aws-saver

A simple bash script to start and stop instances using tags, schedulable via cron to automate the start/stop process

Features:

Save money on aws stoping your non production instances.
Check it if the selected instances are running or not.

Limitations:

Limited to linux, tested on ubuntu only.

Prerequisites:

Have an IAM user limited to start and stop instances only. If you don't have it:
- Create AIM user
- Create a new policy
- Attach the policiy to your user.

####Steps to create a new policy

Go to AWS Management Console > IAM > Policies > Create new policy > Create yout own police.

Set a name, description and in Policy Document paste the following with your region and your AWS account ID:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "Stmt1459458248000",
            "Effect": "Allow",
            "Action": [
                "ec2:StartInstances",
                "ec2:StopInstances"
            ],
            "Condition": {
                "StringNotEquals": {
                    "ec2:ResourceTag/Environment": "Production"
                }
            },
            "Resource": [
                "arn:aws:ec2:us-east-1:{your_account_id}:instance/*"
            ]
        }
    ]
}

In my case I have a condition to use the all "Environment" tags except "Production" to protect my production's instances. You can obviate the condition statement.

Have installed the aws command line (CLI). If you don't have it go to Installing the AWS Command Line Interface
Have taged the desired instances with a specific tag.

Usage:

To use in the easy way you can place the bash on usr/local/bin.

if you prefer use other location, you can add on /etc/environment/ file on PATH variable the custom location.

saver.sh {tag_name} {tag_value} list | status | start | stop.

list

Display the instances with the specified tag.

status

Display the status (stop or running) of the instances with the specified tag.

start

Start (power on) the instances matching with ths specified tag.

stop

Stop (power off) the instances matching with ths specified tag.

Using cron

In order to automate the process you could use cron.

50 3 * * * {saver_path}/saver.sh {tag_name} {tag_value} {action}

Example:

50 3 * * * /opt/tools/aws-saver/saver.sh Saver Enable stop
0 12 * * * /opt/tools/aws-saver/saver.sh Saver Enable start

gem2016 / aws-saver