AWS-EKS

Basic terraform code for creating AWS EKS Cluster

Pre-requisites:

1. Install a. Terraform b. AWS_CLI c. AWS_IAM_Authenticator d. Kubectl
2. Create AWS account
3. Create IAM user and attach permissions

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Providers:

1. AWS 3.72.0
2. Kubernetes 2.7.0

Modules:

1. eks 18.2.0
2. vpc 3.11.3

Data Sources:

1. aws_availability_zones : The Availability Zones data source allows access to the list of AWS Availability Zones which can be accessed by an AWS account within the region configured in the provider.
2. aws_eks_cluster : Retrieve information about an EKS Cluster
3. aws_eks_cluster_auth : Get an authentication token to communicate with an EKS cluster.

Inputs:

provider aws:- region : AWS Region in which EKS Cluster is planned create.

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module eks:-

1. cluster_name: Name of the EKS cluster
2. cluster_version: Kubernetes . version to use for the EKS cluster (i.e.: 1.21)
3. eks_managed_node_groups: Map of EKS managed node group definitions to create
4. subnet_ids: A list of subnet IDs where the EKS cluster (ENIs) will be provisioned along with the nodes/node groups.
5. vpc_id: ID of the VPC where the cluster and its nodes will be provisioned

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module vpc:-

1. azs: A list of availability zones names or ids in the region
2. cidr: The CIDR block for the VPC
3. enable_nat_gateway: Should be true if you want to provision NAT Gateways for each of your private networks
4. enable_vpn_gateway: Should be true if you want to create a new VPN Gateway resource and attach it to the VPC
5. enable_dns_hostnames: Should be true to enable DNS hostnames in the VPC
6. private_subnets: A list of private subnets inside the VPC
7. public_subnets: A list of public subnets inside the VPC provider kubernetes:- host - The hostname (in form of URI) of the Kubernetes API. cluster_ca_certificate - PEM-encoded root certificates bundle for TLS authentication. token - Token of your service account.

Readings:

1. https://docs.aws.amazon.com/eks/latest/userguide/what-is-eks.html
2. https://registry.terraform.io/modules/terraform-aws-modules/eks/aws/latest
3. https://registry.terraform.io/modules/terraform-aws-modules/vpc/aws/latest
4. https://docs.aws.amazon.com/vpc/latest/userguide/VPC_Subnets.html
5. https://www.terraform.io/language
6. https://registry.terraform.io/providers/hashicorp/kubernetes/latest/docs#credentials-config
7. https://learn.hashicorp.com/terraform