Merge pull request #9 from FriedCircuits/feature/Generic-Helm-Chart-M…

…odule

Generic Helm Chart Module

README.md

@@ -5,6 +5,7 @@ Hodgepodge of Terraform modules.
    * VM Clone (Create VMs from Templates (created by packer))
 
 * K8S
-    * Get Join (Get join config from Kuberenetes control plane)
-    * K8s-At-Home (Deploy a chart from the k8s-at-home helm repo)
-    * Traefik Ingress (Creats Ingress CRDs for host based routing)
+    * Get Join        - Get join config from Kuberenetes control plane
+    * K8s-At-Home     - Deploy a chart from the k8s-at-home helm repo
+    * Traefik Ingress - Creats Ingress CRDs for host based routing
+    * Helm Chart      - Deploy any helm chart

modules/k8s/helm-chart/main.tf

@@ -0,0 +1,42 @@
+resource "kubernetes_namespace" "namespace" {
+  count = var.create_namespace ? 1 : 0
+  metadata {
+    name = var.namespace
+  }
+}
+
+locals {
+  values = yamlencode(
+    merge(var.persistence != {} ? tomap({
+      persistence = merge({
+         enabled = true
+       },
+       var.persistence)
+      }) : {}, var.ingress != {} ? tomap({
+      ingress = merge({
+         enabled = true
+       }, tomap({
+       annotations = var.ingress_annotations}),
+       var.ingress)
+      }) : {},
+      var.helm_envs,
+      var.helm_values
+    )
+  )
+}
+
+resource "helm_release" "k8s" {
+  repository = var.helm_repo
+  name       = var.name
+  chart      = var.chart
+  version    = var.chart_version
+  namespace  = var.namespace
+
+  values = [
+    local.values,
+  ]
+
+  depends_on = [
+    kubernetes_namespace.namespace,
+  ]
+}

modules/k8s/helm-chart/variables.tf

@@ -0,0 +1,63 @@
+variable "chart_version" {
+  description = "The version of the helm chart to use. Note that this is different from the app/container version."
+  type        = string
+}
+
+variable "create_namespace" {
+  description = "Create namespace or deploy to existing."
+  type        = bool
+  default     = true
+}
+
+variable "namespace" {
+  description = "Which Kubernetes Namespace to deploy the chart into."
+  type        = string
+  default     = "default"
+}
+
+variable "helm_repo" {
+  description = "Helm chart repo URL."
+  type        = string
+}
+
+variable "name" {
+  description = "Name of chart deployment."
+  type        = string
+}
+
+variable "chart" {
+  description = "Name of helm chart."
+  type        = string
+}
+
+variable "persistence" {
+  description = "Configure persistence volume on this deployment."
+  type        = any
+  default     = {}
+# Example
+}
+
+variable "ingress" {
+  description = "Configure ingress on this deployment."
+  type        = any
+  default     = {}
+# Example
+}
+
+variable "ingress_annotations" {
+  description = "Configure ingress annotations on this deployment."
+  type        = map(string)
+  default     = {}
+}
+
+variable "helm_envs" {
+  description = "Map of envs for helm chart. Merged with timezone."
+  type        = any
+  default     = {}
+}
+
+variable "helm_values" {
+  description = "Additional helm values to pass in as a map. Timezone will be included already."
+  type        = any
+  default     = {}
+}

modules/k8s/helm-chart/versions.tf

@@ -0,0 +1,18 @@
+terraform {
+  required_version = ">= 1.0"
+
+  required_providers {
+    kubernetes = {
+      source  = "hashicorp/kubernetes"
+      version = "~> 1.0"
+    }
+     helm = {
+      source  = "hashicorp/helm"
+      version = "~> 2.0"
+    }
+    aws = {
+      source  = "hashicorp/aws"
+      version = "~> 3.0"
+    }
+  }
+}