S3 Module Source does not work with AWS SSO

[kevinprince]

Terraform Version

Terraform v1.10.5
on darwin_arm64

Terraform Configuration Files

"module": {
        "init": [
            {
                "environment": "${local.config.environment}",
                "name": "${local.config.name}",
                "source": "s3::https://bucket-name.s3.us-east-2.amazonaws.com/terraform/module.zip"
            }
        ]
    }

Debug Output

╷
│ Error: Failed to download module
│ 
│   on main.tf.json line 8, in module:
│    8:         "init": [
│ 
│ Could not download module "init" (main.tf.json:8) source code from "s3::https://the-bucket.s3.us-east-2.amazonaws.com/terraform/modules/truss-definitons.zip": NoCredentialProviders: no valid providers in chain
│ caused by: EnvAccessKeyNotFound: AWS_ACCESS_KEY_ID or AWS_ACCESS_KEY not found in environment
│ SharedCredsLoad: failed to load shared credentials file
│ caused by: FailedRead: unable to open file
│ caused by: open /Users/kevin/.aws/credentials: no such file or directory
│ EC2RoleRequestError: no EC2 instance role found
│ caused by: RequestError: send request failed
│ caused by: Get "http://169.254.169.254/latest/meta-data/iam/security-credentials/": dial tcp 169.254.169.254:80: connect: host is down

Expected Behavior

Installs the module from AWS using available keys

Actual Behavior

See above.

Steps to Reproduce

1. Source a module from S3
2. Login to AWS using IAM Identity Center / AWS SSO
3. Try to init

Additional Context

If using local file ref for module instead deployment is fine as Terraform using AWS SSO creds without any issue.

aws s3 ls works and can download the file with aws s3 cp.

References

No response

Generative AI / LLM assisted development?

No response

[bschaatsbergen]

Hey @kevinprince,

Thank you for reporting this. It's good to note that Terraform module sourcing relies on functionality from an upstream package called go-getter. I expect this to require an upstream fix, specifically in the AWS credential chain resolution, to properly support SSO federated credentials.