All language subtitles for 29 - CCPSAADVA AMI Overview English

Now let's talk about

what powers our EC2 instances which is an AMI,

so AMI stands for Amazon machine image

and they represent a customization of an EC2 instance.

So you can use AMIs you created by AWS

or you can customize it into your own and what is in an AMI?

Well we have our own software configuration,

we can define and set up the operating system,

we can set up any monitoring tool

and if we create our own AMI

we're going to get a faster boot time and configuration time

because all the software that we want to install

onto our EC2 instance

is going to be prepackaged through the AMI.

So we have to build our own AMIs

and they can be built for a specific region

and then they can be copied across region

if we wanted to use it

and leverage the AWS global infrastructure.

So we can launch EC2 instances from different kind of AMIs.

What we've been doing so far in this course

is to use a public AMI and these are provided by AWS.

So the Amazon Linux 2 AMI is a very popular AMI for AWS

and it was provided by AWS themselves

but we can create our own AMI

then therefore you have to make and maintain them yourself

there are tools obviously to automate this

but this is a task that you have to do as a cloud user

or finally you can launch an EC2 instance

from an AWS Marketplace AMI

which is an AMI that has been made by someone else

and potentially sold by someone else

so it is quite common to have vendors on AWS

to create their own AMIs or their own software

with a nice configuration and so on

and then they will sell it through the marketplace AMI

for you to buy it and to save some time.

And even you as a user you could create a business

of selling AMIs on the AWS marketplace,

this is something that some businesses do.

Okay so the AMI process from an EC2 instance,

how does it work?

Well we'll start an EC2 instance and we'll customize it.

Then we will stop the instance

to make sure the data integrity is correct,

then we can build an AMI from it

so this will also create EBS snapshots behind the scenes

and then finally we can launch instances from other AMIs

so this is what we'll be doing

in the demo and the next lecture.

So we have US-EAST-1A,

and we can create the same instance as US-EAST-1B,

so the process is we launch the instance in US-EAST-1A,

we're going to customize it

then we're going to create an AMI from it

this will be our custom AMI.

And then in US-EAST-1B

we will be able to launch from that AMI

and we'll effectively create a copy of our EC2 instance.

So I hope you're excited

and I will see you in the next lecture.