hadoop-common-project/hadoop-common/src/main/packages/templates/conf/core-site.xml

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
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<!-- Put site-specific property overrides in this file. -->

<configuration>

  <property>
    <name>local.realm</name>
    <value>${KERBEROS_REALM}</value>
  </property>

  <!-- file system properties -->

  <property>
    <name>fs.default.name</name>
    <value>hdfs://${HADOOP_NN_HOST}:8020</value>
    <description>The name of the default file system.  Either the
      literal string "local" or a host:port for NDFS.
    </description>
    <final>true</final>
  </property>

  <property>
    <name>fs.trash.interval</name>
    <value>360</value>
    <description>Number of minutes between trash checkpoints.
      If zero, the trash feature is disabled.
    </description>
  </property>
  
  <property>
    <name>hadoop.security.auth_to_local</name>
    <value>
	RULE:[2:$1@$0]([jt]t@.*${KERBEROS_REALM})s/.*/${HADOOP_MR_USER}/
        RULE:[2:$1@$0]([nd]n@.*${KERBEROS_REALM})s/.*/${HADOOP_HDFS_USER}/
        RULE:[2:$1@$0](mapred@.*${KERBEROS_REALM})s/.*/${HADOOP_MR_USER}/
        RULE:[2:$1@$0](hdfs@.*${KERBEROS_REALM})s/.*/${HADOOP_HDFS_USER}/
        RULE:[2:$1@$0](mapredqa@.*${KERBEROS_REALM})s/.*/${HADOOP_MR_USER}/
        RULE:[2:$1@$0](hdfsqa@.*${KERBEROS_REALM})s/.*/${HADOOP_HDFS_USER}/
        RULE:[2:$1@$0](hm@.*${KERBEROS_REALM})s/.*/${HBASE_USER}/
        RULE:[2:$1@$0](rs@.*${KERBEROS_REALM})s/.*/${HBASE_USER}/
        DEFAULT
    </value>
    <description></description>
  </property>

  <property>
    <name>hadoop.security.authentication</name>
    <value>${SECURITY_TYPE}</value>
    <description>
      Set the authentication for the cluster. Valid values are: simple or
      kerberos.
    </description>
  </property>

  <property>
    <name>hadoop.security.authorization</name>
    <value>${SECURITY}</value>
    <description>
      Enable authorization for different protocols.
    </description>
  </property>

  <property>
    <name>hadoop.security.groups.cache.secs</name>
    <value>14400</value>
  </property>

  <property>
    <name>hadoop.kerberos.kinit.command</name>
    <value>${KINIT}</value>
  </property>

  <property>
    <name>hadoop.http.filter.initializers</name>
    <value>org.apache.hadoop.http.lib.StaticUserWebFilter</value>
  </property>

</configuration>