[ADD]Odoo backup image with integrated plan

odoo/backups/Dockerfile

@@ -15,6 +15,7 @@ RUN chmod 644 /etc/crontab
 RUN touch /var/log/cron.log
 
 COPY backup.template .
+COPY plan.py .
 COPY launch.sh .
 
 RUN chown -R odoo:odoo . && chown odoo:odoo /var/log/cron.log

odoo/backups/crontab

@@ -1,5 +1,6 @@
 # daily odoo backup
 # m h dom mon dow user	command
 0 2	* * *	odoo	/bin/bash /home/odoo/backup.sh >> /var/log/cron.log 2>&1
+10 2	* * *	odoo	/usr/bin/python /home/odoo/plan.py >> /var/log/cron.log 2>&1
 # empty line required at the end of this file for a valid cron file.
 

odoo/backups/plan.py

@@ -0,0 +1,53 @@
+# -*- coding: utf-8 -*-
+
+"""
+Backup plan for Odoo databases
+::::::::::::::::::::::::::::::
+
+Keep :
+
+- all saves the last week
+- one save per week the last month
+- one save per month the last year
+"""
+
+from datetime import datetime
+from os import unlink
+from glob import glob
+
+DT = datetime.now()
+
+def notkeep(fname):
+    """ Filter all obsolete save files """
+    fname = fname.split('/')[-1]
+    fname = fname.split('_')
+    if len(fname) <= 1:
+        return False
+    save_date = fname[0]
+    save_date = datetime.strptime(save_date, '%Y-%m-%d')
+    delta = DT - save_date
+    if delta.days > 365:
+        return True
+    elif delta.days > 31:
+        # if (delta.days %% 30) != 0:
+        if save_date.day != 1:
+            return True
+    elif delta.days > 7:
+        # if (delta.days %% 7) != 0:
+        if (save_date.weekday() != 0) and (save_date.day != 1):
+            return True
+    else:
+        return False
+
+# Filters zip files and keeps only legitimate ones
+# ================================================
+
+FILES = glob('backups/*.zip')
+BACKUPS_TO_REMOVE = filter(notkeep, FILES)
+
+if len(BACKUPS_TO_REMOVE) > 0:
+    print('Save files outdated, will be deleted : \n\n* ' +
+          '\n* '.join(BACKUPS_TO_REMOVE))
+
+for b in BACKUPS_TO_REMOVE:
+    unlink(b)