Give elasticsearch more heap memory.

* modules/logstash/files/elasticseach.default: Elasticsearch does not
handle running out of memory very gracefully. Recommended allocation is
half of the hosts memory. Give elasticsearch 4GB of the 8GB host.

* modules/logstash/manifests/elasticseach.pp: Copy new elasticsearch
defaults file into place on the host.

Change-Id: I9ed14148c901cd3fd4ec38333a722821adb77ff5
Reviewed-on: https://review.openstack.org/27870
Approved: Clark Boylan <clark.boylan@gmail.com>
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Tested-by: Jenkins

files/elasticsearch.default

@@ -0,0 +1,38 @@
+# Run ElasticSearch as this user ID and group ID
+#ES_USER=elasticsearch
+#ES_GROUP=elasticsearch
+
+# Heap Size (defaults to 256m min, 1g max)
+ES_HEAP_SIZE=4g
+
+# Heap new generation
+#ES_HEAP_NEWSIZE=
+
+# max direct memory
+#ES_DIRECT_SIZE=
+
+# Maximum number of open files, defaults to 65535.
+#MAX_OPEN_FILES=65535
+
+# Maximum locked memory size. Set to "unlimited" if you use the
+# bootstrap.mlockall option in elasticsearch.yml. You must also set
+# ES_HEAP_SIZE.
+#MAX_LOCKED_MEMORY=unlimited
+
+# ElasticSearch log directory
+#LOG_DIR=/var/log/elasticsearch
+
+# ElasticSearch data directory
+#DATA_DIR=/var/lib/elasticsearch
+
+# ElasticSearch work directory
+#WORK_DIR=/tmp/elasticsearch
+
+# ElasticSearch configuration directory
+#CONF_DIR=/etc/elasticsearch
+
+# ElasticSearch configuration file (elasticsearch.yml)
+#CONF_FILE=/etc/elasticsearch/elasticsearch.yml
+
+# Additional Java OPTS
+#ES_JAVA_OPTS=

manifests/elasticsearch.pp

@@ -47,9 +47,22 @@ class logstash::elasticsearch {
     require => Package['elasticsearch'],
   }
 
+  file { '/etc/default/elasticsearch':
+    ensure  => present,
+    source  => 'puppet:///modules/logstash/elasticsearch.default',
+    replace => true,
+    owner   => 'root',
+    group   => 'root',
+    mode    => '0644',
+    require => Package['elasticsearch'],
+  }
+
   service { 'elasticsearch':
     ensure    => running,
     require   => Package['elasticsearch'],
-    subscribe => File['/etc/elasticsearch/elasticsearch.yml'],
+    subscribe => [
+      File['/etc/elasticsearch/elasticsearch.yml'],
+      File['/etc/default/elasticsearch'],
+    ],
   }
 }