Notify Slack if people leave EC2 test instances running

ec2-instance-slack-watch.py

#!/usr/bin/env python

import boto3
import json
import requests
from datetime import datetime

filter = [{'Name': 'tag:Name', 'Values': ['test-kitchen', 'Packer']}]
boto3.setup_default_session(profile_name='prod')
ec2 = boto3.resource('ec2')
instances = []
time_now = int(datetime.now().strftime("%s"))
time_limit = 2

for instance in ec2.instances.filter(Filters=filter):
    time_running = (time_now - int(instance.launch_time.strftime("%s"))) / 3600
    if instance.state['Code'] == 16 and time_running > time_limit:
        instances.append([
            instance.instance_id, instance.key_pair.name, time_running])

if len(instances):
    slack_message = "*Found orphaned test-kitchen or packer instance(s):*\n"
    for instance in instances:
        slack_message = slack_message + \
            "{0} started by <@{1}> running for {2} hours\n".format(
                instance[0], instance[1], instance[2])

    slack_payload = {
        'channel': '#ops-notifications',
        'username': 'Leroy',
        'text': slack_message
    }
    slack_url = 'https://hooks.slack.com/services/' \
        + 'YOUR/TOKENHERE'
    requests.post(slack_url, data=json.dumps(slack_payload))