[ADD]Volumes backup image with save plan

backups/base.yml

@@ -0,0 +1,7 @@
+version: '2'
+
+services:
+
+  rsyncvolumes:
+    build: ./rsyncvolumes
+    image: rsyncvolumes:base

backups/rsyncvolumes/Dockerfile

@@ -0,0 +1,18 @@
+FROM debian:jessie
+MAINTAINER Yaltik - Fabien Bourgeois <fabien@yaltik.com>
+
+ENV SOURCE /var/lib/docker/volumes
+ENV DEST /var/backups/
+
+RUN apt-get update && apt-get install --no-install-recommends -y \
+      cron gettext-base rsync python-minimal libpython-stdlib
+
+COPY crontab /etc/crontab
+RUN chmod 644 /etc/crontab
+
+WORKDIR /opt/backup
+COPY rsync.template .
+COPY plan.tpl.py .
+COPY launch.sh .
+
+CMD bash launch.sh

backups/rsyncvolumes/crontab

@@ -0,0 +1,4 @@
+# hourly backup
+# m h dom mon dow user	command
+0 *	* * *	root	/bin/bash /opt/backup/rsync.sh
+0 1	* * *	root	/bin/python /opt/backup/plan.py

backups/rsyncvolumes/launch.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+envsubst < /opt/backup/rsync.template > /opt/backup/rsync.sh
+envsubst < /opt/backup/plan.tpl.py > /opt/backup/plan.py
+cron -f

backups/rsyncvolumes/plan.tpl.py

@@ -0,0 +1,74 @@
+# -*- coding: utf-8 -*-
+
+from zipfile import ZipFile, ZIP_DEFLATED
+from datetime import datetime
+from os import walk, unlink
+from os.path import join as osjoin
+from glob import glob
+
+# Backup plan for Docker volumes
+# ::::::::::::::::::::::::::::::
+#
+# Keep :
+#
+# - all saves the last week
+# - one save per week the last month
+# - one save per month the last year
+
+# Volumes Backup
+# ==============
+
+dt = datetime.now()
+zipname = '{0}.zip'.format(dt.strftime('%Y-%m-%d_%H-%M-%S'))
+zippath = '${DEST}' + zipname
+
+# Zip files
+
+
+def zipdir(path, ziph):
+    # ziph is zipfile handle
+    for root, dirs, files in walk(path):
+        for file in files:
+            ziph.write(osjoin(root, file))
+
+f = ZipFile(zippath, 'w', ZIP_DEFLATED)
+zipdir('${SOURCE}', f)
+f.close()
+
+# Filter all obsolete save files
+# ==============================
+
+
+def notkeep(fname):
+    fname = fname.split('/')[-1]
+    ds = fname.split('_')
+    if len(ds) <= 1:
+        return False
+    ds = ds[0]
+    d = datetime.strptime(ds, '%Y-%m-%d')
+    delta = dt - d
+    if delta.days > 365:
+        return True
+    elif delta.days > 31:
+        # if (delta.days %% 30) != 0:
+        if (d.day != 1):
+            return True
+    elif delta.days > 7:
+        # if (delta.days %% 7) != 0:
+        if (d.weekday() != 0) and (d.day != 1):
+            return True
+    else:
+        return False
+
+# Filters zip files and keeps only legitimate ones
+# ================================================
+
+files = glob('${DEST}/*.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)

backups/rsyncvolumes/rsync.template

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+rsync -av ${SOURCE} ${DEST}