AWS Lambda Function to Post an alert to a Slack channel every time Cloudwatch triggers the SNS-Backed Lambda

AWS-to-Slack.py

import logging
from json import dumps
from os import environ
from urllib3 import PoolManager

logging.getLogger().setLevel(logging.INFO)


def post_to_slack(event, context):
    slack_channel = environ.get("SLACK_NET_CHANNEL")

    logging.info("Event: " + str(event))
    http = PoolManager()

    slack_message = {
        "text": "Sample message from Lambda - lambdaSlackNetAlerts - Network Alert - Traffic has exceeded your defined threshold!!"
    }

    response = http.request(
        "POST",
        slack_channel,
        body=dumps(slack_message),
        headers={"Content-Type": "application/json"},
    )

    res_text = response.data.decode("utf-8")

    logging.info("Message posted to: #network-aws-alerts")
    logging.info(f"Slack's Response:{res_text.upper()} - {response.status}")

    if response.status == 200:
        return {"statusCode": 200, "body": dumps("Lambda has executed correctly!")}

    return {
        "statusCode": f"{response.status}",
        "body": dumps(f"Lambda Failed - Reason: {res_text}"),
    }