anhtv08

#!/usr/bin/env bash

bucket_name=joey-my-sam-app
project_dir=$HOME/working/cloud-computing/lambda-demos

# packaging application
sam package \
    --output-template-file $project_dir/output/packaged.yaml \
    --s3-bucket $bucket_name > /dev/null

anhtv08

AWSTemplateFormatVersion: 2010-09-09
Transform: 'AWS::Serverless-2016-10-31'
#Parameters:
#  LambdaExecutionRole:

Resources:
  ruleEvaluationDev:
    Type: 'AWS::Serverless::Function'
    Properties:
      FunctionName: 'cost-controller-function'

anhtv08

def shutdown_ec2_instance(ec2_client, instanceId):
    log.info("shutting down instance-id :" + instanceId)
    ec2_client.terminate_instances(
        InstanceIds=[
            instanceId
        ]
    )

anhtv08

def validate_tag_name(tags: List[str]):
    required_tag_names: Sequence[str] = ['environment', 'owner', 'projectName', 'costCentre']
    is_valid = True

    for required_tag in required_tag_names:
        if required_tag not in tags:
            is_valid = False
            break

    return is_valid

anhtv08

def evaluate_ec2_instance(ec2_client, event):
    instance_id = event['detail']['instance-id']
    instance_state = event['detail']['state']

    '''
        only perform this evaluation rule when starting an new instance
        check if instance state is pending then try to perfrom evaluation 
    '''
    if instance_state != 'pending':
        log.info('current state : ' + instance_state)

anhtv08

def lambda_handler(event, context):
    log.info(" evaluating tags of ec2 instance")
    if not event:
        log.info("event is not valid")
    else:
        evaluate_ec2_instance(ec2_client, event)

anhtv08

Resources:
  ruleEvaluationDev:
    Type: 'AWS::Serverless::Function'
    Properties:
      FunctionName: 'cost-controller-function'
      Description: 'Integrating lambda with Parameter Store'
      Handler: 'cost_controller.cost_controller_handlers.lambda_handler'
      Runtime: 'python3.6'
      Role: 'arn:aws:iam::<your_account_id_here>:role/service-role/my-rule-evaluation-function'
      Timeout: 5

anhtv08

from typing import Sequence
import logging as log
import boto3
from typing import List
from botocore.exceptions import ClientError
from typing import Dict

ec2_client = boto3.client('ec2')
sns_client = boto3.client('sns')

anhtv08

keyspace: perftesting

keyspace_definition: 
  CREATE KEYSPACE perftesting WITH replication = { 'class': 'SimpleStrategy', 'replication_factor': 3};

table: users

table_definition:

  CREATE TABLE users (

anhtv08

CASSANDRA_VERION=3.11
CASSANDRA_NODES=(
                CASSANDRA_1 \
                CASSANDRA_2 \
                CASSANDRA_3
               )  

# setup cassandra 3.11
# assume you have docker installed.