ETC - AWS instance auto start/close

 Step - 1 - IAM Policy create

==========

AWS IAM select

left menu "policy" select

select "create policy" in left side

select "JSON" tab

copy and paste next contents

===========================

{

  "Version": "2012-10-17",

  "Statement": [

    {

      "Effect": "Allow",

      "Action": [

        "logs:CreateLogGroup",

        "logs:CreateLogStream",

        "logs:PutLogEvents"

      ],

      "Resource": "arn:aws:logs:*:*:*"

    },

    {

      "Effect": "Allow",

      "Action": [

        "ec2:Start*",

        "ec2:Stop*"

      ],

      "Resource": "*"

    }

  ]

}

============================

select "tag"

insert name & description

create "role"

select "role" in left menu

select "create role" in left side

select AWS services & Lambda in usecase

connect to policy "ec2_instance_turn_on" 

select "next" button till done

Step - 2 - Create Lambda

==========

Select "Lambda" services

select "create function" button left side

select "create new"

insert function name "ec2_turn_off"

select "Python 3.9" in runtime

select "use already exist role" in radio button

select role name that maked before

select "component" tab

select "edit" button in left side

change time limit to 10 sec

copy & paste next contents

==================

import boto3

region = 'us-west-1'

instances = ['i-ddddddddddddddd', 'i-ssssssssssss']

ec2 = boto3.client('ec2', region_name=region)

def lambda_handler(event, context):

    ec2.stop_instances(InstanceIds=instances)

    print('stopped your instances: ' + str(instances))

==================

----------change region , instances value

region names can get in top left, click "region" button

instances value get from EC2 "instance ID" columns

do it again for create start instance lambda function

copy & paste next contents

========================

import boto3

region = 'us-west-1'

instances = ['i-ddddddddddddddd', 'i-ssssssssssss']

ec2 = boto3.client('ec2', region_name=region)

def lambda_handler(event, context):

    ec2.start_instances(InstanceIds=instances)

    print('started your instances: ' + str(instances))

=========================

Step - 3 - cloudwatch services connect

==========

Select CloudWatch services

select "rule" button in left side

select "move to CloudWatch Events" button

select "create role" button

select schedule tab

select cron expression radio button

===using cron expression in linux - minute hour day month day_of_the_week

===time zone is UTC so that in KST must calcuate in -9 hour 

screen must change like next picture

do it again for instance turn on