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Hello.
Is there a way to tell if the AL1 base is used in our saved images?
You may be able to identify it by checking "/etc/system-release" or by the AMI name of the EC2 instance.
If EC2 is managed by Systems Manager, you can check the version using Systems Manager inventory.
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/amazon-linux-ami-basics.html
https://docs.aws.amazon.com/systems-manager/latest/userguide/systems-manager-inventory.html
Secondly is creating a new server and building images off that for our environment the only way to get through this?
Yes, you need to start a new EC2 and migrate.
https://aws.amazon.com/amazon-linux-2/faqs/?nc1=h_ls
Q. Can I perform an in-place upgrade from an existing version of Amazon Linux AMI to Amazon Linux 2?
No, an in-place upgrade from the existing Amazon Linux image to Amazon Linux 2 is not supported. We recommend that you test your application on a fresh installation of Amazon Linux 2 first before migrating.
Q. Can I perform a rolling upgrade on instances running Amazon Linux AMI to Amazon Linux 2?
No, your instances running Amazon Linux will not be upgraded to Amazon Linux 2 with rolling upgrade mechanisms. Therefore, there is no disruption to your existing applications. Refer to Amazon Linux documentation and migration tooling for more details.
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