Add possibility to manage file permissions of config files

Fixes-bug: PROD-36556
Change-Id: I223410209d15e5232bdf85c5b1634a5e00401c71
diff --git a/README.rst b/README.rst
index 04e79ed..d2fef75 100644
--- a/README.rst
+++ b/README.rst
@@ -178,6 +178,40 @@
             project_alarm_quota: 10
             alarm_max_actions: -1
 
+
+Change files/directories permissions for aodh service:
+=======================================
+In order to change file permissions the following should be set:
+
+'files' - block to set permissions for files.
+- full path to file
+- user ( default value is 'root' ) this parameter is optional.
+- group ( default value is 'aodh' ) this parameter is optional
+- mode ( default value is '0640' ) this parameter is optional
+
+'directories' - block to set permissions for directories.
+- full path to directory
+- user ( default value is 'root' ) this parameter is optional
+- group ( default value is 'aodh' ) this parameter is optional
+- mode ( default value is '0750' ) this parameter is optional
+
+.. code-block:: yaml
+
+    aodh:
+      files:
+        /etc/aodh/aodh.conf:
+          user: 'root'
+          group: 'aodh'
+          mode: '0750'
+      directories:
+        /etc/aodh:
+          user: 'root'
+          group: 'aodh'
+          mode: '0750'
+
+
+
+
 Development and testing
 =======================