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"525b4ec142c6b68a2d10f01f7bbf6755599ca3f81ea53b8431b7dd348f5fdb2d" diff --git a/Cargo.toml b/Cargo.toml new file mode 100644 index 0000000..3bef4f1 --- /dev/null +++ b/Cargo.toml @@ -0,0 +1,14 @@ +[package] +name = "terraform-provider-terustform" +version = "0.1.0" +edition = "2021" + +[dependencies] +eyre = "0.6.12" +prost = "0.12.4" +rustls = { version = "0.23.4", default-features = false, features = ["ring", "logging", "std", "tls12"] } +tokio = { version = "1.37.0", features = ["full"] } +tonic = "0.11.0" + +[build-dependencies] +tonic-build = "0.11.0" diff --git a/build.rs b/build.rs new file mode 100644 index 0000000..947ecc2 --- /dev/null +++ b/build.rs @@ -0,0 +1,4 @@ +fn main() -> Result<(), Box> { + tonic_build::compile_protos("proto/tfplugin6.6.proto")?; + Ok(()) +} diff --git a/init-nix b/init-nix new file mode 100644 index 0000000..1a2189b --- /dev/null +++ b/init-nix @@ -0,0 +1,8 @@ +#!/usr/bin/env bash + +echo "use nix" > .envrc +cat > shell.nix < {} }: pkgs.mkShell { + packages = []; +} +EOF diff --git a/proto/tfplugin6.6.proto b/proto/tfplugin6.6.proto new file mode 100644 index 0000000..97c5a41 --- /dev/null +++ b/proto/tfplugin6.6.proto @@ -0,0 +1,604 @@ +// Copyright (c) HashiCorp, Inc. +// SPDX-License-Identifier: MPL-2.0 + +// Terraform Plugin RPC protocol version 6.6 +// +// This file defines version 6.6 of the RPC protocol. To implement a plugin +// against this protocol, copy this definition into your own codebase and +// use protoc to generate stubs for your target language. +// +// This file will not be updated. Any minor versions of protocol 6 to follow +// should copy this file and modify the copy while maintaing backwards +// compatibility. Breaking changes, if any are required, will come +// in a subsequent major version with its own separate proto definition. +// +// Note that only the proto files included in a release tag of Terraform are +// official protocol releases. Proto files taken from other commits may include +// incomplete changes or features that did not make it into a final release. +// In all reasonable cases, plugin developers should take the proto file from +// the tag of the most recent release of Terraform, and not from the main +// branch or any other development branch. +// +syntax = "proto3"; +option go_package = "github.com/hashicorp/terraform/internal/tfplugin6"; + +package tfplugin6; + +// DynamicValue is an opaque encoding of terraform data, with the field name +// indicating the encoding scheme used. +message DynamicValue { + bytes msgpack = 1; + bytes json = 2; +} + +message Diagnostic { + enum Severity { + INVALID = 0; + ERROR = 1; + WARNING = 2; + } + Severity severity = 1; + string summary = 2; + string detail = 3; + AttributePath attribute = 4; +} + +message FunctionError { + string text = 1; + // The optional function_argument records the index position of the + // argument which caused the error. + optional int64 function_argument = 2; +} + +message AttributePath { + message Step { + oneof selector { + // Set "attribute_name" to represent looking up an attribute + // in the current object value. + string attribute_name = 1; + // Set "element_key_*" to represent looking up an element in + // an indexable collection type. + string element_key_string = 2; + int64 element_key_int = 3; + } + } + repeated Step steps = 1; +} + +message StopProvider { + message Request { + } + message Response { + string Error = 1; + } +} + +// RawState holds the stored state for a resource to be upgraded by the +// provider. It can be in one of two formats, the current json encoded format +// in bytes, or the legacy flatmap format as a map of strings. +message RawState { + bytes json = 1; + map flatmap = 2; +} + +enum StringKind { + PLAIN = 0; + MARKDOWN = 1; +} + +// Schema is the configuration schema for a Resource or Provider. +message Schema { + message Block { + int64 version = 1; + repeated Attribute attributes = 2; + repeated NestedBlock block_types = 3; + string description = 4; + StringKind description_kind = 5; + bool deprecated = 6; + } + + message Attribute { + string name = 1; + bytes type = 2; + Object nested_type = 10; + string description = 3; + bool required = 4; + bool optional = 5; + bool computed = 6; + bool sensitive = 7; + StringKind description_kind = 8; + bool deprecated = 9; + } + + message NestedBlock { + enum NestingMode { + INVALID = 0; + SINGLE = 1; + LIST = 2; + SET = 3; + MAP = 4; + GROUP = 5; + } + + string type_name = 1; + Block block = 2; + NestingMode nesting = 3; + int64 min_items = 4; + int64 max_items = 5; + } + + message Object { + enum NestingMode { + INVALID = 0; + SINGLE = 1; + LIST = 2; + SET = 3; + MAP = 4; + } + + repeated Attribute attributes = 1; + NestingMode nesting = 3; + + // MinItems and MaxItems were never used in the protocol, and have no + // effect on validation. + int64 min_items = 4 [deprecated = true]; + int64 max_items = 5 [deprecated = true]; + } + + // The version of the schema. + // Schemas are versioned, so that providers can upgrade a saved resource + // state when the schema is changed. + int64 version = 1; + + // Block is the top level configuration block for this schema. + Block block = 2; +} + +message Function { + // parameters is the ordered list of positional function parameters. + repeated Parameter parameters = 1; + + // variadic_parameter is an optional final parameter which accepts + // zero or more argument values, in which Terraform will send an + // ordered list of the parameter type. + Parameter variadic_parameter = 2; + + // Return is the function return parameter. + Return return = 3; + + // summary is the human-readable shortened documentation for the function. + string summary = 4; + + // description is human-readable documentation for the function. + string description = 5; + + // description_kind is the formatting of the description. + StringKind description_kind = 6; + + // deprecation_message is human-readable documentation if the + // function is deprecated. + string deprecation_message = 7; + + message Parameter { + // name is the human-readable display name for the parameter. + string name = 1; + + // type is the type constraint for the parameter. + bytes type = 2; + + // allow_null_value when enabled denotes that a null argument value can + // be passed to the provider. When disabled, Terraform returns an error + // if the argument value is null. + bool allow_null_value = 3; + + // allow_unknown_values when enabled denotes that only wholly known + // argument values will be passed to the provider. When disabled, + // Terraform skips the function call entirely and assumes an unknown + // value result from the function. + bool allow_unknown_values = 4; + + // description is human-readable documentation for the parameter. + string description = 5; + + // description_kind is the formatting of the description. + StringKind description_kind = 6; + } + + message Return { + // type is the type constraint for the function result. + bytes type = 1; + } +} + +// ServerCapabilities allows providers to communicate extra information +// regarding supported protocol features. This is used to indicate +// availability of certain forward-compatible changes which may be optional +// in a major protocol version, but cannot be tested for directly. +message ServerCapabilities { + // The plan_destroy capability signals that a provider expects a call + // to PlanResourceChange when a resource is going to be destroyed. + bool plan_destroy = 1; + + // The get_provider_schema_optional capability indicates that this + // provider does not require calling GetProviderSchema to operate + // normally, and the caller can used a cached copy of the provider's + // schema. + bool get_provider_schema_optional = 2; + + // The move_resource_state capability signals that a provider supports the + // MoveResourceState RPC. + bool move_resource_state = 3; +} + +// Deferred is a message that indicates that change is deferred for a reason. +message Deferred { + // Reason is the reason for deferring the change. + enum Reason { + // UNKNOWN is the default value, and should not be used. + UNKNOWN = 0; + // RESOURCE_CONFIG_UNKNOWN is used when the config is partially unknown and the real + // values need to be known before the change can be planned. + RESOURCE_CONFIG_UNKNOWN = 1; + // PROVIDER_CONFIG_UNKNOWN is used when parts of the provider configuration + // are unknown, e.g. the provider configuration is only known after the apply is done. + PROVIDER_CONFIG_UNKNOWN = 2; + // ABSENT_PREREQ is used when a hard dependency has not been satisfied. + ABSENT_PREREQ = 3; + } + + // reason is the reason for deferring the change. + Reason reason = 1; +} + + +service Provider { + //////// Information about what a provider supports/expects + + // GetMetadata returns upfront information about server capabilities and + // supported resource types without requiring the server to instantiate all + // schema information, which may be memory intensive. This RPC is optional, + // where clients may receive an unimplemented RPC error. Clients should + // ignore the error and call the GetProviderSchema RPC as a fallback. + rpc GetMetadata(GetMetadata.Request) returns (GetMetadata.Response); + + // GetSchema returns schema information for the provider, data resources, + // and managed resources. + rpc GetProviderSchema(GetProviderSchema.Request) returns (GetProviderSchema.Response); + rpc ValidateProviderConfig(ValidateProviderConfig.Request) returns (ValidateProviderConfig.Response); + rpc ValidateResourceConfig(ValidateResourceConfig.Request) returns (ValidateResourceConfig.Response); + rpc ValidateDataResourceConfig(ValidateDataResourceConfig.Request) returns (ValidateDataResourceConfig.Response); + rpc UpgradeResourceState(UpgradeResourceState.Request) returns (UpgradeResourceState.Response); + + //////// One-time initialization, called before other functions below + rpc ConfigureProvider(ConfigureProvider.Request) returns (ConfigureProvider.Response); + + //////// Managed Resource Lifecycle + rpc ReadResource(ReadResource.Request) returns (ReadResource.Response); + rpc PlanResourceChange(PlanResourceChange.Request) returns (PlanResourceChange.Response); + rpc ApplyResourceChange(ApplyResourceChange.Request) returns (ApplyResourceChange.Response); + rpc ImportResourceState(ImportResourceState.Request) returns (ImportResourceState.Response); + rpc MoveResourceState(MoveResourceState.Request) returns (MoveResourceState.Response); + rpc ReadDataSource(ReadDataSource.Request) returns (ReadDataSource.Response); + + // GetFunctions returns the definitions of all functions. + rpc GetFunctions(GetFunctions.Request) returns (GetFunctions.Response); + + //////// Provider-contributed Functions + rpc CallFunction(CallFunction.Request) returns (CallFunction.Response); + + //////// Graceful Shutdown + rpc StopProvider(StopProvider.Request) returns (StopProvider.Response); +} + +message GetMetadata { + message Request { + } + + message Response { + ServerCapabilities server_capabilities = 1; + repeated Diagnostic diagnostics = 2; + repeated DataSourceMetadata data_sources = 3; + repeated ResourceMetadata resources = 4; + // functions returns metadata for any functions. + repeated FunctionMetadata functions = 5; + } + + message FunctionMetadata { + // name is the function name. + string name = 1; + } + + message DataSourceMetadata { + string type_name = 1; + } + + message ResourceMetadata { + string type_name = 1; + } +} + +message GetProviderSchema { + message Request { + } + message Response { + Schema provider = 1; + map resource_schemas = 2; + map data_source_schemas = 3; + map functions = 7; + repeated Diagnostic diagnostics = 4; + Schema provider_meta = 5; + ServerCapabilities server_capabilities = 6; + } +} + +message ValidateProviderConfig { + message Request { + DynamicValue config = 1; + } + message Response { + repeated Diagnostic diagnostics = 2; + } +} + +message UpgradeResourceState { + // Request is the message that is sent to the provider during the + // UpgradeResourceState RPC. + // + // This message intentionally does not include configuration data as any + // configuration-based or configuration-conditional changes should occur + // during the PlanResourceChange RPC. Additionally, the configuration is + // not guaranteed to exist (in the case of resource destruction), be wholly + // known, nor match the given prior state, which could lead to unexpected + // provider behaviors for practitioners. + message Request { + string type_name = 1; + + // version is the schema_version number recorded in the state file + int64 version = 2; + + // raw_state is the raw states as stored for the resource. Core does + // not have access to the schema of prior_version, so it's the + // provider's responsibility to interpret this value using the + // appropriate older schema. The raw_state will be the json encoded + // state, or a legacy flat-mapped format. + RawState raw_state = 3; + } + message Response { + // new_state is a msgpack-encoded data structure that, when interpreted with + // the _current_ schema for this resource type, is functionally equivalent to + // that which was given in prior_state_raw. + DynamicValue upgraded_state = 1; + + // diagnostics describes any errors encountered during migration that could not + // be safely resolved, and warnings about any possibly-risky assumptions made + // in the upgrade process. + repeated Diagnostic diagnostics = 2; + } +} + +message ValidateResourceConfig { + message Request { + string type_name = 1; + DynamicValue config = 2; + } + message Response { + repeated Diagnostic diagnostics = 1; + } +} + +message ValidateDataResourceConfig { + message Request { + string type_name = 1; + DynamicValue config = 2; + } + message Response { + repeated Diagnostic diagnostics = 1; + } +} + +message ConfigureProvider { + message Request { + string terraform_version = 1; + DynamicValue config = 2; + } + message Response { + repeated Diagnostic diagnostics = 1; + } +} + +message ReadResource { + // Request is the message that is sent to the provider during the + // ReadResource RPC. + // + // This message intentionally does not include configuration data as any + // configuration-based or configuration-conditional changes should occur + // during the PlanResourceChange RPC. Additionally, the configuration is + // not guaranteed to be wholly known nor match the given prior state, which + // could lead to unexpected provider behaviors for practitioners. + message Request { + string type_name = 1; + DynamicValue current_state = 2; + bytes private = 3; + DynamicValue provider_meta = 4; + // deferral_allowed signals that the provider is allowed to defer the + // changes. If set the caller needs to handle the deferred response. + bool deferral_allowed = 5; + } + message Response { + DynamicValue new_state = 1; + repeated Diagnostic diagnostics = 2; + bytes private = 3; + // deferred is set if the provider is deferring the change. If set the caller + // needs to handle the deferral. + Deferred deferred = 4; + } +} + +message PlanResourceChange { + message Request { + string type_name = 1; + DynamicValue prior_state = 2; + DynamicValue proposed_new_state = 3; + DynamicValue config = 4; + bytes prior_private = 5; + DynamicValue provider_meta = 6; + + // deferral_allowed signals that the provider is allowed to defer the + // changes. If set the caller needs to handle the deferred response. + bool deferral_allowed = 7; + } + + message Response { + DynamicValue planned_state = 1; + repeated AttributePath requires_replace = 2; + bytes planned_private = 3; + repeated Diagnostic diagnostics = 4; + + // This may be set only by the helper/schema "SDK" in the main Terraform + // repository, to request that Terraform Core >=0.12 permit additional + // inconsistencies that can result from the legacy SDK type system + // and its imprecise mapping to the >=0.12 type system. + // The change in behavior implied by this flag makes sense only for the + // specific details of the legacy SDK type system, and are not a general + // mechanism to avoid proper type handling in providers. + // + // ==== DO NOT USE THIS ==== + // ==== THIS MUST BE LEFT UNSET IN ALL OTHER SDKS ==== + // ==== DO NOT USE THIS ==== + bool legacy_type_system = 5; + + // deferred is set if the provider is deferring the change. If set the caller + // needs to handle the deferral. + Deferred deferred = 6; + } +} + +message ApplyResourceChange { + message Request { + string type_name = 1; + DynamicValue prior_state = 2; + DynamicValue planned_state = 3; + DynamicValue config = 4; + bytes planned_private = 5; + DynamicValue provider_meta = 6; + } + message Response { + DynamicValue new_state = 1; + bytes private = 2; + repeated Diagnostic diagnostics = 3; + + // This may be set only by the helper/schema "SDK" in the main Terraform + // repository, to request that Terraform Core >=0.12 permit additional + // inconsistencies that can result from the legacy SDK type system + // and its imprecise mapping to the >=0.12 type system. + // The change in behavior implied by this flag makes sense only for the + // specific details of the legacy SDK type system, and are not a general + // mechanism to avoid proper type handling in providers. + // + // ==== DO NOT USE THIS ==== + // ==== THIS MUST BE LEFT UNSET IN ALL OTHER SDKS ==== + // ==== DO NOT USE THIS ==== + bool legacy_type_system = 4; + } +} + +message ImportResourceState { + message Request { + string type_name = 1; + string id = 2; + // deferral_allowed signals that the provider is allowed to defer the + // changes. If set the caller needs to handle the deferred response. + bool deferral_allowed = 3; + } + + message ImportedResource { + string type_name = 1; + DynamicValue state = 2; + bytes private = 3; + } + + message Response { + repeated ImportedResource imported_resources = 1; + repeated Diagnostic diagnostics = 2; + // deferred is set if the provider is deferring the change. If set the caller + // needs to handle the deferral. + Deferred deferred = 3; + } +} + +message MoveResourceState { + message Request { + // The address of the provider the resource is being moved from. + string source_provider_address = 1; + + // The resource type that the resource is being moved from. + string source_type_name = 2; + + // The schema version of the resource type that the resource is being + // moved from. + int64 source_schema_version = 3; + + // The raw state of the resource being moved. Only the json field is + // populated, as there should be no legacy providers using the flatmap + // format that support newly introduced RPCs. + RawState source_state = 4; + + // The resource type that the resource is being moved to. + string target_type_name = 5; + + // The private state of the resource being moved. + bytes source_private = 6; + } + + message Response { + // The state of the resource after it has been moved. + DynamicValue target_state = 1; + + // Any diagnostics that occurred during the move. + repeated Diagnostic diagnostics = 2; + + // The private state of the resource after it has been moved. + bytes target_private = 3; + } +} + +message ReadDataSource { + message Request { + string type_name = 1; + DynamicValue config = 2; + DynamicValue provider_meta = 3; + // deferral_allowed signals that the provider is allowed to defer the + // changes. If set the caller needs to handle the deferred response. + bool deferral_allowed = 4; + } + message Response { + DynamicValue state = 1; + repeated Diagnostic diagnostics = 2; + // deferred is set if the provider is deferring the change. If set the caller + // needs to handle the deferral. + Deferred deferred = 3; + } +} + +message GetFunctions { + message Request {} + + message Response { + // functions is a mapping of function names to definitions. + map functions = 1; + + // diagnostics is any warnings or errors. + repeated Diagnostic diagnostics = 2; + } +} + +message CallFunction { + message Request { + string name = 1; + repeated DynamicValue arguments = 2; + } + message Response { + DynamicValue result = 1; + FunctionError error = 2; + } +} diff --git a/shell.nix b/shell.nix new file mode 100644 index 0000000..372b5a6 --- /dev/null +++ b/shell.nix @@ -0,0 +1,4 @@ +{ pkgs ? import { } }: pkgs.mkShell { + buildInputs = [ ]; + packages = with pkgs; [ opentofu protobuf ]; +} diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..647e78b --- /dev/null +++ b/src/main.rs @@ -0,0 +1,59 @@ +use std::{ + env, + io::Write, + net::{IpAddr, Ipv4Addr, SocketAddr}, +}; + +use eyre::{bail, ensure, Context, Result}; + +mod server; + +#[tokio::main] +async fn main() -> eyre::Result<()> { + let addr = init_handshake(); + + let addr = match addr { + Ok(addr) => addr, + Err(err) => { + println!("{:?}", err); + bail!("init error"); + } + }; + + let cert = std::env::var("PLUGIN_CLIENT_CERT").wrap_err("PLUGIN_CLIENT_CERT not found")?; + + tonic::transport::Server::builder() + .add_service(server::tfplugin6::provider_server::ProviderServer::new( + server::MyProvider, + )) + .serve(addr) + .await + .wrap_err("failed to start server")?; + + Ok(()) +} + +fn init_handshake() -> Result { + // https://github.com/hashicorp/go-plugin/blob/8d2aaa458971cba97c3bfec1b0380322e024b514/docs/internals.md + + let min_port = env::var("PLUGIN_MIN_PORT") + .wrap_err("PLUGIN_MIN_PORT not found")? + .parse::() + .wrap_err("PLUGIN_MIN_PORT not an int")?; + let max_port = env::var("PLUGIN_MAX_PORT") + .wrap_err("PLUGIN_MAX_PORT not found")? + .parse::() + .wrap_err("PLUGIN_MAX_PORT not an int")?; + + let port = min_port + 15; // chosen by a d20, lol + ensure!(port < max_port); + + let addr = IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)); + let addr = SocketAddr::new(addr, port); + + const VERSION: u8 = 6; + + println!("1|{VERSION}|tcp|{addr}|grpc"); + + Ok(addr) +} diff --git a/src/server.rs b/src/server.rs new file mode 100644 index 0000000..b27336c --- /dev/null +++ b/src/server.rs @@ -0,0 +1,138 @@ +pub mod tfplugin6 { + tonic::include_proto!("tfplugin6"); +} + +use tfplugin6::provider_server::{Provider, ProviderServer}; +use tonic::{transport::Server, Request, Response, Result, Status}; + +#[derive(Debug, Default)] +pub struct MyProvider; + +#[tonic::async_trait] +impl Provider for MyProvider { + /// GetMetadata returns upfront information about server capabilities and + /// supported resource types without requiring the server to instantiate all + /// schema information, which may be memory intensive. This RPC is optional, + /// where clients may receive an unimplemented RPC error. Clients should + /// ignore the error and call the GetProviderSchema RPC as a fallback. + async fn get_metadata( + &self, + request: tonic::Request, + ) -> std::result::Result, tonic::Status> { + todo!() + } + /// GetSchema returns schema information for the provider, data resources, + /// and managed resources. + async fn get_provider_schema( + &self, + request: tonic::Request, + ) -> std::result::Result, tonic::Status> + { + todo!() + } + async fn validate_provider_config( + &self, + request: tonic::Request, + ) -> std::result::Result< + tonic::Response, + tonic::Status, + > { + todo!() + } + async fn validate_resource_config( + &self, + request: tonic::Request, + ) -> std::result::Result< + tonic::Response, + tonic::Status, + > { + todo!() + } + async fn validate_data_resource_config( + &self, + request: tonic::Request, + ) -> std::result::Result< + tonic::Response, + tonic::Status, + > { + todo!() + } + async fn upgrade_resource_state( + &self, + request: tonic::Request, + ) -> std::result::Result, tonic::Status> + { + todo!() + } + /// ////// One-time initialization, called before other functions below + async fn configure_provider( + &self, + request: tonic::Request, + ) -> std::result::Result, tonic::Status> + { + todo!() + } + /// ////// Managed Resource Lifecycle + async fn read_resource( + &self, + request: tonic::Request, + ) -> std::result::Result, tonic::Status> { + todo!() + } + async fn plan_resource_change( + &self, + request: tonic::Request, + ) -> std::result::Result, tonic::Status> + { + todo!() + } + async fn apply_resource_change( + &self, + request: tonic::Request, + ) -> std::result::Result, tonic::Status> + { + todo!() + } + async fn import_resource_state( + &self, + request: tonic::Request, + ) -> std::result::Result, tonic::Status> + { + todo!() + } + async fn move_resource_state( + &self, + request: tonic::Request, + ) -> std::result::Result, tonic::Status> + { + todo!() + } + async fn read_data_source( + &self, + request: tonic::Request, + ) -> std::result::Result, tonic::Status> + { + todo!() + } + /// GetFunctions returns the definitions of all functions. + async fn get_functions( + &self, + request: tonic::Request, + ) -> std::result::Result, tonic::Status> { + todo!() + } + /// ////// Provider-contributed Functions + async fn call_function( + &self, + request: tonic::Request, + ) -> std::result::Result, tonic::Status> { + todo!() + } + /// ////// Graceful Shutdown + async fn stop_provider( + &self, + request: tonic::Request, + ) -> std::result::Result, tonic::Status> { + todo!() + } +} diff --git a/test/main.tf b/test/main.tf new file mode 100644 index 0000000..ef06f87 --- /dev/null +++ b/test/main.tf @@ -0,0 +1,7 @@ +terraform { + required_providers { + terustform = { + source = "github.com/Nilstrieb/terustform" + } + } +}