### Default Firewall Rule Example

Source: https://github.com/azure/terraform-azurerm-avm-res-dbforpostgresql-flexibleserver/blob/main/README.md

An example of a default firewall rule configuration that allows all IP addresses.

```json
{
  "rule1": {
    "end_ip_address": "255.255.255.255",
    "name": "AllowAllFireWallRule",
    "start_ip_address": "0.0.0.0"
  }
}
```

--------------------------------

### Configure Firewall Rules for PostgreSQL Flexible Server

Source: https://github.com/azure/terraform-azurerm-avm-res-dbforpostgresql-flexibleserver/blob/main/README.md

Define a map of firewall rules for the PostgreSQL Flexible Server. Each rule requires a name and start/end IP addresses to specify the allowed network access.

```hcl
map(object({
    name             = string
    end_ip_address   = string
    start_ip_address = string
  }))
```

--------------------------------

### Configure Diagnostic Settings for PostgreSQL Flexible Server

Source: https://github.com/azure/terraform-azurerm-avm-res-dbforpostgresql-flexibleserver/blob/main/README.md

Define a map of diagnostic settings to be created on the PostgreSQL Flexible Server. This includes specifying log and metric categories, destination types, and resource IDs for storage or event hubs.

```hcl
map(object({
    name                                     = optional(string, null)
    log_categories                           = optional(set(string), [])
    log_groups                               = optional(set(string), ["allLogs"])
    metric_categories                        = optional(set(string), ["AllMetrics"])
    log_analytics_destination_type           = optional(string, "Dedicated")
    workspace_resource_id                    = optional(string, null)
    storage_account_resource_id              = optional(string, null)
    event_hub_authorization_rule_resource_id = optional(string, null)
    event_hub_name                           = optional(string, null)
    marketplace_partner_resource_id          = optional(string, null)
  }))
```

--------------------------------

### Terraform Configuration for PostgreSQL Flexible Server

Source: https://github.com/azure/terraform-azurerm-avm-res-dbforpostgresql-flexibleserver/blob/main/examples/default/README.md

This is the main Terraform configuration file. It defines required providers, a resource group, and calls the PostgreSQL Flexible Server module with various settings including high availability and SKU.

```hcl
terraform {
  required_version = ">= 1.9, < 2.0"

  required_providers {
    azurerm = {
      source  = "hashicorp/azurerm"
      version = "~> 4.12"
    }
    random = {
      source  = "hashicorp/random"
      version = "~> 3.6"
    }
  }
}

provider "azurerm" {
  features {}
}


## Section to provide a random Azure region for the resource group
# This allows us to randomize the region for the resource group.
module "regions" {
  source  = "Azure/regions/azurerm"
  version = "0.8.2"
}

# This allows us to randomize the region for the resource group.
resource "random_integer" "region_index" {
  max = length(module.regions.regions) - 1
  min = 0
}
## End of section to provide a random Azure region for the resource group

# This ensures we have unique CAF compliant names for our resources.
module "naming" {
  source  = "Azure/naming/azurerm"
  version = "0.4.2"
}

# This is required for resource modules
resource "azurerm_resource_group" "this" {
  location = "australiaeast" #module.regions.regions[random_integer.region_index.result].name
  name     = module.naming.resource_group.name_unique
}

resource "random_password" "myadminpassword" {
  length           = 16
  override_special = "_%@"
  special          = true
}

# This is the module call
# Do not specify location here due to the randomization above.
# Leaving location as `null` will cause the module to use the resource group location
# with a data source.
module "test" {
  source = "../../"

  location                     = azurerm_resource_group.this.location
  name                         = module.naming.postgresql_server.name_unique
  resource_group_name          = azurerm_resource_group.this.name
  administrator_login          = "psqladmin"
  administrator_password       = random_password.myadminpassword.result
  enable_telemetry             = var.enable_telemetry
  geo_redundant_backup_enabled = true
  high_availability = {
    mode                      = "ZoneRedundant"
    standby_availability_zone = 2
  }
  server_version = 16
  sku_name       = "GP_Standard_D2s_v3"
  tags           = null
  zone           = 1
}

```

--------------------------------

### Default High Availability Configuration

Source: https://github.com/azure/terraform-azurerm-avm-res-dbforpostgresql-flexibleserver/blob/main/README.md

The default high availability configuration for the PostgreSQL Flexible Server, set to 'ZoneRedundant' mode.

```json
{
  "mode": "ZoneRedundant"
}
```

--------------------------------

### Terraform Configuration for PostgreSQL Deployment

Source: https://github.com/azure/terraform-azurerm-avm-res-dbforpostgresql-flexibleserver/blob/main/examples/database/README.md

This HCL code configures Terraform, providers, and modules to deploy an Azure Database for PostgreSQL flexible server and a database. It includes random resource generation for region and password, and naming conventions for resource uniqueness.

```hcl
terraform {
  required_version = ">= 1.9, < 2.0"

  required_providers {
    azurerm = {
      source  = "hashicorp/azurerm"
      version = "~> 4.12"
    }
    random = {
      source  = "hashicorp/random"
      version = "~> 3.6"
    }
  }
}

provider "azurerm" {
  features {}
}


## Section to provide a random Azure region for the resource group
# This allows us to randomize the region for the resource group.
module "regions" {
  source  = "Azure/regions/azurerm"
  version = "0.8.2"
}

# This allows us to randomize the region for the resource group.
resource "random_integer" "region_index" {
  max = length(module.regions.regions) - 1
  min = 0
}
## End of section to provide a random Azure region for the resource group

# This ensures we have unique CAF compliant names for our resources.
module "naming" {
  source  = "Azure/naming/azurerm"
  version = "0.4.2"
}

# This is required for resource modules
resource "azurerm_resource_group" "this" {
  location = "australiaeast" # module.regions.regions[random_integer.region_index.result].name
  name     = module.naming.resource_group.name_unique
}

resource "random_password" "myadminpassword" {
  length           = 16
  override_special = "_%@"
  special          = true
}

# This is the module call
# Do not specify location here due to the randomization above.
# Leaving location as `null` will cause the module to use the resource group location
# with a data source.
module "server" {
  source = "../../"

  location                     = azurerm_resource_group.this.location
  name                         = module.naming.postgresql_server.name_unique
  resource_group_name          = azurerm_resource_group.this.name
  administrator_login          = "psqladmin"
  administrator_password       = random_password.myadminpassword.result
  enable_telemetry             = var.enable_telemetry
  geo_redundant_backup_enabled = true
  high_availability = {
    mode                      = "ZoneRedundant"
    standby_availability_zone = 2
  }
  server_version = 16
  sku_name       = "GP_Standard_D2s_v3"
  tags           = null
  zone           = 1
}

module "database" {
  source = "../../modules/database"

  name      = module.naming.postgresql_database.name_unique
  server_id = module.server.resource_id
  charset   = "UTF8"
  collation = "en_US.utf8"
}

```

--------------------------------

### Configure High Availability for PostgreSQL Flexible Server

Source: https://github.com/azure/terraform-azurerm-avm-res-dbforpostgresql-flexibleserver/blob/main/README.md

Define the high availability configuration for the PostgreSQL Flexible Server, specifying the mode (e.g., ZoneRedundant) and optionally the standby availability zone.

```hcl
object({
    mode                      = string
    standby_availability_zone = optional(string)
  })
```

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