common: Raise journald max files limit and disable error wall

Max files limit causes journald to be too agressive when cleaning up
old logs because it tries to stay under the limit. If there are enough
users on the system that won't happen and it will start removing system
logs way too soon (like after a few hours or days).
Signed-off-by: Florian Pritz <bluewind@xinu.at>

roles/common/handlers/main.yml

@@ -3,3 +3,6 @@
 - name: restart networkd
   service: name=systemd-networkd state=restarted
 
+- name: restarted journald
+  service: name=systemd-journald state=restarted
+

roles/common/tasks/main.yml

@@ -35,6 +35,13 @@
   notify:
     - restart networkd
 
+- name: configure journald
+  template: src={{item}}.j2 dest=/etc/systemd/{{item}} owner=root group=root mode=644
+  with_items:
+    - journald.conf
+  notify:
+    - restarted journald
+
 - name: create zsh directory
   file: path=/root/.zsh state=directory owner=root group=root mode=0700
 

roles/common/templates/journald.conf.j2

+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+# Entries in this file show the compile time defaults.
+# You can change settings by editing this file.
+# Defaults can be restored by simply deleting this file.
+#
+# See journald.conf(5) for details.
+
+[Journal]
+#Storage=auto
+#Compress=yes
+#Seal=yes
+#SplitMode=uid
+#SyncIntervalSec=5m
+#RateLimitIntervalSec=30s
+#RateLimitBurst=1000
+#SystemMaxUse=
+#SystemKeepFree=
+#SystemMaxFileSize=
+SystemMaxFiles=2000
+#RuntimeMaxUse=
+#RuntimeKeepFree=
+#RuntimeMaxFileSize=
+#RuntimeMaxFiles=100
+#MaxRetentionSec=
+#MaxFileSec=1month
+#ForwardToSyslog=no
+#ForwardToKMsg=no
+#ForwardToConsole=no
+ForwardToWall=no
+#TTYPath=/dev/console
+#MaxLevelStore=debug
+#MaxLevelSyslog=debug
+#MaxLevelKMsg=notice
+#MaxLevelConsole=info
+#MaxLevelWall=emerg
+