mirror of
https://github.com/heygen-com/hyperframes.git
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James Russo
5bf61d6df0
* feat(aws-lambda): support plan protocol v2 * fix(aws-lambda): align SAM v2 terminal errors
212 lines
9.5 KiB
Markdown
212 lines
9.5 KiB
Markdown
# @hyperframes/aws-lambda
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AWS Lambda adapter for HyperFrames distributed rendering. Ships three
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things together:
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1. The **Lambda handler** that wraps the OSS `plan` / `renderChunk` /
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`assemble` primitives behind a single dispatch boundary Step Functions
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can drive (`src/handler.ts`).
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2. A **client-side SDK** — `renderToLambda`, `getRenderProgress`,
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`deploySite`, plus `validateDistributedRenderConfig` and
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`computeRenderCost` (`src/sdk/`).
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3. An **`aws-cdk-lib` L2 construct** (`HyperframesRenderStack`) that
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provisions the same topology as `examples/aws-lambda/template.yaml`
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inside an adopter's own CDK app (`src/cdk/`).
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The handler ZIP and the SAM template still drive a maintainer-run real-AWS
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smoke flow; the SDK + CDK are the supported public surface for adopters.
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## Architecture
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```
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┌──────────────────────────────────────────────────────────────────┐
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│ Step Functions state machine │
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│ Plan → Map(N) RenderChunk → Assemble │
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└──────────────────────────────────────────────────────────────────┘
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│ dispatches by event.Action
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▼
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┌──────────────────────────────────────────────────────────────────┐
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│ One Lambda function (this package's `dist/handler.zip`) │
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│ handler.mjs │
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│ ├─ Action="plan" → @hyperframes/producer/distributed │
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│ ├─ Action="renderChunk" → @hyperframes/producer/distributed │
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│ └─ Action="assemble" → @hyperframes/producer/distributed │
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│ bin/ffmpeg — ffmpeg-static │
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│ node_modules/@sparticuz/chromium/ — Lambda-optimised Chromium │
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└──────────────────────────────────────────────────────────────────┘
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│ pure functions over local paths
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▼
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┌──────────────────────────────────────────────────────────────────┐
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│ S3 bucket — v1 plan tar or v2 manifest/blobs + chunks + output │
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└──────────────────────────────────────────────────────────────────┘
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```
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The handler downloads inputs from S3 into `/tmp`, calls the OSS primitive,
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uploads outputs back to S3, and returns a small JSON result that fits
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inside Step Functions' history budget (under 200 bytes per chunk).
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### Plan transport selection
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`renderToLambda` defaults to the existing monolithic v1 plan transport.
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Plan v2 is an explicit whole-render opt-in:
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```ts
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await renderToLambda({
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// ...bucket, state machine, project, and config...
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planProtocol: "v2",
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});
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```
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V2 never overloads `PlanS3Uri`. The planner returns
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`PlanV2ManifestS3Uri` and `PlanV2ArtifactS3Prefix`; chunk workers fetch
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only manifest-selected chunk artifacts, while the assembler fetches its
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own metadata and audio subset. Blobs are immutable SHA-256-addressed
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objects, verified on upload and download, and the manifest is published
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last. Unknown protocols and digest mismatches are terminal Step Functions
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errors. Omit the selector—or use `"v1"`—to retain the prior wire contract.
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## Chrome runtime
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The package supports two Chromium sources:
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| Source | Default | Size | When to pick it |
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| ------------------------------- | ------- | ------------------ | --------------------------------------------------------------------------------------------------------------------- |
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| `@sparticuz/chromium` | yes | ~70 MiB compressed | Lambda. Decompresses into `/tmp` at runtime; the rest of the ecosystem already uses it for headless-Chrome-in-Lambda. |
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| Bundled `chrome-headless-shell` | no | ~140 MiB | Fallback. Used if `@sparticuz/chromium` ever drops `HeadlessExperimental.beginFrame` support. |
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Pick the source at build time:
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```bash
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bun run --cwd packages/aws-lambda build:zip
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bun run --cwd packages/aws-lambda build:zip -- --source=chrome-headless-shell
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```
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The handler reads `HYPERFRAMES_LAMBDA_CHROME_SOURCE` at boot. The build
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script sets that env var via Lambda function configuration in
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`examples/aws-lambda/template.yaml`.
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## BeginFrame regression guard
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HyperFrames' renderer drives Chrome via the CDP
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`HeadlessExperimental.beginFrame` command — same path the K8s deploy uses.
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The Lambda adapter assumes that `@sparticuz/chromium`'s
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chrome-headless-shell build honours BeginFrame. To prove it (and re-prove
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it on every release), the package ships a Docker probe:
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```bash
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# Build the Lambda-like container and run the probe.
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bun run --cwd packages/aws-lambda probe:beginframe:docker
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```
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The probe boots `@sparticuz/chromium` inside
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`public.ecr.aws/lambda/nodejs:22` and asserts CDP `beginFrame` with
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`screenshot: true` returns a PNG buffer. Exit code 0 = green; non-zero =
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fall back to bundling chrome-headless-shell directly via `--source=chrome-headless-shell`.
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## Building the ZIP
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```bash
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bun install # at the monorepo root
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bun run --cwd packages/aws-lambda build:zip # → packages/aws-lambda/dist/handler.zip
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bun run --cwd packages/aws-lambda verify:zip-size # CI gate
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```
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The build script bundles `src/handler.ts` via esbuild, stages
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`@sparticuz/chromium` and `puppeteer-core` under `node_modules/`, copies
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ffmpeg-static into `bin/`, and zips the result. The unzipped layout is
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designed to extract cleanly into Lambda's `/var/task/`.
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`verify:zip-size` enforces:
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- Unzipped ≤ 248 MiB (in-house budget; Lambda hard ceiling is 250 MiB unzipped — AWS docs label this "250 MB" but use binary mebibytes)
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- Zipped ≤ 150 MiB (in-house budget; Lambda has no hard zipped cap for S3-deployed functions)
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CI fails the PR if either is exceeded.
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## Running tests
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```bash
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bun run --cwd packages/aws-lambda test # unit tests (no Chrome)
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bun run --cwd packages/aws-lambda probe:beginframe # local probe (Linux only)
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```
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## Using the SDK
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After deploying the stack (via the SAM template, CDK construct below, or
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your own CFN of choice), drive renders from Node:
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```ts
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import { deploySite, getRenderProgress, renderToLambda } from "@hyperframes/aws-lambda";
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// One-time upload per project version.
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const site = await deploySite({
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projectDir: "./my-composition",
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bucketName: "hyperframes-render-bucket",
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});
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// Start a render. Returns immediately — does NOT poll.
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const handle = await renderToLambda({
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siteHandle: site,
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bucketName: site.bucketName,
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stateMachineArn: "arn:aws:states:us-east-1:123:stateMachine:hyperframes-render",
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config: {
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fps: 30,
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width: 1920,
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height: 1080,
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format: "mp4",
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chunkSize: 240,
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maxParallelChunks: 16,
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runtimeCap: "lambda",
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},
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});
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// Poll progress + cost on your own cadence.
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const progress = await getRenderProgress({ executionArn: handle.executionArn });
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console.log(progress.overallProgress, progress.costs.displayCost);
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if (progress.status === "SUCCEEDED" && progress.outputFile) {
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console.log("Render landed at", progress.outputFile.s3Uri);
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}
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```
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`renderToLambda` validates the config client-side via
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`validateDistributedRenderConfig` and throws a typed `InvalidConfigError`
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before the Step Functions execution starts, so shape errors surface
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synchronously instead of as opaque `ExecutionFailed` results.
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`getRenderProgress` reports an approximate per-render cost
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(`accruedSoFarUsd` plus a formatted `displayCost`) derived from Lambda
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billed-duration × memory × the us-east-1 on-demand rate plus the Step
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Functions transition price. The math is documented in
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`src/sdk/costAccounting.ts`; numbers are best-effort and exclude S3
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transfer.
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## Using the CDK construct
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```ts
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import { App, Stack } from "aws-cdk-lib";
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import { HyperframesRenderStack } from "@hyperframes/aws-lambda/cdk";
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const app = new App();
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const stack = new Stack(app, "MyApp");
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const render = new HyperframesRenderStack(stack, "Render", {
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// optional: reservedConcurrency: 8,
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// optional: lambdaMemoryMb: 10240,
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// optional: chromeSource: "sparticuz",
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});
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// Re-export so an adopter app can wire dashboards / SNS topics.
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new CfnOutput(stack, "RenderBucketName", { value: render.bucket.bucketName });
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new CfnOutput(stack, "StateMachineArn", { value: render.stateMachine.stateMachineArn });
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```
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`aws-cdk-lib` and `constructs` are **optional peer dependencies**: SDK-only
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consumers don't pull them at runtime. The construct itself imports from
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`@hyperframes/aws-lambda/cdk`.
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## What's still ahead
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- `hyperframes lambda` CLI (deploy / sites create / render / progress / destroy) — PR 6.5.
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- IAM bootstrap subcommand (`policies role | user | validate`) — PR 6.9.
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- Lambda-local regression harness (`--mode=lambda-local`) — PR 6.6.
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- Adopter-facing migration guide — PR 6.8.
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