use prometheus stack helm chart as pre-requisite

.github/workflows/local_k8s.yml

@@ -66,7 +66,10 @@ jobs:
     # hack: for having CRDs available, install helm chart then remove right after
     - name: Install kube-prometheus-stack helm chart
       run: helm repo add prometheus-community https://prometheus-community.github.io/helm-charts && helm repo update && helm install prometheus-stack prometheus-community/kube-prometheus-stack && helm uninstall prometheus-stack
-
+
+    - name: Create monitoring namespace
+      run: kubectl create ns monitoring
+
     #### Terraforming
     - name: 'Terragrunt Init'
       run: cd $tf_working_dir && terragrunt init

environments/.terraform-version

@@ -1 +1 @@
-1.1.7
+1.5.0

environments/.terragrunt-version

@@ -1 +1 @@
-0.36.6
+0.47.0

environments/terragrunt.hcl

@@ -13,7 +13,7 @@ generate "provider" {
       required_providers {
         kubernetes = {
           source  = "hashicorp/kubernetes"
-          version = "2.20.0"
+          version = "2.21.1"
         }
         helm = {
           source = "hashicorp/helm"

readme.md

@@ -31,6 +31,11 @@ As I use nginx as my ingress controller, I needed to disable Traefik on K3D.
 The cluster's load balancer will be available via ports 80 and 443
 `k3d cluster create -p "80:80@loadbalancer" -p "443:443@loadbalancer" --k3s-arg="--disable=traefik@server:0"`
 
+For the sake of having some ears and eyes for what's going on there on our cluster, we need some monitoring:
+
+Install [Kube Prometheus Stack](https://github.com/prometheus-community/helm-charts/tree/main/charts/kube-prometheus-stack) for cluster monitoring.
+`helm install -n monitoring -f terraform/modules/monitoring/config/monitoring.yaml kube-prometheus-stack  prometheus-community/kube-prometheus-stack`
+
 When your k3d backed Kubernetes is ready, you're also ready to deploy the stack using Terragrunt.
 
 `cd environment/dev && terragrunt apply -auto-approve`

start.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# start k3d cluster with nginx (and with disabled traefik)
+echo "Starting K3d cluster"
+k3d cluster create -p "80:80@loadbalancer" -p "443:443@loadbalancer" --k3s-arg="--disable=traefik@server:0" > /dev/null 2>&1 && echo "K3d cluster started"
+
+echo "Creating Kubernetes namespace: monitoring"
+kubectl create namespace monitoring > /dev/null 2>&1
+
+# install kube prometheus stack helm chart
+echo "Installing Kube Prometheus Stack"
+helm repo add prometheus-community https://prometheus-community.github.io/helm-charts && helm repo update && helm install -n monitoring -f terraform/modules/monitoring/config/monitoring.yaml kube-prometheus-stack  prometheus-community/kube-prometheus-stack > /dev/null 2>&1 && echo "Kube Prometheus Stack installed"
+
+echo "Running Terraform"
+cd environments/dev && terragrunt init > /dev/null 2>&1 && terragrunt apply -auto-approve > /dev/null 2>&1 && echo "Terraform apply was successful"

terraform/main.tf

@@ -8,9 +8,6 @@ module "ingress" {
 }
 
 module "wordpress" {
-  depends_on = [
-    module.monitoring
-  ]
   source = "./modules/wordpress"
   stage = var.stage
   hostname = var.hostname

terraform/modules/ingress/main.tf

@@ -9,6 +9,6 @@ resource "helm_release" "ingress-nginx" {
   atomic           = true
 
   values = [
-    "${file("${path.module}/templates/ingress-nginx-values.yaml")}"
+    file("${path.module}/templates/ingress-nginx-values.yaml")
   ]
 }

terraform/modules/monitoring/config/monitoring.yaml

@@ -55,7 +55,7 @@ grafana:
         access: proxy
       - name: Prometheus
         type: prometheus
-        url: http://prometheus-community-kube-prometheus.monitoring:9090/
+        url: http://kube-prometheus-stack-prometheus.monitoring:9090/
         access: proxy
   adminUser: admin
   adminPassword: a12sdf

terraform/modules/monitoring/ingress.tf

@@ -1,7 +1,7 @@
 resource "kubernetes_ingress_v1" "grafana" {
    metadata {
       name        = "grafana"
-      namespace = kubernetes_namespace.monitoring.metadata[0].name
+      namespace = data.kubernetes_namespace.monitoring.metadata[0].name
       annotations = {
         "nginx.ingress.kubernetes.io/rewrite-target" = "/"
       }
@@ -16,7 +16,7 @@ resource "kubernetes_ingress_v1" "grafana" {
            path_type = "Prefix"
            backend {
              service {
-               name = "prometheus-community-grafana"
+               name = "kube-prometheus-stack-grafana"
                port {
                  name = "http-web"
                }
@@ -31,7 +31,7 @@ resource "kubernetes_ingress_v1" "grafana" {
 resource "kubernetes_ingress_v1" "prometheus" {
    metadata {
       name        = "prometheus"
-      namespace = kubernetes_namespace.monitoring.metadata[0].name
+      namespace = data.kubernetes_namespace.monitoring.metadata[0].name
       annotations = {
         "nginx.ingress.kubernetes.io/rewrite-target" = "/"
       }
@@ -46,7 +46,7 @@ resource "kubernetes_ingress_v1" "prometheus" {
            path_type = "Prefix"
            backend {
              service {
-               name = "prometheus-community-kube-prometheus"
+               name = "kube-prometheus-stack-prometheus"
                port {
                  name = "http-web"
                }

terraform/modules/monitoring/loki.tf

@@ -2,7 +2,7 @@ resource "helm_release" "loki" {
   name             = "loki"
   repository       = "https://grafana.github.io/helm-charts"
   chart            = "loki-stack"
-  namespace        = kubernetes_namespace.monitoring.metadata[0].name
+  namespace        = data.kubernetes_namespace.monitoring.metadata[0].name
   create_namespace = false
   force_update     = true
   replace          = true

terraform/modules/monitoring/main.tf

@@ -1,4 +1,4 @@
-resource "kubernetes_namespace" "monitoring" {
+data "kubernetes_namespace" "monitoring" {
   metadata {
     name = "monitoring"
   }