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‫Let's do a summary

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‫on what we learned for EC2.

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‫So we have created EC2 Instances,

4
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‫and they were composed of an AMI,

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‫which was defining the operating system.

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‫Then we defined an instance size

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‫where we defined how much CPU power we want,

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‫and how much RAM we want.

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‫We described the storage for our EC2 Instance,

10
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‫We defined the firewall on our instances

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‫with the security groups,

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‫and finally, a bootstrap script called the EC2 User Data

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‫that was started when the EC2 Instance was started.

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‫So the security groups are attached to EC2 Instances.

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‫And they are a firewall outside of your instance.

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‫And you can define rules to allow which ports

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‫and which API can access your EC2 instance.

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‫For EC2 User Data,

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‫this was a script that we launched

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‫at the first start of an instance

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‫that we used to set up our EC2 instance

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‫to be a web server and say "hello world".

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‫SSH was a way for us to start a terminal

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‫from our computers into our EC2 Instances,

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‫to start issuing commands on port 22.

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‫And once we did it,

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‫we were able to leverage an EC2 Instance role

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‫that was similar to IAM role,

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‫to have our EC2 instance issue commands against IAM.

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‫In terms of the EC2 purchasing options,

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‫we have multiple options you need to know for the exam.

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‫We have On-demand, Spot, Reserved in three flavors

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‫of Standard, Convertible and Scheduled.

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‫We have Dedicated Host and finally Dedicated Instances.

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‫So that's it.

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‫I hope you liked it

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‫and I will see you in the next section.