When using Cloudera Manager I can access to the hdfs-site.xml file via :
Cloudera Manager > Cluster > HDFS > Instances > (NameNode, for example)> Processes
COnfiguration Files > hdfs-site.xml
Then the URL points to :
http://quickstart.cloudera:7180/cmf/process/8/config?filename=hdfs-site.xml
Is this file accessible directly via the file system and if yes, where is it located