54 lines
2.6 KiB
Markdown
54 lines
2.6 KiB
Markdown
# Releasing a New Version of the Protocol
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Terraform's plugin protocol is the contract between Terraform's plugins and
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Terraform, and as such releasing a new version requires some coordination
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between those pieces. This document is intended to be a checklist to consult
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when adding a new major version of the protocol (X in X.Y) to ensure that
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everything that needs to be is aware of it.
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## New Protobuf File
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The protocol is defined in protobuf files that live in the hashicorp/terraform
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repository. Adding a new version of the protocol involves creating a new
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`.proto` file in that directory. It is recommended that you copy the latest
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protocol file, and modify it accordingly.
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## New terraform-plugin-go Package
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The
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[hashicorp/terraform-plugin-go](https://github.com/hashicorp/terraform-plugin-go)
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repository serves as the foundation for Terraform's plugin ecosystem. It needs
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to know about the new major protocol version. Either open an issue in that repo
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to have the Plugin SDK team add the new package, or if you would like to
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contribute it yourself, open a PR. It is recommended that you copy the package
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for the latest protocol version and modify it accordingly.
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## Update the Registry's List of Allowed Versions
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The Terraform Registry validates the protocol versions a provider advertises
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support for when ingesting providers. Providers will not be able to advertise
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support for the new protocol version until it is added to that list.
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## Update Terraform's Version Constraints
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Terraform only downloads providers that speak protocol versions it is
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compatible with from the Registry during `terraform init`. When adding support
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for a new protocol, you need to tell Terraform it knows that protocol version.
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Modify the `SupportedPluginProtocols` variable in hashicorp/terraform's
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`internal/getproviders/registry_client.go` file to include the new protocol.
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## Test Running a Provider With the Test Framework
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Use the provider test framework to test a provider written with the new
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protocol. This end-to-end test ensures that providers written with the new
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protocol work correctly wtih the test framework, especially in communicating
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the protocol version between the test framework and Terraform.
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## Test Retrieving and Running a Provider From the Registry
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Publish a provider, either to the public registry or to the staging registry,
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and test running `terraform init` and `terraform apply`, along with exercising
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any of the new functionality the protocol version introduces. This end-to-end
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test ensures that all the pieces needing to be updated before practitioners can
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use providers built with the new protocol have been updated.
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