EC2 instance hibernate must be backed by EBS volumes, instance stores aren’t supported.AMIs supported: Amazon Linux 2 AMI, Amazon Linux AMI, Ubuntu 18.04 LTS, and Ubuntu 16.04 LTS.Instance RAM size should be less than 150GB.Hibernation is supported with following instance types:.However in order for the EC2 instance to be enabled for hibernation you need to keep in mind the following pre-requisites for using the hibernation feature: In order to perform hibernation on the EC2 instance you need to have the hibernation enabled on the EC2 instance while configuring the details for the EC2 instance. Previously attached data volumes are reattached and the instance retains its instance ID.Contents of EBS volumes are loaded again.Processes that were stopped while stopping the EC2 instance will be resumed.When the EC2 instance is started again following things happen: Using hibernate, you can maintain a fleet of pre-warmed instances that can get to a productive state faster without modifying your existing applications. Hibernation saves effort in setting up the environment or applications all over again, and saves time by reducing the long start up time taken by applications. Now Amazon has introduced a new EC2 hibernation feature which when enabled on an EC2 instance signals the operating system to save the contents of your RAM to your Amazon EBS root volume. However if we terminate an EC2 instance, then by default the root device volume also gets terminated. If we start the EC2 instance, the data is restored on the EC2 instance. So far in our AWS posts we have learned if we stop the EC2 instance the data on the EBS volumes persists.
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