변군이글루

slack 메시지 포맷 편집

slack 메시지

lambda function

import boto3
import json
import logging
import os

from base64 import b64decode
from urllib.request import Request, urlopen
from urllib.error import URLError, HTTPError

# The Slack channel to send a message to stored in the slackChannel environment variable
SLACK_CHANNEL = os.environ['slackChannel']
HOOK_URL = os.environ['hookUrl']

logger = logging.getLogger()
logger.setLevel(logging.INFO)


def lambda_handler(event, context):
    logger.info("Event: " + str(event))
    message = json.loads(event['Records'][0]['Sns']['Message'])
    logger.info("Message: " + str(message))

    alarm_name = message['AlarmName']
    #old_state = message['OldStateValue']
    new_state = message['NewStateValue']
    reason = message['NewStateReason']

    color = '00e200'
    username = 'CloudWatch'
    
    if new_state == 'ALARM':
        color = '#ff0000'

    slack_message = {
        'channel': SLACK_CHANNEL,
        'username': username,
        'pretext': "%s: %s" % (new_state, alarm_name),
        'color': color,
        'text': "%s state is now %s: %s" % (alarm_name, new_state, reason)
    }
    
    req = Request(HOOK_URL, json.dumps(slack_message).encode('utf-8'))
    try:
        response = urlopen(req)
        response.read()
        logger.info("Message posted to %s", slack_message['channel'])
    except HTTPError as e:
        logger.error("Request failed: %d %s", e.code, e.reason)
    except URLError as e:
        logger.error("Server connection failed: %s", e.reason)