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Lessons (12)

• VPC Networking Without the Confusion

  … load balancer] ALB -- APP[Private subnet: app] APP -- DB[Private subnet: database] “Public” does not mean a subnet …

• Dependencies, Data Sources, and Resource Lifecycle

  … Terraform creates the VPC before the subnet and destroys the subnet before the VPC. Independent resources can run …

• Count, for_each, Functions, and Stable Identities

  … subnet math. hcl locals { common tags = { ManagedBy = "Terraform", Team = "platform" } tags = merge(local.common tags, { Environment = "dev" }) subnet …

• VPC Endpoints, Transit Gateway and Hybrid Networking

  … Route table of the source subnet has a route to the target. 2. Security group on both ends …

• Practical Project: Deploy a Real CRM App on EKS

  … Create the cluster and node group eksctl creates the VPC, public and private subnets, NAT gateway, IAM roles …

• AWS Databases: Choose the Right One

  … Put the database in a DB subnet group using private subnets spanning the required AZs. Disable public accessibility …

• AWS Interview Questions: Clear Answers

  … A private subnet normally has no direct internet-gateway route. A NAT route can permit outbound IPv4 access …

• Containers at Scale: ECS Deep Dive and EKS

  … Plan subnet sizes, or use prefix delegation or custom networking if IPs run out. - Use the AWS Load …

• Run Containers on AWS with ECR and ECS

  … Create an ECS service in private subnets. 4. Put an ALB in front of it and configure a …

• Drift, Troubleshooting, and Disaster Recovery

  … automatic rollback Suppose Terraform creates a VPC and subnet, then fails to create another resource because of an …

• Multi-Account Strategy, Governance and Security Operations

  … deep dive). - Use AWS RAM to share resources (subnets, Transit Gateway) instead of duplicating them. Detective controls: know …

• EC2, Storage and Auto Scaling

  … Use a public subnet with an internet-gateway route and assign a public IPv4 address for this temporary …