855f1fd1cd
* Revise host mode. The current implementation of host mode uses a `pulumi host` command and an ad-hoc communication protocol between the engine and client to connect a language host after the host has begun listening. The most significant disadvantages of this approach are the communication protocol (which currently requires the use of stdout), the host-specific command, and the difficulty of accommodating the typical program-bound lifetime for an update. These changes reimplement host mode by adding engine support for connecting to an existing language runtime service rather than launching a plugin. This capability is provided via an engine-specific language runtime, `client`, which accepts the address of the existing languge runtime service as a runtime option. The CLI exposes this runtime via the `--client` flag to the `up` and `preview` commands, which similarly accepts the address of an existing language runtime service as an argument. These changes also adjust the automation API to consume the new host mode implementation.
50 lines
1.6 KiB
Go
50 lines
1.6 KiB
Go
// Copyright 2016-2020, Pulumi Corporation.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package engine
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import (
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"github.com/pkg/errors"
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"google.golang.org/grpc"
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"github.com/pulumi/pulumi/sdk/v2/go/common/resource/plugin"
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"github.com/pulumi/pulumi/sdk/v2/go/common/util/rpcutil"
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pulumirpc "github.com/pulumi/pulumi/sdk/v2/proto/go"
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)
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type clientLanguageRuntimeHost struct {
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plugin.Host
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languageRuntime plugin.LanguageRuntime
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}
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func connectToLanguageRuntime(ctx *plugin.Context, address string) (plugin.Host, error) {
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// Dial the language runtime.
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conn, err := grpc.Dial(address, grpc.WithInsecure(),
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grpc.WithUnaryInterceptor(rpcutil.OpenTracingClientInterceptor()), rpcutil.GrpcChannelOptions())
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if err != nil {
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return nil, errors.Wrap(err, "could not connect to language host")
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}
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client := pulumirpc.NewLanguageRuntimeClient(conn)
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return &clientLanguageRuntimeHost{
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Host: ctx.Host,
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languageRuntime: plugin.NewLanguageRuntimeClient(ctx, clientRuntimeName, client),
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}, nil
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}
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func (host *clientLanguageRuntimeHost) LanguageRuntime(runtime string) (plugin.LanguageRuntime, error) {
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return host.languageRuntime, nil
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}
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