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HDFS-6432. Add snapshot related APIs to webhdfs. Contributed by Jing Zhao. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1596334 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Jing Zhao 2014-05-20 17:33:31 +00:00
parent 668f70db66
commit 44e9d346e9
8 changed files with 281 additions and 6 deletions
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2
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -372,6 +372,8 @@ Release 2.5.0 - UNRELEASED
HDFS-6345. DFS.listCacheDirectives() should allow filtering based on
cache directive ID. (wang)
HDFS-6432. Add snapshot related APIs to webhdfs. (jing9)
OPTIMIZATIONS
HDFS-6214. Webhdfs has poor throughput for files >2GB (daryn)

41
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/web/resources/NamenodeWebHdfsMethods.java
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@ -88,6 +88,7 @@ import org.apache.hadoop.hdfs.web.resources.LengthParam;
import org.apache.hadoop.hdfs.web.resources.ModificationTimeParam;
import org.apache.hadoop.hdfs.web.resources.NamenodeAddressParam;
import org.apache.hadoop.hdfs.web.resources.OffsetParam;
import org.apache.hadoop.hdfs.web.resources.OldSnapshotNameParam;
import org.apache.hadoop.hdfs.web.resources.OverwriteParam;
import org.apache.hadoop.hdfs.web.resources.OwnerParam;
import org.apache.hadoop.hdfs.web.resources.Param;
@ -98,6 +99,7 @@ import org.apache.hadoop.hdfs.web.resources.RecursiveParam;
import org.apache.hadoop.hdfs.web.resources.RenameOptionSetParam;
import org.apache.hadoop.hdfs.web.resources.RenewerParam;
import org.apache.hadoop.hdfs.web.resources.ReplicationParam;
import org.apache.hadoop.hdfs.web.resources.SnapshotNameParam;
import org.apache.hadoop.hdfs.web.resources.TokenArgumentParam;
import org.apache.hadoop.hdfs.web.resources.UriFsPathParam;
import org.apache.hadoop.hdfs.web.resources.UserParam;
@ -341,12 +343,16 @@ public class NamenodeWebHdfsMethods {
@QueryParam(TokenArgumentParam.NAME) @DefaultValue(TokenArgumentParam.DEFAULT)
final TokenArgumentParam delegationTokenArgument,
@QueryParam(AclPermissionParam.NAME) @DefaultValue(AclPermissionParam.DEFAULT)
final AclPermissionParam aclPermission
final AclPermissionParam aclPermission,
@QueryParam(SnapshotNameParam.NAME) @DefaultValue(SnapshotNameParam.DEFAULT)
final SnapshotNameParam snapshotName,
@QueryParam(OldSnapshotNameParam.NAME) @DefaultValue(OldSnapshotNameParam.DEFAULT)
final OldSnapshotNameParam oldSnapshotName
)throws IOException, InterruptedException {
return put(ugi, delegation, username, doAsUser, ROOT, op, destination,
owner, group, permission, overwrite, bufferSize, replication,
blockSize, modificationTime, accessTime, renameOptions, createParent,
delegationTokenArgument,aclPermission);
delegationTokenArgument, aclPermission, snapshotName, oldSnapshotName);
}
/** Handle HTTP PUT request. */
@ -392,12 +398,17 @@ public class NamenodeWebHdfsMethods {
@QueryParam(TokenArgumentParam.NAME) @DefaultValue(TokenArgumentParam.DEFAULT)
final TokenArgumentParam delegationTokenArgument,
@QueryParam(AclPermissionParam.NAME) @DefaultValue(AclPermissionParam.DEFAULT)
final AclPermissionParam aclPermission
final AclPermissionParam aclPermission,
@QueryParam(SnapshotNameParam.NAME) @DefaultValue(SnapshotNameParam.DEFAULT)
final SnapshotNameParam snapshotName,
@QueryParam(OldSnapshotNameParam.NAME) @DefaultValue(OldSnapshotNameParam.DEFAULT)
final OldSnapshotNameParam oldSnapshotName
) throws IOException, InterruptedException {
init(ugi, delegation, username, doAsUser, path, op, destination, owner,
group, permission, overwrite, bufferSize, replication, blockSize,
modificationTime, accessTime, renameOptions, delegationTokenArgument,aclPermission);
modificationTime, accessTime, renameOptions, delegationTokenArgument,
aclPermission, snapshotName, oldSnapshotName);
return ugi.doAs(new PrivilegedExceptionAction<Response>() {
@Override
@ -407,7 +418,8 @@ public class NamenodeWebHdfsMethods {
path.getAbsolutePath(), op, destination, owner, group,
permission, overwrite, bufferSize, replication, blockSize,
modificationTime, accessTime, renameOptions, createParent,
delegationTokenArgument,aclPermission);
delegationTokenArgument, aclPermission, snapshotName,
oldSnapshotName);
} finally {
reset();
}
@ -435,7 +447,9 @@ public class NamenodeWebHdfsMethods {
final RenameOptionSetParam renameOptions,
final CreateParentParam createParent,
final TokenArgumentParam delegationTokenArgument,
final AclPermissionParam aclPermission
final AclPermissionParam aclPermission,
final SnapshotNameParam snapshotName,
final OldSnapshotNameParam oldSnapshotName
) throws IOException, URISyntaxException {
final Configuration conf = (Configuration)context.getAttribute(JspHelper.CURRENT_CONF);
@ -535,6 +549,21 @@ public class NamenodeWebHdfsMethods {
np.setAcl(fullpath, aclPermission.getAclPermission(true));
return Response.ok().type(MediaType.APPLICATION_OCTET_STREAM).build();
}
case CREATESNAPSHOT: {
String snapshotPath = np.createSnapshot(fullpath, snapshotName.getValue());
final String js = JsonUtil.toJsonString(
org.apache.hadoop.fs.Path.class.getSimpleName(), snapshotPath);
return Response.ok(js).type(MediaType.APPLICATION_JSON).build();
}
case DELETESNAPSHOT: {
np.deleteSnapshot(fullpath, snapshotName.getValue());
return Response.ok().type(MediaType.APPLICATION_OCTET_STREAM).build();
}
case RENAMESNAPSHOT: {
np.renameSnapshot(fullpath, oldSnapshotName.getValue(),
snapshotName.getValue());
return Response.ok().type(MediaType.APPLICATION_OCTET_STREAM).build();
}
default:
throw new UnsupportedOperationException(op + " is not supported");
}

32
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/WebHdfsFileSystem.java
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@ -874,6 +874,38 @@ public class WebHdfsFileSystem extends FileSystem
new FsPathRunner(op, p, new AclPermissionParam(aclSpec)).run();
}
@Override
public Path createSnapshot(final Path path, final String snapshotName)
throws IOException {
statistics.incrementWriteOps(1);
final HttpOpParam.Op op = PutOpParam.Op.CREATESNAPSHOT;
Path spath = new FsPathResponseRunner<Path>(op, path,
new SnapshotNameParam(snapshotName)) {
@Override
Path decodeResponse(Map<?,?> json) {
return new Path((String) json.get(Path.class.getSimpleName()));
}
}.run();
return spath;
}
@Override
public void deleteSnapshot(final Path path, final String snapshotName)
throws IOException {
statistics.incrementWriteOps(1);
final HttpOpParam.Op op = PutOpParam.Op.DELETESNAPSHOT;
new FsPathRunner(op, path, new SnapshotNameParam(snapshotName)).run();
}
@Override
public void renameSnapshot(final Path path, final String snapshotOldName,
final String snapshotNewName) throws IOException {
statistics.incrementWriteOps(1);
final HttpOpParam.Op op = PutOpParam.Op.RENAMESNAPSHOT;
new FsPathRunner(op, path, new OldSnapshotNameParam(snapshotOldName),
new SnapshotNameParam(snapshotNewName)).run();
}
@Override
public boolean setReplication(final Path p, final short replication
) throws IOException {

40
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/resources/OldSnapshotNameParam.java Normal file
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@ -0,0 +1,40 @@
/**
* 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.hdfs.web.resources;
/**
* The old snapshot name parameter for renameSnapshot operation.
*/
public class OldSnapshotNameParam extends StringParam {
/** Parameter name. */
public static final String NAME = "oldsnapshotname";
/** Default parameter value. */
public static final String DEFAULT = "";
private static final Domain DOMAIN = new Domain(NAME, null);
public OldSnapshotNameParam(final String str) {
super(DOMAIN, str != null && !str.equals(DEFAULT) ? str : null);
}
@Override
public String getName() {
return NAME;
}
}

4
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/resources/PutOpParam.java
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@ -42,6 +42,10 @@ public class PutOpParam extends HttpOpParam<PutOpParam.Op> {
REMOVEDEFAULTACL(false, HttpURLConnection.HTTP_OK),
REMOVEACL(false, HttpURLConnection.HTTP_OK),
SETACL(false, HttpURLConnection.HTTP_OK),
CREATESNAPSHOT(false, HttpURLConnection.HTTP_OK),
DELETESNAPSHOT(false, HttpURLConnection.HTTP_OK),
RENAMESNAPSHOT(false, HttpURLConnection.HTTP_OK),
NULL(false, HttpURLConnection.HTTP_NOT_IMPLEMENTED);

41
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/resources/SnapshotNameParam.java Normal file
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@ -0,0 +1,41 @@
/**
* 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.hdfs.web.resources;
/**
* The snapshot name parameter for createSnapshot and deleteSnapshot operation.
* Also used to indicate the new snapshot name for renameSnapshot operation.
*/
public class SnapshotNameParam extends StringParam {
/** Parameter name. */
public static final String NAME = "snapshotname";
/** Default parameter value. */
public static final String DEFAULT = "";
private static final Domain DOMAIN = new Domain(NAME, null);
public SnapshotNameParam(final String str) {
super(DOMAIN, str != null && !str.equals(DEFAULT) ? str : null);
}
@Override
public String getName() {
return NAME;
}
}

119
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/TestWebHDFS.java
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@ -18,6 +18,8 @@
package org.apache.hadoop.hdfs.web;
import static org.junit.Assert.fail;
import java.io.IOException;
import java.net.URISyntaxException;
import java.security.PrivilegedExceptionAction;
@ -34,8 +36,10 @@ import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsAction;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.server.namenode.snapshot.SnapshotTestHelper;
import org.apache.hadoop.hdfs.server.namenode.web.resources.NamenodeWebHdfsMethods;
import org.apache.hadoop.hdfs.TestDFSClientRetries;
import org.apache.hadoop.security.UserGroupInformation;
@ -326,4 +330,119 @@ public class TestWebHDFS {
Assert.assertTrue(conf.getBoolean(DFSConfigKeys.DFS_WEBHDFS_ENABLED_KEY,
false));
}
/**
* Test snapshot creation through WebHdfs
*/
@Test
public void testWebHdfsCreateSnapshot() throws Exception {
MiniDFSCluster cluster = null;
final Configuration conf = WebHdfsTestUtil.createConf();
try {
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0).build();
cluster.waitActive();
final DistributedFileSystem dfs = cluster.getFileSystem();
final FileSystem webHdfs = WebHdfsTestUtil.getWebHdfsFileSystem(conf,
WebHdfsFileSystem.SCHEME);
final Path foo = new Path("/foo");
dfs.mkdirs(foo);
try {
webHdfs.createSnapshot(foo);
fail("Cannot create snapshot on a non-snapshottable directory");
} catch (Exception e) {
GenericTestUtils.assertExceptionContains(
"Directory is not a snapshottable directory", e);
}
// allow snapshots on /foo
dfs.allowSnapshot(foo);
// create snapshots on foo using WebHdfs
webHdfs.createSnapshot(foo, "s1");
// create snapshot without specifying name
final Path spath = webHdfs.createSnapshot(foo, null);
Assert.assertTrue(webHdfs.exists(spath));
final Path s1path = SnapshotTestHelper.getSnapshotRoot(foo, "s1");
Assert.assertTrue(webHdfs.exists(s1path));
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
/**
* Test snapshot deletion through WebHdfs
*/
@Test
public void testWebHdfsDeleteSnapshot() throws Exception {
MiniDFSCluster cluster = null;
final Configuration conf = WebHdfsTestUtil.createConf();
try {
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0).build();
cluster.waitActive();
final DistributedFileSystem dfs = cluster.getFileSystem();
final FileSystem webHdfs = WebHdfsTestUtil.getWebHdfsFileSystem(conf,
WebHdfsFileSystem.SCHEME);
final Path foo = new Path("/foo");
dfs.mkdirs(foo);
dfs.allowSnapshot(foo);
webHdfs.createSnapshot(foo, "s1");
final Path spath = webHdfs.createSnapshot(foo, null);
Assert.assertTrue(webHdfs.exists(spath));
final Path s1path = SnapshotTestHelper.getSnapshotRoot(foo, "s1");
Assert.assertTrue(webHdfs.exists(s1path));
// delete the two snapshots
webHdfs.deleteSnapshot(foo, "s1");
Assert.assertFalse(webHdfs.exists(s1path));
webHdfs.deleteSnapshot(foo, spath.getName());
Assert.assertFalse(webHdfs.exists(spath));
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
/**
* Test snapshot rename through WebHdfs
*/
@Test
public void testWebHdfsRenameSnapshot() throws Exception {
MiniDFSCluster cluster = null;
final Configuration conf = WebHdfsTestUtil.createConf();
try {
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0).build();
cluster.waitActive();
final DistributedFileSystem dfs = cluster.getFileSystem();
final FileSystem webHdfs = WebHdfsTestUtil.getWebHdfsFileSystem(conf,
WebHdfsFileSystem.SCHEME);
final Path foo = new Path("/foo");
dfs.mkdirs(foo);
dfs.allowSnapshot(foo);
webHdfs.createSnapshot(foo, "s1");
final Path s1path = SnapshotTestHelper.getSnapshotRoot(foo, "s1");
Assert.assertTrue(webHdfs.exists(s1path));
// rename s1 to s2
webHdfs.renameSnapshot(foo, "s1", "s2");
Assert.assertFalse(webHdfs.exists(s1path));
final Path s2path = SnapshotTestHelper.getSnapshotRoot(foo, "s2");
Assert.assertTrue(webHdfs.exists(s2path));
webHdfs.deleteSnapshot(foo, "s2");
Assert.assertFalse(webHdfs.exists(s2path));
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
}

8
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/resources/TestParam.java
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@ -357,4 +357,12 @@ public class TestParam {
Assert.assertEquals(p1.getValue(), EnumSet.of(
Options.Rename.OVERWRITE, Options.Rename.NONE));
}
@Test
public void testSnapshotNameParam() {
final OldSnapshotNameParam s1 = new OldSnapshotNameParam("s1");
final SnapshotNameParam s2 = new SnapshotNameParam("s2");
Assert.assertEquals("s1", s1.getValue());
Assert.assertEquals("s2", s2.getValue());
}
}