Upgrading Elasticsearch to 6.x

roles/elasticsearch/defaults/main.yml

@@ -8,6 +8,6 @@ elasticsearch_home: /usr/share/elasticsearch
 
 elasticsearch_max_open_files: 65536
 elasticsearch_max_map_count: 262144
-elasticsearch_max_threads: 2048
+elasticsearch_max_threads: 4096
 
 elasticsearch_service_name: elasticsearch

roles/elasticsearch/files/elasticsearch.repo

-[elasticsearch-5.x]
-name=Elasticsearch repository for 5.x packages
-baseurl=https://artifacts.elastic.co/packages/5.x/yum
+[elasticsearch-6.x]
+name=Elasticsearch repository for 6.x packages
+baseurl=https://artifacts.elastic.co/packages/6.x/yum
 gpgcheck=1
 gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch
 enabled=1
 autorefresh=1
-type=rpm-md
+type=rpm-md
\ No newline at end of file

roles/elasticsearch/tasks/main.yml

@@ -37,26 +37,33 @@
               line='vm.max_map_count={{ elasticsearch_max_map_count }}'
 
 # Configure elasticsearch
-- name: Configuring elasticsearch
+- name: Configuring elasticsearch (http.cors.enabled)
   lineinfile: "dest=/etc/elasticsearch/elasticsearch.yml insertafter=EOF 
               regexp='http.cors.enabled.*' 
               line='http.cors.enabled: true'"
   notify: 
     - restart elasticsearch
     
-- name: Configuring elasticsearch
+- name: Configuring elasticsearch (network.publish_host)
   lineinfile: "dest=/etc/elasticsearch/elasticsearch.yml insertafter='^#network.publish_host'
               regexp='^network.publish_host.*' 
               line='network.publish_host: {{ ansible_eth1.ipv4.address }}'"
   notify: 
     - restart elasticsearch
     
-- name: Configuring elasticsearch
+- name: Configuring elasticsearch (bootstrap.system_call_filter)
   lineinfile: "dest=/etc/elasticsearch/elasticsearch.yml insertafter=EOF
               regexp='^bootstrap.system_call_filter.*' 
               line='bootstrap.system_call_filter: false'"
   notify: 
     - restart elasticsearch
+    
+- name: Configuring elasticsearch (network.host)
+  lineinfile: "dest=/etc/elasticsearch/elasticsearch.yml insertafter=EOF 
+              regexp='network.host.*' 
+              line='network.host: _site_'"
+  notify: 
+    - restart elasticsearch
               
 - name: make sure elasticsearch is started
   service: name="{{ elasticsearch_service_name }}" state="started"