利用AWS boto实现EC2 存储卷的自动快照

car.3205

　　boto是AWS的Python SDK,可以利用boto自动生成ec2的存储卷快照，实现ec2数据的备份
　　1.安装boot
　　 pip install boto ，如果没有安装pip,需要提前安装
　　

　　2.配置boto配置文件
　　  ~/.aws/credentials  #设置aws认证凭据
  [default]
aws_access_key_id = AAAAAAAAAAAAAAA
aws_secret_access_key = TNAAAAXXXXXXXXXXXXXXXXXXXXXX　　 ~/.aws/config #设置默认区域
[default]
region = us-east-1　　

　　3.编辑脚本
#Date:
#Author:
#Usage: python snap.py volume_id number_of_snapshots_to_keep
import boto
import sys
import pdb
from datetime import datetime
conn = boto.connect_ec2()
conn_us = conn
if len(sys.argv) < 2:
        print "Usage: snap.py vol-id days-to-keep"
        exit()
vol_id = sys.argv[1]
keep = int(sys.argv[2])
volumes = conn_us.get_all_volumes([vol_id])
volume = volumes[0]
description = 'hostname' + '-' + datetime.today().isoformat(' ')#镜像描述
volume.create_snapshot(description)
snapshots = volume.snapshots()
def date_compare(snap1, snap2):
    if snap1.start_time < snap2.start_time:
        return -1
    elif snap1.start_time == snap2.start_time:
        return 0
    return 1
snapshots.sort(date_compare)
delta = len(snapshots) - keep
for i in range(delta):
    print 'Deleting snapshot ' + snapshots.description
    try:
        snapshots.delete()
    except Exception, e:
        pass　　

　　4.加入crontab
　　volum-id可以在控制台中找到
　　#每天凌晨自动生成磁盘快照
　　00 00 * * * python /opt/scripts/snap.py vol-00c69ee40b3ad1bf4 10 #Disk snap