Disable elasticsearch discovery by default.

Fixes #165.

README.md

@@ -85,6 +85,15 @@ graylog_http_external_uri: "http://{{ ansible_default_ipv4.address }}:9000/"
 
 Take a look into `defaults/main.yml` to get an overview of all configuration parameters.
 
+If you need to configure a graylog setting that we haven't set up, you can use `graylog_additional_config` to declare it:
+
+```yaml
+graylog_additional_config:
+  elasticsearch_discovery_default_user: my_username
+  elasticsearch_discovery_default_password: "{{ my_password }}"
+```
+
+
 More detailed example
 ---------------------
 

defaults/main.yml

@@ -56,7 +56,7 @@ graylog_elasticsearch_disable_version_check:            True
 graylog_elasticsearch_http_enabled:                     False
 graylog_disable_index_optimization:                     True
 graylog_index_optimization_max_num_segments:            1
-graylog_elasticsearch_discovery_enabled:                True
+graylog_elasticsearch_discovery_enabled:                False
 graylog_elasticsearch_discovery_frequency:              "30s"
 graylog_elasticsearch_discovery_filter:                 ""
 graylog_elasticsearch_max_total_connections:            20