Add rsnapshot role

rsnapshot/defaults/main.yml

+---
+
+rsnapshot_enable_frequently: true

rsnapshot/files/list-rsnapshot-config-files.sh

+#!/bin/sh
+for file in /etc/rsnapshot.d/*.conf; do
+	echo "include_conf	$file"
+done

rsnapshot/tasks/main.yml

+---
+
+- name: install rsnapshot
+  apt:
+    name: rsnapshot
+    state: present
+
+- name: create drop-in directory for backup config
+  file:
+    path: /etc/rsnapshot.d
+    state: directory
+    owner: root
+    group: root
+    mode: '0755'
+
+- name: create script for rsnapshot's crazy include_conf to work
+  copy:
+    src: "list-rsnapshot-config-files.sh"
+    dest: "/usr/local/bin"
+    owner: root
+    group: root
+    mode: '0755'
+
+- name: configure rsnapshot
+  template:
+    src: rsnapshot.conf.j2
+    dest: /etc/rsnapshot.conf
+    owner: root
+    group: root
+    mode: '0644'
+
+- name: make rsnapshot run regularly
+  template:
+    src: crontab.j2
+    dest: /etc/cron.d/rsnapshot
+    owner: root
+    group: root
+    mode: '0644'

rsnapshot/templates/crontab.j2

+{% if rsnapshot_enable_frequently %}
+5,20,35,50 * * * * root /usr/bin/rsnapshot -c /etc/rsnapshot.conf frequently
+{% endif %}
+3 * * * * root /usr/bin/rsnapshot -c /etc/rsnapshot.conf hourly
+51 23 * * * root /usr/bin/rsnapshot -c /etc/rsnapshot.conf daily
+41 23 * * 6 root /usr/bin/rsnapshot -c /etc/rsnapshot.conf weekly
+31 23 2 * * root /usr/bin/rsnapshot -c /etc/rsnapshot.conf monthly

rsnapshot/templates/rsnapshot.conf.j2

+config_version	1.2
+snapshot_root	/var/backups
+
+include_conf	`/usr/local/bin/list-rsnapshot-config-files.sh`
+
+cmd_cp	/bin/cp
+cmd_rm	/bin/rm
+cmd_rsync	/usr/bin/rsync
+cmd_logger	/usr/bin/logger
+cmd_du	/usr/bin/du
+
+{% if rsnapshot_enable_frequently %}
+retain	frequently	4
+{% endif %}
+retain	hourly	6
+retain	daily	7
+retain	weekly	4
+retain	monthly	6
+
+verbose	2
+loglevel	4
+lockfile	/run/rsnapshot.pid