rds_start_business_hours.py

rds_start_business_hours.py

import boto3
import sys, traceback
from datetime import datetime
from time import sleep

def start_rds_instances():
    start_time = datetime.now()
    # starting ec2 client for list regions
    ec2_client = boto3.client('ec2')

    # starting rds client
    rds_client = boto3.client('rds')

    # list all AWS regions
    regions = ec2_client.describe_regions()
    for region in regions['Regions']:
        try:
            print("Region: " + str(region['RegionName']))
            rds_client = boto3.client('rds', region_name=region['RegionName'])
            instances = rds_client.describe_db_instances()
            instanceIds = list()

            # for each instance
            for instance in instances['DBInstances']:
                arn = instance['DBInstanceArn']
                if instance['DBInstanceStatus'] == "stopped": 
                    tags = rds_client.list_tags_for_resource(ResourceName=arn)['TagList']
                    for tag in tags:
                        try:
                            if tag['Key'] == 'working' and tag['Value'] == 'only-business-hours' :
                                print(tag)
                                instanceIds.append(instance['DBInstanceIdentifier'])
                        except:
                            print "Not expected error: ", traceback.print_exc()
            if len(instanceIds) > 0 : 
                for instanceId in instanceIds:
                    print "Starting RDS instance: " + str(instanceId)
                    rds_client.start_db_instance(DBInstanceIdentifier=instanceId)                                                   
        except:
            print "Not expected error:", traceback.print_exc()
    end_time = datetime.now()
    took_time = end_time - start_time
    print "Total time of execution: " + str(took_time)    

def lambda_handler(event, context):
    print('Starting RDS instances... ')
    start_rds_instances()