common: set journald retention time to 7days

roles/common/handlers/main.yml

@@ -1,4 +1,7 @@
 ---
 
+- name: Restart journald
+  service: name=systemd-journald state=restarted
+
 - name: update-initramfs
   command: update-initramfs -u -k all

roles/common/tasks/Debian.yml

@@ -55,3 +55,11 @@
     path: /etc/pam.d/su
     regexp: '^.*auth\s+required\s+pam_wheel.so$'
     line: 'auth       required   pam_wheel.so'
+
+- name: Configure journald retention
+  lineinfile:
+    path: "/etc/systemd/journald.conf"
+    state: "present"
+    regexp: "^#?MaxRetentionSec=.*"
+    line: "MaxRetentionSec=7day"
+  notify: Restart journald