Create snapshot of Amazon RDS by Python

gistfile1.py

# -*- coding: utf-8 -*-

import datetime
from boto import rds

#設定
AccessKey = '****'
AccessSecret = '****'
DbinstanceId = '****'
Region = 'ap-northeast-1'
SnapshotFormat = '%(name)s-%(date)s'
Generation = 3

#スナップショット名
today = datetime.date.today()
snapshot_id = SnapshotFormat % {
  'name': DbinstanceId, 'date': today.strftime('%Y%m%d')}

try:
  
  #接続
  conn = rds.connect_to_region(Region,
    aws_access_key_id=AccessKey, aws_secret_access_key=AccessSecret)
  
  print 'connected.'
  
  #スナップショットを作成
  try:
    conn.create_dbsnapshot(snapshot_id, DbinstanceId)
    print 'created new snapshot.'
  except Exception, e:
    if 'DBSnapshotAlreadyExists' != e.code:
      raise
    print 'snapshot already exists.'
  
  #古いスナップショットを取得
  oldday = datetime.date.today() - datetime.timedelta(days=Generation)
  old_snapshot_id = SnapshotFormat % {
    'name': DbinstanceId, 'date': oldday.strftime('%Y%m%d')}
  
  try:
    old_snapshot = conn.get_all_dbsnapshots(snapshot_id=old_snapshot_id)
    #古いスナップショットを削除
    if old_snapshot:
      conn.delete_dbsnapshot(old_snapshot)
      print 'deleted old snapshot.'
  except Exception, e:
    if 'DBSnapshotNotFound' != e.code:
      raise
  
  print 'finish.'
  
except Exception, e:
  print e