Enable mod_mam for Message Archive Management

roles/ejabberd/files/ejabberd-delete-old-mam-messages.service

@@ -0,0 +1,23 @@
+[Unit]
+Description=Deletion of MAM messages stored by ejabberd
+
+[Service]
+Type=oneshot
+ExecStart=/usr/sbin/ejabberdctl delete_old_mam_messages all 31
+
+User=ejabberd
+Group=ejabberd
+
+NoNewPrivileges=true
+PrivateDevices=true
+PrivateMounts=true
+PrivateTmp=true
+PrivateUsers=false
+ProtectClock=true
+ProtectControlGroups=true
+ProtectHome=true
+ProtectHostname=true
+ProtectKernelLogs=true
+ProtectKernelModules=true
+ProtectKernelTunables=true
+ProtectSystem=true

roles/ejabberd/files/ejabberd-delete-old-mam-messages.timer

@@ -0,0 +1,10 @@
+[Unit]
+Description=Run monthly deletion of MAM messages stored by ejabberd
+
+[Timer]
+OnCalendar=monthly
+RandomizedDelaySec=1h
+FixedRandomDelay=true
+
+[Install]
+WantedBy=timers.target

roles/ejabberd/tasks/main.yml

@@ -34,6 +34,29 @@
     state: started
     daemon_reload: true
 
+- name: Systemd service unit deleting old MAM messages
+  ansible.builtin.copy:
+    src: ejabberd-delete-old-mam-messages.service
+    dest: /etc/systemd/system/ejabberd-delete-old-mam-messages.service
+    owner: root
+    group: root
+    mode: 0644
+
+- name: Systemd timer for deleting old MAM messages
+  ansible.builtin.copy:
+    src: ejabberd-delete-old-mam-messages.timer
+    dest: /etc/systemd/system/ejabberd-delete-old-mam-messages.timer
+    owner: root
+    group: root
+    mode: 0644
+
+- name: Enable systemd timer for deleting old MAM messages
+  ansible.builtin.systemd:
+    name: ejabberd-delete-old-mam-messages.timer
+    enabled: true
+    state: started
+    daemon_reload: true
+
 - name: Create /etc/default/ejabberd
   ansible.builtin.template:
     src: ejabberd-default.j2

roles/ejabberd/templates/ejabberd.yml.j2

@@ -194,6 +194,8 @@ access_rules:
   ## Expected by the ipstamp module for XpartaMuPP
   ipbots:
     - allow: ipbots
+  mam_modify:
+    - deny
   muc_admin:
     - allow: admin
     - allow: muc_admins
@@ -283,7 +285,8 @@ modules:
   ## ipstamp module used by XpartaMuPP to insert IP addresses into the gamelist
   mod_ipstamp: {}
   mod_last: {}
-  ## mod_mam:
+  mod_mam:
+    access_preferences: mam_modify
   ##   ## Mnesia is limited to 2GB, better to use an SQL backend
   ##   ## For small servers SQLite is a good fit and is very easy
   ##   ## to configure. Uncomment this when you have SQL configured: