feat: new option to set heap size

CHANGELOG.md

@@ -5,6 +5,10 @@ Which is based on [Keep A Changelog](http://keepachangelog.com/)
 
 ## [Unreleased]
 
+### Added
+
+- new option to set heap size
+
 ## v1.0.0 - 2019-09-05
 
 ### Added

README.md

@@ -12,6 +12,7 @@ Install and configure Elasticsearch
 
 ## Role variables
 
+* `elasticsearch_heap_size` - set the heap size (default: `1g`)
 * `elasticsearch_config` - hash with the configuration (see [elasticsearch documentation](https://www.elastic.co/guide/en/elasticsearch/reference/current/settings.html))
 
 ```

defaults/main.yml

@@ -1,4 +1,5 @@
 ---
+elasticsearch_heap_size: 1g
 elasticsearch_config: {}
 elasticsearch_default_config:
   path.data: /var/lib/elasticsearch

tasks/main.yml

@@ -28,6 +28,17 @@
   until: result is succeeded
   tags: elasticsearch
 
+- name: set heap size
+  lineinfile:
+    path: /etc/elasticsearch/jvm.options
+    regexp: '^-{{ item }}'
+    line: '-{{ item }}{{ elasticsearch_heap_size }}'
+  loop:
+    - Xms
+    - Xmx
+  notify: restart elasticsearch
+  tags: elasticsearch
+
 - name: copy config file
   copy:
     content: '{{ elasticsearch_full_config|to_yaml }}'

test/integration/default/default.yml

@@ -2,6 +2,7 @@
 - hosts: localhost
   connection: local
   vars:
+    elasticsearch_heap_size: 512m
 
   roles:
     - ansible-role-elasticsearch

test/integration/default/serverspec/default_spec.rb

@@ -29,3 +29,7 @@ end
 describe port(9200) do
   it { should be_listening }
 end
+
+describe command('ps faux | grep elasticsearch') do
+  its(:stdout) { should contain('-Xms512m -Xmx512m') }
+end