Node.js 10.x and 12.x for AWS Lambda
A custom runtime for AWS Lambda to execute functions in Node.js 10.x or 12.x
NB: Recent changes to this runtime regarding legacy support
Starting from nodejs10 layer version 13 and nodejs12 layer version 4, this
runtime is compatible with the legacy AWS runtimes. This means if you use
the legacy callback syntax, you may need to set
context.callbackWaitsForEmptyEventLoop = false if your Lambda is timing out.
If you use async functions, return a Promise, or use context.done(), you
shouldn't need to change anything.
Getting Started
Save as index.js:
exports.handler = async(event, context) => {
console.log(`Hi from Node.js ${process.version} on Lambda!`)
console.log(`There is ${context.getRemainingTimeInMillis()}ms remaining`)
return event
}Then bundle up into a zipfile – this is your function bundle:
zip -yr lambda.zip index.js # add node_modules too if you have anyCreate a new Lambda function and choose the custom runtime option.
Select your lambda.zip as the "Function code" and make the handler "index.handler".
Then click on Layers and choose "Add a layer", and "Provide a layer version ARN" and enter the following ARN:
arn:aws:lambda:us-east-1:553035198032:layer:nodejs10:17
Or use this link and pick your function from the "Function name" auto-suggest.
Then save your lambda and test it with a test event!
Current Version ARNs
| Node.js version | ARN |
|---|---|
| 10.17.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs10:18 |
| 12.13.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs12:19 |
Previous Version ARNs
| Node.js version | ARN |
|---|---|
| 10.16.3 | arn:aws:lambda:<region>:553035198032:layer:nodejs10:17 |
| 12.12.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs12:18 |
| 12.11.1 | arn:aws:lambda:<region>:553035198032:layer:nodejs12:17 |
| 12.11.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs12:16 |
| 12.10.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs12:15 |
| 12.9.1 | arn:aws:lambda:<region>:553035198032:layer:nodejs12:14 |
| 12.9.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs12:13 |
| 12.8.1 | arn:aws:lambda:<region>:553035198032:layer:nodejs12:12 |
| 10.16.2 | arn:aws:lambda:<region>:553035198032:layer:nodejs10:16 |
| 12.8.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs12:11 |
| 12.7.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs12:10 |
| 10.16.1 | arn:aws:lambda:<region>:553035198032:layer:nodejs10:15 |
| 10.16.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs10:14 |
| 12.6.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs12:9 |
| 12.5.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs12:8 |
| 12.4.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs12:7 |
| 12.3.1 | arn:aws:lambda:<region>:553035198032:layer:nodejs12:6 |
| 10.15.3 | arn:aws:lambda:<region>:553035198032:layer:nodejs10:13 |
| 12.3.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs12:5 |
| 12.2.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs12:4 |
| 12.1.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs12:2 |
| 12.0.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs12:1 |
| 11.14.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs11:17 |
| 11.13.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs11:16 |
| 11.12.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs11:13 |
| 11.11.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs11:11 |
| 11.10.1 | arn:aws:lambda:<region>:553035198032:layer:nodejs11:10 |
| 10.15.2 | arn:aws:lambda:<region>:553035198032:layer:nodejs10:7 |
| 10.15.1 | arn:aws:lambda:<region>:553035198032:layer:nodejs10:6 |
| 11.10.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs11:9 |
| 11.9.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs11:8 |
| 11.8.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs11:7 |
| 10.15.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs10:5 |
| 11.7.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs11:6 |
| 11.6.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs11:5 |
| 10.14.2 | arn:aws:lambda:<region>:553035198032:layer:nodejs10:3 |
| 11.4.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs11:4 |
| 10.14.1 | arn:aws:lambda:<region>:553035198032:layer:nodejs10:1 |
| 11.3.0 | arn:aws:lambda:<region>:553035198032:layer:nodejs11:1 |
Things to be aware of
- This is a no-batteries-included runtime – you'll need to zip up any
node_modulesdependencies, includingaws-sdkwith your lambda function - It does not monkeypatch
console.log,console.error, etc functions to add extra timestamps and request IDs to each line you log as the official runtimes do. I believe this leads to fewer surprises and cleaner logs that are easier to parse by various tools – but if you're relying on this behaviour you'll need to add these fields yourself. - Cold start overhead of ~240ms for Node.js 10.x and ~260ms for 12.x – this is due to Node.js' increasingly slow startup time, but they're working on it!