列出今天创建的自动RDS快照,并使用boto3复制到其他区域

问题描述 投票:0回答:1

我们正在其他地区构建自动DR冷站点,目前正在检索今天创建的RDS自动快照列表,并将它们传递给另一个函数以将它们复制到另一个AWS区域。

问题在于RDS boto3客户端,它返回了一种独特的日期格式,使得创建日期的过滤更加困难。

today = (datetime.today()).date()
rds_client = boto3.client('rds')
snapshots = rds_client.describe_db_snapshots(SnapshotType='automated')

harini = "datetime("+ today.strftime('%Y,%m,%d') + ")"
print harini

print snapshots

for i in snapshots['DBSnapshots']:

  if i['SnapshotCreateTime'].date() == harini:
      print(i['DBSnapshotIdentifier'])
      print (today)

尽管已将日期“harini”转换为“SnapshotCreateTime”格式:datetime(2015,1,1),但Lambda函数仍无法列出快照。

amazon-web-services aws-lambda amazon-rds boto3
1个回答
1
投票

更好的方法是通过使用云监视事件调用lambda函数来复制文件。

请参阅分步说明:https://geektopia.tech/post.php?blogpost=Automating_The_Cross_Region_Copy_Of_RDS_Snapshots

或者,您可以为每个快照发布副本,而不管日期如何。客户端将引发异常,您可以像这样捕获它

# Written By GeekTopia
#
# Copy All Snapshots for an RDS Instance To a new region
# --Free to use under all conditions
# --Script is provied as is. No Warranty, Express or Implied

import json
import boto3
from botocore.exceptions import ClientError
import time
destinationRegion = "us-east-1"
sourceRegion = 'us-west-2'
rdsInstanceName = 'needbackups'

def lambda_handler(event, context):
    #We need two clients
    # rdsDestinationClient -- Used to start the copy processes. All cross region 
copies must be started from the destination and reference the source
    # rdsSourceClient      -- Used to list the snapshots that need to be copied. 

    rdsDestinationClient = boto3.client('rds',region_name=destinationRegion)
    rdsSourceClient=boto3.client('rds',region_name=sourceRegion)

    #List All Automated for A Single Instance 

    snapshots = rdsSourceClient.describe_db_snapshots(DBInstanceIdentifier=rdsInstanceName,SnapshotType='automated')

    for snapshot in snapshots['DBSnapshots']:
        #Check the the snapshot is NOT in the process of being created
        if snapshot['Status'] == 'available':

            #Get the Source Snapshot ARN. - Always use the ARN when copying snapshots across region
            sourceSnapshotARN = snapshot['DBSnapshotArn']

            #build a new snapshot name
            sourceSnapshotIdentifer = snapshot['DBSnapshotIdentifier']
            targetSnapshotIdentifer ="{0}-ManualCopy".format(sourceSnapshotIdentifer)
            targetSnapshotIdentifer = targetSnapshotIdentifer.replace(":","-")

            #Adding a delay to stop from reaching the api rate limit when there are large amount of snapshots -
            #This should never occur in this use-case, but may if the script is modified to copy more than one instance. 
            time.sleep(.2)            

            #Execute copy
            try:
                copy = rdsDestinationClient.copy_db_snapshot(SourceDBSnapshotIdentifier=sourceSnapshotARN,TargetDBSnapshotIdentifier=targetSnapshotIdentifer,SourceRegion=sourceRegion)
                print("Started Copy of Snapshot {0} in {2} to {1} in {3} ".format(sourceSnapshotIdentifer,targetSnapshotIdentifer,sourceRegion,destinationRegion))    
            except ClientError as ex:
                if ex.response['Error']['Code'] == 'DBSnapshotAlreadyExists':
                    print("Snapshot  {0} already exist".format(targetSnapshotIdentifer))
                else:
                    print("ERROR: {0}".format(ex.response['Error']['Code']))

    return {
        'statusCode': 200,
        'body': json.dumps('Opearation Complete')
    }
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