Azure Load Balancer Terraform Module

This Terraform module creates and manages Azure Load Balancers and their associated resources.

Features

• Create multiple Azure Load Balancers
• Configure frontend IP configurations
• Create backend address pools
• Set up NAT pools and rules
• Configure outbound rules
• Define load balancer rules

Usage

module "load_balancer" {
  source = "github.com/your-org/terraform-azurerm-lb"

  lbs = [
    {
      name     = "example-lb"
      rg_name  = "example-rg"
      location = "uksouth"
      tags     = { Environment = "Production" }
      sku      = "Standard"
      sku_tier = "Regional"

      frontend_ip_configuration = [
        {
          name                          = "frontend-ip"
          zones                         = [1, 2, 3]
          public_ip_address_id          = azurerm_public_ip.example.id
          private_ip_address_allocation = "Dynamic"
        }
      ]

      backend_address_pools = [
        {
          name = "backend-pool"
        }
      ]

      lb_rules = [
        {
          name          = "http"
          protocol      = "Tcp"
          frontend_port = 80
          backend_port  = 80
        }
      ]
    }
  ]
}

Requirements

No requirements.

Providers

Name	Version
azurerm	n/a

Modules

No modules.

Resources

Name	Type
azurerm_lb.this	resource
azurerm_lb_backend_address_pool.this	resource
azurerm_lb_nat_pool.this	resource
azurerm_lb_nat_rule.this	resource
azurerm_lb_outbound_rule.this	resource
azurerm_lb_rule.this	resource

Inputs

Name	Description	Type	Default	Required
lbs	A list of LBs to make	list(object({ name = string rg_name = string location = optional(string, "uksouth") tags = map(string) edge_zone = optional(string) frontend_ip_configuration = optional(list(object({ name = optional(string) zones = list(number) subnet_id = optional(string) gateway_load_balancer_frontend_ip_configuration_id = optional(string) private_ip_address = optional(string) private_ip_address_allocation = optional(string, "Dynamic") private_ip_address_version = optional(string, "IPv4") public_ip_address_id = optional(string) public_ip_prefix_id = optional(string) }))) sku = optional(string, "Standard") sku_tier = optional(string, "Regional") backend_address_pools = optional(list(object({ name = optional(string) virtual_network_id = optional(string) loadbalancer_id = optional(string) synchronous_mode = optional(string) tunnel_interface = optional(list(object({ identifier = string type = optional(string) protocol = optional(string) port = number }))) }))) nat_pools = optional(list(object({ name = optional(string) protocol = string frontend_port_start = number frontend_port_end = number backend_port = number frontend_ip_configuration_name = optional(string) idle_timeout_in_minutes = optional(number) floating_ip_enabled = optional(bool) tcp_reset_enabled = optional(bool) }))) nat_rules = optional(list(object({ name = optional(string) protocol = optional(string, "Tcp") frontend_port = optional(number) frontend_port_start = optional(number) frontend_port_end = optional(number) backend_port = number frontend_ip_configuration_name = optional(string) backend_address_pool_id = optional(string) idle_timeout_in_minutes = optional(number) enable_tcp_reset = optional(bool) enable_floating_ip = optional(bool) }))) outbound_rules = optional(list(object({ name = optional(string) protocol = string backend_address_pool_id = optional(string) associate_backend_pool_key = optional(string) frontend_ip_configuration = optional(list(object({ name = string }))) enable_tcp_reset = optional(bool) allocated_outbound_ports = optional(number, 1024) idle_timeout_in_minutes = optional(number, 4) }))) lb_rules = optional(list(object({ name = optional(string) protocol = string frontend_port = number backend_port = number associate_backend_pool_key = optional(string) backend_address_pool_ids = optional(list(string)) probe_id = optional(string) frontend_ip_configuration_name = optional(string) enable_floating_ip = optional(bool) idle_timeout_in_minutes = optional(number) load_distribution = optional(string) disable_outbound_snat = optional(bool) enable_tcp_reset = optional(bool) }))) }))	n/a	yes

Outputs

Name	Description
lb_backend_address_pool_backend_ip_configurations	Map of _ → list of Backend IP Configuration IDs.
lb_backend_address_pool_inbound_nat_rules	Map of _ → list of Inbound NAT Rule IDs.
lb_backend_address_pool_load_balancing_rules	Map of _ → list of Load-Balancing Rule IDs.
lb_backend_address_pool_outbound_rules	Map of _ → list of Outbound Rule IDs.
lb_frontend_ip_configuration	Flattened view of every frontend_ip_configuration on every Load Balancer, including all attributes exported by the provider.
lb_id	Load Balancer resource IDs.
lb_name	Load Balancer names.
lb_nat_rule_ids	Map of _ → NAT-rule ID.
lb_nat_rule_names	Map of _ → NAT-rule name.
lb_private_ip_address	First private IP address on each Load Balancer (first frontend config only).
lb_private_ip_addresses	List of all private IPs (across all frontend configs) on each Load Balancer.
lb_rule_ids	Map of _ → azurerm_lb_rule ID.
lb_rule_names	Map of _ → azurerm_lb_rule name.