f848090479
As documented in issue #616, the inputs/defaults/outputs model we have today has fundamental problems. The crux of the issue is that our current design requires that defaults present in the old state of a resource are applied to the new inputs for that resource. Unfortunately, it is not possible for the engine to decide which defaults remain applicable and which do not; only the provider has that knowledge. These changes take a more tactical approach to resolving this issue than that originally proposed in #616 that avoids breaking compatibility with existing checkpoints. Rather than treating the Pulumi inputs as the provider input properties for a resource, these inputs are first translated by `Check`. In order to accommodate provider defaults that were chosen for the old resource but should not change for the new, `Check` now takes the old provider inputs as well as the new Pulumi inputs. Rather than the Pulumi inputs and provider defaults, the provider inputs returned by `Check` are recorded in the checkpoint file. Put simply, these changes remove defaults as a first-class concept (except inasmuch as is required to retain the ability to read old checkpoint files) and move the responsibilty for manging and merging defaults into the provider that supplies them. Fixes #616.
101 lines
4.7 KiB
Protocol Buffer
101 lines
4.7 KiB
Protocol Buffer
// Copyright 2016-2017, Pulumi Corporation. All rights reserved.
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syntax = "proto3";
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import "plugin.proto";
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import "google/protobuf/empty.proto";
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import "google/protobuf/struct.proto";
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package pulumirpc;
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// ResourceProvider is a service that understands how to create, read, update, or delete resources for types defined
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// within a single package. It is driven by the overall planning engine in response to resource diffs.
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service ResourceProvider {
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// Configure configures the resource provider with "globals" that control its behavior.
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rpc Configure(ConfigureRequest) returns (google.protobuf.Empty){}
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// Invoke dynamically executes a built-in function in the provider.
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rpc Invoke(InvokeRequest) returns (InvokeResponse) {}
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// Check validates that the given property bag is valid for a resource of the given type and returns the inputs
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// that should be passed to successive calls to Diff, Create, or Update for this resource.
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rpc Check(CheckRequest) returns (CheckResponse) {}
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// Diff checks what impacts a hypothetical update will have on the resource's properties.
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rpc Diff(DiffRequest) returns (DiffResponse) {}
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// Create allocates a new instance of the provided resource and returns its unique ID afterwards. (The input ID
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// must be blank.) If this call fails, the resource must not have been created (i.e., it is "transacational").
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rpc Create(CreateRequest) returns (CreateResponse) {}
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// Update updates an existing resource with new values.
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rpc Update(UpdateRequest) returns (UpdateResponse) {}
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// Delete tears down an existing resource with the given ID. If it fails, the resource is assumed to still exist.
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rpc Delete(DeleteRequest) returns (google.protobuf.Empty) {}
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// GetPluginInfo returns generic information about this plugin, like its version.
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rpc GetPluginInfo(google.protobuf.Empty) returns (PluginInfo) {}
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}
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message ConfigureRequest {
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map<string, string> variables = 1; // a map of configuration keys to values.
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}
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message InvokeRequest {
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string tok = 1; // the function token to invoke.
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google.protobuf.Struct args = 2; // the arguments for the function invocation.
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}
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message InvokeResponse {
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google.protobuf.Struct return = 1; // the returned values, if invoke was successful.
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repeated CheckFailure failures = 2; // the failures if any arguments didn't pass verification.
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}
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message CheckRequest {
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string urn = 1; // the Pulumi URN for this resource.
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google.protobuf.Struct olds = 2; // the old Pulumi inputs for this resource, if any.
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google.protobuf.Struct news = 3; // the new Pulumi inputs for this resource.
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}
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message CheckResponse {
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google.protobuf.Struct inputs = 1; // the provider inputs for this resource.
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repeated CheckFailure failures = 2; // any validation failures that occurred.
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}
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message CheckFailure {
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string property = 1; // the property that failed validation.
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string reason = 2; // the reason that the property failed validation.
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}
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message DiffRequest {
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string id = 1; // the ID of the resource to diff.
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string urn = 2; // the Pulumi URN for this resource.
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google.protobuf.Struct olds = 3; // the old values of provider inputs to diff.
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google.protobuf.Struct news = 4; // the new values of provider inputs to diff.
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}
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message DiffResponse {
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repeated string replaces = 1; // if this update requires a replacement, the set of properties triggering it.
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repeated string stables = 2; // an optional list of properties that will not ever change.
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}
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message CreateRequest {
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string urn = 1; // the Pulumi URN for this resource.
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google.protobuf.Struct properties = 2; // the provider inputs to set during creation.
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}
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message CreateResponse {
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string id = 1; // the ID of the created resource.
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google.protobuf.Struct properties = 2; // any properties that were computed during creation.
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}
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message UpdateRequest {
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string id = 1; // the ID of the resource to update.
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string urn = 2; // the Pulumi URN for this resource.
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google.protobuf.Struct olds = 3; // the old values of provider inputs for the resource to update.
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google.protobuf.Struct news = 4; // the new values of provider inputs for the resource to update.
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}
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message UpdateResponse {
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google.protobuf.Struct properties = 1; // any properties that were computed during updating.
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}
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message DeleteRequest {
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string id = 1; // the ID of the resource to delete.
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string urn = 2; // the Pulumi URN for this resource.
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google.protobuf.Struct properties = 3; // the current properties on the resource.
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}
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