how to make dualstack work in amplify configuration or client code of amplify 2.x

[smediomike]

I want to set my S3 to support dualstack.

status:
Android can work with setS3ClientOption in AmazonS3Client from getEscapeHatch.

iOS do not find same android method to handle this.

based on https://docs.aws.amazon.com/sdkref/latest/guide/feature-endpoints.html; if add use_dualstack_endpoint into AmplifyConfiguration file, iOS client also can not work like below:

"storage":{
"plugins":{
"awsS3StoragePlugin":{
"bucket" :"greenbeehive",
"region":"ap-northest-1",
"use_dualstack_endpoint",true
}
}
}

SDK version: 2.26.1
Device: any iOS device

Questions:
How I make it workable in AmplifyConfiguration file or how to change configuration or others in code to make it workable?

Thank you very much!

[tyllark]

Hello @smediomike, I wanted to confirm that your intention is to configure the underlying Amplify Swift S3Client to use dualstack via the AmplifyConfiguration file or the AWS SDK escape hatch. If that is the case Amplify Swift is using aws-sdk-swift for it's S3Client and we can transfer this issue to the appropriate repository!

[smediomike]

hello @tyllark, I'm now using Amplify-Swift 2.26.1 in our iOS product (package dependencies). I want to know how I can support dual stack for S3 Storage in amplifyconfiguration.json or how to change source code? Thanks!

[tyllark]

Hello @smediomike, while aws-sdk-swift seems to have support for dual stacks, Amplify Swift does not set a value for S3ClientConfiguration.useDualStack. Additionally the S3Client cannot be reconfigured to set the useDualStack field, so the AWS SDK escape hatch cannot be used for that.

I will look into transferring this issue over to the Amplify Swift repository as a feature request to support configuring dualstack in S3. In the meantime you can consider using aws-sdk-swift for creating an S3Client with dualstack.