servicediscovery compatability issue with localstack

[codefromthecrypt]

Acknowledgements

• I have searched (https://github.com/aws/aws-sdk/issues?q=is%3Aissue) for past instances of this issue
• I have verified all of my SDK modules are up-to-date (you can perform a bulk update with go get -u github.com/aws/aws-sdk-go-v2/...)

Describe the bug

DiscoverInstances prefixes "data-" to the hostname, rendering localhost (specifically localstack) tests useless, as the hostname "data-localhost" doesn't exist.

Expected Behavior

I would like to use all servicediscovery functions. I'm not sure why others work and DiscoverInstances specifically does this

Current Behavior

I end up with an error like this:

2024-03-14T12:39:51.350703Z	error	unable to refresh Cloud Map cache due to error, using existing cache: error retrieving instance list from Cloud Map for "1" in "testns": operation error ServiceDiscovery: DiscoverInstances, https response error StatusCode: 0, RequestID: , request send failed, Post "http://data-localhost:32957/": dial tcp: lookup data-localhost: no such host

Reproduction Steps

localstack requires an authenticated docker image (localstack-pro) to run, so probably reproduction won't help as much, but the command that fails looks like this:

	instOutput, err := client.DiscoverInstances(ctx, &servicediscovery.DiscoverInstancesInput{ServiceName: svc.Name, NamespaceName: ns.Name})
	if err != nil {
		return nil, errors.Wrapf(err, "error retrieving instance list from Cloud Map for %q in %q", *svc.Name, *ns.Name)
	}

Possible Solution

maybe there is a way to avoid this part of the stack. I don't mind a workaround for testing.

Additional Information/Context

where the prefix happens: https://github.com/aws/aws-sdk-go-v2/blob/main/service/servicediscovery/api_op_DiscoverInstances.go#L193

AWS Go SDK V2 Module Versions Used

	github.com/aws/aws-sdk-go-v2 v1.25.3
	github.com/aws/aws-sdk-go-v2/config v1.27.7
	github.com/aws/aws-sdk-go-v2/credentials v1.17.7
	github.com/aws/aws-sdk-go-v2/service/servicediscovery v1.29.2

Compiler and Version used

go version go1.22.1 darwin/arm64

Operating System and version

macOS 14.4