Let’s look more closely at how to restore an Amazon EC2 instance from a snapshot. Bobcares, as part of our AWS Support Services, responds to all AWS inquiries, large or small.

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Restore AWS EC2 Instance From Snapshot?

We must first think about how the operation will affect the applications and services that rely on the instance we are restoring, and then we must coordinate the restore as appropriate.

It’s possible to restore data from an Amazon EBS snapshot into an EBS volume, a high-performance block-storage device attached to Amazon EC2. There is greater latency than usual if the data is being loaded from Amazon S3 if an application requests the volume when the data is not loaded. For applications that require low latency, we can pre-warm the data from a snapshot onto an EBS volume to avoid this impact. Fast snapshot restore is supported by Amazon EBS for an extra fee, which eliminates the need to pre-warm the data.

How To Restore AWS EC2 Instance From Snapshot?

By building a volume from a snapshot and attaching it to an active EC2 instance, we can restore a non-root volume attached to the instance. To create a volume from an existing snapshot, we can utilize the console, the AWS CLI, or the API procedures. The operating system will then be used to mount the volume to the instance.

Unmount the existing volume if it has to utilize the same mount point in order to make room for the new volume. Stop any processes that are utilizing the volume before unmounting it. For instance, use the console to perform the following steps to restore a volume to a previous point-in-time backup for EC2 instances without using elastic load balancing.

1. Firstly, select Snapshots from the Elastic Block Store menu on the Amazon EC2 console.
2. Then locate the snapshot that we want to restore, and select it.
3. Choose Actions, and then choose Create Volume.
4. Now create the new volume in the same Availability Zone as the EC2 instance.
5. Also, select the instance on the Amazon EC2 console.
6. Make a note of the device name we want to replace in the Root device entry or the Block Devices entry in the instance information.
7. Attach the volume. For root volumes and non-root volumes, the procedure is different.

For root volumes, follow these steps to attach the volume.

1. Stop the EC2 instance.
2. Choose the replacement root volume from the EC2 Elastic Block Store Volumes menu.
3. Select Actions, and then Detach Volume.
4. Select the new volume from the EC2 Elastic Block Store Volumes menu.
5. Now choose Actions, and then choose Attach Volume.
6. Use the same device name that we noticed earlier and choose the instance to which we want to attach the volume.

For non-root volumes, follow these steps to attach the volume.

1. Choose the non-root volume we want to replace from the EC2 Elastic Block Store Volumes menu.
2. Now select Actions, and then Detach Volume.
3. Select the new volume from the EC2 Elastic Block Store Volumes menu, then select Actions, Attach Volume to attach it. Then, choose a device name from the list after choosing the instance to which we want to attach it.
4. Using the operating system for the instance, unmount the existing volume, and then mount the new volume in its place.
5. Detach any prior volumes that we may replace by choosing it on the EC2 Elastic Block Store Volumes menu and then choosing Actions, Detach Volume.

We can also use AWS CLI with operating system commands to automate these steps.

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Conclusion

Test your restore process frequently in lower-level contexts to ensure that it satisfies the recovery point objective (RPO) and recovery time objective (RTO)  and that it operates as intended for the best outcomes. To conclude, our Support team briefly explains the steps to restore the AWS EC2 instance from the snapshot.