lambda-partition-auto-expansion

When expanding a Elastic Block Storage (EBS) volume connected to an Elastic Compute Cloud (Ec2) instance, be it through automation of manually through the AWS Console, there was a manual step to go into the operating system and expand the partition to take advantage of the newly allocated space.

With this Lambda, this is now automated.

Functionality

1. Something triggers the modification of an EBS Volume
2. Like any API call, the ModifyVolume call gets logged in Cloudtrail.
3. Cloudwatch events has a rule that triggers on a certain event and starts a lambda function.
4. The Lambda function
   • Checks if a change has been made to the volume's size. If not, it stops.
   • It finds the Instance connected to the volume being modified.
   • It will find the OS of the instance
   • It will trigger the right System Manger document to run against the instance
5. The document scans for changes to it's attached storage and expands any volume that has more partition-able space than is in use.

To-Do

• Linux support

CLI

Deploy project remotely

    $ sls deploy

Deploy a function remotely

    $ sls deploy function -f partitionextension --region eu-west-1 

UnDeploy or Destroy Lambda Deployment

    $ sls remove