add query_range, query_scheduler and custom configs

query_range and query_scheduler for the sake of
grafana/loki#4613

'custom_config' is for all future sections which may be added
and aren't available at the moment of publishing this role

defaults/main.yml

@@ -76,6 +76,11 @@ loki_table_manager_config:
   retention_deletes_enabled: false
   retention_period: 0s
 loki_ruler_config: {}
+loki_query_scheduler: {}
+loki_query_range: {}
+
+# catch-all config option to be added "verbatim" to loki.yml
+loki_custom_config: {}
 
 promtail_client_config:
   - url: "http://{{ loki_listen_address }}:{{ loki_listen_port }}/loki/api/v1/push"

templates/loki.yml.j2

@@ -61,3 +61,14 @@ runtime_config:
 ruler:
   {{ loki_ruler_config | to_nice_yaml(indent=2) | indent(2, False) }}
 {% endif %}
+{% if loki_query_scheduler %}
+query_scheduler:
+  {{ loki_query_scheduler | to_nice_yaml(indent=2) | indent(2, False) }}
+{% endif %}
+{% if loki_query_range %}
+query_range:
+  {{ loki_query_range | to_nice_yaml(indent=2) | indent(2, False) }}
+{% endif %}
+{% if loki_custom_config %}
+{{ loki_custom_config | to_nice_yaml(indent=2) }}
+{% endif %}