* Revert "Parallelize much more of resource creation in the JS language provider SDK (#1618)" This reverts commit4edd244a26
. * Revert "Process our async-work-queue in parallel. (#1619)" This reverts commitb8c1cb9574
.
365 lines
17 KiB
TypeScript
365 lines
17 KiB
TypeScript
// Copyright 2016-2018, 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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import * as grpc from "grpc";
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import * as log from "../log";
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import { ID, Input, Inputs, Output, Resource, ResourceOptions, URN } from "../resource";
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import { debuggablePromise, errorString } from "./debuggable";
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import {
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deserializeProperties,
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deserializeProperty,
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OutputResolvers,
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resolveProperties,
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serializeProperties,
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serializeProperty,
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serializeResourceProperties,
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transferProperties,
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} from "./rpc";
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import { excessiveDebugOutput, getMonitor, rpcKeepAlive, serialize } from "./settings";
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const gstruct = require("google-protobuf/google/protobuf/struct_pb.js");
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const resproto = require("../proto/resource_pb.js");
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interface ResourceResolverOperation {
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// A resolver for a resource's URN.
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resolveURN: (urn: URN) => void;
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// A resolver for a resource's ID (for custom resources only).
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resolveID: ((v: ID, performApply: boolean) => void) | undefined;
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// A collection of resolvers for a resource's properties.
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resolvers: OutputResolvers;
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// A parent URN, fully resolved, if any.
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parentURN: URN | undefined;
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// All serialized properties, fully awaited, serialized, and ready to go.
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serializedProps: Record<string, any>;
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// A set of dependency URNs that this resource is dependent upon (both implicitly and explicitly).
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dependencies: Set<URN>;
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}
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/**
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* Reads an existing custom resource's state from the resource monitor. Note that resources read in this way
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* will not be part of the resulting stack's state, as they are presumed to belong to another.
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*/
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export function readResource(res: Resource, t: string, name: string, props: Inputs, opts: ResourceOptions): void {
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const id: Input<ID> | undefined = opts.id;
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if (!id) {
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throw new Error("Cannot read resource whose options are lacking an ID value");
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}
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const label = `resource:${name}[${t}]#...`;
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log.debug(`Reading resource: id=${id}, t=${t}, name=${name}`);
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const monitor: any = getMonitor();
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const resopAsync = prepareResource(label, res, true, props, opts);
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debuggablePromise(resopAsync.then(async (resop) => {
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const resolvedID = await serializeProperty(label, id, []);
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log.debug(`ReadResource RPC prepared: id=${resolvedID}, t=${t}, name=${name}` +
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(excessiveDebugOutput ? `, obj=${JSON.stringify(resop.serializedProps)}` : ``));
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// Create a resource request and do the RPC.
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const req = new resproto.ReadResourceRequest();
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req.setType(t);
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req.setName(name);
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req.setId(resolvedID);
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req.setParent(resop.parentURN);
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req.setProperties(gstruct.Struct.fromJavaScript(resop.serializedProps));
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// Now run the operation, serializing the invocation if necessary.
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const opLabel = `monitor.readResource(${label})`;
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runAsyncResourceOp(opLabel, async () => {
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const resp: any = await debuggablePromise(new Promise((resolve, reject) =>
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monitor.readResource(req, (err: Error, innerResponse: any) => {
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log.debug(`ReadResource RPC finished: ${label}; err: ${err}, resp: ${innerResponse}`);
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if (err) {
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log.error(`Failed to read resource #${resolvedID} '${name}' [${t}]: ${err.stack}`);
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reject(err);
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}
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else {
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resolve(innerResponse);
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}
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})), opLabel);
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// Now resolve everything: the URN, the ID (supplied as input), and the output properties.
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resop.resolveURN(resp.getUrn());
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resop.resolveID!(resolvedID, resolvedID !== undefined);
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await resolveOutputs(res, t, name, props, resp.getProperties(), resop.resolvers);
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});
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}));
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}
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/**
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* registerResource registers a new resource object with a given type t and name. It returns the auto-generated
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* URN and the ID that will resolve after the deployment has completed. All properties will be initialized to property
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* objects that the registration operation will resolve at the right time (or remain unresolved for deployments).
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*/
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export function registerResource(res: Resource, t: string, name: string, custom: boolean,
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props: Inputs, opts: ResourceOptions): void {
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const label = `resource:${name}[${t}]`;
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log.debug(`Registering resource: t=${t}, name=${name}, custom=${custom}`);
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const monitor: any = getMonitor();
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const resopAsync = prepareResource(label, res, custom, props, opts);
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debuggablePromise(resopAsync.then(async (resop) => {
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log.debug(`RegisterResource RPC prepared: t=${t}, name=${name}` +
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(excessiveDebugOutput ? `, obj=${JSON.stringify(resop.serializedProps)}` : ``));
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const req = new resproto.RegisterResourceRequest();
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req.setType(t);
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req.setName(name);
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req.setParent(resop.parentURN);
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req.setCustom(custom);
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req.setObject(gstruct.Struct.fromJavaScript(resop.serializedProps));
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req.setProtect(opts.protect);
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req.setDependenciesList(Array.from(resop.dependencies));
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// Now run the operation, serializing the invocation if necessary.
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const opLabel = `monitor.registerResource(${label})`;
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runAsyncResourceOp(opLabel, async () => {
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const resp: any = await debuggablePromise(new Promise((resolve, reject) =>
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monitor.registerResource(req, (err: grpc.ServiceError, innerResponse: any) => {
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log.debug(`RegisterResource RPC finished: ${label}; err: ${err}, resp: ${innerResponse}`);
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if (err) {
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// If the monitor is unavailable, it is in the process of shutting down or has already
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// shut down. Don't emit an error and don't do any more RPCs.
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if (err.code === grpc.status.UNAVAILABLE) {
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log.debug("Resource monitor is terminating");
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waitForDeath();
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}
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log.error(`Failed to register new resource '${name}' [${t}]: ${err.stack}`);
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reject(err);
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}
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else {
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resolve(innerResponse);
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}
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})), opLabel);
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resop.resolveURN(resp.getUrn());
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// Note: 'id || undefined' is intentional. We intentionally collapse falsy values to
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// undefined so that later parts of our system don't have to deal with values like 'null'.
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if (resop.resolveID) {
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const id = resp.getId() || undefined;
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resop.resolveID(id, id !== undefined);
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}
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// Now resolve the output properties.
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await resolveOutputs(res, t, name, props, resp.getObject(), resop.resolvers);
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});
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}));
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}
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/**
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* Prepares for an RPC that will manufacture a resource, and hence deals with input and output properties.
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*/
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async function prepareResource(label: string, res: Resource, custom: boolean,
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props: Inputs, opts: ResourceOptions): Promise<ResourceResolverOperation> {
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// Simply initialize the URN property and get prepared to resolve it later on.
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// Note: a resource urn will always get a value, and thus the output property
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// for it can always run .apply calls.
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let resolveURN: (urn: URN) => void;
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(res as any).urn = Output.create(
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res,
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debuggablePromise(
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new Promise<URN>(resolve => resolveURN = resolve),
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`resolveURN(${label})`),
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/*performApply:*/ Promise.resolve(true));
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// If a custom resource, make room for the ID property.
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let resolveID: ((v: any, performApply: boolean) => void) | undefined;
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if (custom) {
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let resolveValue: (v: ID) => void;
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let resolvePerformApply: (v: boolean) => void;
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(res as any).id = Output.create(
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res,
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debuggablePromise(new Promise<ID>(resolve => resolveValue = resolve), `resolveID(${label})`),
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debuggablePromise(new Promise<boolean>(
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resolve => resolvePerformApply = resolve), `resolveIDPerformApply(${label})`));
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resolveID = (v, performApply) => {
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resolveValue(v);
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resolvePerformApply(performApply);
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};
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}
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// Now "transfer" all input properties into unresolved Promises on res. This way,
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// this resource will look like it has all its output properties to anyone it is
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// passed to. However, those promises won't actually resolve until the registerResource
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// RPC returns
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const resolvers = transferProperties(res, label, props);
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/** IMPORTANT! We should never await prior to this line, otherwise the Resource will be partly uninitialized. */
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// Before we can proceed, all our dependencies must be finished.
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const dependsOn = opts.dependsOn || [];
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const explicitURNDeps = await debuggablePromise(
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Promise.all(dependsOn.map(d => d.urn.promise())), `dependsOn(${label})`);
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// Serialize out all our props to their final values. In doing so, we'll also collect all
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// the Resources pointed to by any Dependency objects we encounter, adding them to 'propertyDependencies'.
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const implicitDependencies: Resource[] = [];
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const serializedProps = await serializeResourceProperties(label, props, implicitDependencies);
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let parentURN: URN | undefined;
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if (opts.parent) {
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parentURN = await opts.parent.urn.promise();
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}
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const dependencies: Set<URN> = new Set<URN>(explicitURNDeps);
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for (const implicitDep of implicitDependencies) {
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dependencies.add(await implicitDep.urn.promise());
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}
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return {
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resolveURN: resolveURN!,
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resolveID: resolveID,
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resolvers: resolvers,
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serializedProps: serializedProps,
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parentURN: parentURN,
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dependencies: dependencies,
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};
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}
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/**
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* Finishes a resource creation RPC operation by resolving its outputs to the resulting RPC payload.
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*/
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async function resolveOutputs(res: Resource, t: string, name: string,
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props: Inputs, outputs: any, resolvers: OutputResolvers): Promise<void> {
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// Produce a combined set of property states, starting with inputs and then applying
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// outputs. If the same property exists in the inputs and outputs states, the output wins.
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const allProps: Record<string, any> = {};
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if (outputs) {
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Object.assign(allProps, deserializeProperties(outputs));
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}
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const label = `resource:${name}[${t}]#...`;
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for (const key of Object.keys(props)) {
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if (!allProps.hasOwnProperty(key)) {
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// input prop the engine didn't give us a final value for. Just use the value passed into the resource
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// after round-tripping it through serialization. We do the round-tripping primarily s.t. we ensure that
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// Output values are handled properly w.r.t. unknowns.
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const inputProp = await serializeProperty(label, props[key], []);
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if (inputProp === undefined) {
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continue;
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}
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allProps[key] = deserializeProperty(inputProp);
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}
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}
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resolveProperties(res, resolvers, t, name, allProps);
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}
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/**
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* registerResourceOutputs completes the resource registration, attaching an optional set of computed outputs.
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*/
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export function registerResourceOutputs(res: Resource, outputs: Inputs) {
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// Now run the operation. Note that we explicitly do not serialize output registration with
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// respect to other resource operations, as outputs may depend on properties of other resources
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// that will not resolve until later turns. This would create a circular promise chain that can
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// never resolve.
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const opLabel = `monitor.registerResourceOutputs(...)`;
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runAsyncResourceOp(opLabel, async () => {
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// The registration could very well still be taking place, so we will need to wait for its
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// URN. Additionally, the output properties might have come from other resources, so we
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// must await those too.
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const urn = await res.urn.promise();
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const outputsObj = gstruct.Struct.fromJavaScript(
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await serializeProperties(`completeResource`, outputs));
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log.debug(`RegisterResourceOutputs RPC prepared: urn=${urn}` +
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(excessiveDebugOutput ? `, outputs=${JSON.stringify(outputsObj)}` : ``));
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// Fetch the monitor and make an RPC request.
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const monitor: any = getMonitor();
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const req = new resproto.RegisterResourceOutputsRequest();
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req.setUrn(urn);
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req.setOutputs(outputsObj);
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await debuggablePromise(new Promise((resolve, reject) =>
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monitor.registerResourceOutputs(req, (err: grpc.ServiceError, innerResponse: any) => {
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log.debug(`RegisterResourceOutputs RPC finished: urn=${urn}; `+
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`err: ${err}, resp: ${innerResponse}`);
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if (err) {
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// If the monitor is unavailable, it is in the process of shutting down or has already
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// shut down. Don't emit an error and don't do any more RPCs.
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if (err.code === grpc.status.UNAVAILABLE) {
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log.debug("Resource monitor is terminating");
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waitForDeath();
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}
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log.error(`Failed to end new resource registration '${urn}': ${err.stack}`);
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reject(err);
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}
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else {
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resolve();
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}
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})), opLabel);
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}, false);
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}
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/**
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* resourceChain is used to serialize all resource requests. If we don't do this, all resource operations will be
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* entirely asynchronous, meaning the dataflow graph that results will determine ordering of operations. This
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* causes problems with some resource providers, so for now we will serialize all of them. The issue
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* pulumi/pulumi#335 tracks coming up with a long-term solution here.
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*/
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let resourceChain: Promise<void> = Promise.resolve();
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let resourceChainLabel: string | undefined = undefined;
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// runAsyncResourceOp runs an asynchronous resource operation, possibly serializing it as necessary.
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function runAsyncResourceOp(label: string, callback: () => Promise<void>, serial?: boolean): void {
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// Serialize the invocation if necessary.
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if (serial === undefined) {
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serial = serialize();
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}
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const resourceOp: Promise<void> = debuggablePromise(resourceChain.then(async () => {
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if (serial) {
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resourceChainLabel = label;
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log.debug(`Resource RPC serialization requested: ${label} is current`);
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}
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return callback();
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}));
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// Ensure the process won't exit until this RPC call finishes and resolve it when appropriate.
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const done: () => void = rpcKeepAlive();
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const finalOp: Promise<void> = debuggablePromise(resourceOp.then(() => { done(); }, () => { done(); }));
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// Set up another promise that propagates the error, if any, so that it triggers unhandled rejection logic.
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resourceOp.catch((err) => Promise.reject(err));
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// If serialization is requested, wait for the prior resource operation to finish before we proceed, serializing
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// them, and make this the current resource operation so that everybody piles up on it.
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if (serial) {
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resourceChain = finalOp;
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if (resourceChainLabel) {
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log.debug(`Resource RPC serialization requested: ${label} is behind ${resourceChainLabel}`);
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}
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}
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}
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/**
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* waitForDeath loops forever. This is a hack.
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*
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* The purpose of this hack is to deal with graceful termination of the resource monitor.
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* When the engine decides that it needs to terminate, it shuts down the Log and ResourceMonitor RPC
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* endpoints. Shutting down RPC endpoints involves draining all outstanding RPCs and denying new connections.
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*
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* This is all fine for us as the language host, but we need to 1) not let the RPC that just failed due to
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* the ResourceMonitor server shutdown get displayed as an error and 2) not do any more RPCs, since they'll fail.
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*
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* We can accomplish both by just doing nothing until the engine kills us. It's ugly, but it works.
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*/
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function waitForDeath(): never {
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// tslint:disable-next-line
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while (true) {}
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}
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