aws Lambda函数自动备份snapshots

注意：虽然可以使用lambda自动备份快照，但是现在推荐使用Lifecycle Policy，设置比较方便，也不需要部署脚本，只需要在卷创建时添加一个backup标签即可。
代码如下：
import boto3
import time

def lambda_handler(event, context):
ec2 = boto3.client(‘ec2’, region_name=‘eu-central-1’)

# Get all in-use volumes in the region
result = ec2.describe_volumes( Filters=[{'Name': 'status', 'Values': ['in-use']}])

for volume in result['Volumes']:
    for i in volume['Tags']:
        if i["Key"] == "Name":
            if 'prd' in i['Value'] or 'prod' in i['Value']:
            # if 'prd' in volume['Tags'][0]['Value'] or 'prod' in volume['Tags'][0]['Value']:
                # Create snapshot
                print "Backing up %s in %s" % (volume['VolumeId'], volume['AvailabilityZone'])
                time.sleep(3)
                action = ec2.create_snapshot(VolumeId=volume['VolumeId'],Description='(Frankfurt time zone) Created by Lambda backup function')
    
                # Get snapshot resource
                ec2resource = boto3.resource('ec2', region_name='eu-central-1')
                snapshot = ec2resource.Snapshot(action['SnapshotId'])
    
                volumename = 'N/A'
                when = time.strftime("%Y%m%d-%H%M")
    
                # Find name tag for volume if it exists
                if 'Tags' in volume:
                    for tags in volume['Tags']:
                        if tags["Key"] == 'Name':
                            volumename = tags["Value"]
                # Add volume name to snapshot for easier identification
                snapshot.create_tags(Tags=[{'Key': 'Name','Value': volumename}])
                snapshot.create_tags(Tags=[{'Key': 'Date','Value': when}])