Configure a server to use an EBS Snapshot to create a volume and attach it to an instance.
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When you attach an EBS Volume to an instance, what you're really doing is creating a volume from that snapshot and attaching the volume to the instance. Technically speaking, you cannot attach an EBS Snapshot to a running instance. If you want to attach an existing volume, see Attach an EBS Volume to an Instance. The advantage of "attaching a snapshot" to an instance is that you don't have to worry about creating the volume in the correct availability zone. Instead, a volume will be created from the snapshot in the same availability zone as your instance. Another advantage is that by default, the created and attached volume will be deleted when the instance is terminated. If you were to attach an existing volume the old way (instead of attaching a snapshot) the volume would persist and not be deleted.
There are two ways you can attach an EBS Snapshot to an instance:
Go to the Volume's tab of the running server. Click the Attach Snapshot button.
Go to Clouds -> AWS Region -> EBS Snapshots and select the EBS Snapshot that you want to attach to a server at boot time. You can also attach a snapshot to a stopped server or "Next" server (of a running server) under the Volume's tab.
When you configure a server to attach an EBS Snapshot, a volume will be created and attached to the server the next time that it is launched/relaunched.
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