This is a simple example of how to deploy the Kubernetes Dashboard and Metrics Server using Terraform and Helm on Docker Desktop.
Step 1 - Start the local Kubernetes cluster from Docker Desktop
Go to Docker Desktop > Preferences > Kubernetes > Enable Kubernetes and click Apply & Restart
Optional Step 2 - Set the kubectl context to Docker Desktop
If you have multiple kubectl contexts, you can set the current context to Docker Desktop using the following command:
kubectl config use-context docker-desktop
Step 3 - Install Terraform for macOs (if not already installed)
Download and install Terraform from https://www.terraform.io/downloads.html
brew tap hashicorp/tap && brew install hashicorp/tap/terraform
Step 4 - Clone repository
git clone https://github.com/garis-space/tf-helm-kubernetes-dashboard-and-metrics-server.git
cd tf-helm-kubernetes-dashboard-and-metrics-server
In the root directory of this repository, you will find a main.tf file which contains the Terraform configuration to deploy the Kubernetes Dashboard and Metrics Server.
terraform {
required_providers {
# Kubernetes provider
kubernetes = {
source = "hashicorp/kubernetes"
}
# Helm provider
helm = {
source = "hashicorp/helm"
}
}
}
# Path to config file for the Kubernetes provider as variable
variable "kubeconfig" {
type = string
# Load the kubeconfig from your home directory (default location for Docker Desktop Kubernetes)
default = "~/.kube/config"
}
# Kubernetes provider configuration
provider "kubernetes" {
config_path = var.kubeconfig
}
# Helm provider configuration
provider "helm" {
# Local Kubernetes cluster from Docker Desktop
kubernetes {
# Load the kubeconfig from your home directory
config_path = var.kubeconfig
}
}
###
# Create a new Kubernetes namespace for the application deployment
###
resource "kubernetes_namespace" "kubernetes_dashboard" {
metadata {
name = "kubernetes-dashboard"
}
}
###
# Install the Kubernetes Dashboard using the Helm provider
###
resource "helm_release" "kubernetes_dashboard" {
# Name of the release in the cluster
name = "kubernetes-dashboard"
# Name of the chart to install
repository = "https://kubernetes.github.io/dashboard/"
# Version of the chart to use
chart = "kubernetes-dashboard"
# Wait for the Kubernetes namespace to be created
depends_on = [kubernetes_namespace.kubernetes_dashboard]
# Set the namespace to install the release into
namespace = kubernetes_namespace.kubernetes_dashboard.metadata[0].name
# Set service type to LoadBalancer
set {
name = "service.type"
value = "LoadBalancer"
}
# Set service external port to 9080
set {
name = "service.externalPort"
value = "9080"
}
# Set protocol to HTTP (not HTTPS)
set {
name = "protocolHttp"
value = "true"
}
# Enable insecure login (no authentication)
set {
name = "enableInsecureLogin"
value = "true"
}
# Enable cluster read only role (no write access) for the dashboard user
set {
name = "rbac.clusterReadOnlyRole"
value = "true"
}
# Enable metrics scraper (required for the CPU and memory usage graphs)
set {
name = "metricsScraper.enabled"
value = "true"
}
# Wait for the release to be deployed
wait = true
}
###
# Install the Metrics Server using the Helm provider
###
resource "helm_release" "metrics_server" {
# Name of the release in the cluster
name = "metrics-server"
# Name of the chart to install
repository = "https://kubernetes-sigs.github.io/metrics-server/"
# Version of the chart to use
chart = "metrics-server"
# Wait for the Kubernetes Dashboard and Kubernetes namespace to be created
depends_on = [helm_release.kubernetes_dashboard, kubernetes_namespace.kubernetes_dashboard]
# Set the namespace to install the release into
namespace = kubernetes_namespace.kubernetes_dashboard.metadata[0].name
# Recent updates to the Metrics Server do not work with self-signed certificates by default.
# Since Docker For Desktop uses such certificates, you’ll need to allow insecure TLS
set {
name = "args"
value = "{--kubelet-insecure-tls=true}"
}
# Wait for the release to be deployed
wait = true
}
# Output metadata of the Kubernetes Dashboard release
output "kubernetes_dashboard_service_metadata" {
value = helm_release.kubernetes_dashboard.metadata
}
# Output metadata of the Metrics Server release
output "metrics_server_service_metadata" {
value = helm_release.metrics_server.metadata
}
# Output the URL of the Kubernetes Dashboard
output "kubernetes_dashboard_url" {
value = "http://localhost:9080"
}
Step 5 - Initialize Terraform
terraform init
Step 6 - Deploy the Kubernetes Dashboard and Metrics Server
terraform apply
Step 7 - Access the Kubernetes Dashboard
# Open the Kubernetes Dashboard (please wait a few minutes for the Kubernetes Dashboard to start and the Metrics Server to collect data)
open https://localhost:9080
Optional Step 8 - Clean up
terraform destroy
Top comments (1)
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