You have an EC2 instance and you have made configuration changes in the Operating systems and configured some applications and made changes for that as well.
Now you want to create another EC2 instance with the same configurations.So we will take the backup of that instance (AMI) which is known as Custom AMI.
In this blog post , We will learn to Create EC2 instance from Custom AMI
What is AMI?
An Amazon Machine Image (AMI) is a template that contains a software configuration (for example, an operating system, an application server, and applications.
The Amazon machine Images provides the necessary information required to launch an instance.
You must select an AMI when you launch an instance.
If you want to launch multiple instances using same configurations, You can do it from single AMI.
Also you can use different AMI’s to launch different EC2 Instances with Different configurations.
AMI includes:
one or more EBS snapshots, Which means , by default each ec2 instance is attached with root volume , It will create a backup of the volume as well.
A block device mapping that specifies that volume to be attached to the instance when it’s launched.
Here you will asked to follow the same process of Instance creation.During this process If you feel like you want to make some configuration changes to the EC2 instance such as Instance type , EBS Volume , Security group.