AWS Classroom Series – 19/Nov/2021

EBS Snapshots

• Backup of the data on EBS volumes can be acheived by taking Snapshots
• Snapshots are incremental backups
• Basic process of snapshots
• Backups can be restored to create EBS Volumes
  • Restore Snapshot 1
  • Restore Snapshot 2
  • Restore Snapshot 3
• Deleting Snapshots
  • Delete Snapshot 1
  • Deleted Snapshot 2 (Snapshot 1 is still Existing)
  • Delete snapshot 3 (Latest Snapshot):
  • Note: In AWS there will no impact if you delete the older snapshots, but if you delete the latest snapshot you might loose data. So prefer deleting older snapshots.
• EBS Volume is a Resource of Availability Zone, Where as snapshot is accessible across the region. Using the Snapshot we can create an EBS volume in any AZ of the same Region.
• To create an EBS volume in the different region with same data we can copy the snapshot from one region to another, Then use this snapshot to create a EBS volume.
• Activity:
  • Lets create an EC2 instance with two volume (one os disk) add additional disk
  • Now lets login into ec2 instance ssh -i <path to pem> ubuntu@<publicip>
  • Lets list block devices and create a filesystem and mount
  • Now lets create some content in that drive
  • Now lets try to create the snapshot of the disk with 1 GB Storage
  • Now Delete the ec2 instance.
  • Next Steps:
    • Using the Snapshot which we have create, lets create EBS volumes in same region and any different region.
    • Mount the EBS volume to some ec2 instance and verify the data