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HDFS-15492. Make trash root inside each snapshottable directory (#2176)

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Siyao Meng 2020-08-11 08:52:16 -07:00 committed by GitHub
parent 6c2ce3d56b
commit 3fd3aeb621
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8 changed files with 466 additions and 15 deletions
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18
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FsServerDefaults.java
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@ -56,6 +56,7 @@ public Writable newInstance() {
private DataChecksum.Type checksumType;
private String keyProviderUri;
private byte storagepolicyId;
private boolean snapshotTrashRootEnabled;
public FsServerDefaults() {
}
@ -83,6 +84,18 @@ public FsServerDefaults(long blockSize, int bytesPerChecksum,
boolean encryptDataTransfer, long trashInterval,
DataChecksum.Type checksumType,
String keyProviderUri, byte storagepolicy) {
this(blockSize, bytesPerChecksum, writePacketSize, replication,
fileBufferSize, encryptDataTransfer, trashInterval,
checksumType, keyProviderUri, storagepolicy,
false);
}
public FsServerDefaults(long blockSize, int bytesPerChecksum,
int writePacketSize, short replication, int fileBufferSize,
boolean encryptDataTransfer, long trashInterval,
DataChecksum.Type checksumType,
String keyProviderUri, byte storagepolicy,
boolean snapshotTrashRootEnabled) {
this.blockSize = blockSize;
this.bytesPerChecksum = bytesPerChecksum;
this.writePacketSize = writePacketSize;
@ -93,6 +106,7 @@ public FsServerDefaults(long blockSize, int bytesPerChecksum,
this.checksumType = checksumType;
this.keyProviderUri = keyProviderUri;
this.storagepolicyId = storagepolicy;
this.snapshotTrashRootEnabled = snapshotTrashRootEnabled;
}
public long getBlockSize() {
@ -139,6 +153,10 @@ public byte getDefaultStoragePolicyId() {
return storagepolicyId;
}
public boolean getSnapshotTrashRootEnabled() {
return snapshotTrashRootEnabled;
}
// /////////////////////////////////////////
// Writable
// /////////////////////////////////////////

26
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSClient.java
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@ -3149,6 +3149,32 @@ boolean isHDFSEncryptionEnabled() throws IOException {
return getKeyProviderUri() != null;
}
boolean isSnapshotTrashRootEnabled() throws IOException {
return getServerDefaults().getSnapshotTrashRootEnabled();
}
/**
* Get the snapshot root of a given file or directory if it exists.
* e.g. if /snapdir1 is a snapshottable directory and path given is
* /snapdir1/path/to/file, this method would return /snapdir1
* @param path Path to a file or a directory.
* @return Not null if found in a snapshot root directory.
* @throws IOException
*/
String getSnapshotRoot(Path path) throws IOException {
SnapshottableDirectoryStatus[] dirStatusList = getSnapshottableDirListing();
if (dirStatusList == null) {
return null;
}
for (SnapshottableDirectoryStatus dirStatus : dirStatusList) {
String currDir = dirStatus.getFullPath().toString();
if (path.toUri().getPath().startsWith(currDir)) {
return currDir;
}
}
return null;
}
/**
* Returns the SaslDataTransferClient configured for this DFSClient.
*

12
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSUtilClient.java
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@ -1040,4 +1040,16 @@ public static String getEZTrashRoot(EncryptionZone ez,
return (ezpath.equals("/") ? ezpath : ezpath + Path.SEPARATOR)
+ FileSystem.TRASH_PREFIX + Path.SEPARATOR + ugi.getShortUserName();
}
/**
* Returns trash root in a snapshottable directory.
* @param ssRoot String of path to a snapshottable directory root.
* @param ugi user of trash owner.
* @return unqualified path of trash root.
*/
public static String getSnapshotTrashRoot(String ssRoot,
UserGroupInformation ugi) {
return (ssRoot.equals("/") ? ssRoot : ssRoot + Path.SEPARATOR)
+ FileSystem.TRASH_PREFIX + Path.SEPARATOR + ugi.getShortUserName();
}
}

102
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DistributedFileSystem.java
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@ -129,10 +129,12 @@
import java.util.Arrays;
import java.util.Collection;
import java.util.EnumSet;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Optional;
import java.util.Set;
import static org.apache.hadoop.fs.impl.PathCapabilitiesSupport.validatePathCapabilityArgs;
@ -3273,8 +3275,11 @@ public ECTopologyVerifierResult getECTopologyResultForPolicies(
/**
* Get the root directory of Trash for a path in HDFS.
* 1. File in encryption zone returns /ez1/.Trash/username
* 2. File not in encryption zone, or encountered exception when checking
* the encryption zone of the path, returns /users/username/.Trash
* 2. File in snapshottable directory returns /snapdir1/.Trash/username
* if dfs.namenode.snapshot.trashroot.enabled is set to true.
* 3. In other cases, or encountered exception when checking the encryption
* zone or when checking snapshot root of the path, returns
* /users/username/.Trash
* Caller appends either Current or checkpoint timestamp for trash destination
* @param path the trash root of the path to be determined.
* @return trash root
@ -3283,41 +3288,89 @@ public ECTopologyVerifierResult getECTopologyResultForPolicies(
public Path getTrashRoot(Path path) {
statistics.incrementReadOps(1);
storageStatistics.incrementOpCounter(OpType.GET_TRASH_ROOT);
if (path == null) {
return super.getTrashRoot(null);
}
// Snapshottable directory trash root, not null if path is inside a
// snapshottable directory and isSnapshotTrashRootEnabled is true from NN.
String ssTrashRoot = null;
try {
if ((path == null) || !dfs.isHDFSEncryptionEnabled()) {
if (dfs.isSnapshotTrashRootEnabled()) {
String ssRoot = dfs.getSnapshotRoot(path);
if (ssRoot != null) {
ssTrashRoot = DFSUtilClient.getSnapshotTrashRoot(ssRoot, dfs.ugi);
}
}
} catch (IOException ioe) {
DFSClient.LOG.warn("Exception while checking whether the path is in a "
+ "snapshottable directory", ioe);
}
try {
if (!dfs.isHDFSEncryptionEnabled()) {
if (ssTrashRoot == null) {
// the path is not in a snapshottable directory and EZ is not enabled
return super.getTrashRoot(path);
} else {
return this.makeQualified(new Path(ssTrashRoot));
}
}
} catch (IOException ioe) {
DFSClient.LOG.warn("Exception while checking whether encryption zone is "
+ "supported", ioe);
}
// HDFS encryption is enabled on the cluster at this point, does not
// necessary mean the given path is in an EZ hence the check.
String parentSrc = path.isRoot() ?
path.toUri().getPath() : path.getParent().toUri().getPath();
String ezTrashRoot = null;
try {
EncryptionZone ez = dfs.getEZForPath(parentSrc);
if ((ez != null)) {
return this.makeQualified(
new Path(DFSUtilClient.getEZTrashRoot(ez, dfs.ugi)));
ezTrashRoot = DFSUtilClient.getEZTrashRoot(ez, dfs.ugi);
}
} catch (IOException e) {
DFSClient.LOG.warn("Exception in checking the encryption zone for the " +
"path " + parentSrc + ". " + e.getMessage());
}
if (ssTrashRoot == null) {
if (ezTrashRoot == null) {
// The path is neither in a snapshottable directory nor in an EZ
return super.getTrashRoot(path);
} else {
return this.makeQualified(new Path(ezTrashRoot));
}
} else {
if (ezTrashRoot == null) {
return this.makeQualified(new Path(ssTrashRoot));
} else {
// The path is in EZ and in a snapshottable directory
return this.makeQualified(new Path(
ssTrashRoot.length() > ezTrashRoot.length() ?
ssTrashRoot : ezTrashRoot));
}
}
}
/**
* Get all the trash roots of HDFS for current user or for all the users.
* 1. File deleted from non-encryption zone /user/username/.Trash
* 2. File deleted from encryption zones
* 1. File deleted from encryption zones
* e.g., ez1 rooted at /ez1 has its trash root at /ez1/.Trash/$USER
* 2. File deleted from snapshottable directories
* if dfs.namenode.snapshot.trashroot.enabled is set to true.
* e.g., snapshottable directory /snapdir1 has its trash root
* at /snapdir1/.Trash/$USER
* 3. File deleted from other directories
* /user/username/.Trash
* @param allUsers return trashRoots of all users if true, used by emptier
* @return trash roots of HDFS
*/
@Override
public Collection<FileStatus> getTrashRoots(boolean allUsers) {
List<FileStatus> ret = new ArrayList<>();
Set<FileStatus> ret = new HashSet<>();
// Get normal trash roots
ret.addAll(super.getTrashRoots(allUsers));
@ -3348,6 +3401,39 @@ public Collection<FileStatus> getTrashRoots(boolean allUsers) {
} catch (IOException e){
DFSClient.LOG.warn("Cannot get all encrypted trash roots", e);
}
try {
// Get snapshottable directory trash roots
if (dfs.isSnapshotTrashRootEnabled()) {
SnapshottableDirectoryStatus[] lst = dfs.getSnapshottableDirListing();
if (lst != null) {
for (SnapshottableDirectoryStatus dirStatus : lst) {
String ssDir = dirStatus.getFullPath().toString();
Path ssTrashRoot = new Path(ssDir, FileSystem.TRASH_PREFIX);
if (!exists(ssTrashRoot)) {
continue;
}
if (allUsers) {
for (FileStatus candidate : listStatus(ssTrashRoot)) {
if (exists(candidate.getPath())) {
ret.add(candidate);
}
}
} else {
Path userTrash = new Path(DFSUtilClient.getSnapshotTrashRoot(
ssDir, dfs.ugi));
try {
ret.add(getFileStatus(userTrash));
} catch (FileNotFoundException ignored) {
}
}
}
}
}
} catch (IOException e) {
DFSClient.LOG.warn("Cannot get snapshot trash roots", e);
}
return ret;
}

6
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocolPB/PBHelperClient.java
View File

@ -2124,7 +2124,8 @@ public static FsServerDefaults convert(FsServerDefaultsProto fs) {
fs.getTrashInterval(),
convert(fs.getChecksumType()),
fs.hasKeyProviderUri() ? fs.getKeyProviderUri() : null,
(byte) fs.getPolicyId());
(byte) fs.getPolicyId(),
fs.getSnapshotTrashRootEnabled());
}
public static List<CryptoProtocolVersionProto> convert(
@ -2298,7 +2299,8 @@ public static FsServerDefaultsProto convert(FsServerDefaults fs) {
.setEncryptDataTransfer(fs.getEncryptDataTransfer())
.setTrashInterval(fs.getTrashInterval())
.setChecksumType(convert(fs.getChecksumType()))
.setPolicyId(fs.getDefaultStoragePolicyId());
.setPolicyId(fs.getDefaultStoragePolicyId())
.setSnapshotTrashRootEnabled(fs.getSnapshotTrashRootEnabled());
if (fs.getKeyProviderUri() != null) {
builder.setKeyProviderUri(fs.getKeyProviderUri());
}

1
hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/hdfs.proto
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@ -526,6 +526,7 @@ message FsServerDefaultsProto {
optional ChecksumTypeProto checksumType = 8 [default = CHECKSUM_CRC32];
optional string keyProviderUri = 9;
optional uint32 policyId = 10 [default = 0];
optional bool snapshotTrashRootEnabled = 11 [default = false];
}

10
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
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@ -382,6 +382,12 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
public static final org.slf4j.Logger LOG = LoggerFactory
.getLogger(FSNamesystem.class.getName());
// The following are private configurations
static final String DFS_NAMENODE_SNAPSHOT_TRASHROOT_ENABLED =
"dfs.namenode.snapshot.trashroot.enabled";
static final boolean DFS_NAMENODE_SNAPSHOT_TRASHROOT_ENABLED_DEFAULT = false;
private final MetricsRegistry registry = new MetricsRegistry("FSNamesystem");
@Metric final MutableRatesWithAggregation detailedLockHoldTimeMetrics =
registry.newRatesWithAggregation("detailedLockHoldTimeMetrics");
@ -902,7 +908,9 @@ static FSNamesystem loadFromDisk(Configuration conf) throws IOException {
conf.getTrimmed(
CommonConfigurationKeysPublic.HADOOP_SECURITY_KEY_PROVIDER_PATH,
""),
blockManager.getStoragePolicySuite().getDefaultPolicy().getId());
blockManager.getStoragePolicySuite().getDefaultPolicy().getId(),
conf.getBoolean(DFS_NAMENODE_SNAPSHOT_TRASHROOT_ENABLED,
DFS_NAMENODE_SNAPSHOT_TRASHROOT_ENABLED_DEFAULT));
this.maxFsObjects = conf.getLong(DFS_NAMENODE_MAX_OBJECTS_KEY,
DFS_NAMENODE_MAX_OBJECTS_DEFAULT);

298
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDistributedFileSystem.java
View File

@ -42,6 +42,7 @@
import java.security.PrivilegedExceptionAction;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.EnumSet;
import java.util.HashSet;
@ -2144,4 +2145,301 @@ public void testECCloseCommittedBlock() throws Exception {
LambdaTestUtils.intercept(IOException.class, "", () -> str.close());
}
}
@Test
public void testGetTrashRoot() throws IOException {
Configuration conf = getTestConfiguration();
conf.setBoolean("dfs.namenode.snapshot.trashroot.enabled", true);
MiniDFSCluster cluster =
new MiniDFSCluster.Builder(conf).numDataNodes(1).build();
try {
DistributedFileSystem dfs = cluster.getFileSystem();
Path testDir = new Path("/ssgtr/test1/");
Path file0path = new Path(testDir, "file-0");
dfs.create(file0path);
Path trBeforeAllowSnapshot = dfs.getTrashRoot(file0path);
String trBeforeAllowSnapshotStr = trBeforeAllowSnapshot.toUri().getPath();
// The trash root should be in user home directory
String homeDirStr = dfs.getHomeDirectory().toUri().getPath();
assertTrue(trBeforeAllowSnapshotStr.startsWith(homeDirStr));
dfs.allowSnapshot(testDir);
Path trAfterAllowSnapshot = dfs.getTrashRoot(file0path);
String trAfterAllowSnapshotStr = trAfterAllowSnapshot.toUri().getPath();
// The trash root should now be in the snapshot root
String testDirStr = testDir.toUri().getPath();
assertTrue(trAfterAllowSnapshotStr.startsWith(testDirStr));
// Cleanup
dfs.disallowSnapshot(testDir);
dfs.delete(testDir, true);
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
private boolean isPathInUserHome(String pathStr, DistributedFileSystem dfs) {
String homeDirStr = dfs.getHomeDirectory().toUri().getPath();
return pathStr.startsWith(homeDirStr);
}
@Test
public void testGetTrashRoots() throws IOException {
Configuration conf = getTestConfiguration();
conf.setBoolean("dfs.namenode.snapshot.trashroot.enabled", true);
MiniDFSCluster cluster =
new MiniDFSCluster.Builder(conf).numDataNodes(1).build();
try {
DistributedFileSystem dfs = cluster.getFileSystem();
Path testDir = new Path("/ssgtr/test1/");
Path file0path = new Path(testDir, "file-0");
dfs.create(file0path);
// Create user trash
Path currUserHome = dfs.getHomeDirectory();
Path currUserTrash = new Path(currUserHome, FileSystem.TRASH_PREFIX);
dfs.mkdirs(currUserTrash);
// Create trash inside test directory
Path testDirTrash = new Path(testDir, FileSystem.TRASH_PREFIX);
Path testDirTrashCurrUser = new Path(testDirTrash,
UserGroupInformation.getCurrentUser().getShortUserName());
dfs.mkdirs(testDirTrashCurrUser);
Collection<FileStatus> trashRoots = dfs.getTrashRoots(false);
// getTrashRoots should only return 1 empty user trash in the home dir now
assertEquals(1, trashRoots.size());
FileStatus firstFileStatus = trashRoots.iterator().next();
String pathStr = firstFileStatus.getPath().toUri().getPath();
assertTrue(isPathInUserHome(pathStr, dfs));
// allUsers should not make a difference for now because we have one user
Collection<FileStatus> trashRootsAllUsers = dfs.getTrashRoots(true);
assertEquals(trashRoots, trashRootsAllUsers);
dfs.allowSnapshot(testDir);
Collection<FileStatus> trashRootsAfter = dfs.getTrashRoots(false);
// getTrashRoots should return 1 more trash root inside snapshottable dir
assertEquals(trashRoots.size() + 1, trashRootsAfter.size());
boolean foundUserHomeTrash = false;
boolean foundSnapDirUserTrash = false;
String testDirStr = testDir.toUri().getPath();
for (FileStatus fileStatus : trashRootsAfter) {
String currPathStr = fileStatus.getPath().toUri().getPath();
if (isPathInUserHome(currPathStr, dfs)) {
foundUserHomeTrash = true;
} else if (currPathStr.startsWith(testDirStr)) {
foundSnapDirUserTrash = true;
}
}
assertTrue(foundUserHomeTrash);
assertTrue(foundSnapDirUserTrash);
// allUsers should not make a difference for now because we have one user
Collection<FileStatus> trashRootsAfterAllUsers = dfs.getTrashRoots(true);
assertEquals(trashRootsAfter, trashRootsAfterAllUsers);
// Create trash root for user0
UserGroupInformation ugi = UserGroupInformation.createRemoteUser("user0");
String user0HomeStr = DFSUtilClient.getHomeDirectory(conf, ugi);
Path user0Trash = new Path(user0HomeStr, FileSystem.TRASH_PREFIX);
dfs.mkdirs(user0Trash);
// allUsers flag set to false should be unaffected
Collection<FileStatus> trashRootsAfter2 = dfs.getTrashRoots(false);
assertEquals(trashRootsAfter, trashRootsAfter2);
// allUsers flag set to true should include new user's trash
trashRootsAfter2 = dfs.getTrashRoots(true);
assertEquals(trashRootsAfter.size() + 1, trashRootsAfter2.size());
// Create trash root inside the snapshottable directory for user0
Path testDirTrashUser0 = new Path(testDirTrash, ugi.getShortUserName());
dfs.mkdirs(testDirTrashUser0);
Collection<FileStatus> trashRootsAfter3 = dfs.getTrashRoots(true);
assertEquals(trashRootsAfter2.size() + 1, trashRootsAfter3.size());
// Cleanup
dfs.disallowSnapshot(testDir);
dfs.delete(testDir, true);
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
@Test
public void testGetTrashRootsOnSnapshottableDirWithEZ()
throws IOException, NoSuchAlgorithmException {
Configuration conf = getTestConfiguration();
conf.setBoolean("dfs.namenode.snapshot.trashroot.enabled", true);
// Set encryption zone config
File tmpDir = GenericTestUtils.getTestDir(UUID.randomUUID().toString());
final Path jksPath = new Path(tmpDir.toString(), "test.jks");
conf.set(CommonConfigurationKeysPublic.HADOOP_SECURITY_KEY_PROVIDER_PATH,
JavaKeyStoreProvider.SCHEME_NAME + "://file" + jksPath.toUri());
MiniDFSCluster cluster =
new MiniDFSCluster.Builder(conf).numDataNodes(1).build();
// Create key for EZ
final KeyProvider provider =
cluster.getNameNode().getNamesystem().getProvider();
final KeyProvider.Options options = KeyProvider.options(conf);
provider.createKey("key", options);
provider.flush();
try {
DistributedFileSystem dfs = cluster.getFileSystem();
Path testDir = new Path("/ssgtr/test2/");
dfs.mkdirs(testDir);
dfs.createEncryptionZone(testDir, "key");
// Create trash inside test directory
Path testDirTrash = new Path(testDir, FileSystem.TRASH_PREFIX);
Path testDirTrashCurrUser = new Path(testDirTrash,
UserGroupInformation.getCurrentUser().getShortUserName());
dfs.mkdirs(testDirTrashCurrUser);
Collection<FileStatus> trashRoots = dfs.getTrashRoots(false);
assertEquals(1, trashRoots.size());
FileStatus firstFileStatus = trashRoots.iterator().next();
String pathStr = firstFileStatus.getPath().toUri().getPath();
String testDirStr = testDir.toUri().getPath();
assertTrue(pathStr.startsWith(testDirStr));
dfs.allowSnapshot(testDir);
Collection<FileStatus> trashRootsAfter = dfs.getTrashRoots(false);
// getTrashRoots should give the same result
assertEquals(trashRoots, trashRootsAfter);
// Cleanup
dfs.disallowSnapshot(testDir);
dfs.delete(testDir, true);
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
@Test
public void testGetTrashRootOnSnapshottableDirInEZ()
throws IOException, NoSuchAlgorithmException {
Configuration conf = getTestConfiguration();
conf.setBoolean("dfs.namenode.snapshot.trashroot.enabled", true);
// Set EZ config
File tmpDir = GenericTestUtils.getTestDir(UUID.randomUUID().toString());
final Path jksPath = new Path(tmpDir.toString(), "test.jks");
conf.set(CommonConfigurationKeysPublic.HADOOP_SECURITY_KEY_PROVIDER_PATH,
JavaKeyStoreProvider.SCHEME_NAME + "://file" + jksPath.toUri());
MiniDFSCluster cluster =
new MiniDFSCluster.Builder(conf).numDataNodes(1).build();
// Create key for EZ
final KeyProvider provider =
cluster.getNameNode().getNamesystem().getProvider();
final KeyProvider.Options options = KeyProvider.options(conf);
provider.createKey("key", options);
provider.flush();
try {
DistributedFileSystem dfs = cluster.getFileSystem();
Path testDir = new Path("/ssgtr/test3ez/");
dfs.mkdirs(testDir);
dfs.createEncryptionZone(testDir, "key");
Path testSubD = new Path(testDir, "sssubdir");
Path file1Path = new Path(testSubD, "file1");
dfs.create(file1Path);
final Path trBefore = dfs.getTrashRoot(file1Path);
final String trBeforeStr = trBefore.toUri().getPath();
// The trash root should be directly under testDir
final Path testDirTrash = new Path(testDir, FileSystem.TRASH_PREFIX);
final String testDirTrashStr = testDirTrash.toUri().getPath();
assertTrue(trBeforeStr.startsWith(testDirTrashStr));
dfs.allowSnapshot(testSubD);
final Path trAfter = dfs.getTrashRoot(file1Path);
final String trAfterStr = trAfter.toUri().getPath();
// The trash is now located in the dir inside
final Path testSubDirTrash = new Path(testSubD, FileSystem.TRASH_PREFIX);
UserGroupInformation ugi = UserGroupInformation.getCurrentUser();
final Path testSubDirUserTrash = new Path(testSubDirTrash,
ugi.getShortUserName());
final String testSubDirUserTrashStr =
testSubDirUserTrash.toUri().getPath();
assertEquals(testSubDirUserTrashStr, trAfterStr);
// Cleanup
dfs.disallowSnapshot(testSubD);
dfs.delete(testDir, true);
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
@Test
public void testGetTrashRootOnEZInSnapshottableDir()
throws IOException, NoSuchAlgorithmException {
Configuration conf = getTestConfiguration();
conf.setBoolean("dfs.namenode.snapshot.trashroot.enabled", true);
// Set EZ config
File tmpDir = GenericTestUtils.getTestDir(UUID.randomUUID().toString());
final Path jksPath = new Path(tmpDir.toString(), "test.jks");
conf.set(CommonConfigurationKeysPublic.HADOOP_SECURITY_KEY_PROVIDER_PATH,
JavaKeyStoreProvider.SCHEME_NAME + "://file" + jksPath.toUri());
MiniDFSCluster cluster =
new MiniDFSCluster.Builder(conf).numDataNodes(1).build();
// Create key for EZ
final KeyProvider provider =
cluster.getNameNode().getNamesystem().getProvider();
final KeyProvider.Options options = KeyProvider.options(conf);
provider.createKey("key", options);
provider.flush();
try {
DistributedFileSystem dfs = cluster.getFileSystem();
Path testDir = new Path("/ssgtr/test3ss/");
dfs.mkdirs(testDir);
dfs.allowSnapshot(testDir);
Path testSubD = new Path(testDir, "ezsubdir");
dfs.mkdirs(testSubD);
Path file1Path = new Path(testSubD, "file1");
dfs.create(file1Path);
final Path trBefore = dfs.getTrashRoot(file1Path);
final String trBeforeStr = trBefore.toUri().getPath();
// The trash root should be directly under testDir
final Path testDirTrash = new Path(testDir, FileSystem.TRASH_PREFIX);
final String testDirTrashStr = testDirTrash.toUri().getPath();
assertTrue(trBeforeStr.startsWith(testDirTrashStr));
// Need to remove the file inside the dir to establish EZ
dfs.delete(file1Path, false);
dfs.createEncryptionZone(testSubD, "key");
dfs.create(file1Path);
final Path trAfter = dfs.getTrashRoot(file1Path);
final String trAfterStr = trAfter.toUri().getPath();
// The trash is now located in the dir inside
final Path testSubDirTrash = new Path(testSubD, FileSystem.TRASH_PREFIX);
UserGroupInformation ugi = UserGroupInformation.getCurrentUser();
final Path testSubDirUserTrash = new Path(testSubDirTrash,
ugi.getShortUserName());
final String testSubDirUserTrashStr =
testSubDirUserTrash.toUri().getPath();
assertEquals(testSubDirUserTrashStr, trAfterStr);
// Cleanup
dfs.disallowSnapshot(testDir);
dfs.delete(testDir, true);
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
}