fix(roles/graylog_datanode): extend datanode configuration options to allow __raw configs

Author: ebuerki-lf

roles/graylog_datanode/README.md

@@ -78,6 +78,12 @@ graylog_datanode__password_secret: 'Linuxfabrik_GmbH'
 * Type: String.
 * Default: `'mongodb://127.0.0.1/graylog'`
 
+`graylog_datanode__node_search_cache_size`
+
+* Cache size for searchable snaphots. This space will be automatically reserved if `graylog_datanode__path_repo` is configured. See [docs.opensearch.org - Supported Units](https://docs.opensearch.org/latest/api-reference/units/) for a list of possible options. 
+* Type: String
+* Default: `10gb`
+
 `graylog_datanode__opensearch_data_location`
 
 * Set this OpenSearch folder if you need OpenSearch to be located in a special place.
@@ -96,6 +102,11 @@ graylog_datanode__password_secret: 'Linuxfabrik_GmbH'
 * Type: List of Strings
 * Default: `[]`
 
+`graylog_datanode__raw`
+* Multiline string. Raw content which will be appended to the `datanode.conf` config file.
+* Type: String
+* Default: unset
+
 `graylog_datanode__service_enabled`
 
 * Enables or disables the graylog-datanode service, analogous to `systemctl enable/disable --now`.

roles/graylog_datanode/templates/etc/graylog/datanode/6.1-datanode.conf.j2

@@ -168,3 +168,8 @@ opensearch_heap = {{ graylog_datanode__opensearch_heap }}
 
 node_search_cache_size = {{ graylog_datanode__node_search_cache_size }}
 path_repo = {{ graylog_datanode__path_repo | join(',') }}
+
+{% if graylog_datanode__raw is defined and graylog_datanode__raw | length %}
+#### Raw ####
+{{ graylog_datanode__raw }}
+{% endif %}

roles/graylog_datanode/templates/etc/graylog/datanode/6.2-datanode.conf.j2

@@ -168,3 +168,8 @@ opensearch_heap = {{ graylog_datanode__opensearch_heap }}
 
 node_search_cache_size = {{ graylog_datanode__node_search_cache_size }}
 path_repo = {{ graylog_datanode__path_repo | join(',') }}
+
+{% if graylog_datanode__raw is defined and graylog_datanode__raw | length %}
+#### Raw ####
+{{ graylog_datanode__raw }}
+{% endif %}

roles/graylog_datanode/templates/etc/graylog/datanode/6.3-datanode.conf.j2

@@ -168,3 +168,8 @@ opensearch_heap = {{ graylog_datanode__opensearch_heap }}
 
 node_search_cache_size = {{ graylog_datanode__node_search_cache_size }}
 path_repo = {{ graylog_datanode__path_repo | join(',') }}
+
+{% if graylog_datanode__raw is defined and graylog_datanode__raw | length %}
+#### Raw ####
+{{ graylog_datanode__raw }}
+{% endif %}

roles/graylog_datanode/templates/etc/graylog/datanode/7.0-datanode.conf.j2

@@ -168,3 +168,8 @@ opensearch_heap = {{ graylog_datanode__opensearch_heap }}
 
 node_search_cache_size = {{ graylog_datanode__node_search_cache_size }}
 path_repo = {{ graylog_datanode__path_repo | join(',') }}
+
+{% if graylog_datanode__raw is defined and graylog_datanode__raw | length %}
+#### Raw ####
+{{ graylog_datanode__raw }}
+{% endif %}