postgres: allow for disabling frequently snapshots

postgres/defaults/main.yml

+---
+
+postgres_enable_frequently: True

postgres/tasks/main.yml

 ---
-# file: roles/postgres/tasks/main.yml
 
 - name: ensure postgres packages are installed
-  apt: name={{ item }} state=latest
+  apt:
+    name: "{{ item }}"
+    state: present
   with_items:
     - postgresql
     - python-psycopg2
     - python3-psycopg2
     - libpq-dev
   tags:
-    - packages
     - postgres
 
 - name: ensure postgres is started
-  service: name=postgresql state=started enabled=yes
+  service:
+    name: postgresql
+    state: started
+    enabled: yes
   tags:
-    - service
     - postgres
 
 - name: ensure we have rsnapshot
-  apt: name=rsnapshot state=latest
+  apt:
+    name: rsnapshot
+    state: present
   tags:
-    - packages
     - postgres
     - rsnapshot
     - backup
 
 - name: ensure we have our postgres backup script
-  copy: src=pgbackup.sh dest=/usr/local/bin/ owner=root group=root mode=0755
+  copy:
+    src: pgbackup.sh
+    dest: /usr/local/bin/
+    owner: root
+    group: root
+    mode: 0755
   tags:
     - postgres
     - rsnapshot
     - backup
 
 - name: ensure we have our rsnapshot config
-  copy: src=rsnapshot.conf dest=/etc/ owner=root group=root mode=0644
+  template:
+    src: rsnapshot.conf.j2
+    dest: /etc/
+    owner: root
+    group: root
+    mode: 0644
   tags:
     - postgres
     - rsnapshot
     - backup
-    - config
 
 - name: ensure rsnapshot is running regularly
-  copy: src=crontab dest=/etc/cron.d/postgres-snapshot owner=root group=root mode=0644
+  template:
+    src: crontab.j2
+    dest: /etc/cron.d/postgres-snapshot
+    owner: root
+    group: root
+    mode: 0644
   tags:
     - postgres
     - rsnapshot
     - backup
-    - cron
-    - config

postgres/files/crontab → postgres/templates/crontab.j2

+{% if postgres_enable_frequently %}
 5,20,35,50 * * * * root /usr/bin/rsnapshot frequently
+{% endif %}
 3 * * * * root /usr/bin/rsnapshot hourly
 51 23 * * * root /usr/bin/rsnapshot daily
 41 23 * * 6 root /usr/bin/rsnapshot weekly

postgres/files/rsnapshot.conf → postgres/templates/rsnapshot.conf.j2

@@ -90,7 +90,9 @@ cmd_logger	/usr/bin/logger
 # e.g. alpha, beta, gamma, etc.         #
 #########################################
 
+{% if postgres_enable_frequently %}
 retain	frequently	4
+{% endif %}
 retain	hourly	6
 retain	daily	7
 retain	weekly	4