core-site.xml.j2

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<!-- Put site-specific property overrides in this file. -->

<configuration>
<property>
<name>fs.default.name</name>
{% for i in groups['name_node'] %}
<value>hdfs://{{ i  }}:9001</value>
{% endfor %}
</property>
</configuration>