postfix: add memcached support for postscreen

postfix/tasks/main.yml

@@ -6,6 +6,7 @@
     - postfix
     - postfix-pcre
     - postfix-cdb
+    - memcached
   tags: 
     - postfix
     - mail
@@ -24,9 +25,10 @@
     - mail
 
 - name: ensure templated config is present
-  template: src=templates/{{ item }} dest=/etc/postfix/main.cf
+  template: src=templates/{{ item }}.j2 dest=/etc/postfix/{{ item }}
   with_items:
-    - main.cf.j2
+    - main.cf
+    - postscreen_cache
   notify: 
     - restart postfix
   tags:

postfix/templates/main.cf.j2

@@ -115,3 +115,5 @@ postscreen_bare_newline_enable = yes
 # default: postscreen_bare_newline_action = ignore
 postscreen_bare_newline_action = drop
 #
+postscreen_cache_map = memcache:/etc/postfix/postscreen_cache
+proxy_write_maps = proxy:btree:/var/lib/postfix/postscreen_cache 

postfix/templates/postscreen_cache.j2

+# Django : 2014-11-07 postscreen-cache Konfigurationsdatei
+# #
+#
+
+{% for partner in groups['mail'] %}
+  {% if partner != ansible_hostname %}
+memcache = inet::{{hostvars[partner]["tinc_vpnip"]}}11211
+  {% endif %}
+{% endfor %}
+
+backup = proxy:btree:/var/lib/postfix/postscreen_cache
+key_format = postscreen:%s