feat: add keda

Author: jindraj

main.tf

@@ -50,6 +50,20 @@ module "karpenter" {
   node_role_arn              = var.karpenter.node_role_arn
 }
 
+module "keda" {
+  count  = var.keda.enabled ? 1 : 0
+  source = "./modules/keda"
+
+  namespace       = var.keda.namespace
+  repository      = var.keda.repository
+  replicas        = var.keda.replicas
+  log_level       = var.keda.log_level
+  metrics_server  = var.keda.metrics_server
+  node_selector   = var.keda.node_selector
+  tolerations     = var.keda.tolerations
+  pod_annotations = var.keda.pod_annotations
+}
+
 module "external_secrets" {
   count = var.external_secrets.enabled ? 1 : 0
 

modules/keda/main.tf

@@ -0,0 +1,19 @@
+resource "helm_release" "keda" {
+  name       = "keda"
+  repository = var.repository
+  chart      = "keda"
+  namespace  = var.namespace
+  version    = "2.16.1"
+
+  values = [
+    yamlencode({
+      replicas       = var.replicas
+      logLevel       = var.log_level
+      metricsServer  = { enabled = var.metrics_server }
+      nodeSelector   = var.node_selector
+      tolerations    = var.tolerations
+      podAnnotations = var.pod_annotations
+    })
+  ]
+}
+

modules/keda/outputs.tf

@@ -0,0 +1,52 @@
+variable "namespace" {
+  description = "Namespace where Keda will be deployed"
+  type        = string
+  default     = "cluster-apps"
+}
+
+variable "repository" {
+  description = "Helm repository URL for Keda"
+  type        = string
+  default     = "https://kedacore.github.io/charts"
+}
+
+variable "replicas" {
+  description = "Number of replicas for Keda operator"
+  type        = number
+  default     = 2
+}
+
+variable "log_level" {
+  description = "Logging level for Keda operator"
+  type        = string
+  default     = "info"
+}
+
+variable "metrics_server" {
+  description = "Enable Keda's Prometheus metrics adapter"
+  type        = bool
+  default     = true
+}
+
+variable "node_selector" {
+  description = "Node selector for Keda pods"
+  type        = map(string)
+  default     = {}
+}
+
+variable "tolerations" {
+  description = "Tolerations for Keda pods"
+  type = list(object({
+    key      = string
+    operator = string
+    value    = optional(string, null)
+    effect   = optional(string, null)
+  }))
+  default = []
+}
+
+variable "pod_annotations" {
+  description = "Annotations for Keda pods"
+  type        = map(string)
+  default     = {}
+}

modules/keda/variables.tf

@@ -0,0 +1,14 @@
+terraform {
+  required_version = ">= 1.9, < 2.0"
+
+  required_providers {
+    kubernetes = {
+      source  = "hashicorp/kubernetes"
+      version = "~> 2.30"
+    }
+    helm = {
+      source  = "hashicorp/helm"
+      version = "~> 2.14"
+    }
+  }
+}

modules/keda/versions.tf

@@ -83,6 +83,27 @@ variable "karpenter" {
   default = {}
 }
 
+variable "keda" {
+  description = "Keda configuration"
+  type = object({
+    enabled        = optional(bool, false)
+    repository     = optional(string, "https://kedacore.github.io/charts")
+    namespace      = optional(string, "cluster-apps")
+    replicas       = optional(number, 2)
+    log_level      = optional(string, "info")
+    metrics_server = optional(bool, true)
+    node_selector  = optional(map(string), {})
+    tolerations = optional(list(object({
+      key      = string
+      operator = string
+      value    = optional(string, null)
+      effect   = optional(string, null)
+    })), [])
+    pod_annotations = optional(map(string), {})
+  })
+  default = {}
+}
+
 variable "external_secrets" {
   description = "external secrets configuration"
   type = object({