AWS SSL证书在过期前会自动续订，并且新证书将在旧证书过期前几天发出，所以在一定时间内会存在新旧证书共存的情况。

您可以使用以下代码示例来检查续订和过期时间是否有重叠：

import datetime import boto3

client = boto3.client('acm')

Get details of a certificate

cert_arn = 'arn:aws:acm:region:account-id:certificate/certificate-id' cert_details = client.describe_certificate(CertificateArn=cert_arn)

Get the time when the certificate was issued

issued_time = cert_details['Certificate']['CreatedAt'].replace(tzinfo=None)

Get the time when the certificate will expire

expiry_time = cert_details['Certificate']['NotAfter'].replace(tzinfo=None)

Get the time when the certificate will be renewed

renewal_time = expiry_time - datetime.timedelta(days=30)

Check if there is overlap between renewal and expiry time

if renewal_time >= issued_time and renewal_time <= expiry_time: print("There is overlap between renewal and expiry time") else: print("There is no overlap between renewal and expiry time")