Knowledge Meant to be Shared: July 2022

Sunday, 17 July 2022

Nginx Ingress on AKS via Terraform

let's continue playing with AKS and this time around , i will be sharing the how to install nginx ingress controller on AKS, this is not new but it is more on my sharing and finding during the process.

First of all , you need to have AKS to begin with , and an app to be publish , it can be a test app some sample app or your own app. i will be utilizing terraform to deploy it .

Prerequisite

1. AKS cluster

2.Terraform installed

3.Helm installed.

Some special requirement that found during the deployment as below

i. Public IP for nginx ingress must be in precreated RG that hold the AKS resource ; MC_rg_aks-name_region

ii. It does not need SPN like traefik and agic deployment

so now we can deploy nginx ingress into our aks, here is my helm setup in terraform

resource "helm_release" "nginx" {
  depends_on = [kubernetes_namespace.nginx]
  namespace = kubernetes_namespace.nginx.metadata[0].name
  name       = "nginx-ingress-controller"
  repository = "https://kubernetes.github.io/ingress-nginx"
  chart      = "ingress-nginx"
  timeout    = 300

  set {
    name  = "controller.service.type"
    value = "LoadBalancer"
  }  
  set {
    name  = "controller.service.loadBalancerIP"
    value = azurerm_public_ip.ngxip.ip_address
  }
  set {
    name  = "controller.service.annotations.service\\.beta\\.kubernetes\\.io/azure-load-balancer-health-probe-request-path"
    value = "/healthz"
  }
}

here is how i cater the public ip resource group

resource "azurerm_public_ip" "ngxip" {
  name                = var.ngxip
  resource_group_name = "MC_${var.aks-rg}_${var.aks-name}_${var.loc}"
  location            = var.loc
  allocation_method   = "Static"
  sku = "Standard"
  sku_tier = "Regional"
  availability_zone = "Zone-Redundant"
}

After you apply your terraform code, then you can test your nginx using the sample app that i used for agic just need to change some parameter on the code