backend/s3: Support credential_process argument

[llamahunter]

Terraform Version

v0.11.13

Terraform Configuration Files

unimportant... but using backend s3 configuration, where aws config uses credential_process

Crash Output

Initializing the backend...

Error configuring the backend "s3": NoCredentialProviders: no valid providers in chain. Deprecated.
For verbose messaging see aws.Config.CredentialsChainVerboseErrors

Please update the configuration in your Terraform files to fix this error
then run this command again.

Expected Behavior

AWS config with credential_process should work

Actual Behavior

aws-sdk-go in terraform core too old (< v1.16.0)

Steps to Reproduce

set up an s3 backend with a ~/.aws/config specifying a credential_process for the profile

Additional Context

This appears to be already fixed in the v0.11 branch. We just need a v0.11.14 release.

References

• 102c78c
• RFC Supporting credential_process for assuming roles using external credential providers terraform-provider-aws#6913

[llamahunter]

Was this fixed by https://github.com/hashicorp/terraform/releases/tag/v0.11.14?

[lorengordon]

It would seem so, according to what is vendored!

• https://github.com/hashicorp/terraform/blob/v0.11.14/vendor/github.com/aws/aws-sdk-go/aws/version.go

[apparentlymart]

Hi @llamahunter,

We have an upgrade AWS SDK. I'm not familiar enough with the AWS SDK releases to know if that was sufficient to get what you wanted here, but it sounds like you had previously checked that the necessary code was on the v0.11 branch, in which case that code is now indeed in the v0.11.14 release.

I'm not familiar with the credential_process feature so I don't know how to verify whether it's working... if you still have whatever setup you used to see it not working when you originally filed this and are able to verify that it's now fixed, that'd be much appreciated!

[llamahunter]

Yes, I verified that aws credential_process works with the latest release 0.11.14 when using s3 backend configuration.

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