Support GCS as a Terraform Module Source

[SubatomicHero]

Current Terraform Version

Terraform v0.11.13

Use-cases

Terraform currently supports S3 as a Module Source. We only use GCP so want to be able to use GCS as a Module Source

Attempted Solutions

A workaround I am currently using is to use Google Storage Interoperability. This provides AWS keys used for API calls to a S3 like protocol. Doing this I:

• Created the keys
• Exported the keys as environment variables
• Use S3 as a module source e.g.

module "my_module" {
  source = "s3::https://storage.googleapis.com/modules-bucket/awesome-module.tar.gz"
}

Proposal

Ideally this solution should work as such:

1. source = "gcs::https://storage.googleapis.com/modules-bucket/awesome-module.tar.gz"
2. Under the hood, Terraform uses a service account to authenticate

References

None

[davewongillies]

I've raised #21254 to support this

[mildwonkey]

#21254 was merged and will be included in the next terraform release 🎉

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