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Terraform to create Kubernetes clusters on multiple public cloud platforms (Aliyun, AWS, Azure, DO, GCP, OCI)

Home Page: https://registry.terraform.io/modules/hajowieland/multi-cloud/kubernetes/

License: GNU General Public License v3.0

HCL 100.00%
terraform kubernetes k8s aws gke aks digitalocean alicloud oci eks

terraform-kubernetes-multi-cloud's Introduction

Terraform Kubernetes Multi-Cloud

Terraform code for creating a handful of simple managed Kubernetes clusters on multiple public cloud platforms.

Managed in this context means the master nodes (= control plane) are managed by the cloud platform provider. We only create the service, the worker nodes and the bare minimum of everything else to get a working K8s cluster.

ℹ️ This is for demonstration and/or learning purposes.

ℹ️ Please do not use this in production.

Link to my comprehensive blog post (beginner friendly):

🔗 https://napo.io/posts/terraform-kubernetes-multi-cloud-ack-aks-dok-eks-gke-oke/

TOC

Public Cloud Platforms

  • ✅ Alibaba Cloud "Managed Kubernetes Cluster Service" (ACK)
  • ✅ Amazon Web Services "Elastic Kubernetes Engine" (EKS)
  • ✅ Digital Ocean "Kubernetes" (DOK)
  • ✅ Google Cloud Platform "Google Kubernetes Engine" (GKE)
  • ✅ Microsoft Azure "Azure Kubernets Service" (AKS)
  • ✅ Oracle Cloud Infrastructure "Container Engine for Kubernetes" (OKE)
  • 🔜 IBM Cloud Kubernetes Service" (IKS) (when their Terraform provider is 0.12-ready)

Features

  • Fully working K8s Clusters
  • Terraform 0.12 code
  • By default creates small node configurations (low costs!)
  • Outputs ready-to-use kubeconfig files at the end
  • 2-3 worker nodes

Requirements

  • Terraform >= 0.12.x
  • You need to have an account on the cloud platforms (of course).

Terraform Inputs

Name Description Type Default Required
enable_alibaba Enable / Disable Alibaba bool false yes
enable_amazon Enable / Disable Amazon bool false yes
enable_digitalocean Enable / Disable DigitalOcean bool false yes
enable_google Enable / Disable Google bool false yes
enable_microsoft Enable / Disable Microsoft bool false yes
enable_oracle Enable / Disable Oracle bool false yes
nodes Kubernetes worker nodes (e.g. 2) number 2 no
ali_access_key Alibaba Cloud AccessKey ID string yes
ali_secret_key Alibaba Cloud Access Key Secret string yes
aws_profile AWS cli profile (e.g. default) string default yes
gcp_project GCP Project ID string yes
az_client_id Azure Service Principal appId string yes
az_client_secret Azure Service Principal password string yes
az_tenant_id Azure Service Principal tenant string yes
do_token Digital Ocean personal access (API) token string yes
oci_user_ocid OCI User OCID string yes
oci_tenancy_ocid OCI Tenancy OCID string yes
oci_fingerprint OCI SSH public key fingerprint string yes

TODO

  • Combine multiple kubeconfig files into one
  • (partly implemented): Allow K8s API access only from workstation IP
  • Fix OCI destroy dependencies

terraform-kubernetes-multi-cloud's People

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terraform-kubernetes-multi-cloud's Issues

terraform plan errors

My terraform.tfvars is:

enable_amazon = true
nodes = 3
aws_profile = "default"
enable_microsoft = false

TF version:

~/terraform-kubernetes-multi-cloud$ terraform version
Terraform v0.12.18
+ provider.alicloud v1.68.0
+ provider.aws v2.43.0
+ provider.azurerm v1.39.0
+ provider.digitalocean v1.12.0
+ provider.external v1.2.0
+ provider.google v3.3.0
+ provider.http v1.1.1
+ provider.local v1.4.0
+ provider.null v2.1.2
+ provider.oci v3.56.0
+ provider.random v2.2.1
+ provider.template v2.1.2
~/terraform-kubernetes-multi-cloud$

After terraform init I'm getting:

~/terraform-kubernetes-multi-cloud$ terraform plan

Warning: "agent_pool_profile": [DEPRECATED] This has been replaced by `default_node_pool` and will be removed in version 2.0 of the AzureRM Provider

  on .terraform/modules/microsoft/hajowieland-terraform-azurerm-k8s-a3499e1/main.tf line 45, in resource "azurerm_kubernetes_cluster" "aks":
  45: resource "azurerm_kubernetes_cluster" "aks" {

Error: Error in function call

  on .terraform/modules/google/hajowieland-terraform-google-k8s-82c6fb4/provider.tf line 3, in provider "google":
   3:   credentials = file("account.json")

Call to function "file" failed: no file exists at account.json.

~/terraform-kubernetes-multi-cloud$

After I commented module "google" { and resource "local_file" "kubeconfiggke" { in main.tf:

~/terraform-kubernetes-multi-cloud$ terraform plan
Refreshing Terraform state in-memory prior to plan...
The refreshed state will be used to calculate this plan, but will not be
persisted to local or remote state storage.

module.amazon.data.http.workstation-external-ip[0]: Refreshing state...
module.amazon.data.aws_region.current[0]: Refreshing state...
module.amazon.data.aws_availability_zones.available[0]: Refreshing state...

Warning: "agent_pool_profile": [DEPRECATED] This has been replaced by `default_node_pool` and will be removed in version 2.0 of the AzureRM Provider

  on .terraform/modules/microsoft/hajowieland-terraform-azurerm-k8s-a3499e1/main.tf line 45, in resource "azurerm_kubernetes_cluster" "aks":
  45: resource "azurerm_kubernetes_cluster" "aks" {

Error: can not create client, bad configuration: did not find a proper configuration for tenancy

  on <empty> line 0:
  (source code not available)

Error: Error building AzureRM Client: Azure CLI Authorization Profile was not found. Please ensure the Azure CLI is installed and then log-in with `az login`.

  on .terraform/modules/microsoft/hajowieland-terraform-azurerm-k8s-a3499e1/provider.tf line 1, in provider "azurerm":
   1: provider "azurerm" {

~/terraform-kubernetes-multi-cloud$

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