(aws_ecs_patterns): upgrading past 2.221.0 caused outage as target group was recreated #36149
Description
Describe the bug
Looks like the feature flag reference in #33253 did not work. When our application was upgraded past 2.221.0 a destructive change to the loadbalancer target group happened leading to a 2 minute outage during the deployment
Regression Issue
- Select this option if this issue appears to be a regression.
Last Known Working CDK Library Version
2.220.0
Expected Behavior
No destructive change to the target group
Current Behavior
When you upgrade from 2.222.0 to 2.221 with a private load balancer then the target group is renamed and an outage happens
Reproduction Steps
- Use a ecsPatterns.ApplicationLoadBalancedFargateService with cdk version 2.220.0 with a private load balancer
- Upgrade to 2.221.0
Expected
- no downtime during deployment
Actual
- destructive change, load balancer target group is recreated
Possible Solution
Only include "Private" in the name if the feature flag is turned on
Additional Information/Context
No response
AWS CDK Library version (aws-cdk-lib)
2.221.0
AWS CDK CLI version
2.1032.0
Node.js Version
22.21.1
OS
Windows
Language
TypeScript
Language Version
5.9.3
Other information
No response