alb | Patterned Designs Documentation

Overview

The alb module creates AWS Application Load Balancers with production-ready defaults including:

Target groups with configurable health checks
HTTP and HTTPS listeners with SSL/TLS termination
ACM certificate integration
Access logging to S3
Multi-AZ deployment for high availability

Category: Networking Provider: AWS Latest Version: 3.0.0

Quick Start

module "web_alb" {
  source  = "registry.patterneddesigns.ca/patterneddesigns/alb/aws"
  version = "3.0.0"

  name    = "web-alb"
  vpc_id  = module.vpc.vpc_id
  subnets = module.vpc.public_subnets
}

Key Features

Multi-AZ Deployment

Deploy across multiple availability zones for high availability:

module "ha_alb" {
  source  = "registry.patterneddesigns.ca/patterneddesigns/alb/aws"
  version = "3.0.0"

  name    = "ha-alb"
  vpc_id  = module.vpc.vpc_id
  subnets = module.vpc.public_subnets  # Subnets in different AZs
}

SSL/TLS Termination

Terminate SSL at the load balancer with ACM certificates:

module "secure_alb" {
  source  = "registry.patterneddesigns.ca/patterneddesigns/alb/aws"
  version = "3.0.0"

  name    = "secure-alb"
  vpc_id  = module.vpc.vpc_id
  subnets = module.vpc.public_subnets

  https_listeners = [{
    port            = 443
    certificate_arn = aws_acm_certificate.main.arn
  }]
}

Internal Load Balancer

Deploy private load balancers for internal services:

module "internal_alb" {
  source  = "registry.patterneddesigns.ca/patterneddesigns/alb/aws"
  version = "3.0.0"

  name     = "internal-alb"
  vpc_id   = module.vpc.vpc_id
  subnets  = module.vpc.private_subnets
  internal = true
}

Documentation

Inputs - All input parameters
Outputs - Output values
Examples - Usage examples
Use Cases - Common use cases
Demonstrations - Step-by-step guides

Registry

View specification on Registry

Inputs

name Required

string

Name of the ALB. Must be unique within your account and region. Maximum 32 characters.

vpc_id Required

string

VPC ID for the ALB. The ALB must be created in the same VPC as your target resources.

subnets Required

list(string)

List of subnet IDs for the ALB. Requires at least 2 subnets in different AZs.

internal

bool

Whether the ALB is internal. Set to true for internal ALBs (microservices, internal APIs) or false for internet-facing ALBs (public APIs, websites).