diff --git "a/tcp_tests/environment/environment_template/\173\043 roles \043\175/overrides" "b/tcp_tests/environment/environment_template/\173\043 roles \043\175/overrides"
new file mode 100644
index 0000000..ce3e4b1
--- /dev/null
+++ "b/tcp_tests/environment/environment_template/\173\043 roles \043\175/overrides"
@@ -0,0 +1,9 @@
+{#-
+parameters:
+  reclass:
+    storage:
+      node:
+        <reclass_storage_node_name>:
+          classes:
+#}
+          - environment.{{ cookiecutter._env_name }}.overrides
\ No newline at end of file
diff --git "a/tcp_tests/environment/environment_template/\173\173 cookiecutter._env_name \175\175/init.yml" "b/tcp_tests/environment/environment_template/\173\173 cookiecutter._env_name \175\175/init.yml"
index b2588b8..c1c1b12 100644
--- "a/tcp_tests/environment/environment_template/\173\173 cookiecutter._env_name \175\175/init.yml"
+++ "b/tcp_tests/environment/environment_template/\173\173 cookiecutter._env_name \175\175/init.yml"
@@ -12,8 +12,9 @@
         {# 'params' dict object is dynamically generated from 'roles' to add on the node #}
         {%- set params = {} %}
           classes:
-          {#- Default role linux_network_interface is added to each node #}
-          {%- for role in node.get('roles', []) + ['linux_network_interface'] %}
+          {#- Default roles are added to each node #}
+          {#- 'overrides' must be the very last role for each node #}
+          {%- for role in node.get('roles', []) + ['linux_network_interface', 'overrides'] %}
             {%- include ("{# roles #}/" + role) %}
           {%- endfor %}
 
diff --git "a/tcp_tests/environment/environment_template/\173\173 cookiecutter._env_name \175\175/overrides.yml" "b/tcp_tests/environment/environment_template/\173\173 cookiecutter._env_name \175\175/overrides.yml"
new file mode 100644
index 0000000..2c44db5
--- /dev/null
+++ "b/tcp_tests/environment/environment_template/\173\173 cookiecutter._env_name \175\175/overrides.yml"
@@ -0,0 +1,6 @@
+# Do not delete! This file is for global parameters overrides over all the nodes in the environment.
+# Example: salt-call reclass.cluster_meta_set foo bar
+parameters:
+  _param:
+    cluster_public_protocol: http
+    neutron_public_protocol: http