HDFS-13248: Namenode needs to use the actual client IP when going through the
RBF proxy. There is a new configuration knob dfs.namenode.ip-proxy-users that configures the list of users than can set their client ip address using the client context. Fixes #4081
This commit is contained in:
Owen O'Malley
parent
c3a4ce8ee8
commit
1175acbb75
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@ -43,6 +43,11 @@ import static org.apache.hadoop.fs.CommonConfigurationKeysPublic.HADOOP_CALLER_C
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@InterfaceStability.Evolving
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public final class CallerContext {
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public static final Charset SIGNATURE_ENCODING = StandardCharsets.UTF_8;
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// field names
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public static final String CLIENT_IP_STR = "clientIp";
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public static final String CLIENT_PORT_STR = "clientPort";
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/** The caller context.
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*
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* It will be truncated if it exceeds the maximum allowed length in
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@ -1509,7 +1509,19 @@ public class UserGroupInformation {
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return null;
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}
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/**
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* If this is a proxy user, get the real user. Otherwise, return
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* this user.
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* @param user the user to check
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* @return the real user or self
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*/
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public static UserGroupInformation getRealUserOrSelf(UserGroupInformation user) {
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if (user == null) {
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return null;
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}
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UserGroupInformation real = user.getRealUser();
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return real != null ? real : user;
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}
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/**
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* This class is used for storing the groups for testing. It stores a local
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@ -545,8 +545,8 @@ public class RouterRpcClient {
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byte[] origSignature = ctx == null ? null : ctx.getSignature();
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CallerContext.Builder builder =
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new CallerContext.Builder("", contextFieldSeparator)
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.append(CLIENT_IP_STR, Server.getRemoteAddress())
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.append(CLIENT_PORT_STR,
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.append(CallerContext.CLIENT_IP_STR, Server.getRemoteAddress())
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.append(CallerContext.CLIENT_PORT_STR,
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Integer.toString(Server.getRemotePort()))
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.setSignature(origSignature);
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// Append the original caller context
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@ -362,6 +362,20 @@ With this setting a user can interact with `ns-fed` as a regular namespace:
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This federated namespace can also be set as the default one at **core-site.xml** using `fs.defaultFS`.
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NameNode configuration
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--------------------
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In order for the system to support data-locality, you must configure your NameNodes so that they will trust the routers to supply the user's client IP address. `dfs.namenode.ip-proxy-users` defines a comma separated list of users that are allowed to provide the client ip address via the caller context.
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```xml
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<configuration>
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<property>
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<name>dfs.namenode.ip-proxy-users</name>
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<value>hdfs</value>
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</property>
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</configuration>
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```
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Router configuration
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--------------------
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@ -938,6 +938,8 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
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"dfs.namenode.lifeline.handler.count";
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public static final String DFS_NAMENODE_SERVICE_HANDLER_COUNT_KEY = "dfs.namenode.service.handler.count";
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public static final int DFS_NAMENODE_SERVICE_HANDLER_COUNT_DEFAULT = 10;
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// List of users that can override their client ip
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public static final String DFS_NAMENODE_IP_PROXY_USERS = "dfs.namenode.ip-proxy-users";
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public static final String DFS_HTTP_POLICY_KEY = "dfs.http.policy";
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public static final String DFS_HTTP_POLICY_DEFAULT = HttpConfig.Policy.HTTP_ONLY.name();
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public static final String DFS_DATANODE_HTTPSERVER_FILTER_HANDLERS = "dfs.datanode.httpserver.filter.handlers";
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@ -387,7 +387,6 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
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@Metric final MutableRatesWithAggregation detailedLockHoldTimeMetrics =
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registry.newRatesWithAggregation("detailedLockHoldTimeMetrics");
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private static final String CLIENT_PORT_STR = "clientPort";
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private final String contextFieldSeparator;
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boolean isAuditEnabled() {
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@ -453,7 +452,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
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byte[] origSignature = ctx == null ? null : ctx.getSignature();
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CallerContext.setCurrent(
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new CallerContext.Builder(origContext, contextFieldSeparator)
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.append(CLIENT_PORT_STR, String.valueOf(Server.getRemotePort()))
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.append(CallerContext.CLIENT_PORT_STR, String.valueOf(Server.getRemotePort()))
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.setSignature(origSignature)
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.build());
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}
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@ -461,7 +460,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
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private boolean isClientPortInfoAbsent(CallerContext ctx){
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return ctx == null || ctx.getContext() == null
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|| !ctx.getContext().contains(CLIENT_PORT_STR);
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|| !ctx.getContext().contains(CallerContext.CLIENT_PORT_STR);
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}
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/**
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@ -21,6 +21,7 @@ import static org.apache.hadoop.fs.CommonConfigurationKeys.IPC_MAXIMUM_DATA_LENG
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import static org.apache.hadoop.fs.CommonConfigurationKeys.IPC_MAXIMUM_DATA_LENGTH_DEFAULT;
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import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_HANDLER_COUNT_DEFAULT;
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import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_HANDLER_COUNT_KEY;
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import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_IP_PROXY_USERS;
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import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_LIFELINE_HANDLER_COUNT_KEY;
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import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_LIFELINE_HANDLER_RATIO_DEFAULT;
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import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_LIFELINE_HANDLER_RATIO_KEY;
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@ -45,7 +46,9 @@ import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import org.apache.commons.lang3.ArrayUtils;
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import org.apache.hadoop.thirdparty.com.google.common.collect.Lists;
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import org.apache.hadoop.ipc.CallerContext;
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import org.apache.hadoop.HadoopIllegalArgumentException;
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import org.apache.hadoop.classification.InterfaceAudience;
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@ -267,6 +270,9 @@ public class NameNodeRpcServer implements NamenodeProtocols {
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private final String defaultECPolicyName;
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// Users who can override the client ip
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private final String[] ipProxyUsers;
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public NameNodeRpcServer(Configuration conf, NameNode nn)
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throws IOException {
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this.nn = nn;
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@ -277,6 +283,7 @@ public class NameNodeRpcServer implements NamenodeProtocols {
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int handlerCount =
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conf.getInt(DFS_NAMENODE_HANDLER_COUNT_KEY,
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DFS_NAMENODE_HANDLER_COUNT_DEFAULT);
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ipProxyUsers = conf.getStrings(DFS_NAMENODE_IP_PROXY_USERS);
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RPC.setProtocolEngine(conf, ClientNamenodeProtocolPB.class,
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ProtobufRpcEngine2.class);
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@ -1890,7 +1897,29 @@ public class NameNodeRpcServer implements NamenodeProtocols {
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}
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}
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private static String getClientMachine() {
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private String getClientMachine() {
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if (ipProxyUsers != null) {
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// Get the real user (or effective if it isn't a proxy user)
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UserGroupInformation user =
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UserGroupInformation.getRealUserOrSelf(Server.getRemoteUser());
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if (user != null &&
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ArrayUtils.contains(ipProxyUsers, user.getShortUserName())) {
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CallerContext context = CallerContext.getCurrent();
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if (context != null && context.isContextValid()) {
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String cc = context.getContext();
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// if the rpc has a caller context of "clientIp:1.2.3.4,CLI",
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// return "1.2.3.4" as the client machine.
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String key = CallerContext.CLIENT_IP_STR +
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CallerContext.Builder.KEY_VALUE_SEPARATOR;
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int posn = cc.indexOf(key);
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if (posn != -1) {
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posn += key.length();
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int end = cc.indexOf(",", posn);
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return end == -1 ? cc.substring(posn) : cc.substring(posn, end);
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}
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}
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}
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}
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String clientMachine = Server.getRemoteAddress();
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if (clientMachine == null) { //not a RPC client
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clientMachine = "";
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@ -544,6 +544,17 @@
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</description>
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</property>
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<property>
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<name>dfs.namenode.ip-proxy-users</name>
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<value></value>
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<description>A comma separated list of user names that are allowed by the
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NameNode to specify a different client IP address in the caller context.
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This is used by Router-Based Federation (RBF) to provide the actual client's
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IP address to the NameNode, which is critical to preserve data locality when
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using RBF. If you are using RBF, add the user that runs the routers.
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</description>
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</property>
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<property>
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<name>dfs.namenode.acls.enabled</name>
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<value>true</value>
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@ -1,4 +1,4 @@
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/**
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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@ -24,14 +24,25 @@
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*/
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package org.apache.hadoop.hdfs.server.namenode;
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import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_IP_PROXY_USERS;
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import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_RPC_BIND_HOST_KEY;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertNotEquals;
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import java.io.IOException;
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import java.nio.charset.StandardCharsets;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.fs.FSDataOutputStream;
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import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.hdfs.DFSTestUtil;
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import org.apache.hadoop.hdfs.DistributedFileSystem;
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import org.apache.hadoop.hdfs.HdfsConfiguration;
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import org.apache.hadoop.hdfs.MiniDFSCluster;
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import org.apache.hadoop.hdfs.protocol.LocatedBlocks;
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import org.apache.hadoop.ipc.CallerContext;
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import org.apache.hadoop.security.UserGroupInformation;
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import org.junit.Test;
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public class TestNameNodeRpcServer {
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@ -59,5 +70,88 @@ public class TestNameNodeRpcServer {
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conf.unset(DFS_NAMENODE_RPC_BIND_HOST_KEY);
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}
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}
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/**
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* Get the preferred DataNode location for the first block of the
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* given file.
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* @param fs The file system to use
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* @param p The path to use
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* @return the preferred host to get the data
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*/
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private static String getPreferredLocation(DistributedFileSystem fs,
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Path p) throws IOException{
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// Use getLocatedBlocks because it is the basis for HDFS open,
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// but provides visibility into which host will be used.
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LocatedBlocks blocks = fs.getClient()
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.getLocatedBlocks(p.toUri().getPath(), 0);
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return blocks.get(0).getLocations()[0].getHostName();
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}
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// Because of the randomness of the NN assigning DN, we run multiple
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// trials. 1/3^20=3e-10, so that should be good enough.
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static final int ITERATIONS_TO_USE = 20;
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/**
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* A test to make sure that if an authorized user adds "clientIp:" to their
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* caller context, it will be used to make locality decisions on the NN.
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*/
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@Test
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public void testNamenodeRpcClientIpProxy() throws IOException {
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Configuration conf = new HdfsConfiguration();
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conf.set(DFS_NAMENODE_IP_PROXY_USERS, "fake_joe");
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// Make 3 nodes & racks so that we have a decent shot of detecting when
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// our change overrides the random choice of datanode.
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final String[] racks = new String[]{"/rack1", "/rack2", "/rack3"};
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final String[] hosts = new String[]{"node1", "node2", "node3"};
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MiniDFSCluster cluster = null;
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final CallerContext original = CallerContext.getCurrent();
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try {
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cluster = new MiniDFSCluster.Builder(conf)
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.racks(racks).hosts(hosts).numDataNodes(hosts.length)
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.build();
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cluster.waitActive();
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DistributedFileSystem fs = cluster.getFileSystem();
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// Write a sample file
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final Path fooName = fs.makeQualified(new Path("/foo"));
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FSDataOutputStream stream = fs.create(fooName);
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stream.write("Hello world!\n".getBytes(StandardCharsets.UTF_8));
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stream.close();
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// Set the caller context to set the ip address
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CallerContext.setCurrent(
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new CallerContext.Builder("test", conf)
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.append(CallerContext.CLIENT_IP_STR, hosts[0])
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.build());
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// Should get a random mix of DataNodes since we aren't joe.
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for (int trial = 0; trial < ITERATIONS_TO_USE; ++trial) {
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String host = getPreferredLocation(fs, fooName);
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if (!hosts[0].equals(host)) {
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// found some other host, so things are good
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break;
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} else if (trial == ITERATIONS_TO_USE - 1) {
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assertNotEquals("Failed to get non-node1", hosts[0], host);
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}
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}
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// Run as fake joe to authorize the test
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UserGroupInformation joe =
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UserGroupInformation.createUserForTesting("fake_joe",
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new String[]{"fake_group"});
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DistributedFileSystem joeFs =
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(DistributedFileSystem) DFSTestUtil.getFileSystemAs(joe, conf);
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// As joe, we should get all node1.
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for (int trial = 0; trial < ITERATIONS_TO_USE; ++trial) {
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String host = getPreferredLocation(joeFs, fooName);
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assertEquals("Trial " + trial + " failed", hosts[0], host);
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}
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} finally {
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CallerContext.setCurrent(original);
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if (cluster != null) {
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cluster.shutdown();
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}
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// Reset the config
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conf.unset(DFS_NAMENODE_IP_PROXY_USERS);
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}
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}
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}
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