Cloud Run + Puppeteer Deployment Guide

Hard-won lessons from deploying Puppeteer to Cloud Run. These are non-obvious gotchas that cost significant debug time.

MUST: Use gen2 Execution Environment

Cloud Run gen1 uses gVisor sandbox — blocks Linux syscalls Chrome needs to create processes. Puppeteer will hang/timeout silently.

gcloud run deploy my-service \
  --execution-environment gen2   # <-- required for Chrome/Puppeteer

Never deploy a Puppeteer service on gen1.

MUST: Install Chrome System Dependencies

node:18 base image does not include libraries Chrome needs. Missing any one of these causes launch failure.

FROM node:18

RUN apt-get update && apt-get install -y \
    ca-certificates fonts-liberation fonts-ipafont-gothic fonts-wqy-zenhei \
    libasound2 libatk-bridge2.0-0 libatk1.0-0 libcairo2 libcups2 \
    libdbus-1-3 libdrm2 libgbm1 libglib2.0-0 libgtk-3-0 libnspr4 libnss3 \
    libpango-1.0-0 libx11-xcb1 libxcb1 libxcomposite1 libxcursor1 \
    libxdamage1 libxext6 libxfixes3 libxi6 libxrandr2 libxrender1 \
    libxss1 libxtst6 xdg-utils --no-install-recommends \
    && rm -rf /var/lib/apt/lists/*

MUST: Secret Manager mount path ngoài WORKDIR

Nếu mount secret vào cùng path với WORKDIR, volume mount sẽ che toàn bộ thư mục — chỉ còn file secret, code biến mất.

# SAI — mount trùng WORKDIR /app
--set-secrets "/app/service-account.json=my-secret:latest"

# ĐÚNG — mount ra path riêng
--set-secrets "/secrets/service-account.json=my-secret:latest"

ENV GOOGLE_CREDS_PATH=/secrets/service-account.json

Windows/Git Bash warning: --set-env-vars với path Unix sẽ bị Git Bash convert thành Windows path. Set ENV trực tiếp trong Dockerfile thay vì truyền qua CLI.

Puppeteer Launch Config cho Cloud Run

const browser = await puppeteer.launch({
    headless: 'new',
    timeout: 60000,          // cold start cần thời gian — mặc định 30s không đủ
    args: [
        '--no-sandbox',
        '--disable-setuid-sandbox',
        '--disable-dev-shm-usage',   // /dev/shm nhỏ trong container
        '--single-process',
        '--no-zygote',
        '--disable-gpu',
    ],
});

waitUntil hợp lệ trong Puppeteer

Chỉ có 4 giá trị hợp lệ — 'commit' (từ Playwright) KHÔNG tồn tại:

Với trang nặng từ server overseas, dùng domcontentloaded + timeout cao + waitForFunction chờ content cụ thể:

await page.goto(url, { waitUntil: 'domcontentloaded', timeout: 120000 });
await page.waitForFunction(
    () => document.body && document.body.innerText.includes('target-text'),
    { timeout: 60000 }
);

Block Resource để Tăng Tốc

Chặn images, CSS, fonts giảm băng thông đáng kể — quan trọng khi crawl từ server overseas:

await page.setRequestInterception(true);
page.on('request', (req) => {
    if (['image', 'stylesheet', 'font', 'media'].includes(req.resourceType())) {
        req.abort();
    } else {
        req.continue();
    }
});

Recommended Cloud Run Deploy Command

gcloud run deploy my-service \
  --image gcr.io/PROJECT_ID/my-image \
  --region asia-southeast1 \
  --platform managed \
  --execution-environment gen2 \
  --memory 2Gi \
  --cpu 2 \
  --timeout 300 \
  --set-secrets "/secrets/service-account.json=my-secret:latest" \
  --allow-unauthenticated

Puppeteer cần ít nhất 2Gi RAM — Chrome dùng nhiều memory.