Create an AWS Lambda function that is invoked by an Amazon CloudWatch Events rule when a CreateVpcPeeringConnection API call is made. The Lambda function should check the source of the peering request, accepts the request, and update the route tables for the management VPC to allow traffic to go over the peering connection.

In the CloudFormation template:Invoke a custom resource to generate unique VPC CIDR ranges for the VPC and subnets.Create a peering connection to the management VPC.Update route tables to allow traffic to the management VPC.

In the CloudFormation template:Use the Fn::Cidr function to allocate an unused CIDR range for the VPC and subnets.Create a peering connection to the management VPC.Update route tables to allow traffic to the management VPC.

Modify the CloudFormation template to include a mappings object that includes a list of /16 CIDR ranges for each account where the stack will be deployed.

Use CloudFormation StackSets to deploy the VPC and associated resources to multiple AWS accounts using a custom resource to allocate unique CIDR ranges. Create peering connections from each VPC to the central management VPC and accept those connections in the management VPC.

Allow inbound access to TCP port 22 in all associated EC2 security groups from the VPC CIDR range.

Attach an IAM policy with the necessary Systems Manager permissions to the existing IAM instance profile.

Create a VPC endpoint for Systems Manager in the desired Region.

Deploy a new EC2 instance that will act as a bastion host to the rest of the EC2 instance fleet.

Remove any default routes in the associated route tables.

Write a shell script to run as a cron job on EC2 instances to collect and push the data to Amazon S3. For on-premises resources, use VMware vSphere to collect the data and write it into a file gateway for storing the data in S3. Finally, use Amazon Athena on the S3 bucket for analytics.

Use a script on the on-premises virtual machines as well as the EC2 instances to gather and push the data into Amazon S3, and then use Amazon Athena for analytics.

Install AWS Systems Manager agents on both the on-premises virtual machines and the EC2 instances. Enable inventory collection and configure resource data sync to an Amazon S3 bucket to analyze the data with Amazon Athena.

Use AWS Application Discovery Service for deploying Agentless Discovery Connector in the VMware environment and Discovery Agents on the EC2 instances for collecting the data. Then use the AWS Migration Hub Dashboard for analytics.