Contents - ethernetdude - Kapil Kanth

06. Forks, Pull Request & Code Reviews

Alright, so far we’ve covered the core commands. You know how to initialize repos, use branches, undo mistakes, & push things to GitHub. Pretty much fully self-sufficient. But in real engineering environments, it’s rarely a solo effort. Whether you’re working…

Terraform Practice Lab

TFLAB12-dynamic Blocks: Generating Repeated Nested Blocks

dynamic Blocks: Generating Repeated Nested Blocks 🔧 Terraform Core ⭐ Intermediate dynamic content {} iterator Nested Blocks Scenario You are managing a security group that needs 8 different ingress rules — one for SSH, HTTP, HTTPS, a monitoring port, and…

Multicast

Article 01: Multicast Fundamentals Lab Why Unicast Fails at Scale

Let me tell you something that took me an embarrassing amount of time to truly appreciate early in my career. I understood multicast conceptually “send once, deliver to many” but I never actually saw unicast fail until I sat in…

Terraform-AWS-Labs

LAB34_AWS_Cross-Account S3 Replication with KMS Encryption

Cross-Account S3 Replication with KMS Encryption ☁ AWS 🔥 Advanced S3 Replication Cross-Account KMS Assume Role Provider Aliases Scenario Your compliance team requires that all objects uploaded to the production S3 bucket in Account A are automatically replicated to a…

Terraform-AWS-Labs

LAB35_AWS_VPC Peering: Connecting Application and Data VPCs Privately

VPC Peering: Connecting Application and Data VPCs Privately ☁ AWS 🔥 Advanced VPC Peering Route Tables Security Groups DNS Hostnames Non-Overlapping CIDRs Scenario Your organisation uses two VPCs: an application VPC (10.0.0.0/16) running ECS workloads, and a data VPC (10.1.0.0/16)…

Terraform-AWS-Labs

LAB36_AWS_Compliance Automation: AWS Config Rules + Lambda Auto-Remediation

Compliance Automation: AWS Config Rules + Lambda Auto-Remediation ☁ AWS 🔥 Advanced AWS Config Config Rules Auto-Remediation SNS Systems Manager Scenario Your security team’s compliance scan revealed that S3 buckets with public access enabled and EC2 instances without required tags…

Terraform-AWS-Labs

LAB37_AWS_Transit Gateway: Hub-and-Spoke Multi-VPC Connectivity

Transit Gateway: Hub-and-Spoke Multi-VPC Connectivity ☁ AWS 🔥 Advanced Transit Gateway Hub-and-Spoke Route Tables TGW Attachments Transitive Routing Scenario Your organisation has three VPCs: App, Shared Services (DNS, Active Directory), and Egress (with a NAT Gateway for shared internet access).…

Terraform-AWS-Labs

LAB23_AWS_Terraform `for_each`: Map-Driven Resource Creation

Terraform for_each: Map-Driven Resource Creation ☁ AWS ⭐ Beginner for_each each.key / each.value toset() for expressions Scenario Your organisation needs to create multiple IAM users for a new development team, each with different access levels. You also need to create…

Terraform-AWS-Labs

LAB24_AWS_Input Variables: Validation Rules, Types, and Sensitive Values

Input Variables: Validation Rules, Types, and Sensitive Values ☁ AWS ⭐ Beginner Variable Validation Type Constraints Sensitive Variables tfvars locals Scenario Your Terraform modules are being used by multiple teams who occasionally pass invalid values — wrong environment names, invalid…

Terraform-AWS-Labs

LAB25_AWS_S3 Remote State with DynamoDB Locking and Workspaces

S3 Remote State with DynamoDB Locking and Workspaces ☁ AWS ⭐ Beginner Remote State S3 Backend DynamoDB Locking Workspaces terraform.tfstate Scenario Your team has been running Terraform on individual laptops with local state files. Two engineers ran terraform apply simultaneously…