AWS Classroom Series – 09/May/2021 – Direct DevOps from Quality Thought

Refer Here
Instance Families
- T family: Cheap, moderate baseline performance with the ability to burst to higher performance for short periods of time
- M family: General purpose with balance ratio of CPU and memory
- C family: Compute optimized, high CPU performance
- R family: Memory Optimized with more memory that CPU power
- D family: Storage optimized, offering huge HDD capacity
- I family: Storage Optimized, offering huge SSD capacity
- X family: Extensive capacity with focus on memory up to 1952 GB memory and 128 virtual cores
- F family: Accelerated computing based of FPGA (Field programmable gate arrays)
- P,G and CG family: Accelerated computing based on GPUs (graphics processing units)
In November 2017 AWS announced a new generation of virtualization called as Nitro.
Nitro combines KVM-based hypervisor with customized hardware (ASICs) aiming to provide a performance that is far better than bare metal machines
Refer Here for official page on AWS Nitro

For this lab environment lets assume the workload which we need to run is spring-pet clinic
To run this application, we need java to be installed (java 11)
Then we need to download the application package Refer Here and run the application using java -jar spring-petclinic-2.4.2.jar
This application will be using 8080 port for communication
Approach 1:
- Create a ec2 instance and execute all of the steps manually
```
sudo apt update
sudo apt install openjdk-11-jdk -y
 wget https://referenceapplicationskhaja.s3-us-west-2.amazonaws.com/spring-petclinic-2.4.2.jar
java -jar spring-petclinic-2.4.2.jar
```
- Now navigate to http://<publicip>:8080
Approach 2: Installing the application automatically during creation
- Select ubuntu 18 and t2.micro and in the Configure Instance Details page
- In the Advanced detail section execute the following shell script
```
#!/bin/bash
apt update
apt install openjdk-11-jdk -y
cd /home/ubuntu
wget https://referenceapplicationskhaja.s3-us-west-2.amazonaws.com/spring-petclinic-2.4.2.jar
java -jar /home/ubuntu/spring-petclinic-2.4.2.jar &
```
In Approach 2 the application is installed while ec2 instance is created.
If we want to have multiple instances created with the same application, it would be good if we can launch some AMI and directly get this application.
So we need to understand how to create an AMI with custom applications in it.