Add env variable for the hadoop-namenode with default value of 127.0.0.1

Author: flangelier

Dockerfile

@@ -11,6 +11,7 @@ ENV HADOOP_COMMON_HOME $HADOOP_INSTALL
 ENV HADOOP_HDFS_HOME $HADOOP_INSTALL
 ENV HADOOP_COMMON_LIB_NATIVE_DIR $HADOOP_INSTALL/lib/native
 ENV YARN_HOME $HADOOP_INSTALL
+ENV HADOOP_NAMENODE 127.0.0.1
 
 # Installing HADOOP
 ADD http://archive.apache.org/dist/hadoop/core/hadoop-$HADOOP_VERSION/hadoop-$HADOOP_VERSION.tar.gz /

env/local/core-site.xml

@@ -19,6 +19,6 @@
 <configuration>
 	<property>
 		<name>fs.default.name</name>
-		<value>hdfs://192.168.0.19:9000</value>
+		<value>hdfs://$HADOOP_NAMENODE:9000</value>
 	</property>
 </configuration>