Use cluster hosts' FQDNs in their /etc/hosts file as well as the alias

Author: bluesmoon

apps/manual-kafka-cluster/roles/kafka/tasks/hostname.yml

@@ -8,7 +8,7 @@
     block: |
       #jinja2: trim_blocks:False
       {%- for count in range(cluster_size) %}
-      {{ kafka_data.server[count].instance.ip_priv1 }} {{ kafka_data.server[count].instance.hostname }}
+      {{ kafka_data.server[count].instance.ip_priv1 }} {{ kafka_data.server[count].instance.hostname }} {{ instance_prefix }}{{ count+1 }}
       {%- endfor %}
 
 - name: configure hostnames
@@ -19,4 +19,4 @@
   delegate_to: "{{ item }}"
   loop: "{{ groups['kafka'] }}"
   loop_control:
-    index_var: count
+    index_var: count