使用AWS Lambda自动定时快照EBS卷
一、创建IAM策略IAM->策略->创建策略->JSON
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"logs:*"
],
"Resource": "*"
},
{
"Effect": "Allow",
"Action": "ec2:Describe*",
"Resource": "*"
},
{
"Effect": "Allow",
"Action": [
"ec2:CreateSnapshot",
"ec2:DeleteSnapshot",
"ec2:CreateTags",
"ec2:ModifySnapshotAttribute",
"ec2:ResetSnapshotAttribute"
],
"Resource": [
"*"
]
}
]
} 二、创建角色
IAM->角色->创建角色->添加刚刚创建好的策略
https://s1.运维网.com/images/20180716/1531722535365365.png
三、添加标签
给每个正在运行的EC2实例都添加一个标签，值为自定义的实例名，后面python脚本会通过AWS API获取到这个值。https://s1.运维网.com/images/20180716/1531723598557758.png
四、编辑Python3脚本，脚本名为“lambda_function.py”
import boto3
import datetime
import os
import pytz
ec2 = boto3.resource('ec2')
def lambda_handler(event, context):
print("\n\nAWS snapshot backups starting at %s" % datetime.datetime.now())
instances = ec2.instances.filter(
Filters=[{'Name': 'instance-state-name', 'Values': ['running']}])
for instance in instances:
for item in instance.tags:
if item["Key"] == "Name":
instance_name = item["Value"]
for volume in ec2.volumes.filter(Filters=[{'Name': 'attachment.instance-id', 'Values': }]):
description = '%s-%s-%s' % (instance_name, volume.volume_id,
datetime.datetime.now().strftime("%Y%m%d"))
# create ebs snaphost
if volume.create_snapshot(VolumeId=volume.volume_id, Description=description):
print("Snapshot created with description [%s]" % description)
# delete expired snapshot
for snapshot in volume.snapshots.all():
# expried datetime
retention_days = 7
if datetime.datetime.now().replace(tzinfo=None) - snapshot.start_time.replace(tzinfo=None) > datetime.timedelta(days=retention_days):
print("\t\tDeleting snapshot [%s - %s]" % ( snapshot.snapshot_id, snapshot.description ))
snapshot.delete()
print("\n\nAWS snapshot backups completed at %s" % datetime.datetime.now())
return True 五、打包python脚本以及需要的三方库(Python3)
# mkdir /tmp/lambda_tmp
# mv lambda_function.py /tmp/lambda_tmp/
# pip install pytz -t /tmp/lambda_tmp/
# pip install boto3 -t /tmp/lambda_tmp/
# cd /tmp/lambda_tmp
# zip -r9 ~/lambda_EBS.zip * 六、创建Lambda函数
Service->Lambda->创建函数
https://s1.运维网.com/images/20180716/1531722938420914.png
下一步，上传刚刚压缩好的zip包
https://s1.运维网.com/images/20180716/1531723016614883.png
下一步，添加CloudWatch触发器，定时一天运行一次
http://devopsideas.com/wp-content/uploads/2017/12/lambda-event-schedule.png
https://s1.运维网.com/images/20180716/1531723163904246.png
点击保存并测试，如果测试通过会返回True，点击Service->EC2->快照，你会发现已经在做EBS快照了。
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