EC2 CRON

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Features

• Allows you to schedule a CRON job(cloudwatch rule) to perform START, STOP or REBOOT for EC2 INSTANCES for given tag key and its value.

Architecture Diagram

How to Deploy

Step 1: Go to the

Step 2: Enter Values for the following as per your needs

• Application name [ Stack Name of the application created via AWS Cloudformation]
• EC2CronFunction [ Name of the Lambda Function Name ]
• Action [Supported Values are STOP, START or REBOOT - This is Action that will be performed on fitlered ec2 instances]
• CronSchedule [ Cron Schedule for CloudWatch Event Refer: Link for syntax help ]
• TagKey [ Name of the Tag Key that you want to use in filter]
• TagValue [ Value of the Tag Key that you want to use in filter]

Step 3: Select the check box "I acknowledge that this app creates custom IAM roles" and Click on Deploy

Resources that get created with this deployment are as follows:

1. Lambda Function
2. Cloud Watch Event
3. CloudWatchEventPermission
4. IAM Role with default AWSLambdaBasicExecutionRole Policy and below custom policy Policy

{
    "Statement": [
        {
            "Action": [
                "ec2:RebootInstances",
                "ec2:StartInstances",
                "ec2:StopInstances"
            ],
            "Resource": "arn:aws:ec2:us-east-2:013472794367:instance:*",
            "Effect": "Allow"
        },
        {
            "Action": [
                "ec2:DescribeInstances"
            ],
            "Resource": "*",
            "Effect": "Allow"
        }
    ]
}

Local Development

To use the SAM CLI, you need the following tools.

• SAM CLI - Install the SAM CLI
• Python 3 installed
• Docker - Install Docker community edition

To build and deploy your application for the first time, run the following in your shell:

sam build --use-container
sam deploy --guided

AWS$ sam local invoke --env-vars env.json

License Summary

This sample code is made available under MIT license. See the LICENSE file.

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Contributing

Have an idea for a feature to enhance this serverless application? Open an issue or pull request !