####Bash script for Automatic EBS Snapshots and Cleanup on Amazon Web Services (AWS)

Written by [AWS Consultants - Casey Labs Inc.] (http://www.caseylabs.com) Contact us for all your Amazon Web Services Consulting needs!

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How it works: ebs-snapshot.sh will:

• Determine the instance ID of the EC2 server on which the script runs
• Gather a list of all volume IDs attached to that instance
• Take a snapshot of each attached volume
• The script will then delete all associated snapshots taken by the script that are older than 7 days

Pull requests greatly welcomed!

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REQUIREMENTS

IAM User: This script requires that a new user (e.g. ebs-snapshot) be created in the IAM section of AWS.
Here is a sample IAM policy for AWS permissions that this new user will require:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "Stmt1426256275000",
            "Effect": "Allow",
            "Action": [
                "ec2:CreateSnapshot",
                "ec2:CreateTags",
                "ec2:DeleteSnapshot",
                "ec2:DescribeSnapshots",
                "ec2:DescribeVolumes"
            ],
            "Resource": [
                "*"
            ]
        }
    ]
}

AWS CLI: This script requires the AWS CLI tools to be installed.

Linux install instructions for AWS CLI:

• Make sure Python pip is installed (e.g. yum install python-pip, or apt-get install python-pip)
• Then run:

pip install awscli

Once the AWS CLI has been installed, you'll need to configure it with the credentials of the IAM user created above: (Note: this step can be skipped if you have an IAM Role setup for your instance to use the IAM policy listed above.)

sudo aws configure

Access Key & Secret Access Key: enter in the credentials generated above for the new IAM user.

Region Name: the region that this instance is currently in: i.e. us-east-1, eu-west-1, etc.

Output Format: enter "text"

Then copy this Bash script to /opt/aws/ebs-snapshot.sh and make it executable:

chmod +x /opt/aws/ebs-snapshot.sh

You should then setup a cron job in order to schedule a nightly backup. Example crontab job:

55 22 * * * root  AWS_CONFIG_FILE="/root/.aws/config" /opt/aws/ebs-snapshot.sh

To manually test the script:

sudo /opt/aws/ebs-snapshot.sh