Add workload autoscaler exporter (CME)

Author: zrudzionis

README.md

@@ -490,6 +490,8 @@ Usage examples are located in [terraform provider repo](https://github.com/casta
 | [helm_release.castai_spot_handler](https://registry.terraform.io/providers/hashicorp/helm/latest/docs/resources/release) | resource |
 | [helm_release.castai_workload_autoscaler](https://registry.terraform.io/providers/hashicorp/helm/latest/docs/resources/release) | resource |
 | [helm_release.castai_workload_autoscaler_self_managed](https://registry.terraform.io/providers/hashicorp/helm/latest/docs/resources/release) | resource |
+| [helm_release.castai_workload_autoscaler_exporter](https://registry.terraform.io/providers/hashicorp/helm/latest/docs/resources/release) | resource |
+| [helm_release.castai_workload_autoscaler_exporter_self_managed](https://registry.terraform.io/providers/hashicorp/helm/latest/docs/resources/release) | resource |
 | [null_resource.wait_for_cluster](https://registry.terraform.io/providers/hashicorp/null/latest/docs/resources/resource) | resource |
 | [azuread_client_config.current](https://registry.terraform.io/providers/hashicorp/azuread/latest/docs/data-sources/client_config) | data source |
 | [azurerm_kubernetes_cluster.aks](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/kubernetes_cluster) | data source |
@@ -531,6 +533,7 @@ Usage examples are located in [terraform provider repo](https://github.com/casta
 | <a name="input_install_pod_mutator"></a> [install\_pod\_mutator](#input\_install\_pod\_mutator) | Optional flag for installation of pod mutator | `bool` | `false` | no |
 | <a name="input_install_security_agent"></a> [install\_security\_agent](#input\_install\_security\_agent) | Optional flag for installation of security agent (Kvisor - https://docs.cast.ai/docs/kvisor) | `bool` | `false` | no |
 | <a name="input_install_workload_autoscaler"></a> [install\_workload\_autoscaler](#input\_install\_workload\_autoscaler) | Optional flag for installation of workload autoscaler (https://docs.cast.ai/docs/workload-autoscaling-configuration) | `bool` | `false` | no |
+| <a name="input_install_workload_autoscaler_exporter"></a> [install\_workload\_autoscaler\_exporter](#input\_install\_workload\_autoscaler\_exporter) | Optional flag for installation of workload autoscaler exporter (custom metrics exporter) | `bool` | `false` | no |
 | <a name="input_kvisor_controller_extra_args"></a> [kvisor\_controller\_extra\_args](#input\_kvisor\_controller\_extra\_args) | ⚠️ DEPRECATED: use kvisor\_values instead (see example: https://github.com/castai/terraform-provider-castai/tree/master/examples/aks/aks_cluster_with_security/castai.tf ). Extra arguments for the kvisor controller. Optionally enable kvisor to lint Kubernetes YAML manifests, scan workload images and check if workloads pass CIS Kubernetes Benchmarks as well as NSA, WASP and PCI recommendations. | `map(string)` | <pre>{<br/>  "image-scan-enabled": "true",<br/>  "kube-bench-enabled": "true",<br/>  "kube-linter-enabled": "true"<br/>}</pre> | no |
 | <a name="input_kvisor_grpc_addr"></a> [kvisor\_grpc\_addr](#input\_kvisor\_grpc\_addr) | CAST AI Kvisor optimized GRPC API address | `string` | `"kvisor.prod-master.cast.ai:443"` | no |
 | <a name="input_kvisor_values"></a> [kvisor\_values](#input\_kvisor\_values) | List of YAML formatted string values for kvisor helm chart, see example: https://github.com/castai/terraform-provider-castai/tree/master/examples/aks/aks_cluster_with_security/castai.tf | `list(string)` | `[]` | no |
@@ -554,6 +557,8 @@ Usage examples are located in [terraform provider repo](https://github.com/casta
 | <a name="input_wait_for_cluster_ready"></a> [wait\_for\_cluster\_ready](#input\_wait\_for\_cluster\_ready) | Wait for cluster to be ready before finishing the module execution, this option requires `castai_api_token` to be set | `bool` | `false` | no |
 | <a name="input_workload_autoscaler_values"></a> [workload\_autoscaler\_values](#input\_workload\_autoscaler\_values) | List of YAML formatted string with cluster-workload-autoscaler values | `list(string)` | `[]` | no |
 | <a name="input_workload_autoscaler_version"></a> [workload\_autoscaler\_version](#input\_workload\_autoscaler\_version) | Version of castai-workload-autoscaler helm chart. Default latest | `string` | `null` | no |
+| <a name="input_workload_autoscaler_exporter_values"></a> [workload\_autoscaler\_exporter\_values](#input\_workload\_autoscaler\_exporter\_values) | List of YAML formatted string with castai-workload-autoscaler-exporter values | `list(string)` | `[]` | no |
+| <a name="input_workload_autoscaler_exporter_version"></a> [workload\_autoscaler\_exporter\_version](#input\_workload\_autoscaler\_exporter\_version) | Version of castai-workload-autoscaler-exporter helm chart. Default latest | `string` | `null` | no |
 | <a name="input_workload_scaling_policies"></a> [workload\_scaling\_policies](#input\_workload\_scaling\_policies) | Map of workload scaling policies to create | `any` | `{}` | no |
 
 ## Outputs

main.tf

@@ -852,6 +852,75 @@ resource "helm_release" "castai_workload_autoscaler_self_managed" {
   depends_on = [helm_release.castai_agent, helm_release.castai_cluster_controller]
 }
 
+#----------------------------------------------------#
+# CAST.AI Workload Autoscaler Exporter configuration #
+#----------------------------------------------------#
+resource "helm_release" "castai_workload_autoscaler_exporter" {
+  count = var.install_workload_autoscaler_exporter && !var.self_managed ? 1 : 0
+
+  name             = "castai-workload-autoscaler-exporter"
+  repository       = "https://castai.github.io/helm-charts"
+  chart            = "castai-workload-autoscaler-exporter"
+  namespace        = "castai-agent"
+  create_namespace = true
+  cleanup_on_fail  = true
+  wait             = true
+
+  version = var.workload_autoscaler_exporter_version
+  values  = var.workload_autoscaler_exporter_values
+
+  set = concat(
+    [
+      {
+        name  = "castai.apiKeySecretRef"
+        value = "castai-cluster-controller"
+      },
+      {
+        name  = "castai.configMapRef"
+        value = "castai-cluster-controller"
+      },
+    ],
+    local.set_components_sets,
+  )
+
+  depends_on = [helm_release.castai_agent, helm_release.castai_cluster_controller]
+
+  lifecycle {
+    ignore_changes = [version]
+  }
+}
+
+resource "helm_release" "castai_workload_autoscaler_exporter_self_managed" {
+  count = var.install_workload_autoscaler_exporter && var.self_managed ? 1 : 0
+
+  name             = "castai-workload-autoscaler-exporter"
+  repository       = "https://castai.github.io/helm-charts"
+  chart            = "castai-workload-autoscaler-exporter"
+  namespace        = "castai-agent"
+  create_namespace = true
+  cleanup_on_fail  = true
+  wait             = true
+
+  version = var.workload_autoscaler_exporter_version
+  values  = var.workload_autoscaler_exporter_values
+
+  set = concat(
+    [
+      {
+        name  = "castai.apiKeySecretRef"
+        value = "castai-cluster-controller"
+      },
+      {
+        name  = "castai.configMapRef"
+        value = "castai-cluster-controller"
+      },
+    ],
+    local.set_components_sets,
+  )
+
+  depends_on = [helm_release.castai_agent, helm_release.castai_cluster_controller]
+}
+
 #---------------------------------------------------#
 # CAST.AI Pod Mutator configuration                 #
 #---------------------------------------------------#

variables.tf

@@ -263,6 +263,24 @@ variable "workload_autoscaler_values" {
   default     = []
 }
 
+variable "install_workload_autoscaler_exporter" {
+  type        = bool
+  default     = false
+  description = "Optional flag for installation of workload autoscaler exporter (custom metrics exporter)"
+}
+
+variable "workload_autoscaler_exporter_version" {
+  description = "Version of castai-workload-autoscaler-exporter helm chart. Default latest"
+  type        = string
+  default     = null
+}
+
+variable "workload_autoscaler_exporter_values" {
+  description = "List of YAML formatted string with castai-workload-autoscaler-exporter values"
+  type        = list(string)
+  default     = []
+}
+
 variable "azuread_owners" {
   description = "A set of object IDs of principals that will be granted ownership of the Azure AD service principal and application. Defaults to current user."
   type        = list(string)