Use Memcached as the Django cache

roles/mailman/files/memcached.sysconfig

@@ -0,0 +1,5 @@
+PORT="11211"
+USER="memcached"
+MAXCONN="1024"
+CACHESIZE="256"
+OPTIONS=""

roles/mailman/handlers/main.yml

@@ -8,3 +8,5 @@
 - name: reload apache
   action: service name=httpd state=reloaded
 
+- name: restart memcached
+  action: service name=memcached state=restarted

roles/mailman/tasks/main.yml

@@ -27,6 +27,9 @@
 - name: allow Apache to remotely connect to Mailman
   seboolean: name=httpd_can_network_connect state=yes persistent=yes
 
+- name: allow Apache to remotely connect to Memcached
+  seboolean: name=httpd_can_network_memcache state=yes persistent=yes
+
 
 #
 # Packages
@@ -42,6 +45,8 @@
   - hyperkitty
   - hyperkitty-selinux
   - postorius
+  - memcached
+  - python-pylibmc
   - yum-plugin-post-transaction-actions
   - mailman3-fedmsg-plugin
   tags:
@@ -226,7 +231,16 @@
 - name: set the postfix conffile
   copy: src=postfix-main.cf dest=/etc/postfix/main.cf
   notify:
-    - restart postfix
+  - restart postfix
 
 - name: create the postfix aliases
   command: mailman3 aliases
+
+# Memcached
+- name: set the memcached sysconfig file
+  copy: src=memcached.sysconfig dest=/etc/sysconfig/memcached
+  notify:
+  - restart memcached
+
+- name: start memcached
+  service: state=started enabled=yes name=memcached

roles/mailman/templates/settings.py.j2

@@ -299,6 +299,16 @@ LOGGING = {
     },
 }
 
+
+# Cache: use the local memcached server
+CACHES = {
+    'default': {
+        'BACKEND': 'django.core.cache.backends.memcached.PyLibMCCache',
+        'LOCATION': '127.0.0.1:11211',
+    }
+}
+
+
 #
 # HyperKitty-specific
 #