AWS-AMI-Auto-Backup

Shell Script to auto make AMI backup and delete old backups.

Pre-request

You need install AWS tools at your system.
You can use yum install aws* to install all require packages.
And please make sure your AWS tools install path is same with this script path.
Please use "env | grep EC2_HOME" to find out your system's setting.
Please use "env | grep JAVA_HOME" to find out your system's setting.
Please add IAM role with appropriate permissions and launch instance with this IAM Role.
If you are not familiar with IAM Role, you can create a admin IAM Role for quick use.

region: Reference http://docs.aws.amazon.com/general/latest/gr/rande.html
instanceID: You can find your instance ID at AWS Manage Console
amiNamePrefix: Your prefer AMI name prefix
amiDescription: Your prefer AMI description
routine: If you want to keep 7 days AMI backups, please set this variable true otherwise set it false.

If you set routine false, this script will delete all your exist AMIs and Snapshots.
If you set routine true, AMI name will be $amiNamePrefix+$weekday.
for example, if you set $amiNamePrefix as "My AMI Backup " and set routine true.
then your AMI name will be "My AMI Backup Mon" (without quotation marks).