feat: postgres disk (#62)

* feat: postgres disk

* chore: format

Author: lorenzocorallo

main.tf

@@ -10,9 +10,10 @@ data "http" "myip" {
 }
 
 locals {
-  my_ip               = "${chomp(data.http.myip.response_body)}/32"
-  elia-ip             = "185.178.95.235/32"
-  mariadb_internal_ip = "mariadb-service.mariadb.svc.cluster.local"
+  my_ip                = "${chomp(data.http.myip.response_body)}/32"
+  elia-ip              = "185.178.95.235/32"
+  mariadb_internal_ip  = "mariadb-service.mariadb.svc.cluster.local"
+  postgres_internal_ip = "postgres-service.postgres.svc.cluster.local"
 }
 
 module "aks" {
@@ -200,3 +201,15 @@ module "mariadb" {
   rg_name  = azurerm_resource_group.rg.name
 }
 
+module "postgres" {
+  depends_on = [
+    module.aks,
+    module.argo-cd
+  ]
+
+  source               = "./modules/postgres/"
+  postgres_internal_ip = local.postgres_internal_ip
+
+  location = azurerm_resource_group.rg.location
+  rg_name  = azurerm_resource_group.rg.name
+}

modules/postgres/.terraform.lock.hcl

@@ -0,0 +1,55 @@
+resource "kubernetes_namespace" "postgres" {
+  metadata {
+    name = "postgres"
+  }
+}
+
+resource "azurerm_managed_disk" "storage" {
+  name                 = "md-polinetwork-postgres"
+  location             = var.location
+  resource_group_name  = var.rg_name
+  storage_account_type = "Premium_LRS"
+  create_option        = "Empty"
+  disk_size_gb         = "32"
+  tier                 = "P4"
+}
+
+resource "kubernetes_persistent_volume" "storageaks" {
+  metadata {
+    name = "postgres-persistent-volume"
+  }
+  spec {
+    capacity = {
+      storage = "32Gi"
+    }
+    storage_class_name = "managed-csi"
+    access_modes       = ["ReadWriteOnce"]
+    persistent_volume_source {
+      csi {
+        driver        = "disk.csi.azure.com"
+        volume_handle = azurerm_managed_disk.storage.id
+      }
+    }
+  }
+
+  depends_on = [
+    azurerm_managed_disk.storage
+  ]
+}
+
+resource "kubernetes_persistent_volume_claim" "postgres_storage" {
+  metadata {
+    name      = "postgres-pvc"
+    namespace = "postgres"
+  }
+  spec {
+    access_modes       = ["ReadWriteOnce"]
+    storage_class_name = "managed-csi"
+    resources {
+      requests = {
+        storage = "32Gi"
+      }
+    }
+    volume_name = kubernetes_persistent_volume.storageaks.metadata[0].name
+  }
+}

modules/postgres/postgres.tf

@@ -0,0 +1,13 @@
+terraform {
+  required_version = "~> 1.0"
+  required_providers {
+    kubernetes = {
+      source  = "hashicorp/kubernetes"
+      version = "2.21.1"
+    }
+    azurerm = {
+      source  = "hashicorp/azurerm"
+      version = "=4.23.0"
+    }
+  }
+}

modules/postgres/providers.tf

@@ -0,0 +1,14 @@
+variable "postgres_internal_ip" {
+  type     = string
+  nullable = false
+}
+
+variable "location" {
+  type     = string
+  nullable = false
+}
+
+variable "rg_name" {
+  type     = string
+  nullable = false
+}