roles/common: Add task to copy tarsnaprc

One less thing to do manually after server provisioning, and there is
nothing sensitive in here anyways.

roles/common/files/tarsnaprc

@@ -0,0 +1,47 @@
+### Recommended options
+
+# Tarsnap cache directory
+cachedir /root/.tarsnap-cache
+
+# Tarsnap key file
+keyfile /root/.tarsnap.key
+
+# Don't archive files which have the nodump flag set
+nodump
+
+# Print statistics when creating or deleting archives
+print-stats
+
+# Create a checkpoint once per GB of uploaded data.
+checkpoint-bytes 1G
+
+### Other options, not applicable to most systems
+
+# Aggressive network behaviour: Use multiple TCP connections when
+# writing archives.  Use of this option is recommended only in
+# cases where TCP congestion control is known to be the limiting
+# factor in upload performance.
+#aggressive-networking
+
+# Exclude files and directories matching specified patterns
+#exclude
+
+# Include only files and directories matching specified patterns
+#include
+
+# Attempt to reduce tarsnap memory consumption.  This option
+# will slow down the process of creating archives, but may help
+# on systems where the average size of files being backed up is
+# less than 1 MB.
+#lowmem
+
+# Try even harder to reduce tarsnap memory consumption.  This can
+# significantly slow down tarsnap, but reduces its memory usage
+# by an additional factor of 2 beyond what the lowmem option does.
+#verylowmem
+
+# Snapshot time.  Use this option if you are backing up files
+# from a filesystem snapshot rather than from a "live" filesystem.
+#snaptime <file>
+
+humanize-numbers

roles/common/tasks/tarsnap.yml

@@ -9,4 +9,7 @@
 - name: Install tarsnap
   apt: pkg=tarsnap update_cache=yes
 
+- name: Copy tarsnaprc
+  copy: src=tarsnaprc dest=/root/.tarsnaprc owner=root group=root mode=0600
+
 # vim: set sw=2 ts=2: