First, get Cookiecutter. Trust me, it's awesome:

$ pip install "cookiecutter>=1.4.0"

Now run it against this repo:

$ cookiecutter https://github.com/murarisumit/cookiecutter-aws-lambda

You'll be prompted for some values. Provide them, and you'll have aws lambda function file structure created.

• Create Lambda IAM Role for execution :

  • The Lambda function requires an IAM Role to execute.
  • You can create this in the AWS IAM console or the AWS CLI.

  $ aws iam create-role --role-name lambda_basic_execution --assume-role-policy-document '{
    "Version": "2012-10-17",
    "Statement": [
      {
        "Sid": "",
        "Effect": "Allow",
        "Principal": {
          "Service": "lambda.amazonaws.com"
        },
        "Action": "sts:AssumeRole"
      }
    ]
  }'

• Create IAM Role Policy : To permit the IAM Role above to execute and put logs in CloudWatch Logs:

  aws iam put-role-policy --role-name lambda_basic_execution --policy-name lambda_basic_execution --policy-document '{
    "Version": "2012-10-17",
    "Statement": [
      {
        "Effect": "Allow",
        "Action": [
          "logs:CreateLogGroup",
          "logs:CreateLogStream",
          "logs:PutLogEvents"
        ],
        "Resource": "arn:aws:logs:*:*:*"
      }
    ]
  }'

• Create a virtualenv and install packages:

  make develop

• Activate virtualenvsource venv/bin/activate

• Run it locally

  make test

• Creating lambda function

  make create

• Update lambda function

  make update

• View and get lambda arn

  make get-fn-arn