Amazon EBS Fast Snapshot Restore

[ewbankkit]

Community Note

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Description

You can now enable Fast Snapshot Restore (FSR) on Amazon Elastic Block Store (EBS) snapshots, ensuring that EBS volumes restored from FSR-enabled snapshots instantly receive full provisioned performance.

New or Affected Resource(s)

• aws_ebs_snapshot

Potential Terraform Configuration

resource "aws_ebs_snapshot" "example" {
  fast_snapshot_restore {
  }
}

References

Announcement.
Blog post.
User guide.

Requires AWS SDK v1.25.39:

• Update module aws/aws-sdk-go to v1.25.42 #10955

[blckct]

That's a cool feature!
It seems the configuration should be a simple true/false though? Maybe with an option to skip waiting for the snapshot to be optimised?

[ewbankkit]

@blckct A brief look at the API suggested to me that you would have to specify the AZs for the FSR.

[blckct]

@ewbankkit Oh, you're right.

[jleeh]

Would it make sense to have a seperate resource for this as well as a block within the snapshot resource?

Line of thinking is that FSR can be enabled and disabled independently to the snapshot creation, so users may want to enable/disable FSR in different pipelines to the snapshot creation. Especially considering the cost of FSR.

[Surajgupta9160]

Do we have any update on this feature?

[ron-spree]

Almost three years later, perhaps this has been implemented elsewhere, or is it still a wishlist/pending feature?

[nikoul]

Hello @breathingdust, happy to see this got prioritized. Any estimation on when it would be available? Happy to contribute if needed.
Thanks!

[jar-b]

Related APIs

• https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_EnableFastSnapshotRestores.html
• https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeFastSnapshotRestores.html
• https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DisableFastSnapshotRestores.html

Proposed Design

As the CreateSnapshot API does not provide a mechanism to enable/disable fast snapshot restoration as part of the initial creation, I'd propose implementing this as a separate, standalone resource. The EnableFastSnapshotRestores API can accept multiple snapshot identifiers in a single request, however, implementing this as a singular resource (single ID versus an array of IDs) aligns with the preferred design principles for the AWS provider. This design also prevents partial failure scenarios where some items complete successfully and others fail, leaving a complex remote state to reconcile on the following plan/apply.

resource "aws_ebs_fast_snapshot_restore" "example" {
  availability_zone  = "us-east-2a"
  source_snapshot_id = aws_ebs_snapshot.example.id
}