Compatibility considerations for Tanzu Operations Manager and Elastic Application runtime when Upgrading AWS RDS instance

Products

• VMware Tanzu Application Service

Issue/Introduction

  At the time of writing this KB AWS RDS using MYSQL engine 8.0 will reach end of standard Support  on July 31 2026.  This KB will help answer frequently ask questions related to RDS upgrades and compatibility with Tanzu Foundation Core ( Also known as Tanzu Operations manger) and Elastic Application Runtime ( also known as Tanzu Platform Application Service )

 

Refer to AWS RDS instance version dates page for end of support information.

Resolution

Is there a compatibility matrix for Operations Manager or Elastic Application Runtime with AWS RDS external database?

We do not maintain or publish a compatibility matrix for AWS RDS instances.  While we do test with MySQL external databases internally we do not test all variants from each individual cloud provider. We do expect the selected MySQL provider will be compliant and compatible with Operations Manager and Elastic Application Runtime. Should a compatibility issue surface we will tree it as a bug and address accordingly

 

Are there any known compatibility issues with AWS RDS with MYSQL engine 8.4?

We have manually tested this version internally along with a migration from 8.0 to 8.4 and there are no known compatibility issues

 

Will there be downtime when migrating the AWS RDS instance from one version to the next?

Yes there will be some degree of downtime during the upgrade process.  The symptoms for each component are explained below

Bosh Director

The BOSH Director will return 500 errors and other API errors while the database instance is being upgraded.  Operations Manager will show status errors in the Director Tile status page.    These errors will self heal once the database upgrade is complete.

Elastic Application Runtime API Availability

Platform APIs may not be available during the procedure, see the specific details below.  These symptoms will self heal once the RDS instance completes its upgrade

UAA API

Users will not be able to log in during the migration.

CloudFoundry API

cf ssh, push, start, stop etc.. commands will not function while the database is down for upgrade.

CredHub API

It is unlikely that applications need access at runtime (after startup) to CredHub. Applications that depend on CredHub may be unable to restart during the migration. 

Autoscaling

Autoscaling is going to be paused  

Platform App Availability

Standard configurations of TAS should not experience any application downtime during the upgrade. Diego Cells and edge routers are not affected by the database upgrades and therefore, applications already running should remain running and routable. 
 

Apps Using UAA for SSO

Because implicit and auth code grants do not work without database access, users of SSO-based apps will not be able to create new sessions. This would likely cause these types of applications to experience downtime.