Terraform Challenge Series - Challenge 1

In this challenge we will deploy several Kubernetes resources using terraform. Utilize /root/terraform_challenge directory to store your Terraform configuration files. Note: kubectl is already installed on the host, you can check your deployments in the usual way.

Architecture :

Solution :

Controlplane

We will start by installing terraform in the controlplane node

apt update
apt install unzip -y
curl -L -o /tmp/terraform_1.1.5_linux_amd64.zip https://releases.hashicorp.com/terraform/1.1.5/terraform_1.1.5_linux_amd64.zip
unzip -d /usr/local/bin /tmp/terraform_1.1.5_linux_amd64.zip
which terraform
terrafomr --version
cd /root/terraform_challenge

Kubernetes-provider

for the kubernets provider we will configure it within provider.tf file.
You can refer to the documentation for this provider, simply go to Terraform Registry and search for hashicorp/kubernetes.
Click on USE PROVIDER button and copy the snippet into provider.tf

terraform {
required_providers {
  kubernetes = {
    source = "hashicorp/kubernetes"
    version = "2.11.0"
    }
  }
}
provider "kubernetes" {
  config_path    = "/root/.kube/config"
}

Now, we can initialize the provider

```
terraform init
```

frontend

Create a terraform resource frontend for kubernetes deployement, you can refere to the documentation for Kubernetes_deployment.
If you are familiar with kubernetes, you can see that the resource shema is arranged similarly to the corresponding YAML manifest.

  resource "kubernetes_deployment" "frontend" {
  metadata {
    name = "frontend"
    labels = {
      name = "frontend"
    }
  }
  spec {
    replicas = 4
    selector {
      match_labels = {
        name = "webapp"
      }
    }
    template {
      metadata {
        labels = {
          name = "webapp"
        }
      }
      spec {
        container {
          image = "kodekloud/webapp-color:v1"
          name  = "simple-webapp"
          port {
            container_port = 8080
          }
        }
      }
    }
  }
}

webapp-service

Create terraform resouce webapp-service for kubernetes service, you can always refere to the provider documentation for kubernetes_service.

  resource "kubernetes_service" "webapp-service" {
  metadata {
    name = "webapp-service"
  }
  spec {
    selector = {
      name = kubernetes_deployment.frontend.spec.0.template.0.metadata.0.labels.name
    }
    port {
      port        = 8080
      target_port = 8080
      node_port   = 30080
    }

    type = "NodePort"
  }
}

Deploy the kubernetes resources

```
terraform plan
terraform apply
```