Merge pull request #9 from NETWAYS/feature-singlenode-8

Disable discovery on single node clusters

Author: widhalmt

roles/elasticsearch/templates/elasticsearch.yml.j2

@@ -2,9 +2,11 @@ node.name: "{{ ansible_hostname }}"
 path.data: {{ elasticsearch_datapath }}
 path.logs: /var/log/elasticsearch
 network.host: ["_local_","_site_"]
+{% if elastic_release < 8 or groups['elasticsearch'] | length > 1 %}
 discovery.seed_hosts: [ {% for host in groups['elasticsearch']  %}
 "{{ hostvars[host].ansible_default_ipv4.address | default(hostvars[host].ansible_all_ipv4_addresses[0]) }}"{% if not loop.last %},{% endif %}
 {% endfor %} ]
+{% endif %}
 cluster.initial_master_nodes: [ {% for host in groups['elasticsearch']  %}
 "{{ hostvars[host].ansible_hostname }}"{% if not loop.last %},{% endif %}
 {% endfor %} ]