HDFS-13215. RBF: Move Router to its own module. Contributed by Wei Yan

dev-support/bin/dist-layout-stitching

@@ -129,6 +129,7 @@ run copy "${ROOT}/hadoop-hdfs-project/hadoop-hdfs/target/hadoop-hdfs-${VERSION}"
 run copy "${ROOT}/hadoop-hdfs-project/hadoop-hdfs-nfs/target/hadoop-hdfs-nfs-${VERSION}" .
 run copy "${ROOT}/hadoop-hdfs-project/hadoop-hdfs-client/target/hadoop-hdfs-client-${VERSION}" .
 run copy "${ROOT}/hadoop-hdfs-project/hadoop-hdfs-native-client/target/hadoop-hdfs-native-client-${VERSION}" .
+run copy "${ROOT}/hadoop-hdfs-project/hadoop-hdfs-rbf/target/hadoop-hdfs-rbf-${VERSION}" .
 run copy "${ROOT}/hadoop-yarn-project/target/hadoop-yarn-project-${VERSION}" .
 run copy "${ROOT}/hadoop-mapreduce-project/target/hadoop-mapreduce-${VERSION}" .
 run copy "${ROOT}/hadoop-tools/hadoop-tools-dist/target/hadoop-tools-dist-${VERSION}" .

hadoop-hdfs-project/hadoop-hdfs-rbf/dev-support/findbugsExcludeFile.xml

@@ -0,0 +1,22 @@
+<!--
+   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.
+-->
+
+<FindBugsFilter>
+  <Match>
+    <Package name="org.apache.hadoop.hdfs.federation.protocol.proto" />
+  </Match>
+</FindBugsFilter>

hadoop-hdfs-project/hadoop-hdfs-rbf/pom.xml

@@ -0,0 +1,236 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  Licensed 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. See accompanying LICENSE file.
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
+http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>org.apache.hadoop</groupId>
+    <artifactId>hadoop-project-dist</artifactId>
+    <version>3.2.0-SNAPSHOT</version>
+    <relativePath>../../hadoop-project-dist</relativePath>
+  </parent>
+  <artifactId>hadoop-hdfs-rbf</artifactId>
+  <version>3.2.0-SNAPSHOT</version>
+  <description>Apache Hadoop HDFS-RBF</description>
+  <name>Apache Hadoop HDFS-RBF</name>
+  <packaging>jar</packaging>
+
+  <properties>
+    <hadoop.component>hdfs</hadoop.component>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.hadoop</groupId>
+      <artifactId>hadoop-common</artifactId>
+      <scope>provided</scope>
+      <exclusions>
+        <exclusion>
+          <groupId>commons-logging</groupId>
+          <artifactId>commons-logging</artifactId>
+        </exclusion>
+        <exclusion>
+          <groupId>log4j</groupId>
+          <artifactId>log4j</artifactId>
+        </exclusion>
+      </exclusions>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hadoop</groupId>
+      <artifactId>hadoop-hdfs</artifactId>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hadoop</groupId>
+      <artifactId>hadoop-hdfs-client</artifactId>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-log4j12</artifactId>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.eclipse.jetty</groupId>
+      <artifactId>jetty-util-ajax</artifactId>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hadoop</groupId>
+      <artifactId>hadoop-common</artifactId>
+      <scope>test</scope>
+      <type>test-jar</type>
+    </dependency>
+    <dependency>
+      <groupId>com.fasterxml.jackson.core</groupId>
+      <artifactId>jackson-annotations</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>com.fasterxml.jackson.core</groupId>
+      <artifactId>jackson-databind</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hadoop</groupId>
+      <artifactId>hadoop-hdfs</artifactId>
+      <scope>test</scope>
+      <type>test-jar</type>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.curator</groupId>
+      <artifactId>curator-test</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.mockito</groupId>
+      <artifactId>mockito-all</artifactId>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-surefire-plugin</artifactId>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-antrun-plugin</artifactId>
+        <configuration>
+          <skipTests>false</skipTests>
+        </configuration>
+        <executions>
+          <execution>
+            <id>create-web-xmls</id>
+            <phase>compile</phase>
+            <goals>
+              <goal>run</goal>
+            </goals>
+            <configuration>
+              <target>
+                <copy file="${basedir}/src/main/webapps/proto-web.xml"
+                      tofile="${project.build.directory}/webapps/router/WEB-INF/web.xml"
+                      filtering="true"/>
+                <copy toDir="${project.build.directory}/webapps">
+                  <fileset dir="${basedir}/src/main/webapps">
+                    <exclude name="**/proto-web.xml"/>
+                  </fileset>
+                </copy>
+                <replace dir="${project.build.directory}/webapps" value="${release-year}">
+                  <include name="**/*.html"/>
+                  <replacetoken>{release-year-token}</replacetoken>
+                </replace>
+              </target>
+            </configuration>
+          </execution>
+          <execution>
+            <id>create-log-dir</id>
+            <phase>process-test-resources</phase>
+            <goals>
+              <goal>run</goal>
+            </goals>
+            <configuration>
+              <target>
+                <copy todir="${project.build.directory}/test-classes/webapps">
+                  <fileset dir="${project.build.directory}/webapps">
+                    <exclude name="proto-*-web.xml"/>
+                    <exclude name="**/proto-web.xml"/>
+                  </fileset>
+                </copy>
+              </target>
+            </configuration>
+          </execution>
+          <execution>
+            <phase>pre-site</phase>
+            <goals>
+              <goal>run</goal>
+            </goals>
+            <configuration>
+              <tasks>
+                <copy file="src/main/resources/hdfs-rbf-default.xml" todir="src/site/resources"/>
+              </tasks>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.hadoop</groupId>
+        <artifactId>hadoop-maven-plugins</artifactId>
+        <executions>
+          <execution>
+            <id>compile-protoc</id>
+            <goals>
+              <goal>protoc</goal>
+            </goals>
+            <configuration>
+              <protocVersion>${protobuf.version}</protocVersion>
+              <protocCommand>${protoc.path}</protocCommand>
+              <imports>
+                <param>${basedir}/../hadoop-hdfs-client/src/main/proto</param>
+                <param>${basedir}/../../hadoop-common-project/hadoop-common/src/main/proto</param>
+                <param>${basedir}/src/main/proto</param>
+              </imports>
+              <source>
+                <directory>${basedir}/src/main/proto</directory>
+                <includes>
+                  <include>FederationProtocol.proto</include>
+                  <include>RouterProtocol.proto</include>
+                </includes>
+              </source>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-javadoc-plugin</artifactId>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.rat</groupId>
+        <artifactId>apache-rat-plugin</artifactId>
+        <configuration>
+          <excludes>
+            <exclude>.gitattributes</exclude>
+            <exclude>.idea/**</exclude>
+            <exclude>dev-support/findbugsExcludeFile.xml</exclude>
+            <exclude>src/main/webapps/router/robots.txt</exclude>
+            <exclude>src/site/resources/images/*</exclude>
+          </excludes>
+        </configuration>
+      </plugin>
+      <plugin>
+        <artifactId>maven-clean-plugin</artifactId>
+        <configuration>
+          <filesets>
+            <fileset>
+              <directory>src/site/resources</directory>
+              <includes>
+                <include>hdfs-rbf-default.xml</include>
+              </includes>
+              <followSymlinks>false</followSymlinks>
+            </fileset>
+          </filesets>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+</project>

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/protocolPB/package-info.java

@@ -0,0 +1,18 @@
+/**
+ * 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.protocolPB;

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/resolver/MountTableResolver.java

@@ -17,9 +17,9 @@
  */
 package org.apache.hadoop.hdfs.server.federation.resolver;
 
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_ROUTER_DEFAULT_NAMESERVICE;
+import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_DEFAULT_NAMESERVICE;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.FEDERATION_MOUNT_TABLE_MAX_CACHE_SIZE;
+import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.FEDERATION_MOUNT_TABLE_MAX_CACHE_SIZE;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.FEDERATION_MOUNT_TABLE_MAX_CACHE_SIZE_DEFAULT;
+import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.FEDERATION_MOUNT_TABLE_MAX_CACHE_SIZE_DEFAULT;
 import static org.apache.hadoop.hdfs.server.federation.router.FederationUtil.isParentEntry;
 
 import java.io.IOException;

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/resolver/order/LocalResolver.java

@@ -33,10 +33,10 @@
 import java.util.concurrent.TimeUnit;
 
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
 import org.apache.hadoop.hdfs.protocol.HdfsConstants.DatanodeReportType;
 import org.apache.hadoop.hdfs.server.federation.resolver.PathLocation;
+import org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys;
 import org.apache.hadoop.hdfs.server.federation.router.Router;
 import org.apache.hadoop.hdfs.server.federation.router.RouterRpcServer;
 import org.apache.hadoop.hdfs.server.federation.store.MembershipStore;
@@ -62,7 +62,7 @@ public class LocalResolver implements OrderedResolver {
 
   /** Configuration key to set the minimum time to update the local cache.*/
   public static final String MIN_UPDATE_PERIOD_KEY =
-      DFSConfigKeys.FEDERATION_ROUTER_PREFIX + "local-resolver.update-period";
+      RBFConfigKeys.FEDERATION_ROUTER_PREFIX + "local-resolver.update-period";
   /** 10 seconds by default. */
   private static final long MIN_UPDATE_PERIOD_DEFAULT =
       TimeUnit.SECONDS.toMillis(10);

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/ConnectionManager.java

@@ -34,7 +34,6 @@
 
 import com.google.common.annotations.VisibleForTesting;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.util.Time;
 import org.eclipse.jetty.util.ajax.JSON;
@@ -100,8 +99,8 @@ public ConnectionManager(Configuration config) {
 
     // Configure minimum and maximum connection pools
     this.maxSize = this.conf.getInt(
-        DFSConfigKeys.DFS_ROUTER_NAMENODE_CONNECTION_POOL_SIZE,
+        RBFConfigKeys.DFS_ROUTER_NAMENODE_CONNECTION_POOL_SIZE,
-        DFSConfigKeys.DFS_ROUTER_NAMENODE_CONNECTION_POOL_SIZE_DEFAULT);
+        RBFConfigKeys.DFS_ROUTER_NAMENODE_CONNECTION_POOL_SIZE_DEFAULT);
 
     // Map with the connections indexed by UGI and Namenode
     this.pools = new HashMap<>();
@@ -112,13 +111,13 @@ public ConnectionManager(Configuration config) {
 
     // Cleanup periods
     this.poolCleanupPeriodMs = this.conf.getLong(
-        DFSConfigKeys.DFS_ROUTER_NAMENODE_CONNECTION_POOL_CLEAN,
+        RBFConfigKeys.DFS_ROUTER_NAMENODE_CONNECTION_POOL_CLEAN,
-        DFSConfigKeys.DFS_ROUTER_NAMENODE_CONNECTION_POOL_CLEAN_DEFAULT);
+        RBFConfigKeys.DFS_ROUTER_NAMENODE_CONNECTION_POOL_CLEAN_DEFAULT);
     LOG.info("Cleaning connection pools every {} seconds",
         TimeUnit.MILLISECONDS.toSeconds(this.poolCleanupPeriodMs));
     this.connectionCleanupPeriodMs = this.conf.getLong(
-        DFSConfigKeys.DFS_ROUTER_NAMENODE_CONNECTION_CLEAN_MS,
+        RBFConfigKeys.DFS_ROUTER_NAMENODE_CONNECTION_CLEAN_MS,
-        DFSConfigKeys.DFS_ROUTER_NAMENODE_CONNECTION_CLEAN_MS_DEFAULT);
+        RBFConfigKeys.DFS_ROUTER_NAMENODE_CONNECTION_CLEAN_MS_DEFAULT);
     LOG.info("Cleaning connections every {} seconds",
         TimeUnit.MILLISECONDS.toSeconds(this.connectionCleanupPeriodMs));
   }

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/FederationUtil.java

@@ -27,7 +27,6 @@
 
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.server.federation.resolver.ActiveNamenodeResolver;
 import org.apache.hadoop.hdfs.server.federation.resolver.FileSubclusterResolver;
 import org.apache.hadoop.hdfs.server.federation.store.StateStoreService;
@@ -166,8 +165,8 @@ private static <T, R> T newInstance(final Configuration conf,
   public static FileSubclusterResolver newFileSubclusterResolver(
       Configuration conf, Router router) {
     Class<? extends FileSubclusterResolver> clazz = conf.getClass(
-        DFSConfigKeys.FEDERATION_FILE_RESOLVER_CLIENT_CLASS,
+        RBFConfigKeys.FEDERATION_FILE_RESOLVER_CLIENT_CLASS,
-        DFSConfigKeys.FEDERATION_FILE_RESOLVER_CLIENT_CLASS_DEFAULT,
+        RBFConfigKeys.FEDERATION_FILE_RESOLVER_CLIENT_CLASS_DEFAULT,
         FileSubclusterResolver.class);
     return newInstance(conf, router, Router.class, clazz);
   }
@@ -182,8 +181,8 @@ public static FileSubclusterResolver newFileSubclusterResolver(
   public static ActiveNamenodeResolver newActiveNamenodeResolver(
       Configuration conf, StateStoreService stateStore) {
     Class<? extends ActiveNamenodeResolver> clazz = conf.getClass(
-        DFSConfigKeys.FEDERATION_NAMENODE_RESOLVER_CLIENT_CLASS,
+        RBFConfigKeys.FEDERATION_NAMENODE_RESOLVER_CLIENT_CLASS,
-        DFSConfigKeys.FEDERATION_NAMENODE_RESOLVER_CLIENT_CLASS_DEFAULT,
+        RBFConfigKeys.FEDERATION_NAMENODE_RESOLVER_CLIENT_CLASS_DEFAULT,
         ActiveNamenodeResolver.class);
     return newInstance(conf, stateStore, StateStoreService.class, clazz);
   }

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/NamenodeHeartbeatService.java

@@ -17,8 +17,8 @@
  */
 package org.apache.hadoop.hdfs.server.federation.router;
 
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_ROUTER_HEARTBEAT_INTERVAL_MS;
+import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_HEARTBEAT_INTERVAL_MS;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_ROUTER_HEARTBEAT_INTERVAL_MS_DEFAULT;
+import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_HEARTBEAT_INTERVAL_MS_DEFAULT;
 
 import java.io.IOException;
 import java.net.InetAddress;

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RBFConfigKeys.java

@@ -0,0 +1,229 @@
+/**
+ * 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.server.federation.router;
+
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.fs.CommonConfigurationKeysPublic;
+import org.apache.hadoop.hdfs.server.federation.metrics.FederationRPCPerformanceMonitor;
+import org.apache.hadoop.hdfs.server.federation.resolver.ActiveNamenodeResolver;
+import org.apache.hadoop.hdfs.server.federation.resolver.FileSubclusterResolver;
+import org.apache.hadoop.hdfs.server.federation.resolver.MembershipNamenodeResolver;
+import org.apache.hadoop.hdfs.server.federation.resolver.MountTableResolver;
+import org.apache.hadoop.hdfs.server.federation.store.driver.StateStoreDriver;
+import org.apache.hadoop.hdfs.server.federation.store.driver.impl.StateStoreSerializerPBImpl;
+import org.apache.hadoop.hdfs.server.federation.store.driver.impl.StateStoreZooKeeperImpl;
+
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Config fields for router-based hdfs federation.
+ */
+@InterfaceAudience.Private
+public class RBFConfigKeys extends CommonConfigurationKeysPublic {
+
+  // HDFS Router-based federation
+  public static final String FEDERATION_ROUTER_PREFIX =
+      "dfs.federation.router.";
+  public static final String DFS_ROUTER_DEFAULT_NAMESERVICE =
+      FEDERATION_ROUTER_PREFIX + "default.nameserviceId";
+  public static final String DFS_ROUTER_HANDLER_COUNT_KEY =
+      FEDERATION_ROUTER_PREFIX + "handler.count";
+  public static final int DFS_ROUTER_HANDLER_COUNT_DEFAULT = 10;
+  public static final String DFS_ROUTER_READER_QUEUE_SIZE_KEY =
+      FEDERATION_ROUTER_PREFIX + "reader.queue.size";
+  public static final int DFS_ROUTER_READER_QUEUE_SIZE_DEFAULT = 100;
+  public static final String DFS_ROUTER_READER_COUNT_KEY =
+      FEDERATION_ROUTER_PREFIX + "reader.count";
+  public static final int DFS_ROUTER_READER_COUNT_DEFAULT = 1;
+  public static final String DFS_ROUTER_HANDLER_QUEUE_SIZE_KEY =
+      FEDERATION_ROUTER_PREFIX + "handler.queue.size";
+  public static final int DFS_ROUTER_HANDLER_QUEUE_SIZE_DEFAULT = 100;
+  public static final String DFS_ROUTER_RPC_BIND_HOST_KEY =
+      FEDERATION_ROUTER_PREFIX + "rpc-bind-host";
+  public static final int DFS_ROUTER_RPC_PORT_DEFAULT = 8888;
+  public static final String DFS_ROUTER_RPC_ADDRESS_KEY =
+      FEDERATION_ROUTER_PREFIX + "rpc-address";
+  public static final String DFS_ROUTER_RPC_ADDRESS_DEFAULT =
+      "0.0.0.0:" + DFS_ROUTER_RPC_PORT_DEFAULT;
+  public static final String DFS_ROUTER_RPC_ENABLE =
+      FEDERATION_ROUTER_PREFIX + "rpc.enable";
+  public static final boolean DFS_ROUTER_RPC_ENABLE_DEFAULT = true;
+
+  public static final String DFS_ROUTER_METRICS_ENABLE =
+      FEDERATION_ROUTER_PREFIX + "metrics.enable";
+  public static final boolean DFS_ROUTER_METRICS_ENABLE_DEFAULT = true;
+  public static final String DFS_ROUTER_METRICS_CLASS =
+      FEDERATION_ROUTER_PREFIX + "metrics.class";
+  public static final Class<? extends RouterRpcMonitor>
+      DFS_ROUTER_METRICS_CLASS_DEFAULT =
+      FederationRPCPerformanceMonitor.class;
+
+  // HDFS Router heartbeat
+  public static final String DFS_ROUTER_HEARTBEAT_ENABLE =
+      FEDERATION_ROUTER_PREFIX + "heartbeat.enable";
+  public static final boolean DFS_ROUTER_HEARTBEAT_ENABLE_DEFAULT = true;
+  public static final String DFS_ROUTER_HEARTBEAT_INTERVAL_MS =
+      FEDERATION_ROUTER_PREFIX + "heartbeat.interval";
+  public static final long DFS_ROUTER_HEARTBEAT_INTERVAL_MS_DEFAULT =
+      TimeUnit.SECONDS.toMillis(5);
+  public static final String DFS_ROUTER_MONITOR_NAMENODE =
+      FEDERATION_ROUTER_PREFIX + "monitor.namenode";
+  public static final String DFS_ROUTER_MONITOR_LOCAL_NAMENODE =
+      FEDERATION_ROUTER_PREFIX + "monitor.localnamenode.enable";
+  public static final boolean DFS_ROUTER_MONITOR_LOCAL_NAMENODE_DEFAULT = true;
+  public static final String DFS_ROUTER_HEARTBEAT_STATE_INTERVAL_MS =
+      FEDERATION_ROUTER_PREFIX + "heartbeat-state.interval";
+  public static final long DFS_ROUTER_HEARTBEAT_STATE_INTERVAL_MS_DEFAULT =
+      TimeUnit.SECONDS.toMillis(5);
+
+  // HDFS Router NN client
+  public static final String DFS_ROUTER_NAMENODE_CONNECTION_POOL_SIZE =
+      FEDERATION_ROUTER_PREFIX + "connection.pool-size";
+  public static final int DFS_ROUTER_NAMENODE_CONNECTION_POOL_SIZE_DEFAULT =
+      64;
+  public static final String DFS_ROUTER_NAMENODE_CONNECTION_POOL_CLEAN =
+      FEDERATION_ROUTER_PREFIX + "connection.pool.clean.ms";
+  public static final long DFS_ROUTER_NAMENODE_CONNECTION_POOL_CLEAN_DEFAULT =
+      TimeUnit.MINUTES.toMillis(1);
+  public static final String DFS_ROUTER_NAMENODE_CONNECTION_CLEAN_MS =
+      FEDERATION_ROUTER_PREFIX + "connection.clean.ms";
+  public static final long DFS_ROUTER_NAMENODE_CONNECTION_CLEAN_MS_DEFAULT =
+      TimeUnit.SECONDS.toMillis(10);
+
+  // HDFS Router RPC client
+  public static final String DFS_ROUTER_CLIENT_THREADS_SIZE =
+      FEDERATION_ROUTER_PREFIX + "client.thread-size";
+  public static final int DFS_ROUTER_CLIENT_THREADS_SIZE_DEFAULT = 32;
+  public static final String DFS_ROUTER_CLIENT_MAX_ATTEMPTS =
+      FEDERATION_ROUTER_PREFIX + "client.retry.max.attempts";
+  public static final int DFS_ROUTER_CLIENT_MAX_ATTEMPTS_DEFAULT = 3;
+
+  // HDFS Router State Store connection
+  public static final String FEDERATION_FILE_RESOLVER_CLIENT_CLASS =
+      FEDERATION_ROUTER_PREFIX + "file.resolver.client.class";
+  public static final Class<? extends FileSubclusterResolver>
+      FEDERATION_FILE_RESOLVER_CLIENT_CLASS_DEFAULT =
+      MountTableResolver.class;
+  public static final String FEDERATION_NAMENODE_RESOLVER_CLIENT_CLASS =
+      FEDERATION_ROUTER_PREFIX + "namenode.resolver.client.class";
+  public static final Class<? extends ActiveNamenodeResolver>
+      FEDERATION_NAMENODE_RESOLVER_CLIENT_CLASS_DEFAULT =
+      MembershipNamenodeResolver.class;
+
+  // HDFS Router-based federation State Store
+  public static final String FEDERATION_STORE_PREFIX =
+      FEDERATION_ROUTER_PREFIX + "store.";
+
+  public static final String DFS_ROUTER_STORE_ENABLE =
+      FEDERATION_STORE_PREFIX + "enable";
+  public static final boolean DFS_ROUTER_STORE_ENABLE_DEFAULT = true;
+
+  public static final String FEDERATION_STORE_SERIALIZER_CLASS =
+      FEDERATION_STORE_PREFIX + "serializer";
+  public static final Class<StateStoreSerializerPBImpl>
+      FEDERATION_STORE_SERIALIZER_CLASS_DEFAULT =
+      StateStoreSerializerPBImpl.class;
+
+  public static final String FEDERATION_STORE_DRIVER_CLASS =
+      FEDERATION_STORE_PREFIX + "driver.class";
+  public static final Class<? extends StateStoreDriver>
+      FEDERATION_STORE_DRIVER_CLASS_DEFAULT = StateStoreZooKeeperImpl.class;
+
+  public static final String FEDERATION_STORE_CONNECTION_TEST_MS =
+      FEDERATION_STORE_PREFIX + "connection.test";
+  public static final long FEDERATION_STORE_CONNECTION_TEST_MS_DEFAULT =
+      TimeUnit.MINUTES.toMillis(1);
+
+  public static final String DFS_ROUTER_CACHE_TIME_TO_LIVE_MS =
+      FEDERATION_ROUTER_PREFIX + "cache.ttl";
+  public static final long DFS_ROUTER_CACHE_TIME_TO_LIVE_MS_DEFAULT =
+      TimeUnit.MINUTES.toMillis(1);
+
+  public static final String FEDERATION_STORE_MEMBERSHIP_EXPIRATION_MS =
+      FEDERATION_STORE_PREFIX + "membership.expiration";
+  public static final long FEDERATION_STORE_MEMBERSHIP_EXPIRATION_MS_DEFAULT =
+      TimeUnit.MINUTES.toMillis(5);
+  public static final String FEDERATION_STORE_ROUTER_EXPIRATION_MS =
+      FEDERATION_STORE_PREFIX + "router.expiration";
+  public static final long FEDERATION_STORE_ROUTER_EXPIRATION_MS_DEFAULT =
+      TimeUnit.MINUTES.toMillis(5);
+
+  // HDFS Router safe mode
+  public static final String DFS_ROUTER_SAFEMODE_ENABLE =
+      FEDERATION_ROUTER_PREFIX + "safemode.enable";
+  public static final boolean DFS_ROUTER_SAFEMODE_ENABLE_DEFAULT = true;
+  public static final String DFS_ROUTER_SAFEMODE_EXTENSION =
+      FEDERATION_ROUTER_PREFIX + "safemode.extension";
+  public static final long DFS_ROUTER_SAFEMODE_EXTENSION_DEFAULT =
+      TimeUnit.SECONDS.toMillis(30);
+  public static final String DFS_ROUTER_SAFEMODE_EXPIRATION =
+      FEDERATION_ROUTER_PREFIX + "safemode.expiration";
+  public static final long DFS_ROUTER_SAFEMODE_EXPIRATION_DEFAULT =
+      3 * DFS_ROUTER_CACHE_TIME_TO_LIVE_MS_DEFAULT;
+
+  // HDFS Router-based federation mount table entries
+  /** Maximum number of cache entries to have. */
+  public static final String FEDERATION_MOUNT_TABLE_MAX_CACHE_SIZE =
+      FEDERATION_ROUTER_PREFIX + "mount-table.max-cache-size";
+  /** Remove cache entries if we have more than 10k. */
+  public static final int FEDERATION_MOUNT_TABLE_MAX_CACHE_SIZE_DEFAULT = 10000;
+
+  // HDFS Router-based federation admin
+  public static final String DFS_ROUTER_ADMIN_HANDLER_COUNT_KEY =
+      FEDERATION_ROUTER_PREFIX + "admin.handler.count";
+  public static final int DFS_ROUTER_ADMIN_HANDLER_COUNT_DEFAULT = 1;
+  public static final int    DFS_ROUTER_ADMIN_PORT_DEFAULT = 8111;
+  public static final String DFS_ROUTER_ADMIN_ADDRESS_KEY =
+      FEDERATION_ROUTER_PREFIX + "admin-address";
+  public static final String DFS_ROUTER_ADMIN_ADDRESS_DEFAULT =
+      "0.0.0.0:" + DFS_ROUTER_ADMIN_PORT_DEFAULT;
+  public static final String DFS_ROUTER_ADMIN_BIND_HOST_KEY =
+      FEDERATION_ROUTER_PREFIX + "admin-bind-host";
+  public static final String DFS_ROUTER_ADMIN_ENABLE =
+      FEDERATION_ROUTER_PREFIX + "admin.enable";
+  public static final boolean DFS_ROUTER_ADMIN_ENABLE_DEFAULT = true;
+
+  // HDFS Router-based federation web
+  public static final String DFS_ROUTER_HTTP_ENABLE =
+      FEDERATION_ROUTER_PREFIX + "http.enable";
+  public static final boolean DFS_ROUTER_HTTP_ENABLE_DEFAULT = true;
+  public static final String DFS_ROUTER_HTTP_ADDRESS_KEY =
+      FEDERATION_ROUTER_PREFIX + "http-address";
+  public static final int    DFS_ROUTER_HTTP_PORT_DEFAULT = 50071;
+  public static final String DFS_ROUTER_HTTP_BIND_HOST_KEY =
+      FEDERATION_ROUTER_PREFIX + "http-bind-host";
+  public static final String DFS_ROUTER_HTTP_ADDRESS_DEFAULT =
+      "0.0.0.0:" + DFS_ROUTER_HTTP_PORT_DEFAULT;
+  public static final String DFS_ROUTER_HTTPS_ADDRESS_KEY =
+      FEDERATION_ROUTER_PREFIX + "https-address";
+  public static final int    DFS_ROUTER_HTTPS_PORT_DEFAULT = 50072;
+  public static final String DFS_ROUTER_HTTPS_BIND_HOST_KEY =
+      FEDERATION_ROUTER_PREFIX + "https-bind-host";
+  public static final String DFS_ROUTER_HTTPS_ADDRESS_DEFAULT =
+      "0.0.0.0:" + DFS_ROUTER_HTTPS_PORT_DEFAULT;
+
+  // HDFS Router-based federation quota
+  public static final String DFS_ROUTER_QUOTA_ENABLE =
+      FEDERATION_ROUTER_PREFIX + "quota.enable";
+  public static final boolean DFS_ROUTER_QUOTA_ENABLED_DEFAULT = false;
+  public static final String DFS_ROUTER_QUOTA_CACHE_UPATE_INTERVAL =
+      FEDERATION_ROUTER_PREFIX + "quota-cache.update.interval";
+  public static final long DFS_ROUTER_QUOTA_CACHE_UPATE_INTERVAL_DEFAULT =
+      60000;
+}

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/Router.java

@@ -31,7 +31,6 @@
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.DFSUtil;
 import org.apache.hadoop.hdfs.HAUtil;
 import org.apache.hadoop.hdfs.server.federation.metrics.FederationMetrics;
@@ -146,8 +145,8 @@ protected void serviceInit(Configuration configuration) throws Exception {
     updateRouterState(RouterServiceState.INITIALIZING);
 
     if (conf.getBoolean(
-        DFSConfigKeys.DFS_ROUTER_STORE_ENABLE,
+        RBFConfigKeys.DFS_ROUTER_STORE_ENABLE,
-        DFSConfigKeys.DFS_ROUTER_STORE_ENABLE_DEFAULT)) {
+        RBFConfigKeys.DFS_ROUTER_STORE_ENABLE_DEFAULT)) {
       // Service that maintains the State Store connection
       this.stateStore = new StateStoreService();
       addService(this.stateStore);
@@ -167,8 +166,8 @@ protected void serviceInit(Configuration configuration) throws Exception {
     }
 
     if (conf.getBoolean(
-        DFSConfigKeys.DFS_ROUTER_RPC_ENABLE,
+        RBFConfigKeys.DFS_ROUTER_RPC_ENABLE,
-        DFSConfigKeys.DFS_ROUTER_RPC_ENABLE_DEFAULT)) {
+        RBFConfigKeys.DFS_ROUTER_RPC_ENABLE_DEFAULT)) {
       // Create RPC server
       this.rpcServer = createRpcServer();
       addService(this.rpcServer);
@@ -176,24 +175,24 @@ protected void serviceInit(Configuration configuration) throws Exception {
     }
 
     if (conf.getBoolean(
-        DFSConfigKeys.DFS_ROUTER_ADMIN_ENABLE,
+        RBFConfigKeys.DFS_ROUTER_ADMIN_ENABLE,
-        DFSConfigKeys.DFS_ROUTER_ADMIN_ENABLE_DEFAULT)) {
+        RBFConfigKeys.DFS_ROUTER_ADMIN_ENABLE_DEFAULT)) {
       // Create admin server
       this.adminServer = createAdminServer();
       addService(this.adminServer);
     }
 
     if (conf.getBoolean(
-        DFSConfigKeys.DFS_ROUTER_HTTP_ENABLE,
+        RBFConfigKeys.DFS_ROUTER_HTTP_ENABLE,
-        DFSConfigKeys.DFS_ROUTER_HTTP_ENABLE_DEFAULT)) {
+        RBFConfigKeys.DFS_ROUTER_HTTP_ENABLE_DEFAULT)) {
       // Create HTTP server
       this.httpServer = createHttpServer();
       addService(this.httpServer);
     }
 
     if (conf.getBoolean(
-        DFSConfigKeys.DFS_ROUTER_HEARTBEAT_ENABLE,
+        RBFConfigKeys.DFS_ROUTER_HEARTBEAT_ENABLE,
-        DFSConfigKeys.DFS_ROUTER_HEARTBEAT_ENABLE_DEFAULT)) {
+        RBFConfigKeys.DFS_ROUTER_HEARTBEAT_ENABLE_DEFAULT)) {
 
       // Create status updater for each monitored Namenode
       this.namenodeHeartbeatServices = createNamenodeHeartbeatServices();
@@ -213,8 +212,8 @@ protected void serviceInit(Configuration configuration) throws Exception {
 
     // Router metrics system
     if (conf.getBoolean(
-        DFSConfigKeys.DFS_ROUTER_METRICS_ENABLE,
+        RBFConfigKeys.DFS_ROUTER_METRICS_ENABLE,
-        DFSConfigKeys.DFS_ROUTER_METRICS_ENABLE_DEFAULT)) {
+        RBFConfigKeys.DFS_ROUTER_METRICS_ENABLE_DEFAULT)) {
 
       DefaultMetricsSystem.initialize("Router");
 
@@ -227,8 +226,8 @@ protected void serviceInit(Configuration configuration) throws Exception {
     }
 
     // Initial quota relevant service
-    if (conf.getBoolean(DFSConfigKeys.DFS_ROUTER_QUOTA_ENABLE,
+    if (conf.getBoolean(RBFConfigKeys.DFS_ROUTER_QUOTA_ENABLE,
-        DFSConfigKeys.DFS_ROUTER_QUOTA_ENABLED_DEFAULT)) {
+        RBFConfigKeys.DFS_ROUTER_QUOTA_ENABLED_DEFAULT)) {
       this.quotaManager = new RouterQuotaManager();
       this.quotaUpdateService = new RouterQuotaUpdateService(this);
       addService(this.quotaUpdateService);
@@ -236,8 +235,8 @@ protected void serviceInit(Configuration configuration) throws Exception {
 
     // Safemode service to refuse RPC calls when the router is out of sync
     if (conf.getBoolean(
-        DFSConfigKeys.DFS_ROUTER_SAFEMODE_ENABLE,
+        RBFConfigKeys.DFS_ROUTER_SAFEMODE_ENABLE,
-        DFSConfigKeys.DFS_ROUTER_SAFEMODE_ENABLE_DEFAULT)) {
+        RBFConfigKeys.DFS_ROUTER_SAFEMODE_ENABLE_DEFAULT)) {
       // Create safemode monitoring service
       this.safemodeService = new RouterSafemodeService(this);
       addService(this.safemodeService);
@@ -416,8 +415,8 @@ public InetSocketAddress getHttpServerAddress() {
     Map<String, NamenodeHeartbeatService> ret = new HashMap<>();
 
     if (conf.getBoolean(
-        DFSConfigKeys.DFS_ROUTER_MONITOR_LOCAL_NAMENODE,
+        RBFConfigKeys.DFS_ROUTER_MONITOR_LOCAL_NAMENODE,
-        DFSConfigKeys.DFS_ROUTER_MONITOR_LOCAL_NAMENODE_DEFAULT)) {
+        RBFConfigKeys.DFS_ROUTER_MONITOR_LOCAL_NAMENODE_DEFAULT)) {
       // Create a local heartbet service
       NamenodeHeartbeatService localHeartbeatService =
           createLocalNamenodeHearbeatService();
@@ -429,7 +428,7 @@ public InetSocketAddress getHttpServerAddress() {
 
     // Create heartbeat services for a list specified by the admin
     String namenodes = this.conf.get(
-        DFSConfigKeys.DFS_ROUTER_MONITOR_NAMENODE);
+        RBFConfigKeys.DFS_ROUTER_MONITOR_NAMENODE);
     if (namenodes != null) {
       for (String namenode : namenodes.split(",")) {
         String[] namenodeSplit = namenode.split("\\.");

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterAdminServer.java

@@ -93,8 +93,8 @@ public RouterAdminServer(Configuration conf, Router router)
     this.router = router;
 
     int handlerCount = this.conf.getInt(
-        DFSConfigKeys.DFS_ROUTER_ADMIN_HANDLER_COUNT_KEY,
+        RBFConfigKeys.DFS_ROUTER_ADMIN_HANDLER_COUNT_KEY,
-        DFSConfigKeys.DFS_ROUTER_ADMIN_HANDLER_COUNT_DEFAULT);
+        RBFConfigKeys.DFS_ROUTER_ADMIN_HANDLER_COUNT_DEFAULT);
 
     RPC.setProtocolEngine(this.conf, RouterAdminProtocolPB.class,
         ProtobufRpcEngine.class);
@@ -105,13 +105,13 @@ public RouterAdminServer(Configuration conf, Router router)
         newReflectiveBlockingService(routerAdminProtocolTranslator);
 
     InetSocketAddress confRpcAddress = conf.getSocketAddr(
-        DFSConfigKeys.DFS_ROUTER_ADMIN_BIND_HOST_KEY,
+        RBFConfigKeys.DFS_ROUTER_ADMIN_BIND_HOST_KEY,
-        DFSConfigKeys.DFS_ROUTER_ADMIN_ADDRESS_KEY,
+        RBFConfigKeys.DFS_ROUTER_ADMIN_ADDRESS_KEY,
-        DFSConfigKeys.DFS_ROUTER_ADMIN_ADDRESS_DEFAULT,
+        RBFConfigKeys.DFS_ROUTER_ADMIN_ADDRESS_DEFAULT,
-        DFSConfigKeys.DFS_ROUTER_ADMIN_PORT_DEFAULT);
+        RBFConfigKeys.DFS_ROUTER_ADMIN_PORT_DEFAULT);
 
     String bindHost = conf.get(
-        DFSConfigKeys.DFS_ROUTER_ADMIN_BIND_HOST_KEY,
+        RBFConfigKeys.DFS_ROUTER_ADMIN_BIND_HOST_KEY,
         confRpcAddress.getHostName());
     LOG.info("Admin server binding to {}:{}",
         bindHost, confRpcAddress.getPort());

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterHeartbeatService.java

@@ -23,7 +23,6 @@
 
 import com.google.common.annotations.VisibleForTesting;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.server.federation.store.CachedRecordStore;
 import org.apache.hadoop.hdfs.server.federation.store.MembershipStore;
 import org.apache.hadoop.hdfs.server.federation.store.MountTableStore;
@@ -142,8 +141,8 @@ long getStateStoreVersion(final Class<S> clazz) {
   protected void serviceInit(Configuration conf) throws Exception {
 
     long interval = conf.getTimeDuration(
-        DFSConfigKeys.DFS_ROUTER_HEARTBEAT_STATE_INTERVAL_MS,
+        RBFConfigKeys.DFS_ROUTER_HEARTBEAT_STATE_INTERVAL_MS,
-        DFSConfigKeys.DFS_ROUTER_HEARTBEAT_STATE_INTERVAL_MS_DEFAULT,
+        RBFConfigKeys.DFS_ROUTER_HEARTBEAT_STATE_INTERVAL_MS_DEFAULT,
         TimeUnit.MILLISECONDS);
     this.setIntervalMs(interval);
 

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterHttpServer.java

@@ -60,17 +60,17 @@ protected void serviceInit(Configuration configuration) throws Exception {
 
     // Get HTTP address
     this.httpAddress = conf.getSocketAddr(
-        DFSConfigKeys.DFS_ROUTER_HTTP_BIND_HOST_KEY,
+        RBFConfigKeys.DFS_ROUTER_HTTP_BIND_HOST_KEY,
-        DFSConfigKeys.DFS_ROUTER_HTTP_ADDRESS_KEY,
+        RBFConfigKeys.DFS_ROUTER_HTTP_ADDRESS_KEY,
-        DFSConfigKeys.DFS_ROUTER_HTTP_ADDRESS_DEFAULT,
+        RBFConfigKeys.DFS_ROUTER_HTTP_ADDRESS_DEFAULT,
-        DFSConfigKeys.DFS_ROUTER_HTTP_PORT_DEFAULT);
+        RBFConfigKeys.DFS_ROUTER_HTTP_PORT_DEFAULT);
 
     // Get HTTPs address
     this.httpsAddress = conf.getSocketAddr(
-        DFSConfigKeys.DFS_ROUTER_HTTPS_BIND_HOST_KEY,
+        RBFConfigKeys.DFS_ROUTER_HTTPS_BIND_HOST_KEY,
-        DFSConfigKeys.DFS_ROUTER_HTTPS_ADDRESS_KEY,
+        RBFConfigKeys.DFS_ROUTER_HTTPS_ADDRESS_KEY,
-        DFSConfigKeys.DFS_ROUTER_HTTPS_ADDRESS_DEFAULT,
+        RBFConfigKeys.DFS_ROUTER_HTTPS_ADDRESS_DEFAULT,
-        DFSConfigKeys.DFS_ROUTER_HTTPS_PORT_DEFAULT);
+        RBFConfigKeys.DFS_ROUTER_HTTPS_PORT_DEFAULT);
 
     super.serviceInit(conf);
   }

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterQuotaUpdateService.java

@@ -26,7 +26,6 @@
 
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.QuotaUsage;
-import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.protocol.HdfsConstants;
 import org.apache.hadoop.hdfs.server.federation.store.MountTableStore;
 import org.apache.hadoop.hdfs.server.federation.store.protocol.GetMountTableEntriesRequest;
@@ -66,8 +65,8 @@ public RouterQuotaUpdateService(final Router router) throws IOException {
   @Override
   protected void serviceInit(Configuration conf) throws Exception {
     this.setIntervalMs(conf.getTimeDuration(
-        DFSConfigKeys.DFS_ROUTER_QUOTA_CACHE_UPATE_INTERVAL,
+        RBFConfigKeys.DFS_ROUTER_QUOTA_CACHE_UPATE_INTERVAL,
-        DFSConfigKeys.DFS_ROUTER_QUOTA_CACHE_UPATE_INTERVAL_DEFAULT,
+        RBFConfigKeys.DFS_ROUTER_QUOTA_CACHE_UPATE_INTERVAL_DEFAULT,
         TimeUnit.MILLISECONDS));
 
     super.serviceInit(conf);

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterRpcClient.java

@@ -46,7 +46,6 @@
 import java.util.regex.Pattern;
 
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.NameNodeProxiesClient.ProxyAndInfo;
 import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys;
 import org.apache.hadoop.hdfs.protocol.ClientProtocol;
@@ -126,8 +125,8 @@ public RouterRpcClient(Configuration conf, String identifier,
     this.connectionManager.start();
 
     int numThreads = conf.getInt(
-        DFSConfigKeys.DFS_ROUTER_CLIENT_THREADS_SIZE,
+        RBFConfigKeys.DFS_ROUTER_CLIENT_THREADS_SIZE,
-        DFSConfigKeys.DFS_ROUTER_CLIENT_THREADS_SIZE_DEFAULT);
+        RBFConfigKeys.DFS_ROUTER_CLIENT_THREADS_SIZE_DEFAULT);
     ThreadFactory threadFactory = new ThreadFactoryBuilder()
         .setNameFormat("RPC Router Client-%d")
         .build();
@@ -140,8 +139,8 @@ public RouterRpcClient(Configuration conf, String identifier,
         HdfsClientConfigKeys.Failover.MAX_ATTEMPTS_KEY,
         HdfsClientConfigKeys.Failover.MAX_ATTEMPTS_DEFAULT);
     int maxRetryAttempts = conf.getInt(
-        DFSConfigKeys.DFS_ROUTER_CLIENT_MAX_ATTEMPTS,
+        RBFConfigKeys.DFS_ROUTER_CLIENT_MAX_ATTEMPTS,
-        DFSConfigKeys.DFS_ROUTER_CLIENT_MAX_ATTEMPTS_DEFAULT);
+        RBFConfigKeys.DFS_ROUTER_CLIENT_MAX_ATTEMPTS_DEFAULT);
     int failoverSleepBaseMillis = conf.getInt(
         HdfsClientConfigKeys.Failover.SLEEPTIME_BASE_KEY,
         HdfsClientConfigKeys.Failover.SLEEPTIME_BASE_DEFAULT);

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterRpcServer.java

@@ -17,14 +17,14 @@
  */
 package org.apache.hadoop.hdfs.server.federation.router;
 
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_ROUTER_HANDLER_COUNT_DEFAULT;
+import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_HANDLER_COUNT_DEFAULT;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_ROUTER_HANDLER_COUNT_KEY;
+import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_HANDLER_COUNT_KEY;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_ROUTER_HANDLER_QUEUE_SIZE_DEFAULT;
+import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_HANDLER_QUEUE_SIZE_DEFAULT;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_ROUTER_HANDLER_QUEUE_SIZE_KEY;
+import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_HANDLER_QUEUE_SIZE_KEY;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_ROUTER_READER_COUNT_DEFAULT;
+import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_READER_COUNT_DEFAULT;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_ROUTER_READER_COUNT_KEY;
+import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_READER_COUNT_KEY;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_ROUTER_READER_QUEUE_SIZE_DEFAULT;
+import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_READER_QUEUE_SIZE_DEFAULT;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_ROUTER_READER_QUEUE_SIZE_KEY;
+import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_READER_QUEUE_SIZE_KEY;
 
 import java.io.FileNotFoundException;
 import java.io.IOException;
@@ -244,10 +244,10 @@ public RouterRpcServer(Configuration configuration, Router router,
         .newReflectiveBlockingService(clientProtocolServerTranslator);
 
     InetSocketAddress confRpcAddress = conf.getSocketAddr(
-        DFSConfigKeys.DFS_ROUTER_RPC_BIND_HOST_KEY,
+        RBFConfigKeys.DFS_ROUTER_RPC_BIND_HOST_KEY,
-        DFSConfigKeys.DFS_ROUTER_RPC_ADDRESS_KEY,
+        RBFConfigKeys.DFS_ROUTER_RPC_ADDRESS_KEY,
-        DFSConfigKeys.DFS_ROUTER_RPC_ADDRESS_DEFAULT,
+        RBFConfigKeys.DFS_ROUTER_RPC_ADDRESS_DEFAULT,
-        DFSConfigKeys.DFS_ROUTER_RPC_PORT_DEFAULT);
+        RBFConfigKeys.DFS_ROUTER_RPC_PORT_DEFAULT);
     LOG.info("RPC server binding to {} with {} handlers for Router {}",
         confRpcAddress, handlerCount, this.router.getRouterId());
 
@@ -280,8 +280,8 @@ public RouterRpcServer(Configuration configuration, Router router,
 
     // Create metrics monitor
     Class<? extends RouterRpcMonitor> rpcMonitorClass = this.conf.getClass(
-        DFSConfigKeys.DFS_ROUTER_METRICS_CLASS,
+        RBFConfigKeys.DFS_ROUTER_METRICS_CLASS,
-        DFSConfigKeys.DFS_ROUTER_METRICS_CLASS_DEFAULT,
+        RBFConfigKeys.DFS_ROUTER_METRICS_CLASS_DEFAULT,
         RouterRpcMonitor.class);
     this.rpcMonitor = ReflectionUtils.newInstance(rpcMonitorClass, conf);
 

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterSafemodeService.java

@@ -22,7 +22,6 @@
 import java.util.concurrent.TimeUnit;
 
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.server.federation.store.StateStoreService;
 import org.apache.hadoop.util.Time;
 import org.slf4j.Logger;
@@ -98,19 +97,19 @@ protected void serviceInit(Configuration conf) throws Exception {
 
     // Use same interval as cache update service
     this.setIntervalMs(conf.getTimeDuration(
-        DFSConfigKeys.DFS_ROUTER_CACHE_TIME_TO_LIVE_MS,
+        RBFConfigKeys.DFS_ROUTER_CACHE_TIME_TO_LIVE_MS,
-        DFSConfigKeys.DFS_ROUTER_CACHE_TIME_TO_LIVE_MS_DEFAULT,
+        RBFConfigKeys.DFS_ROUTER_CACHE_TIME_TO_LIVE_MS_DEFAULT,
         TimeUnit.MILLISECONDS));
 
     this.startupInterval = conf.getTimeDuration(
-        DFSConfigKeys.DFS_ROUTER_SAFEMODE_EXTENSION,
+        RBFConfigKeys.DFS_ROUTER_SAFEMODE_EXTENSION,
-        DFSConfigKeys.DFS_ROUTER_SAFEMODE_EXTENSION_DEFAULT,
+        RBFConfigKeys.DFS_ROUTER_SAFEMODE_EXTENSION_DEFAULT,
         TimeUnit.MILLISECONDS);
     LOG.info("Leave startup safe mode after {} ms", this.startupInterval);
 
     this.staleInterval = conf.getTimeDuration(
-        DFSConfigKeys.DFS_ROUTER_SAFEMODE_EXPIRATION,
+        RBFConfigKeys.DFS_ROUTER_SAFEMODE_EXPIRATION,
-        DFSConfigKeys.DFS_ROUTER_SAFEMODE_EXPIRATION_DEFAULT,
+        RBFConfigKeys.DFS_ROUTER_SAFEMODE_EXPIRATION_DEFAULT,
         TimeUnit.MILLISECONDS);
     LOG.info("Enter safe mode after {} ms without reaching the State Store",
         this.staleInterval);

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/StateStoreCacheUpdateService.java

@@ -20,8 +20,8 @@
 import java.util.concurrent.TimeUnit;
 
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.server.federation.router.PeriodicService;
+import org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -55,8 +55,8 @@ public StateStoreCacheUpdateService(StateStoreService stateStore) {
   protected void serviceInit(Configuration conf) throws Exception {
 
     this.setIntervalMs(conf.getTimeDuration(
-        DFSConfigKeys.DFS_ROUTER_CACHE_TIME_TO_LIVE_MS,
+        RBFConfigKeys.DFS_ROUTER_CACHE_TIME_TO_LIVE_MS,
-        DFSConfigKeys.DFS_ROUTER_CACHE_TIME_TO_LIVE_MS_DEFAULT,
+        RBFConfigKeys.DFS_ROUTER_CACHE_TIME_TO_LIVE_MS_DEFAULT,
         TimeUnit.MILLISECONDS));
 
     super.serviceInit(conf);

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/StateStoreConnectionMonitorService.java

@@ -18,8 +18,8 @@
 package org.apache.hadoop.hdfs.server.federation.store;
 
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.server.federation.router.PeriodicService;
+import org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -50,8 +50,8 @@ public StateStoreConnectionMonitorService(StateStoreService store) {
   @Override
   protected void serviceInit(Configuration conf) throws Exception {
     this.setIntervalMs(conf.getLong(
-        DFSConfigKeys.FEDERATION_STORE_CONNECTION_TEST_MS,
+        RBFConfigKeys.FEDERATION_STORE_CONNECTION_TEST_MS,
-        DFSConfigKeys.FEDERATION_STORE_CONNECTION_TEST_MS_DEFAULT));
+        RBFConfigKeys.FEDERATION_STORE_CONNECTION_TEST_MS_DEFAULT));
 
     super.serviceInit(conf);
   }

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/StateStoreService.java

@@ -33,9 +33,9 @@
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.server.federation.metrics.StateStoreMBean;
 import org.apache.hadoop.hdfs.server.federation.metrics.StateStoreMetrics;
+import org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys;
 import org.apache.hadoop.hdfs.server.federation.store.driver.StateStoreDriver;
 import org.apache.hadoop.hdfs.server.federation.store.impl.MembershipStoreImpl;
 import org.apache.hadoop.hdfs.server.federation.store.impl.MountTableStoreImpl;
@@ -139,8 +139,8 @@ protected void serviceInit(Configuration config) throws Exception {
 
     // Create implementation of State Store
     Class<? extends StateStoreDriver> driverClass = this.conf.getClass(
-        DFSConfigKeys.FEDERATION_STORE_DRIVER_CLASS,
+        RBFConfigKeys.FEDERATION_STORE_DRIVER_CLASS,
-        DFSConfigKeys.FEDERATION_STORE_DRIVER_CLASS_DEFAULT,
+        RBFConfigKeys.FEDERATION_STORE_DRIVER_CLASS_DEFAULT,
         StateStoreDriver.class);
     this.driver = ReflectionUtils.newInstance(driverClass, this.conf);
 
@@ -159,12 +159,12 @@ protected void serviceInit(Configuration config) throws Exception {
 
     // Set expirations intervals for each record
     MembershipState.setExpirationMs(conf.getLong(
-        DFSConfigKeys.FEDERATION_STORE_MEMBERSHIP_EXPIRATION_MS,
+        RBFConfigKeys.FEDERATION_STORE_MEMBERSHIP_EXPIRATION_MS,
-        DFSConfigKeys.FEDERATION_STORE_MEMBERSHIP_EXPIRATION_MS_DEFAULT));
+        RBFConfigKeys.FEDERATION_STORE_MEMBERSHIP_EXPIRATION_MS_DEFAULT));
 
     RouterState.setExpirationMs(conf.getTimeDuration(
-        DFSConfigKeys.FEDERATION_STORE_ROUTER_EXPIRATION_MS,
+        RBFConfigKeys.FEDERATION_STORE_ROUTER_EXPIRATION_MS,
-        DFSConfigKeys.FEDERATION_STORE_ROUTER_EXPIRATION_MS_DEFAULT,
+        RBFConfigKeys.FEDERATION_STORE_ROUTER_EXPIRATION_MS_DEFAULT,
         TimeUnit.MILLISECONDS));
 
     // Cache update service

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/driver/StateStoreSerializer.java

@@ -20,7 +20,7 @@
 import java.io.IOException;
 
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hdfs.DFSConfigKeys;
+import org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys;
 import org.apache.hadoop.hdfs.server.federation.store.records.BaseRecord;
 import org.apache.hadoop.util.ReflectionUtils;
 
@@ -61,8 +61,8 @@ public static StateStoreSerializer getSerializer(Configuration conf) {
 
   private static StateStoreSerializer newSerializer(final Configuration conf) {
     Class<? extends StateStoreSerializer> serializerName = conf.getClass(
-        DFSConfigKeys.FEDERATION_STORE_SERIALIZER_CLASS,
+        RBFConfigKeys.FEDERATION_STORE_SERIALIZER_CLASS,
-        DFSConfigKeys.FEDERATION_STORE_SERIALIZER_CLASS_DEFAULT,
+        RBFConfigKeys.FEDERATION_STORE_SERIALIZER_CLASS_DEFAULT,
         StateStoreSerializer.class);
     return ReflectionUtils.newInstance(serializerName, conf);
   }

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/driver/impl/StateStoreFileImpl.java

@@ -29,7 +29,7 @@
 import java.util.LinkedList;
 import java.util.List;
 
-import org.apache.hadoop.hdfs.DFSConfigKeys;
+import org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys;
 import org.apache.hadoop.hdfs.server.federation.store.records.BaseRecord;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -46,7 +46,7 @@ public class StateStoreFileImpl extends StateStoreFileBaseImpl {
 
   /** Configuration keys. */
   public static final String FEDERATION_STORE_FILE_DIRECTORY =
-      DFSConfigKeys.FEDERATION_STORE_PREFIX + "driver.file.directory";
+      RBFConfigKeys.FEDERATION_STORE_PREFIX + "driver.file.directory";
 
   /** Root directory for the state store. */
   private String rootDirectory;

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/driver/impl/StateStoreFileSystemImpl.java

@@ -33,7 +33,7 @@
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Options;
 import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.hdfs.DFSConfigKeys;
+import org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys;
 import org.apache.hadoop.hdfs.DistributedFileSystem;
 import org.apache.hadoop.hdfs.server.federation.store.records.BaseRecord;
 import org.slf4j.Logger;
@@ -51,7 +51,7 @@ public class StateStoreFileSystemImpl extends StateStoreFileBaseImpl {
 
   /** Configuration keys. */
   public static final String FEDERATION_STORE_FS_PATH =
-      DFSConfigKeys.FEDERATION_STORE_PREFIX + "driver.fs.path";
+      RBFConfigKeys.FEDERATION_STORE_PREFIX + "driver.fs.path";
 
   /** File system to back the State Store. */
   private FileSystem fs;

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/driver/impl/StateStoreZooKeeperImpl.java

@@ -29,7 +29,7 @@
 import org.apache.curator.framework.CuratorFramework;
 import org.apache.curator.framework.imps.CuratorFrameworkState;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hdfs.DFSConfigKeys;
+import org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys;
 import org.apache.hadoop.hdfs.server.federation.store.driver.StateStoreDriver;
 import org.apache.hadoop.hdfs.server.federation.store.records.BaseRecord;
 import org.apache.hadoop.hdfs.server.federation.store.records.Query;
@@ -58,7 +58,7 @@ public class StateStoreZooKeeperImpl extends StateStoreSerializableImpl {
 
   /** Configuration keys. */
   public static final String FEDERATION_STORE_ZK_DRIVER_PREFIX =
-      DFSConfigKeys.FEDERATION_STORE_PREFIX + "driver.zk.";
+      RBFConfigKeys.FEDERATION_STORE_PREFIX + "driver.zk.";
   public static final String FEDERATION_STORE_ZK_PARENT_PATH =
       FEDERATION_STORE_ZK_DRIVER_PREFIX + "parent-path";
   public static final String FEDERATION_STORE_ZK_PARENT_PATH_DEFAULT =