From 55d47201798c06d2d9967046790f4606cdaa85ea Mon Sep 17 00:00:00 2001
From: Paulo Machado <paulo.machado@canonical.com>
Date: Tue, 15 Oct 2024 09:34:08 -0300
Subject: [PATCH] tf module on charm (#643)

---
 terraform/main.tf      | 19 +++++++++++++++
 terraform/outputs.tf   | 18 +++++++++++++++
 terraform/variables.tf | 52 ++++++++++++++++++++++++++++++++++++++++++
 terraform/versions.tf  |  9 ++++++++
 4 files changed, 98 insertions(+)
 create mode 100644 terraform/main.tf
 create mode 100644 terraform/outputs.tf
 create mode 100644 terraform/variables.tf
 create mode 100644 terraform/versions.tf

diff --git a/terraform/main.tf b/terraform/main.tf
new file mode 100644
index 0000000000..e55420a960
--- /dev/null
+++ b/terraform/main.tf
@@ -0,0 +1,19 @@
+resource "juju_application" "machine_postgresql" {
+  name  = var.app_name
+  model = var.juju_model_name
+
+  charm {
+    name     = "postgresql"
+    channel  = var.channel
+    revision = var.revision
+    base     = var.base
+  }
+
+  storage_directives = {
+    pgdata = var.storage_size
+  }
+
+  units       = var.units
+  constraints = var.constraints
+  config      = var.config
+}
diff --git a/terraform/outputs.tf b/terraform/outputs.tf
new file mode 100644
index 0000000000..52f1981f24
--- /dev/null
+++ b/terraform/outputs.tf
@@ -0,0 +1,18 @@
+output "application_name" {
+  value = juju_application.machine_postgresql.name
+}
+
+
+output "provides" {
+  value = {
+    database  = "database",
+    cos_agent = "cos-agent",
+  }
+}
+
+output "requires" {
+  value = {
+    certificates  = "certificates"
+    s3_parameters = "s3-parameters"
+  }
+}
diff --git a/terraform/variables.tf b/terraform/variables.tf
new file mode 100644
index 0000000000..ede475f37a
--- /dev/null
+++ b/terraform/variables.tf
@@ -0,0 +1,52 @@
+variable "juju_model_name" {
+  description = "Juju model name"
+  type        = string
+}
+
+variable "app_name" {
+  description = "Name of the application in the Juju model."
+  type        = string
+  default     = "postgresql"
+}
+
+variable "channel" {
+  description = "Charm channel to use when deploying"
+  type        = string
+  default     = "14/stable"
+}
+
+variable "revision" {
+  description = "Revision number to deploy charm"
+  type        = number
+  default     = null
+}
+
+variable "base" {
+  description = "Application base"
+  type        = string
+  default     = "ubuntu@22.04"
+}
+
+variable "units" {
+  description = "Number of units to deploy"
+  type        = number
+  default     = 1
+}
+
+variable "constraints" {
+  description = "Juju constraints to apply for this application."
+  type        = string
+  default     = "arch=amd64"
+}
+
+variable "storage_size" {
+  description = "Storage size"
+  type        = string
+  default     = "10G"
+}
+
+variable "config" {
+  description = "Application configuration. Details at https://charmhub.io/postgresql/configurations"
+  type        = map(string)
+  default     = {}
+}
diff --git a/terraform/versions.tf b/terraform/versions.tf
new file mode 100644
index 0000000000..3586261576
--- /dev/null
+++ b/terraform/versions.tf
@@ -0,0 +1,9 @@
+terraform {
+  required_version = ">= 1.6.6"
+  required_providers {
+    juju = {
+      source  = "juju/juju"
+      version = ">= 0.14.0"
+    }
+  }
+}