Adding support for GCE discovery

tasks/gce.yml

@@ -0,0 +1,25 @@
+---
+# Install GCE Plugin (see https://github.com/elasticsearch/elasticsearch-cloud-gce)
+#
+# The following variables need to be defined in your playbook or inventory:
+# - elasticsearch_plugin_gce_version
+#
+# The following variables provide a for now limited configuration for the plugin.
+# More options may be available in the future.
+# (see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/modules-discovery-ec2.html):
+
+# - elasticsearch_plugin_gce_project_id
+# - elasticsearch_plugin_gce_region
+
+
+- name: Installing GCE Plugin
+  action: >
+    shell bin/plugin install elasticsearch/elasticsearch-cloud-gce/{{ elasticsearch_plugin_gce_version }}
+    chdir={{ elasticsearch_home_dir }}
+
+# Fix permissions
+- file: >
+    path="{{ elasticsearch_plugin_dir }}" state=directory
+    owner={{ elasticsearch_user }} group={{ elasticsearch_group }}
+    recurse=yes
+

tasks/main.yml

@@ -94,6 +94,10 @@
 - include: aws.yml
   when: (elasticsearch_plugin_aws_version is defined)
 
+# Install GCE Plugin
+- include: gce.yml
+  when: (elasticsearch_plugin_gce_version is defined)
+
 # Install Other Generic Plugins
 - include: plugins.yml
   when: (elasticsearch_plugins is defined)

templates/elasticsearch.yml.j2

@@ -385,6 +385,18 @@ indices.recovery.concurrent_streams: {{ elasticsearch_recovery_concurrent_stream
 
 ################################## Discovery ##################################
 
+{% if elasticsearch_plugin_gce_is defined %}
+
+discovery.type: gce
+{% if elasticsearch_plugin_gce_project_id defined %}
+cloud.gce.project_id: '{{ elasticsearch_plugin_gce_project_id }}'
+{% endif %}
+{% if elasticsearch_plugin_gce_region defined %}
+cloud.gce.zone: '{{ elasticsearch_plugin_gce_region }}'
+{% endif %}
+
+{% endif %}
+
 {% if elasticsearch_plugin_aws_version is defined %}
 
 discovery.type: ec2