docker-distribution: make registry boxes compress gigantic messages files

Signed-off-by: Kevin Fenzi <kevin@scrye.com>

roles/docker-distribution/files/syslog-logrotate

@@ -0,0 +1,20 @@
+/var/log/cron
+/var/log/maillog
+/var/log/messages
+/var/log/secure
+/var/log/spooler
+{
+    sharedscripts
+    postrotate
+	/bin/kill -HUP `cat /var/run/syslogd.pid 2> /dev/null` 2> /dev/null || true
+    endscript
+    daily
+    rotate 7
+    missingok
+    ifempty
+    compress
+    compresscmd /usr/bin/xz
+    uncompresscmd /usr/bin/xz
+    compressext .xz
+    dateext
+}

roles/docker-distribution/tasks/main.yml

@@ -47,3 +47,9 @@
   tags:
   - docker-distribution
 
+- name: override the default syslog logrotate file
+  copy:
+    src=syslog-logrotate
+    dest=/etc/logrotate.d/syslog
+  tags:
+  - docker-distribution