tables including archive and tmp
for (Path baseDir: baseDirs) {
if (!fs.exists(baseDir)) continue;
List oldTableDirs = FSUtils.getLocalTableDirs(fs, baseDir);
for (Path oldTableDir: oldTableDirs) {
if (NON_USER_TABLE_DIRS.contains(oldTableDir.getName())) continue;
if (sysTables.contains(oldTableDir.getName())) continue;
// Make the new directory under the ns to which we will move the table.
Path nsDir = new Path(this.defNsDir,
TableName.valueOf(oldTableDir.getName()).getQualifierAsString());
LOG.info("Moving " + oldTableDir + " to " + nsDir);
if (!fs.exists(nsDir.getParent())) {
if (!fs.mkdirs(nsDir.getParent())) {
throw new IOException("Failed to create namespace dir "+nsDir.getParent());
}
}
if (sysTables.indexOf(oldTableDir.getName()) < 0) {
LOG.info("Migrating table " + oldTableDir.getName() + " to " + nsDir);
if (!fs.rename(oldTableDir, nsDir)) {
throw new IOException("Failed to move "+oldTableDir+" to namespace dir "+nsDir);
}
}
}
}
}
public void migrateSnapshots() throws IOException {
//migrate snapshot dir
Path oldSnapshotDir = new Path(rootDir, HConstants.OLD_SNAPSHOT_DIR_NAME);
Path newSnapshotDir = new Path(rootDir, HConstants.SNAPSHOT_DIR_NAME);
if (fs.exists(oldSnapshotDir)) {
boolean foundOldSnapshotDir = false;
// Logic to verify old snapshot dir culled from SnapshotManager
// ignore all the snapshots in progress
FileStatus[] snapshots = fs.listStatus(oldSnapshotDir,
new SnapshotDescriptionUtils.CompletedSnaphotDirectoriesFilter(fs));
// loop through all the completed snapshots
for (FileStatus snapshot : snapshots) {
Path info = new Path(snapshot.getPath(), SnapshotDescriptionUtils.SNAPSHOTINFO_FILE);
// if the snapshot is bad
if (fs.exists(info)) {
foundOldSnapshotDir = true;
break;
}
}
if(foundOldSnapshotDir) {
LOG.info("Migrating snapshot dir");
if (!fs.rename(oldSnapshotDir, newSnapshotDir)) {
throw new IOException("Failed to move old snapshot dir "+
oldSnapshotDir+" to new "+newSnapshotDir);
}
}
}
}
public void migrateMeta() throws IOException {
Path newMetaDir = new Path(this.sysNsDir, TableName.META_TABLE_NAME.getQualifierAsString());
Path newMetaRegionDir =
new Path(newMetaDir, HRegionInfo.FIRST_META_REGIONINFO.getEncodedName());
Path oldMetaDir = new Path(rootDir, ".META.");
if (fs.exists(oldMetaDir)) {
LOG.info("Migrating meta table " + oldMetaDir.getName() + " to " + newMetaDir);
if (!fs.rename(oldMetaDir, newMetaDir)) {
throw new IOException("Failed to migrate meta table "
+ oldMetaDir.getName() + " to " + newMetaDir);
}
} else {
// on windows NTFS, meta's name is .META (note the missing dot at the end)
oldMetaDir = new Path(rootDir, ".META");
if (fs.exists(oldMetaDir)) {
LOG.info("Migrating meta table " + oldMetaDir.getName() + " to " + newMetaDir);
if (!fs.rename(oldMetaDir, newMetaDir)) {
throw new IOException("Failed to migrate meta table "
+ oldMetaDir.getName() + " to " + newMetaDir);
}
}
}
// Since meta table name has changed rename meta region dir from it's old encoding to new one
Path oldMetaRegionDir = HRegion.getRegionDir(rootDir,
new Path(newMetaDir, "1028785192").toString());
if (fs.exists(oldMetaRegionDir)) {
LOG.info("Migrating meta region " + oldMetaRegionDir + " to " + newMetaRegionDir);
if (!fs.rename(oldMetaRegionDir, newMetaRegionDir)) {
throw new IOException("Failed to migrate meta region "
+ oldMetaRegionDir + " to " + newMetaRegionDir);
}
}
// Remove .tableinfo files as they refer to ".META.".
// They will be recreated by master on startup.
removeTableInfoInPre96Format(TableName.META_TABLE_NAME);
Path oldRootDir = new Path(rootDir, "-ROOT-");
if(!fs.rename(oldRootDir, backupDir)) {
throw new IllegalStateException("Failed to old data: "+oldRootDir+" to "+backupDir);
}
}
/**
* Removes .tableinfo files that are laid in pre-96 format (i.e., the tableinfo files are under
* table directory).
* @param tableName
* @throws IOException
*/
private void removeTableInfoInPre96Format(TableName tableName) throws IOException {
Path tableDir = FSUtils.getTableDir(rootDir, tableName);
FileStatus[] status = FSUtils.listStatus(fs, tableDir, TABLEINFO_PATHFILTER);
if (status == null) return;
for (FileStatus fStatus : status) {
FSUtils.delete(fs, fStatus.getPath(), false);
}
}
public void migrateACL() throws IOException {
TableName oldTableName = TableName.valueOf(OLD_ACL);
Path oldTablePath = new Path(rootDir, oldTableName.getNameAsString());
if(!fs.exists(oldTablePath)) {
return;
}
LOG.info("Migrating ACL table");
TableName newTableName = AccessControlLists.ACL_TABLE_NAME;
Path newTablePath = FSUtils.getTableDir(rootDir, newTableName);
HTableDescriptor oldDesc =
readTableDescriptor(fs, getCurrentTableInfoStatus(fs, oldTablePath));
if(FSTableDescriptors.getTableInfoPath(fs, newTablePath) == null) {
LOG.info("Creating new tableDesc for ACL");
HTableDescriptor newDesc = new HTableDescriptor(oldDesc);
newDesc.setName(newTableName);
new FSTableDescriptors(this.conf).createTableDescriptorForTableDirectory(
newTablePath, newDesc, true);
}
ServerName fakeServer = ServerName.valueOf("nsupgrade", 96, 123);
final WALFactory walFactory = new WALFactory(conf, null, fakeServer.toString());
WAL metawal = walFactory.getMetaWAL(HRegionInfo.FIRST_META_REGIONINFO.getEncodedNameAsBytes());
FSTableDescriptors fst = new FSTableDescriptors(conf);
HRegion meta = HRegion.openHRegion(rootDir, HRegionInfo.FIRST_META_REGIONINFO,
fst.get(TableName.META_TABLE_NAME), metawal, conf);
HRegion region = null;
try {
for(Path regionDir : FSUtils.getRegionDirs(fs, oldTablePath)) {
LOG.info("Migrating ACL region "+regionDir.getName());
HRegionInfo oldRegionInfo = HRegionFileSystem.loadRegionInfoFileContent(fs, regionDir);
HRegionInfo newRegionInfo =
new HRegionInfo(newTableName,
oldRegionInfo.getStartKey(),
oldRegionInfo.getEndKey(),
oldRegionInfo.isSplit(),
oldRegionInfo.getRegionId());
newRegionInfo.setOffline(oldRegionInfo.isOffline());
region =
new HRegion(
HRegionFileSystem.openRegionFromFileSystem(conf, fs, oldTablePath,
oldRegionInfo, false),
metawal,
conf,
oldDesc,
null);
region.initialize();
updateAcls(region);
// closing the region would flush it so we don't need an explicit flush to save
// acl changes.
region.close();
//Create new region dir
Path newRegionDir = new Path(newTablePath, newRegionInfo.getEncodedName());
if(!fs.exists(newRegionDir)) {
if(!fs.mkdirs(newRegionDir)) {
throw new IllegalStateException("Failed to create new region dir: " + newRegionDir);
}
}
//create new region info file, delete in case one exists
HRegionFileSystem.openRegionFromFileSystem(conf, fs, newTablePath, newRegionInfo, false);
//migrate region contents
for(FileStatus file : fs.listStatus(regionDir, new FSUtils.UserTableDirFilter(fs))) {
if(file.getPath().getName().equals(HRegionFileSystem.REGION_INFO_FILE))
continue;
if(!fs.rename(file.getPath(), newRegionDir)) {
throw new IllegalStateException("Failed to move file "+file.getPath()+" to " +
newRegionDir);
}
}
meta.put(MetaTableAccessor.makePutFromRegionInfo(newRegionInfo));
meta.delete(MetaTableAccessor.makeDeleteFromRegionInfo(oldRegionInfo));
}
} finally {
meta.flush(true);
meta.waitForFlushesAndCompactions();
meta.close();
walFactory.close();
if(region != null) {
region.close();
}
}
if(!fs.rename(oldTablePath, backupDir)) {
throw new IllegalStateException("Failed to old data: "+oldTablePath+" to "+backupDir);
}
}
/**
* Deletes the old _acl_ entry, and inserts a new one using namespace.
* @param region
* @throws IOException
*/
void updateAcls(HRegion region) throws IOException {
byte[] rowKey = Bytes.toBytes(NamespaceUpgrade.OLD_ACL);
// get the old _acl_ entry, if present.
Get g = new Get(rowKey);
Result r = region.get(g);
if (r != null && r.size() > 0) {
// create a put for new _acl_ entry with rowkey as hbase:acl
Put p = new Put(AccessControlLists.ACL_GLOBAL_NAME);
for (Cell c : r.rawCells()) {
p.addImmutable(CellUtil.cloneFamily(c), CellUtil.cloneQualifier(c), CellUtil.cloneValue(c));
}
region.put(p);
// delete the old entry
Delete del = new Delete(rowKey);
region.delete(del);
}
// delete the old entry for '-ROOT-'
rowKey = Bytes.toBytes(TableName.OLD_ROOT_STR);
Delete del = new Delete(rowKey);
region.delete(del);
// rename .META. to hbase:meta
rowKey = Bytes.toBytes(TableName.OLD_META_STR);
g = new Get(rowKey);
r = region.get(g);
if (r != null && r.size() > 0) {
// create a put for new .META. entry with rowkey as hbase:meta
Put p = new Put(TableName.META_TABLE_NAME.getName());
for (Cell c : r.rawCells()) {
p.addImmutable(CellUtil.cloneFamily(c), CellUtil.cloneQualifier(c), CellUtil.cloneValue(c));
}
region.put(p);
// delete the old entry
del = new Delete(rowKey);
region.delete(del);
}
}
//Culled from FSTableDescriptors
private static HTableDescriptor readTableDescriptor(FileSystem fs,
FileStatus status) throws IOException {
int len = Ints.checkedCast(status.getLen());
byte [] content = new byte[len];
FSDataInputStream fsDataInputStream = fs.open(status.getPath());
try {
fsDataInputStream.readFully(content);
} finally {
fsDataInputStream.close();
}
HTableDescriptor htd = null;
try {
htd = HTableDescriptor.parseFrom(content);
} catch (DeserializationException e) {
throw new IOException("content=" + Bytes.toShort(content), e);
}
return htd;
}
private static final PathFilter TABLEINFO_PATHFILTER = new PathFilter() {
@Override
public boolean accept(Path p) {
// Accept any file that starts with TABLEINFO_NAME
return p.getName().startsWith(".tableinfo");
}
};
static final Comparator TABLEINFO_FILESTATUS_COMPARATOR =
new Comparator() {
@Override
public int compare(FileStatus left, FileStatus right) {
return right.compareTo(left);
}};
// logic culled from FSTableDescriptors
static FileStatus getCurrentTableInfoStatus(FileSystem fs, Path dir)
throws IOException {
FileStatus [] status = FSUtils.listStatus(fs, dir, TABLEINFO_PATHFILTER);
if (status == null || status.length < 1) return null;
FileStatus mostCurrent = null;
for (FileStatus file : status) {
if (mostCurrent == null || TABLEINFO_FILESTATUS_COMPARATOR.compare(file, mostCurrent) < 0) {
mostCurrent = file;
}
}
return mostCurrent;
}
public static boolean verifyNSUpgrade(FileSystem fs, Path rootDir)
throws IOException {
try {
return FSUtils.getVersion(fs, rootDir).equals(HConstants.FILE_SYSTEM_VERSION);
} catch (DeserializationException e) {
throw new IOException("Failed to verify namespace upgrade", e);
}
}
@Override
public int run(String[] args) throws Exception {
if (args.length < 1 || !args[0].equals("--upgrade")) {
System.out.println("Usage: --upgrade");
return 0;
}
init();
upgradeTableDirs();
return 0;
}
@Override
public void setConf(Configuration conf) {
this.conf = conf;
}
@Override
public Configuration getConf() {
return conf;
}
}