roles/elasticsearch: Add Elasticsearch deployment

The *elasticsearch* role installs Elasticsearch from the Elastic.co Yum
repository and manages basic node configuration.

roles/elasticsearch/tasks/main.yml

@@ -0,0 +1,41 @@
+- name: ensure java is installed
+  package:
+    name=java-1.8.0-openjdk-headless
+    state=present
+  tags:
+  - install
+
+- name: ensure elasticsearch package repository is available
+  template:
+    src=elasticsearch.repo.j2
+    dest=/etc/yum.repos.d/elasticsearch.repo
+    mode=0644
+  tags:
+  - install
+
+- name: Ensure elasticsearch is installed
+  package:
+    name: 'elasticsearch'
+    state: present
+  tags:
+  - install
+
+- name: ensure elasticsearch logging is configured
+  template:
+    src=log4j2.properties.j2
+    dest=/etc/elasticsearch/log4j2.properties
+    mode=0640
+    owner=root
+    group=elasticsearch
+
+- name: ensure elasticsearch jvm options are set
+  template:
+    src=jvm.options.j2
+    dest=/etc/elasticsearch/jvm.options
+    mode=0644
+  notify: restart elasticsearch
+
+- name: ensure elasticsearch server starts at boot
+  service:
+    name=elasticsearch
+    enabled=yes