MultiCloud Classroom notes 23/Aug/2026

Lambda Pricing

• no of requests
• excution duration
• memory allocations (GB-seconds)
• aditional cost – vpc logs, applicatin logs storage
• provisined concurrency build or triggers.

create lambda and ec2 instance tag enviroment dev

1. sample code based ec2 tags
   1. stop
   2. start
2. permissions: (role)
   1. lambada execute
   2. ec2 instance action

sample code for stop and start ec2 instance

import boto3

def lambda_handler(event, context):
    ec2 = boto3.client('ec2')

    tag_key = event.get('tag_key', 'schedule')
    tag_value = event.get('tag_value', 'schedule')
    action = event.get('action')

    response = ec2.describe_instances(
        Filters=[
            {
                'Name': f'tag:{tag_key}',
                'Values': [tag_value]
            }
        ]
    )

    results = []

    for reservation in response['Reservations']:
        for instance in reservation['Instances']:
            instance_id = instance['InstanceId']
            state = instance['State']['Name']

            if action == 'start' and state == 'stopped':
                ec2.start_instances(InstanceIds=[instance_id])
                results.append(f"Started {instance_id}")

            elif action == 'stop' and state == 'running':
                ec2.stop_instances(InstanceIds=[instance_id])
                results.append(f"Stopped {instance_id}")

            else:
                results.append(f"Instance {instance_id} is in state {state}")

    return {
        "results": results
    }

example event

{
    "action": "stop",
    "tag_key": "Environment",
    "tag_value": "dev"
}

Task:

1. create lambda and deploy above sample code
2. try deploy code aws cli