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

As other answers state you need to give lambda permission to post logs to cloud watch logs. AWS had provided AWSLambdaExecute policy just for that. It's json is -

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "logs:*"
            ],
            "Resource": "arn:aws:logs:*:*:*"
        },
        {
            "Effect": "Allow",
            "Action": [
                "s3:GetObject",
                "s3:PutObject"
            ],
            "Resource": "arn:aws:s3:::*"
        }
    ]
}

You can add this policy in your role which is assigned to your lambda and you should start seeing the logs.

NOTE: It also has S3 read/write access. If you do not want it you can create a custom policy with just the logs part.