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hashicorp / terraform-plugin-go

A low-level Go binding for the Terraform protocol for integrations to be built on top of.

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tfprotov5+tfprotov6: Implement MoveResourceState RPC

bflad opened this issue · comments

commented

terraform-plugin-go version

v0.20.0

Use cases

Protocol versions 5.5/6.5, as part of Terraform 1.8, will also be introducing the MoveResourceState RPC, which is intended to enable provider developers to support state move across resource types. In practice, this enables use cases such as renaming resource types or migrating between known-compatible providers with differing resource type names.

Proposal

The MoveResourceState RPC handling is built on top of already existing data handling types, so this implementation is relatively straightforward in the tfprotov5 and tfprotov6 packages:

  • Implement the new MoveResourceState server capability so the providers can announce they support this new RPC.
  • Implement a temporary ResourceServerWithMoveResourceState interface that implements new MoveResourceState method, along with its request and response types.
  • Update tf5server/tf6server implementations for the new RPC and check for the temporary interface.

Another issue will be created to perform the breaking change of moving the MoveResourceState method into the existing ResourceServer interface. This will allow a grace period for all officially supported SDKs to implement the new method without the breaking change, then the breaking change can be announced with the required versions of each SDK all at once when they upgrade this Go module to the version that requires the implementation.

References

commented

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