Query about AWS Auto Upgrade from Aurora serverless V1 to V2 after 31st March, 2025 ?

After March 31, 2025, AWS plans to automatically upgrade Aurora Serverless v1 clusters to Aurora Serverless v2 if customers have not already done so. This process will begin on or after April 7, 2025, and will occur during scheduled cluster maintenance windows.

The exact upgrade process will involve the following steps:

1. AWS will attempt to upgrade your Aurora Serverless v1 cluster directly to Aurora Serverless v2.

2. If the direct upgrade is not possible (for example, if the current engine version is not supported by Aurora Serverless v2), AWS will first upgrade the cluster to a compatible engine version.

3. In case of any upgrade failures, AWS will convert the Serverless v1 cluster to a provisioned cluster with an equivalent engine version.

Regarding downtime, AWS has not provided specific details about the duration. However, it's important to note that this automatic upgrade process will likely cause some interruption to your database services. The exact downtime will depend on factors such as the size of your database, the complexity of the upgrade, and whether any version changes are required.

To minimize potential disruptions, AWS strongly recommends that customers proactively upgrade their Aurora Serverless v1 clusters to v2 before the end-of-life date. This allows for better control over the upgrade process, including the ability to test thoroughly and choose a suitable time for the migration.

If you want to ensure minimal downtime, it's advisable to plan and execute the upgrade yourself using AWS-recommended procedures, which involve creating a blue/green deployment for a seamless transition. This approach allows you to test the new environment before switching over, potentially reducing the impact on your applications.

Sources
[Announcement] Support for Aurora Serverless v1 ending soon | AWS re:Post
Upgrade from Amazon Aurora Serverless v1 to v2 with minimal downtime | AWS Database Blog