moved to 3.2.1/stable hadoop version

datanode/Dockerfile

@@ -4,7 +4,7 @@ MAINTAINER Ivan Ermilov <ivan.s.ermilov@gmail.com>
 
 HEALTHCHECK CMD curl -f http://localhost:9864/ || exit 1
 
-ENV HDFS_CONF_dfs_datanode_data_dir=file:///hadoop/dfs/data
+ENV HDFS_CONF_dfs_datanode_data_dir=/hadoop/dfs/data
 RUN mkdir -p /hadoop/dfs/data
 VOLUME /hadoop/dfs/data
 

datanode/run.sh

@@ -6,4 +6,4 @@ if [ ! -d $datadir ]; then
   exit 2
 fi
 
-$HADOOP_PREFIX/bin/hdfs --config $HADOOP_CONF_DIR datanode
+$HADOOP_HOME/bin/hdfs --config $HADOOP_CONF_DIR datanode