Can't get AWS Lambda function to log (text output) to CloudWatch

Question

I\'m trying to set up a Lambda function that will process a file when it\'s uploaded to an S3 bucket. I need a way to see the output of console.log when I uploa

Answer 1

It might already log, we just couldn't find the logs we expect...

e.g.

app.use(function simpleLogger (req, res, next) {
  console.info('[Logger]', req.method, req.originalUrl)
  next()
})

After performing GET /hello?world=1,

Local console: (simple and clear, nice!)

[Logger] GET /hello?world=1

CloudWatch Logs: (can you easily find the exact log below?)

START RequestId: a3552c34-f7a6-11e8-90ba-2fb886f31fb0 Version: $LATEST
2018-12-04T09:26:11.236Z  a3552c34-f7a6-11e8-90ba-2fb886f31fb0  [Logger] GET /hello?world=1
END RequestId: a3552c34-f7a6-11e8-90ba-2fb886f31fb0
REPORT RequestId: a3552c34-f7a6-11e8-90ba-2fb886f31fb0  Duration: 41.02 ms  Billed Duration: 100 ms Memory Size: 128 MB Max Memory Used: 29 MB

Conclusion: too verbose to locate the original logs.