如何在使用runtime: nodejs8.10的已有Serverless项目中更新Node.js至最新版本？

Hey there! Let's break down how to upgrade your Serverless project from Node.js 8.10 to the latest supported version, plus cover the general workflow you can follow for any Node.js version update in a Serverless setup.

Since Node.js 8.10 is extremely outdated (it reached end-of-life years ago), this upgrade will require extra attention to dependency compatibility—let's tackle it step by step:

• First, confirm your provider's supported latest version:
  Different Serverless platforms (like AWS Lambda, Azure Functions, or Alibaba Cloud Function Compute) have their own supported Node.js versions. For example, as of now, AWS Lambda's latest supported Node.js runtime is nodejs20.x. Double-check your provider's documentation to pick the right target version.

• Update your Serverless config:
  Open your project's serverless.yml (or serverless.ts, if you're using TypeScript) and find the runtime field. Change it from nodejs8.10 to your target version. For example:

  provider:
    name: aws
    runtime: nodejs20.x # Updated from nodejs8.10
  

• Audit and update your dependencies:
  Node.js 8.10 is so old that many of your existing dependencies likely don't support modern Node.js versions. Here's how to fix this:

  1. Back up your package.json and package-lock.json (or yarn.lock) first—better safe than sorry.
  2. Install npm-check-updates (a tool to bump dependencies to their latest compatible versions) globally: npm install -g npm-check-updates
  3. Run ncu -u in your project root—this updates all dependency versions in package.json to the latest available.
  4. Run npm install to refresh your lock file and install the updated dependencies.
  5. Check for any dependencies that explicitly don't support your target Node.js version (you might see warnings during install). For these, you'll need to either upgrade the dependency to a newer compatible version or find a maintained alternative.

• Test locally with the target Node.js version:
  Install the target Node.js version on your machine (using tools like nvm, n, or fnm makes this trivial—e.g., nvm install 20 && nvm use 20). Then:

  • Run your function code locally with serverless invoke local --function YOUR_FUNCTION_NAME to catch runtime errors.
  • Test all critical workflows: API endpoints, event triggers, database connections, etc.

• Deploy to a test environment first:
  Don't jump straight to production! Deploy the updated project to a staging/dev stage using serverless deploy --stage dev. Test the deployed functions thoroughly—check logs for errors, send test requests, and validate all functionality works as expected.

• Deploy to production:
  Once you're confident everything works in staging, deploy to your production environment. Keep an eye on production logs for the first few hours post-deployment to catch any unexpected issues.

No matter which versions you're moving between, this workflow will help you upgrade safely:

• Verify provider support: Always check your Serverless platform's docs first to ensure the target Node.js version is officially supported. Using an unsupported version will break your deployment.
• Update runtime config: In your Serverless config file (serverless.yml, template.yml, etc.), change the runtime field to the target version.
• Audit dependencies:
  • Use npm audit to check for vulnerabilities that might be worsened by the version change.
  • For outdated dependencies, use ncu -u to bump them, then run npm install.
  • If you use native modules (with C bindings), run npm rebuild to ensure they're compiled for the new Node.js version.
• Local testing:
  • Install the target Node.js version locally and switch to it.
  • Test all functions and workflows locally to catch syntax errors, deprecated API usage, or dependency issues early.
• Staged deployment: Deploy to a non-production environment first, test rigorously, and fix any issues before moving to production.
• Monitor post-deployment: After deploying to production, keep an eye on logs and performance for a short period to ensure everything runs smoothly.

Pro Tips #

• Check Node.js release notes: Look for breaking changes between your current version and the target version—for example, Node.js 14 dropped support for some APIs that were deprecated in 8.10. Adjust your code to use modern alternatives where needed.
• Update Serverless Framework: Older versions of the Serverless Framework might not support newer Node.js runtimes. Run npm update -g serverless to make sure you're using the latest framework version.

内容的提问来源于stack exchange，提问作者Daniyal Kukda