_serverless-python-sample.md

python-serverless-sample

handler.py

import json
from datadog import initialize, ThreadStats

def hello(event, context):
    initialize()
    stats = ThreadStats()
    stats.start()

    body = {
        "message": "Go Serverless v1.0! Your function executed successfully!",
        "input": event
    }

    stats.increment('pro.serverless.lambda_python_sample.prod')

    response = {
        "statusCode": 200,
        "body": json.dumps(body["message"])
    }

    return response

package.json

{
  "name": "serverless-python-sample",
  "description": "",
  "version": "0.1.0",
  "dependencies": {},
  "devDependencies": {
    "serverless-offline-python": "^3.21.2",
    "serverless-python-requirements": "^4.0.4"
  }
}

requirements.txt

datadog

serverless.yml

service: serverless-python-sample

# sls version
frameworkVersion: ">=1.27.0 < 2.0.0"

provider:
  name: aws
  runtime: python3.6
  stage: local
  region: us-east-1
  iamRoleStatements:
  - Effect: "Allow"
    Action:
      - ssm:GetParameter
    Resource:
      - "arn:aws:ssm:us-east-1:123:parameter/pro/datadog-api-key"
      - "arn:aws:ssm:us-east-1:123:parameter/pro/datadog-app-key"
  - Effect: "Allow"
    Action:
      - kms:Decrypt
    Resource: "arn:aws:kms:us-east-1:123:key/321"

plugins:
  - serverless-offline-python
  - serverless-python-requirements
custom:
  stage: "${opt:stage, self:provider.stage}"
  prod:
    events:
      - http:
          method: GET
          path: /hello
  local:
    events:
      - http:
          method: GET
          path: /hello
  serverless-offline:
    port: 4000
functions:
  hello:
    handler: handler.hello
    environment:
      DATADOG_API_KEY: ${ssm:/pro/datadog-api-key~true}
      DATADOG_APP_KEY: ${ssm:/pro/datadog-app-key~true}
    events: ${self:custom.${self:custom.stage}.events}