EC2 Instance Generation

01 Sign in to the AWS Management Console.

02 Navigate to Amazon EC2 console available at https://console.aws.amazon.com/ec2/.

03 In the left navigation panel, under Instances, choose Instances.

04 Select the Amazon EC2 instance that you want to examine.

05 Choose the Details tab from the console split panel to access the instance configuration information.

06 In the Instance summary section, check the Instance type configuration attribute value to determine if the chosen instance type is from the previous generation. If the instance type is from the previous generation, the instance type configured for the selected Amazon EC2 instance should be upgraded to the latest generation.

07 Repeat steps no. 4 – 6 for each Amazon EC2 instance available within the current AWS region.

08 Change the AWS cloud region from the console navigation bar and repeat the Audit process for other AWS regions.

01 Run describe-instances command (OSX/Linux/UNIX) with custom output filters to list the IDs of the Amazon EC2 instances provisioned in the selected AWS cloud region:

aws ec2 describe-instances
  --region us-east-1
  --output table
  --query 'Reservations[*].Instances[*].InstanceId'

02 The command output should return a table with the requested EC2 instance identifiers (IDs):

-------------------------
|   DescribeInstances   |
+-----------------------+
|  i-01234abcd1234abcd  |
|  i-0abcdabcdabcdabcd  |
|  i-0abcd1234abcd1234  |
+-----------------------+

03 Run describe-instances command (OSX/Linux/UNIX) with the ID of the Amazon EC2 instance that you want to examine as the identifier parameter and custom filtering to describe the instance type used by the selected EC2 instance:

aws ec2 describe-instances
	--region us-east-1
	--instance-ids i-01234abcd1234abcd
	--query 'Reservations[*].Instances[*].InstanceType[]'

04 The command output should return the instance type configured for the selected instance:

[
	"c3.large"
]

05 Repeat steps no. 3 and 4 for each Amazon EC2 instance available in the selected AWS region.

06 Change the AWS cloud region by updating the --region command parameter value and repeat the Audit process for other regions.

01 CloudFormation template (JSON):

{
    "AWSTemplateFormatVersion":"2010-09-09",
    "Description":"Change EC2 instance type (new generation type)",
    "Resources":{
        "NewGenerationInstance":{
            "Type":"AWS::EC2::Instance",
            "Properties":{
            "InstanceType":"c5.large",
            "ImageId":"ami-0abcd1234abcd1234",
            "KeyName":"ssh-key",
            "SubnetId":"subnet-1234abcd",
            "SecurityGroupIds":[ "sg-01234abcd1234abcd"],
            "BlockDeviceMappings":[
                {
                    "DeviceName":"/dev/xvda",
                    "Ebs":{
                        "VolumeSize":"30",
                        "VolumeType":"gp2"
                    }
                }
            ]
            }
        }
    }
}

02 CloudFormation template (YAML):

AWSTemplateFormatVersion: '2010-09-09'
    Description: Change EC2 instance type (new generation type)
    Resources:
        NewGenerationInstance:
        Type: AWS::EC2::Instance
        Properties:
            InstanceType: c5.large
            ImageId: ami-0abcd1234abcd1234
            KeyName: ssh-key
            SubnetId: subnet-1234abcd
            SecurityGroupIds:
            - sg-01234abcd1234abcd
            BlockDeviceMappings:
            - DeviceName: "/dev/xvda"
            Ebs:
                VolumeSize: '30'
                VolumeType: gp2

01 Terraform configuration file (.tf):

terraform {
    required_providers {
        aws = {
            source  = "hashicorp/aws"
            version = "~> 3.27"
        }
    }

    required_version = ">= 0.14.9"
}

provider "aws" {
    profile = "default"
    region  = "us-east-1"
}

resource "aws_instance" "new-generation-instance" {

    ami = "ami-0abcd1234abcd1234"
    instance_type = "c5.large"

    lifecycle {
        ignore_changes = [ami]
    }

}

01 Sign in to the AWS Management Console.

02 Navigate to Amazon EC2 console available at https://console.aws.amazon.com/ec2/.

03 In the left navigation panel, under Instances, choose Instances.

04 Select the Amazon EC2 instance that you want to configure (upgrade).

05 Choose Instance state and select Stop instance.

06 In the Stop instance confirmation box, review the instance details, then choose Stop to stop the selected EC2 instance.

07 Once the instance is stopped (i.e., Instance State is set to Stopped), choose Actions, select Instance settings, and choose Change instance type.

08 On the Change instance type configuration page, select the equivalent latest generation instance type from the New instance type dropdown list, review the Instance type comparison tabel for comparison, and choose Change instance type to resize (upgrade) the selected Amazon EC2 instance. If the equivalent latest generation instance type is not available in the New instance type dropdown list, the recommended latest generation instance type is not compatible with your instance configuration. Use the Instance type comparison tabel to check for the equivalent instance type.

09 Choose Instance state and select Start instance. Once the boot sequence is complete, the Amazon EC2 instance status should change from Pending to Running.

10 Repeat steps no. 4 – 9 for each Amazon EC2 instance that you want to upgrade, available within the current AWS region.

11 Change the AWS cloud region from the console navigation bar and repeat the Remediation process for other regions.

01 Run stop-instances command (OSX/Linux/UNIX) to stop the Amazon EC2 instance that you want to configure:

aws ec2 stop-instances
	--region us-east-1
	--instance-ids i-01234abcd1234abcd

02 The output should return the **stop-instances** command request information:

{
	"StoppingInstances": [
		{
			"InstanceId": "i-01234abcd1234abcd",
			"CurrentState": {
				"Code": 64,
				"Name": "stopping"
			},
			"PreviousState": {
				"Code": 16,
				"Name": "running"
			}
		}
	]
}

03 Run modify-instance-attribute command (OSX/Linux/UNIX) to change (upgrade) the instance type for your previous generation Amazon EC2 instance. As an example, the following command changes the instance type for an EC2 instance, identified by the ID i-01234abcd1234abcd, from c3.large (previous generation) to c5.large (latest generation). If successful, the command request does not produce an output:

aws ec2 modify-instance-attribute
	--region us-east-1
	--instance-id i-01234abcd1234abcd
	--instance-type "{\"Value\": \"c5.large\"}"

04 Run start-instances command (OSX/Linux/UNIX) to restart the configured (upgraded) Amazon EC2 instance. It may take few minutes until the instance enters the running state:

aws ec2 start-instances
	--region us-east-1
	--instance-ids i-01234abcd1234abcd

05 The output should return the start-instances command request information:

{
	"StartingInstances": [
		{
			"InstanceId": "i-01234abcd1234abcd",
			"CurrentState": {
				"Code": 0,
				"Name": "pending"
			},
			"PreviousState": {
				"Code": 80,
				"Name": "stopped"
			}
		}
	]
}

06 Repeat steps no. 1 – 5 for each Amazon EC2 instance that you want to upgrade, available in the selected AWS region.

07 Change the AWS cloud region by updating the --region command parameter value and repeat the Remediation process for other regions.