Allow user defined variables in munin.conf

munin/files/munin.conf

@@ -33,3 +33,7 @@
     {{ print_directive(directive, value) }}
     {%- endfor %}
 {% endfor %}
+
+{%- if config.get('formula_append') %}
+{{ config.formula_append }}
+{% endif %}

pillar.example

@@ -19,6 +19,9 @@ munin_master:
     "localhost.localdomain":
       address: "127.0.0.1"
       use_node_name: "no"
+  # In case you need additional variables
+  formula_append |
+    some_variable value
 
 munin_node:
   log_level: 4