What is AMI in AWS

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  • harris2020

    Are you working on the Amazon Web Services (or AWS) cloud platform? Amazon Machine Image (or AMI) offers an easy and visual mode of launching instances of your virtual machine on the cloud platform.

    For example, you may want to launch multiple and identical instances of the same virtual machine for your applications. AMI allows you to do that by creating an unlimited number of instances having the same configuration in a short period of time.

    Additionally, you can use AMI to create multiple instances of different virtual machines when you require instances of different configurations.

    How does the AMI technology work and what are the different types of AMI that are available for your use? Let’s discuss all this and more in the following below-given sections.

    What is AWS AMI?
    In simple words, an AWS AMI is a virtual image that can be used to create an instance of a virtual machine. How does it operate? Here’s an illustration that summarizes the AMI lifecycle:

    The template that is the root volume for the AWS instances (example, application server, operating system, or web application).
    Launch permissions that determine which AWS account can use this AMI to set up an instance.
    Block device mapping that specifies the root device volumes that is attached to the AWS instance after launch.
    What are the types of AWS AMI?
    As an AWS user, you can choose your AMI on the basis of the following parameters:

    Operating system
    You can choose an AMI on the basis of the supported operating system (or OS) like Windows or Linux.

    32-bit or 64-bit architecture
    This parameter is based on the architecture of your selected OS.

    This parameter is based on the selected region of the Amazon machine image that comprises regions, availability zones, and local zones. Each region operates in different geographical regions and are independent of each other.

    Storage (EBS or Instance store)
    This AMI parameter is based on the storage of the root device. Based on storage, AMIs are categorized as either of the following two types namely:

    EBS-backed instances: In this case, the root device for an AWS instance – launched using AMI – is an Amazon EBS volume that has been created from Amazon EBS.
    Instance store-backed instances: In this case, the root device for an AWS instance – launched using Ami – is an Amazon instance store volume that has been created from an Amazon S3 template.

    Launch permissions
    An AMI owner can determine their instance availability through the following three launch permissions:

    Public, that grants instance launch permission to all AWS account holders.
    Explicit, that grants launch permission only to specific AWS accounts.
    Implicit, where only the AMI owner has the permission to launch an instance.

    Know more -https://mindmajix.com/what-is-ami-in-aws

    • This topic was modified 10 months, 3 weeks ago by harris2020.
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