added backup support

defaults/main.yml

@@ -1,4 +1,7 @@
 postgresql:
+  backup:
+    enable: True
+    keep_days: 3
   allowed_hosts: {}
   dbs: {}
   users: {}

tasks/backup.yml

@@ -0,0 +1,21 @@
+- name: add postgresql backup folder
+  file:
+    path: /opt/postgresbackup/
+    state: directory
+    owner: postgres
+    group: postgres
+    mode: '750'
+
+- name: add backup cronjob for easier backup/restore
+  cron:
+    name: db backup
+    job: '/usr/bin/pg_dumpall | gzip > /opt/postgresbackup/$(date "+\%Y\%m\%d-\%H\%M.sql.gz")'
+    user: postgres
+    hour: "*/4"
+    minute: 45
+
+- name: add backup cleanup cronjob
+  cron:
+    name: db backup cleanup
+    job: 'find /opt/postgresbackup/* -mtime +{{ postgresql.backup.keep_days }} -type f -exec rm {} \;'
+    special_time: daily

tasks/main.yml

@@ -38,27 +38,9 @@
     hour: 23
     minute: 26
 
-- name: add postgresql backup folder
+- include_tasks: backup.yml
-  file:
+  when:
-    path: /opt/postgresbackup/
+  - postgresql.backup.enable
-    state: directory
-    owner: postgres
-    group: postgres
-    mode: '750'
-
-- name: add backup cronjob for easier backup/restore
-  cron:
-    name: db backup
-    job: '/usr/bin/pg_dumpall | gzip > /opt/postgresbackup/$(date "+\%Y\%m\%d-\%H\%M.sql.gz")'
-    user: postgres
-    hour: "*/4"
-    minute: 45
-
-- name: add backup cleanup cronjob
-  cron:
-    name: db backup cleanup
-    job: 'find /opt/postgresbackup/* -mtime +3 -type f -exec rm {} \;'
-    special_time: daily
 
 - name: flush handlers so postgres is ready before other roles try to use it
   meta: flush_handlers