relocating.

playbooks/roles/elasticsearch/templates/edx/etc/elasticsearch/elasticsearch.yml.j2

+# {{ ansible_managed }}
+
+
+# Path to directory where to store index data allocated for this node.
+#
+path.data: {{elasticsearch_data_dir}}
+
+# Path to log files:
+#
+path.logs: {{elasticsearch_log_dir}}
+
+# ElasticSearch performs poorly when JVM starts swapping: you should ensure that
+# it _never_ swaps.
+#
+# Set this property to true to lock the memory:
+#
+bootstrap.mlockall: true
+
+# Unicast discovery allows to explicitly control which nodes will be used
+# to discover the cluster. It can be used when multicast is not present,
+# or to restrict the cluster communication-wise.
+#
+# 1. Disable multicast discovery (enabled by default):
+#
+# discovery.zen.ping.multicast.enabled: false
+#
+# 2. Configure an initial list of master nodes in the cluster
+#    to perform discovery when new nodes (master or data) are started:
+#
+# discovery.zen.ping.unicast.hosts: ["host1", "host2:port", "host3[portX-portY]"]
+{%- if ELASTICSEARCH_CLUSTERED -%}
+  {%- set hosts= [] -%}
+
+  {%- for host in hostvars.keys() -%}
+    {% do hosts.append(host) %}
+  {%- endfor %}
+
+discovery.zen.ping.unicast.hosts: ['{{hosts|join("\',\'") }}']
+
+{% endif -%}
\ No newline at end of file