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wesalEldesouky1 / EKS-with-terraform-

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Create new code #3

Closed wesalEldesouky1 closed 8 months ago

wesalEldesouky1 commented 8 months ago

I want to edit this terraform code to create 2 child module one for VPC module and another one for eks cluster on AWS

codeautopilot[bot] commented 8 months ago

Potential solution

To create two child modules, one for the VPC and another for the EKS cluster on AWS, we will define input variables, resources, and outputs for each module. The VPC module will handle the creation of the VPC, subnets, and related networking components, while the EKS module will create the EKS cluster and node groups. The main.tf in the root directory will call both modules and pass necessary variables to them.

How to implement

For the VPC module (vpc/ directory):

  1. Define input variables in vpc/variables.tf as provided in the task.
  2. Create resources in vpc/main.tf using the defined variables. Ensure that the resource names match those referenced in the outputs file.
  3. Define output variables in vpc/outputs.tf to expose the VPC ID, subnet IDs, and other relevant information.

For the EKS module (eks/ directory):

  1. Define input variables in eks/variables.tf as provided in the task.
  2. Create resources in eks/main.tf using the defined variables. This includes the EKS cluster, node groups, and necessary IAM roles and policies.
  3. Define output variables in eks/outputs.tf to expose the EKS cluster ID, endpoint, and other relevant information.

In the root directory (main.tf):

  1. Call both the VPC and EKS modules, providing the necessary input variables.
  2. Use outputs from the VPC module as inputs for the EKS module where needed (e.g., vpc_id and subnet_ids).
  3. Define outputs in the root main.tf to expose the VPC ID, subnet IDs, EKS cluster ID, and other relevant information.

Ensure that all variables and resources are named consistently across the files and that the outputs are correctly referencing the created resources. The provided code snippets in the task can be used as a starting point, and additional configurations can be added as needed for specific use cases.

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Files used for this task:

Changes on vpc/variables.tf To solve the task for the `vpc/variables.tf` file, we need to define the input variables that will be used to configure the VPC resources. Here's a practical proposal for the variables that should be included in this file: ```hcl variable "vpc_cidr" { description = "The CIDR block for the VPC." type = string } variable "public_subnet_cidrs" { description = "A list of CIDR blocks for the public subnets." type = list(string) } variable "private_subnet_cidrs" { description = "A list of CIDR blocks for the private subnets." type = list(string) } variable "enable_dns_hostnames" { description = "Should be true to enable DNS hostnames in the VPC." type = bool default = true } variable "enable_dns_support" { description = "Should be true to enable DNS support in the VPC." type = bool default = true } variable "tags" { description = "A map of tags to add to all resources." type = map(string) default = {} } // Add any other variables that are required for your VPC setup. ``` This file defines the necessary variables for creating a VPC with public and private subnets. It includes the VPC CIDR block, lists of CIDR blocks for public and private subnets, DNS settings, and a map for tagging the resources. Users can provide values for these variables when they use the VPC module in their Terraform configurations. Additional variables can be added as needed for specific use cases or requirements.
Changes on eks/variables.tf To define the input variables for the `eks/variables.tf` file, we need to consider what parameters are necessary for creating an EKS cluster. Here's a practical proposal for the variables that should be included in this file: ```hcl variable "cluster_name" { description = "The name of the EKS cluster." type = string } variable "kubernetes_version" { description = "The desired Kubernetes version for the EKS cluster." type = string default = "1.21" // You can set a default version or make it mandatory for the user to provide one. } variable "node_group" { description = "A map of maps defining node group configurations." type = map(object({ instance_type = string desired_capacity = number min_capacity = number max_capacity = number })) default = { default = { instance_type = "t3.medium" desired_capacity = 2 min_capacity = 1 max_capacity = 3 } } } variable "vpc_id" { description = "The VPC ID where the EKS cluster and node groups will be created." type = string } variable "subnet_ids" { description = "A list of subnet IDs where the EKS node groups will be placed." type = list(string) } // Add any additional variables that might be required for your EKS setup. ``` This `variables.tf` file defines the necessary variables for creating an EKS cluster, including the cluster name, Kubernetes version, node group configuration, and networking information. The `node_group` variable is a map of maps, allowing for the definition of multiple node groups if needed. Default values are provided for the Kubernetes version and node group configuration to simplify the module usage, but these can be overridden by the user when applying the Terraform configuration.
Changes on vpc/outputs.tf To solve the task for the `vpc/outputs.tf` file, we need to define the output variables that will expose the necessary information from the VPC module to other modules or the root module. Here's a practical proposal for the outputs you might want to include: ```hcl output "vpc_id" { description = "The ID of the VPC" value = aws_vpc.main.id } output "subnet_ids" { description = "The IDs of the subnets" value = [for subnet in aws_subnet.main : subnet.id] } output "internet_gateway_id" { description = "The ID of the Internet Gateway" value = aws_internet_gateway.main.id } output "route_table_ids" { description = "The IDs of the route tables" value = [for rt in aws_route_table.main : rt.id] } // Add additional outputs as needed for other resources like NAT Gateways, Security Groups, etc. ``` In this example, we're assuming that you have resources named `aws_vpc.main`, `aws_subnet.main`, `aws_internet_gateway.main`, and `aws_route_table.main` defined in your `vpc/main.tf`. The `for` syntax in the `subnet_ids` and `route_table_ids` outputs is used to create a list of IDs from the subnet and route table resources, respectively. Make sure to replace the resource names with the actual names used in your `vpc/main.tf` file. If you have multiple subnets or route tables, ensure that the resource names and references match. This output configuration will allow other Terraform modules to reference the VPC ID, subnet IDs, Internet Gateway ID, and route table IDs after the VPC module has been applied.
Changes on eks/outputs.tf To solve the task for the `eks/outputs.tf` file, we need to define the output variables that will expose necessary information about the EKS cluster to other modules or the root Terraform configuration. Here's a practical proposal for the content of the `eks/outputs.tf` file: ```hcl output "cluster_id" { description = "The ID of the EKS cluster." value = aws_eks_cluster.my_cluster.id } output "cluster_endpoint" { description = "The endpoint for your EKS Kubernetes API." value = aws_eks_cluster.my_cluster.endpoint } output "cluster_security_group_id" { description = "The security group ID attached to the EKS cluster." value = aws_eks_cluster.my_cluster.vpc_config[0].security_group_ids } output "cluster_certificate_authority_data" { description = "The base64 encoded certificate data required to communicate with your cluster." value = aws_eks_cluster.my_cluster.certificate_authority[0].data } output "node_group_iam_role_arn" { description = "The IAM role ARN for the EKS node group." value = aws_eks_node_group.my_node_group.node_role_arn } output "node_group_status" { description = "The status of the EKS node group." value = aws_eks_node_group.my_node_group.status } ``` Please note that the resource names `aws_eks_cluster.my_cluster` and `aws_eks_node_group.my_node_group` are placeholders. You will need to replace them with the actual resource names used in your `eks/main.tf` file. This code snippet defines six outputs: 1. `cluster_id`: Outputs the ID of the EKS cluster. 2. `cluster_endpoint`: Outputs the endpoint URL for the EKS cluster API. 3. `cluster_security_group_id`: Outputs the security group ID associated with the EKS cluster. 4. `cluster_certificate_authority_data`: Outputs the certificate authority data for the EKS cluster. 5. `node_group_iam_role_arn`: Outputs the IAM role ARN for the EKS node group. 6. `node_group_status`: Outputs the status of the EKS node group. Make sure to apply this configuration after you have defined the corresponding resources in your `eks/main.tf` file. The output values should reference the actual attributes of the resources you have created.
Changes on main.tf To solve the task for the `main.tf` file, we need to create a Terraform configuration that includes both the VPC and EKS modules, passing the necessary input variables to each. Here's a practical proposal for the `main.tf` file: ```hcl module "vpc" { source = "./vpc" // Define the required variables for the VPC module vpc_cidr = "10.0.0.0/16" public_subnet_cidrs = ["10.0.1.0/24", "10.0.2.0/24"] private_subnet_cidrs = ["10.0.3.0/24", "10.0.4.0/24"] // Add any other required variables for the VPC module } module "eks" { source = "./eks" // Define the required variables for the EKS module cluster_name = "my-eks-cluster" kubernetes_version = "1.21" node_group = { name = "my-node-group" instance_type = "t3.medium" desired_capacity = 2 max_capacity = 3 min_capacity = 1 } vpc_id = module.vpc.vpc_id subnet_ids = module.vpc.private_subnet_ids // Add any other required variables for the EKS module } output "vpc_id" { value = module.vpc.vpc_id } output "subnet_ids" { value = module.vpc.subnet_ids } output "eks_cluster_id" { value = module.eks.cluster_id } output "eks_cluster_endpoint" { value = module.eks.cluster_endpoint } output "eks_node_group_role_arn" { value = module.eks.node_group_role_arn } ``` In this configuration: - We declare two modules, `vpc` and `eks`, each pointing to their respective directories. - We pass the necessary input variables to each module. For the VPC module, we define the CIDR blocks for the VPC and subnets. For the EKS module, we define the cluster name, Kubernetes version, and node group configuration. - We also pass the VPC ID and subnet IDs from the VPC module to the EKS module, as the EKS cluster needs to be associated with a specific VPC and subnets. - Finally, we define outputs for the main configuration file, which will expose the VPC ID, subnet IDs, EKS cluster ID, endpoint, and node group role ARN. This is a basic example, and you may need to adjust the variable names and values according to your specific requirements and the variables defined in the `vpc/variables.tf` and `eks/variables.tf` files.
Changes on vpc/main.tf To solve the task for the `vpc/main.tf` file, we need to create Terraform code that defines the necessary AWS VPC resources. Here is a practical proposal for the content of the `vpc/main.tf` file: ```hcl provider "aws" { region = var.region } resource "aws_vpc" "main" { cidr_block = var.vpc_cidr tags = { Name = "main-vpc" } } resource "aws_subnet" "public" { count = length(var.public_subnets) vpc_id = aws_vpc.main.id cidr_block = var.public_subnets[count.index] availability_zone = data.aws_availability_zones.available.names[count.index] map_public_ip_on_launch = true tags = { Name = "public-subnet-${count.index}" } } resource "aws_subnet" "private" { count = length(var.private_subnets) vpc_id = aws_vpc.main.id cidr_block = var.private_subnets[count.index] availability_zone = data.aws_availability_zones.available.names[count.index] tags = { Name = "private-subnet-${count.index}" } } resource "aws_internet_gateway" "main" { vpc_id = aws_vpc.main.id tags = { Name = "main-igw" } } resource "aws_route_table" "public" { vpc_id = aws_vpc.main.id route { cidr_block = "0.0.0.0/0" gateway_id = aws_internet_gateway.main.id } tags = { Name = "public-route-table" } } resource "aws_route_table_association" "public" { count = length(var.public_subnets) subnet_id = aws_subnet.public[count.index].id route_table_id = aws_route_table.public.id } # Additional resources like NAT gateways, private route tables, etc., can be added as needed. ``` This code snippet includes the following resources: - An AWS VPC (`aws_vpc`) with a CIDR block specified by a variable. - A set of public subnets (`aws_subnet`) with a count based on the length of the `public_subnets` variable and an internet gateway (`aws_internet_gateway`). - A set of private subnets (`aws_subnet`) with a count based on the length of the `private_subnets` variable. - A public route table (`aws_route_table`) with a default route to the internet gateway. - Route table associations (`aws_route_table_association`) for the public subnets. Please note that this is a basic setup and can be expanded with additional resources like NAT gateways for private subnets, network ACLs, security groups, etc., depending on the specific requirements. The variables `region`, `vpc_cidr`, `public_subnets`, and `private_subnets` will need to be defined in the `vpc/variables.tf` file, and the outputs such as VPC ID and subnet IDs will need to be defined in the `vpc/outputs.tf` file.
Changes on eks/main.tf To solve the task for the `eks/main.tf` file, we need to create the necessary Terraform configuration to provision an AWS EKS cluster and its associated resources. Below is a practical proposal for the content of the `eks/main.tf` file: ```hcl provider "aws" { region = var.region } resource "aws_eks_cluster" "example" { name = var.cluster_name role_arn = aws_iam_role.eks_cluster.arn vpc_config { subnet_ids = var.subnet_ids } depends_on = [ aws_iam_role_policy_attachment.eks_cluster_AmazonEKSClusterPolicy, aws_iam_role_policy_attachment.eks_cluster_AmazonEKSServicePolicy, ] } resource "aws_iam_role" "eks_cluster" { name = "example-eks-cluster" assume_role_policy = jsonencode({ Version = "2012-10-17", Statement = [ { Effect = "Allow", Principal = { Service = "eks.amazonaws.com" }, Action = "sts:AssumeRole" }, ] }) } resource "aws_iam_role_policy_attachment" "eks_cluster_AmazonEKSClusterPolicy" { policy_arn = "arn:aws:iam::aws:policy/AmazonEKSClusterPolicy" role = aws_iam_role.eks_cluster.name } resource "aws_iam_role_policy_attachment" "eks_cluster_AmazonEKSServicePolicy" { policy_arn = "arn:aws:iam::aws:policy/AmazonEKSServicePolicy" role = aws_iam_role.eks_cluster.name } resource "aws_eks_node_group" "example" { cluster_name = aws_eks_cluster.example.name node_group_name = "example-node-group" node_role_arn = aws_iam_role.eks_node.arn subnet_ids = var.subnet_ids scaling_config { desired_size = var.node_group_desired_size max_size = var.node_group_max_size min_size = var.node_group_min_size } depends_on = [ aws_iam_role_policy_attachment.eks_worker_AmazonEKSWorkerNodePolicy, aws_iam_role_policy_attachment.eks_worker_AmazonEKS_CNI_Policy, aws_iam_role_policy_attachment.eks_worker_AmazonEC2ContainerRegistryReadOnly, ] } resource "aws_iam_role" "eks_node" { name = "example-eks-node" assume_role_policy = jsonencode({ Version = "2012-10-17", Statement = [ { Effect = "Allow", Principal = { Service = "ec2.amazonaws.com" }, Action = "sts:AssumeRole" }, ] }) } resource "aws_iam_role_policy_attachment" "eks_worker_AmazonEKSWorkerNodePolicy" { policy_arn = "arn:aws:iam::aws:policy/AmazonEKSWorkerNodePolicy" role = aws_iam_role.eks_node.name } resource "aws_iam_role_policy_attachment" "eks_worker_AmazonEKS_CNI_Policy" { policy_arn = "arn:aws:iam::aws:policy/AmazonEKS_CNI_Policy" role = aws_iam_role.eks_node.name } resource "aws_iam_role_policy_attachment" "eks_worker_AmazonEC2ContainerRegistryReadOnly" { policy_arn = "arn:aws:iam::aws:policy/AmazonEC2ContainerRegistryReadOnly" role = aws_iam_role.eks_node.name } ``` This configuration includes the following: - An EKS cluster with a specified name and role. - An IAM role for the EKS cluster with the necessary policy attachments. - An EKS node group with a specified name, role, and scaling configuration. - An IAM role for the EKS nodes with the necessary policy attachments. The variables `var.region`, `var.cluster_name`, `var.subnet_ids`, `var.node_group_desired_size`, `var.node_group_max_size`, and `var.node_group_min_size` will need to be defined in the `eks/variables.tf` file. Please note that this is a basic example and might need to be adjusted based on specific requirements such as the Kubernetes version, additional EKS configurations, or specific IAM policies.