AWS Classroom Series – 24/Apr/2021

Elastic Compute Cloud EC2

• AWS EC2 provides scalable computing capacity in AWS.
• EC2 is a virtual machine in AWS Cloud which are referred as instances
• AWS EC2 allows to create
  • Windows Instances
  • Linux Instances
  • MAC Instances
• To Create an EC2 instance we need
  • a preconfigure template for instance known as Amazon Machine Image that includes Operating Systema & additional Softwares
  • Configuration of CPU, Memory and networking capacity known as instance type
  • A firewall that enables us to specify the ports, protocols and source IP ranges that can reach your instance
  • A virtual private cloud (VPC)
  • A public ip address
  • A key pair to login into ec2 instance
• Lets create a key pair. Key pair is combination of private key and public key.
  • The key pair can be created in AWS Console and AWS will store the publick key and gives us the private key as pem file
  • We can import the existing key pair
    • Lets create a local key pair
    • Now import the public key to aws
• Now lets create a security group which opens 22 port for communication
• Now lets create a redhat 8 ec2 instance
• When we create an ec2 instance the following will be the other components created/used
• Exercise: Create an ubuntu 20 os with the key pair which is imported
  • To Create a key pair

  ssh-keygen -t rsa -C "mykeypair" -f "./mykeypair"
  

  • Create a security group with only ssh port opened
  • Select the instance type => t2.micro