#!/usr/bin/env python

import sys,boto,os,time
from boto.s3.key import Key
import time
from datetime import date,timedelta
from settings import *

ZIPFILE = os.path.join("/tmp/",str(date.today())+".tar.bz2")

# print percent complete
def percent_cb(complete, total):
    sys.stdout.write('.')
    sys.stdout.flush()

# fileupload
def upload(filename):
    
    print '-> Uploading %s...' % filename
    
    count =0
    while True:
        try:            
            conn = boto.connect_s3(AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY)
            bucket = conn.get_bucket(AWS_STORAGE_BUCKET_NAME)
            k = Key(bucket)
            k.key = os.path.basename(filename)
            k.set_contents_from_filename(filename,cb=percent_cb, num_cb=10)
            return True
        except:
            print sys.exc_info()
            time.sleep(30)
            count+=1
            
            if count>=10:
                break
    
    return False

def make():
    print "-> Backup BD..."
    print "-> Compress..."
    os.system("tar cvjf %s /etc/ /var/www/ /root/scripts/ /var/webapps/ --exclude=\"nod32-update\" --exclude=\"fermasa\"" % ZIPFILE)

def clean_old():
    print "-> Cleaning old backup..."
    yesterday = date.today() - timedelta(1)
    
    # one backup per week 
    if (yesterday.isoweekday()%7) == 0:
        return
    
    count =0
    while True:
        try:
            conn = boto.connect_s3(AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY)
            bucket = conn.get_bucket(AWS_STORAGE_BUCKET_NAME)
            bucket.delete_key(str(yesterday)+".tar.bz2")
            break
        except:
            print sys.exc_info()
            time.sleep(30)
            count+=1
            
            if count>=10:
                break

def clean():
    os.system("rm -vf %s" % ZIPFILE)

def main():
    try:
        make()
        if (upload(ZIPFILE)): clean_old()
        clean()
    except KeyboardInterrupt:
        os.system("rm -vf %s" % ZIPFILE)


if __name__ == "__main__":
    main()

A script to make auto-backups to Amazon S3 using boto library

Amazon S3 backup

Python