662 lines
21 KiB
TypeScript
662 lines
21 KiB
TypeScript
import { createHash } from "node:crypto";
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import { rm } from "node:fs/promises";
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import { join } from "node:path";
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import {
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BUILD_PROTOCOL_VERSION,
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assertSha256Digest,
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type BuildEvent,
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type BuildRequest,
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type BuildStatus,
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type Sha256Digest,
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} from "../shared/build-protocol";
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import { createBuildJob, type KubernetesJob } from "./build-job";
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import {
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BUILD_RECORD_API_VERSION,
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BuildStoreConflictError,
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type BuildRecord,
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type BuildStore,
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type UploadRecord,
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} from "./build-store";
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import {
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materializeWorkspace,
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parseWorkspaceManifest,
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type MaterializeCas,
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} from "./materialize";
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import { parseImageReference, resolveRegistryDigest } from "./registry";
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export const DEFAULT_MAX_BLOB_BYTES = 1024 * 1024 * 1024;
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export const DEFAULT_MAX_UPLOAD_CHUNK_BYTES = 8 * 1024 * 1024;
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export const DEFAULT_MAX_LOG_BYTES = 1024 * 1024;
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export interface BuildCas extends MaterializeCas {
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put(data: Uint8Array, expected?: Sha256Digest): Promise<Sha256Digest>;
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}
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export type JobPhase = "queued" | "running" | "succeeded" | "failed";
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export interface BuildJobObservation {
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phase: JobPhase;
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startedAt?: string;
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finishedAt?: string;
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error?: string;
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}
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export interface BuildKubernetesOperations {
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createJob(job: KubernetesJob): Promise<void>;
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getJob(
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namespace: string,
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name: string,
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): Promise<BuildJobObservation | undefined>;
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getJobLogs(namespace: string, name: string): Promise<string | Uint8Array>;
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deleteJob(namespace: string, name: string): Promise<void>;
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}
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export interface BuildControllerOptions {
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cas: BuildCas;
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store: BuildStore;
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kubernetes: BuildKubernetesOperations;
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namespace: string;
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workspaceRoot: string;
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workspaceClaimName: string;
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cacheImage: string | ((request: BuildRequest) => string);
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imageName?: (request: BuildRequest) => string;
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pushImage?: (request: BuildRequest) => string;
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pushRegistryInsecure?: boolean;
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cacheRegistryInsecure?: boolean;
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buildkitImage?: string;
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serviceAccountName?: string;
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registrySecretName?: string;
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nodeSelector?: Record<string, string>;
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tolerations?: Array<Record<string, unknown>>;
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maxBlobBytes?: number;
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maxUploadChunkBytes?: number;
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maxLogBytes?: number;
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now?: () => Date;
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materialize?: typeof materializeWorkspace;
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resolveDigest?: typeof resolveRegistryDigest;
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}
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export class BuildValidationError extends Error {
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readonly code = "BUILD_INVALID";
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}
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export class BuildNotFoundError extends Error {
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readonly code = "BUILD_NOT_FOUND";
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}
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export class BuildConflictError extends Error {
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readonly code = "BUILD_CONFLICT";
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}
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export type SnapshotNegotiation = {
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workspace: Sha256Digest;
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missing: Sha256Digest[];
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ready: boolean;
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};
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export type UploadProgress = {
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digest: Sha256Digest;
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size: number;
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offset: number;
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complete: boolean;
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};
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export function buildImageName(
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registry: string,
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project: string,
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service: string,
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): string {
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const valid = (value: string) =>
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value.length <= 63 && /^[a-z0-9](?:[-a-z0-9]*[a-z0-9])?$/.test(value);
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if (!valid(project) || !valid(service))
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throw new BuildValidationError(
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"Build project and service must be valid Kubernetes names",
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);
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const owner = registry.replace(/\/+$/, "");
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if (!owner) throw new BuildValidationError("Build registry is required");
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return `${owner}/kuber/${project}-${service}:latest`;
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}
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function clone<T>(value: T): T {
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return structuredClone(value);
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}
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function requestFingerprint(request: BuildRequest): string {
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return createHash("sha256").update(JSON.stringify(request)).digest("hex");
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}
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function jobWorkspaceSubPath(workspaceRoot: string, subPath: string): string {
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const segments = workspaceRoot.split("/").filter(Boolean);
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const prefix = segments.at(-1);
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if (!prefix || prefix === ".") return subPath;
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return subPath ? `${prefix}/${subPath}` : prefix;
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}
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function validateRequest(request: BuildRequest): void {
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if (request.version !== BUILD_PROTOCOL_VERSION)
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throw new BuildValidationError("Unsupported build protocol version");
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if (!request.id || !request.project || !request.service)
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throw new BuildValidationError(
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"Build ID, project, and service are required",
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);
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if (Buffer.byteLength(request.id) > 256)
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throw new BuildValidationError("Build ID is too long");
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if (!request.spec || !["amd64", "arm64"].includes(request.spec.architecture))
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throw new BuildValidationError("Invalid build architecture");
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if (
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!Array.isArray(request.spec.buildArgs) ||
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!request.spec.buildArgs.every((value) => typeof value === "string")
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) {
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throw new BuildValidationError("Build arguments must be strings");
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}
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assertSha256Digest(request.spec.workspace);
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parseImageReference(request.spec.image);
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}
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function recordStatus(record: BuildRecord): BuildStatus {
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const {
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version,
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id,
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state,
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createdAt,
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startedAt,
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finishedAt,
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digest,
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error,
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} = record.status;
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return {
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version,
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id,
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state,
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createdAt,
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...(startedAt && { startedAt }),
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...(finishedAt && { finishedAt }),
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...(digest && { digest }),
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...(error && { error }),
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};
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}
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export class BuildController {
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private readonly now: () => Date;
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private readonly maxBlobBytes: number;
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private readonly maxUploadChunkBytes: number;
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private readonly maxLogBytes: number;
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private readonly materializer: typeof materializeWorkspace;
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private readonly digestResolver: typeof resolveRegistryDigest;
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constructor(private readonly options: BuildControllerOptions) {
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this.now = options.now ?? (() => new Date());
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this.maxBlobBytes = options.maxBlobBytes ?? DEFAULT_MAX_BLOB_BYTES;
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this.maxUploadChunkBytes =
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options.maxUploadChunkBytes ?? DEFAULT_MAX_UPLOAD_CHUNK_BYTES;
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this.maxLogBytes = options.maxLogBytes ?? DEFAULT_MAX_LOG_BYTES;
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this.materializer = options.materialize ?? materializeWorkspace;
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this.digestResolver = options.resolveDigest ?? resolveRegistryDigest;
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}
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async negotiateSnapshot(
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workspace: Sha256Digest,
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): Promise<SnapshotNegotiation> {
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assertSha256Digest(workspace);
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if (!(await this.options.cas.has(workspace)))
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return { workspace, missing: [workspace], ready: false };
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const manifest = parseWorkspaceManifest(
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await this.options.cas.get(workspace),
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);
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const missing: Sha256Digest[] = [];
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const seen = new Set<Sha256Digest>();
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for (const file of manifest.files) {
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if (!seen.has(file.digest) && !(await this.options.cas.has(file.digest)))
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missing.push(file.digest);
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seen.add(file.digest);
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}
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return { workspace, missing, ready: missing.length === 0 };
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}
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async beginBlobUpload(
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digest: Sha256Digest,
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size: number,
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): Promise<UploadProgress> {
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assertSha256Digest(digest);
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if (!Number.isSafeInteger(size) || size < 0 || size > this.maxBlobBytes)
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throw new BuildValidationError(
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`Blob size must be between 0 and ${this.maxBlobBytes}`,
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);
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if (await this.options.cas.has(digest)) {
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const actualSize = (await this.options.cas.get(digest)).byteLength;
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if (actualSize !== size)
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throw new BuildConflictError(
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"Blob size does not match content already in CAS",
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);
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return { digest, size, offset: size, complete: true };
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}
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const current = await this.options.store.getUpload(digest);
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if (current) {
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if (current.spec.size !== size)
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throw new BuildConflictError(
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"Upload size does not match the existing upload",
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);
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return { digest, size, offset: current.status.offset, complete: false };
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}
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const timestamp = this.now().toISOString();
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const upload: UploadRecord = {
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apiVersion: BUILD_RECORD_API_VERSION,
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kind: "BuildUpload",
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metadata: {
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name: digest.replace(":", "-"),
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resourceVersion: "1",
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creationTimestamp: timestamp,
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},
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spec: { digest, size },
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status: { offset: 0, data: new Uint8Array() },
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};
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const stored = await this.options.store.createUpload(upload);
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if (stored.spec.size !== size)
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throw new BuildConflictError(
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"Upload size does not match the existing upload",
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);
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return { digest, size, offset: stored.status.offset, complete: false };
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}
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async uploadBlobChunk(
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digest: Sha256Digest,
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offset: number,
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chunk: Uint8Array,
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): Promise<UploadProgress> {
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assertSha256Digest(digest);
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if (
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!(chunk instanceof Uint8Array) ||
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chunk.byteLength > this.maxUploadChunkBytes
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)
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throw new BuildValidationError(
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`Upload chunks may not exceed ${this.maxUploadChunkBytes} bytes`,
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);
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const current = await this.options.store.getUpload(digest);
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if (!current) {
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if (await this.options.cas.has(digest)) {
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const size = (await this.options.cas.get(digest)).byteLength;
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return { digest, size, offset: size, complete: true };
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}
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throw new BuildNotFoundError("Blob upload was not initialized");
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}
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if (offset !== current.status.offset)
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throw new BuildConflictError(
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`Upload offset mismatch; expected ${current.status.offset}`,
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);
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const nextOffset = offset + chunk.byteLength;
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if (nextOffset > current.spec.size)
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throw new BuildValidationError("Upload exceeds the declared blob size");
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const data = new Uint8Array(nextOffset);
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data.set(current.status.data);
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data.set(chunk, offset);
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const next = clone(current);
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next.metadata.resourceVersion = String(
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Number(current.metadata.resourceVersion) + 1,
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);
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next.status = { offset: nextOffset, data };
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await this.options.store.replaceUpload(
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next,
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current.metadata.resourceVersion,
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);
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return {
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digest,
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size: current.spec.size,
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offset: nextOffset,
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complete: false,
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};
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}
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async completeBlobUpload(digest: Sha256Digest): Promise<UploadProgress> {
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assertSha256Digest(digest);
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const current = await this.options.store.getUpload(digest);
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if (!current) {
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if (await this.options.cas.has(digest)) {
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const size = (await this.options.cas.get(digest)).byteLength;
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return { digest, size, offset: size, complete: true };
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}
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throw new BuildNotFoundError("Blob upload was not initialized");
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}
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if (
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current.status.offset !== current.spec.size ||
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current.status.data.byteLength !== current.spec.size
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) {
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throw new BuildConflictError(
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`Blob upload is incomplete at offset ${current.status.offset}`,
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);
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}
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try {
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await this.options.cas.put(current.status.data, digest);
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} catch (error) {
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throw new BuildValidationError(
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error instanceof Error ? error.message : String(error),
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);
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}
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await this.options.store.deleteUpload(digest);
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return {
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digest,
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size: current.spec.size,
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offset: current.spec.size,
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complete: true,
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};
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}
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async submitBuild(request: BuildRequest): Promise<BuildStatus> {
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request = clone(request);
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if (this.options.imageName)
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request.spec.image = this.options.imageName(request);
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validateRequest(request);
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const existing = await this.options.store.getBuild(request.id);
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if (existing) {
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if (
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requestFingerprint(existing.spec.request) !==
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requestFingerprint(request)
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)
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throw new BuildConflictError(
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"Build ID was already used for a different request",
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);
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return recordStatus(existing);
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}
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const snapshot = await this.negotiateSnapshot(request.spec.workspace);
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if (!snapshot.ready)
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throw new BuildConflictError(
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`Workspace snapshot is incomplete: ${snapshot.missing.join(", ")}`,
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);
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const createdAt = this.now().toISOString();
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const hash = createHash("sha256")
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.update(request.id)
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.digest("hex")
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.slice(0, 24);
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const jobName = `kuber-build-${hash}`;
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const imageKey = `${request.project}\0${request.service}\0${request.spec.image}`;
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const initial: BuildStatus = {
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version: BUILD_PROTOCOL_VERSION,
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id: request.id,
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state: "queued",
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createdAt,
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};
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const record: BuildRecord = {
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apiVersion: BUILD_RECORD_API_VERSION,
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kind: "BuildRecord",
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metadata: {
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name: request.id,
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resourceVersion: "1",
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creationTimestamp: createdAt,
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labels: { project: request.project, service: request.service },
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},
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spec: {
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request: clone(request),
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imageKey,
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jobName,
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workspaceSubPath: jobName,
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},
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status: {
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...initial,
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logBytes: 0,
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logOffset: 0,
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nextSequence: 1,
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events: [{ type: "status", status: initial }],
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},
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};
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let stored: BuildRecord;
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try {
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const result = await this.options.store.createBuild(record);
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stored = result.record;
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if (!result.created) {
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if (
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requestFingerprint(stored.spec.request) !==
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requestFingerprint(request)
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)
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throw new BuildConflictError(
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"Build ID was already used for a different request",
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);
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return recordStatus(stored);
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}
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} catch (error) {
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if (error instanceof BuildStoreConflictError)
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throw new BuildConflictError(error.message);
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throw error;
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}
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try {
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await this.materializer(
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this.options.cas,
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request.spec.workspace,
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join(this.options.workspaceRoot, stored.spec.workspaceSubPath),
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);
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const cacheImage =
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typeof this.options.cacheImage === "function"
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? this.options.cacheImage(request)
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: this.options.cacheImage;
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const pushImage = this.options.pushImage
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? this.options.pushImage(request)
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: request.spec.image;
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const job = createBuildJob({
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name: jobName,
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namespace: this.options.namespace,
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spec: request.spec,
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workspaceClaimName: this.options.workspaceClaimName,
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workspaceSubPath: jobWorkspaceSubPath(
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this.options.workspaceRoot,
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stored.spec.workspaceSubPath,
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),
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cacheImage,
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pushImage,
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pushRegistryInsecure: this.options.pushRegistryInsecure,
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cacheRegistryInsecure:
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this.options.cacheRegistryInsecure ??
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this.options.pushRegistryInsecure,
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buildkitImage: this.options.buildkitImage,
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serviceAccountName: this.options.serviceAccountName,
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registrySecretName: this.options.registrySecretName,
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nodeSelector: this.options.nodeSelector,
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tolerations: this.options.tolerations,
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});
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await this.options.kubernetes.createJob(job);
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await this.updateBuild(stored, (next) => {
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next.status.jobCreated = true;
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});
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return initial;
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} catch (error) {
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await this.failBuild(
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stored.metadata.name,
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error instanceof Error ? error.message : String(error),
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);
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throw error;
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}
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}
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async getBuildStatus(id: string): Promise<BuildStatus> {
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const record = await this.requireBuild(id);
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return recordStatus(record);
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}
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async getBuildEvents(id: string, afterSequence = 0): Promise<BuildEvent[]> {
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if (!Number.isSafeInteger(afterSequence) || afterSequence < 0)
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throw new BuildValidationError(
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"Event sequence must be a non-negative integer",
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);
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const record = await this.requireBuild(id);
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return clone(
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record.status.events.filter(
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(event) => event.type === "status" || event.sequence > afterSequence,
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),
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);
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}
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async reconcileBuild(id: string): Promise<BuildStatus> {
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let record = await this.requireBuild(id);
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if (record.status.state === "succeeded" || record.status.state === "failed")
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return recordStatus(record);
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if (record.status.jobCreated) record = await this.captureLogs(record);
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const observation = await this.options.kubernetes.getJob(
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this.options.namespace,
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record.spec.jobName,
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);
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if (!observation) return recordStatus(record);
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if (observation.phase === "running" && record.status.state === "queued") {
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record = await this.setState(record, "running", {
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startedAt: observation.startedAt ?? this.now().toISOString(),
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});
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} else if (observation.phase === "failed") {
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record = await this.setState(record, "failed", {
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startedAt: record.status.startedAt ?? observation.startedAt,
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finishedAt: observation.finishedAt ?? this.now().toISOString(),
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error: observation.error ?? "BuildKit Job failed",
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});
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} else if (observation.phase === "succeeded") {
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try {
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const digest = await this.digestResolver(
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record.spec.request.spec.image,
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);
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assertSha256Digest(digest);
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record = await this.setState(record, "succeeded", {
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startedAt: record.status.startedAt ?? observation.startedAt,
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finishedAt: observation.finishedAt ?? this.now().toISOString(),
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digest,
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});
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} catch (error) {
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record = await this.setState(record, "failed", {
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finishedAt: this.now().toISOString(),
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error: `Unable to resolve pushed image digest: ${error instanceof Error ? error.message : String(error)}`,
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});
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}
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}
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return recordStatus(record);
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}
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async cancelBuild(id: string): Promise<BuildStatus> {
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|
const record = await this.requireBuild(id);
|
|
if (record.status.state === "succeeded" || record.status.state === "failed")
|
|
return recordStatus(record);
|
|
if (record.status.jobCreated)
|
|
await this.options.kubernetes.deleteJob(
|
|
this.options.namespace,
|
|
record.spec.jobName,
|
|
);
|
|
const next = await this.setState(record, "failed", {
|
|
finishedAt: this.now().toISOString(),
|
|
error: "Build cancelled",
|
|
cancelled: true,
|
|
});
|
|
return recordStatus(next);
|
|
}
|
|
|
|
async cleanupBuild(id: string): Promise<void> {
|
|
const record = await this.requireBuild(id);
|
|
if (record.status.state !== "succeeded" && record.status.state !== "failed")
|
|
throw new BuildConflictError("An active build cannot be cleaned up");
|
|
if (record.status.jobCreated)
|
|
await this.options.kubernetes.deleteJob(
|
|
this.options.namespace,
|
|
record.spec.jobName,
|
|
);
|
|
await rm(join(this.options.workspaceRoot, record.spec.workspaceSubPath), {
|
|
recursive: true,
|
|
force: true,
|
|
});
|
|
}
|
|
|
|
async getBuildResult(
|
|
id: string,
|
|
): Promise<{ image: string; digest: Sha256Digest; reference: string }> {
|
|
const record = await this.requireBuild(id);
|
|
if (record.status.state !== "succeeded" || !record.status.digest)
|
|
throw new BuildConflictError("Build has no immutable image result");
|
|
const parsed = parseImageReference(record.spec.request.spec.image);
|
|
const image = `${parsed.registry}/${parsed.repository}`;
|
|
return {
|
|
image,
|
|
digest: record.status.digest,
|
|
reference: `${image}@${record.status.digest}`,
|
|
};
|
|
}
|
|
|
|
private async requireBuild(id: string): Promise<BuildRecord> {
|
|
const record = await this.options.store.getBuild(id);
|
|
if (!record) throw new BuildNotFoundError(`Build '${id}' not found`);
|
|
return record;
|
|
}
|
|
|
|
private async updateBuild(
|
|
record: BuildRecord,
|
|
change: (next: BuildRecord) => void,
|
|
): Promise<BuildRecord> {
|
|
const next = clone(record);
|
|
next.metadata.resourceVersion = String(
|
|
Number(record.metadata.resourceVersion) + 1,
|
|
);
|
|
change(next);
|
|
await this.options.store.replaceBuild(
|
|
next,
|
|
record.metadata.resourceVersion,
|
|
);
|
|
return this.requireBuild(record.metadata.name);
|
|
}
|
|
|
|
private async setState(
|
|
record: BuildRecord,
|
|
state: BuildStatus["state"],
|
|
values: Partial<BuildRecord["status"]>,
|
|
): Promise<BuildRecord> {
|
|
if (record.status.state === state && state === "running") return record;
|
|
return this.updateBuild(record, (next) => {
|
|
Object.assign(next.status, values, { state });
|
|
next.status.events.push({ type: "status", status: recordStatus(next) });
|
|
});
|
|
}
|
|
|
|
private async failBuild(id: string, message: string): Promise<void> {
|
|
const current = await this.requireBuild(id);
|
|
if (
|
|
current.status.state === "succeeded" ||
|
|
current.status.state === "failed"
|
|
)
|
|
return;
|
|
await this.setState(current, "failed", {
|
|
finishedAt: this.now().toISOString(),
|
|
error: message,
|
|
});
|
|
}
|
|
|
|
private async captureLogs(record: BuildRecord): Promise<BuildRecord> {
|
|
let raw: string | Uint8Array;
|
|
try {
|
|
raw = await this.options.kubernetes.getJobLogs(
|
|
this.options.namespace,
|
|
record.spec.jobName,
|
|
);
|
|
} catch {
|
|
return record;
|
|
}
|
|
const bytes = typeof raw === "string" ? Buffer.from(raw) : Buffer.from(raw);
|
|
const offset =
|
|
bytes.byteLength < record.status.logOffset ? 0 : record.status.logOffset;
|
|
if (bytes.byteLength === offset) return record;
|
|
const delta = bytes.subarray(offset);
|
|
return this.updateBuild(record, (next) => {
|
|
next.status.logOffset = bytes.byteLength;
|
|
for (const message of delta
|
|
.toString("utf8")
|
|
.split(/(?<=\n)/)
|
|
.filter(Boolean)) {
|
|
const event: BuildEvent = {
|
|
type: "log",
|
|
id: record.metadata.name,
|
|
sequence: next.status.nextSequence++,
|
|
message,
|
|
};
|
|
next.status.events.push(event);
|
|
next.status.logBytes += Buffer.byteLength(message);
|
|
}
|
|
while (next.status.logBytes > this.maxLogBytes) {
|
|
const index = next.status.events.findIndex(
|
|
(event) => event.type === "log",
|
|
);
|
|
if (index === -1) break;
|
|
const [removed] = next.status.events.splice(index, 1);
|
|
if (removed?.type === "log")
|
|
next.status.logBytes -= Buffer.byteLength(removed.message);
|
|
}
|
|
});
|
|
}
|
|
}
|