terraform-aws-alb

Terraform module to create an ALB, default ALB listener(s), and a default ALB target and related security groups.

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Usage

IMPORTANT: The master branch is used in source just as an example. In your code, do not pin to master because there may be breaking changes between releases. Instead pin to the release tag (e.g. ?ref=tags/x.y.z) of one of our latest releases.

For a complete example, see examples/complete.

For automated test of the complete example using bats and Terratest, see test.

  provider "aws" {
    region = var.region
  }

  module "vpc" {
    source     = "git::https://github.com/cloudposse/terraform-aws-vpc.git?ref=tags/0.8.1"
    namespace  = var.namespace
    stage      = var.stage
    name       = var.name
    delimiter  = var.delimiter
    attributes = var.attributes
    cidr_block = var.vpc_cidr_block
    tags       = var.tags
  }

  module "subnets" {
    source               = "git::https://github.com/cloudposse/terraform-aws-dynamic-subnets.git?ref=tags/0.16.1"
    availability_zones   = var.availability_zones
    namespace            = var.namespace
    stage                = var.stage
    name                 = var.name
    attributes           = var.attributes
    delimiter            = var.delimiter
    vpc_id               = module.vpc.vpc_id
    igw_id               = module.vpc.igw_id
    cidr_block           = module.vpc.vpc_cidr_block
    nat_gateway_enabled  = false
    nat_instance_enabled = false
    tags                 = var.tags
  }

  module "alb" {
    source                                  = "git::https://github.com/cloudposse/terraform-aws-alb.git?ref=master"
    namespace                               = var.namespace
    stage                                   = var.stage
    name                                    = var.name
    attributes                              = var.attributes
    delimiter                               = var.delimiter
    vpc_id                                  = module.vpc.vpc_id
    security_group_ids                      = [module.vpc.vpc_default_security_group_id]
    subnet_ids                              = module.subnets.public_subnet_ids
    internal                                = var.internal
    http_enabled                            = var.http_enabled
    http_redirect                           = var.http_redirect
    access_logs_enabled                     = var.access_logs_enabled
    alb_access_logs_s3_bucket_force_destroy = var.alb_access_logs_s3_bucket_force_destroy
    access_logs_region                      = var.access_logs_region
    cross_zone_load_balancing_enabled       = var.cross_zone_load_balancing_enabled
    http2_enabled                           = var.http2_enabled
    idle_timeout                            = var.idle_timeout
    ip_address_type                         = var.ip_address_type
    deletion_protection_enabled             = var.deletion_protection_enabled
    deregistration_delay                    = var.deregistration_delay
    health_check_path                       = var.health_check_path
    health_check_timeout                    = var.health_check_timeout
    health_check_healthy_threshold          = var.health_check_healthy_threshold
    health_check_unhealthy_threshold        = var.health_check_unhealthy_threshold
    health_check_interval                   = var.health_check_interval
    health_check_matcher                    = var.health_check_matcher
    target_group_port                       = var.target_group_port
    target_group_target_type                = var.target_group_target_type
    stickiness                              = var.stickiness
    tags                                    = var.tags
  }

Makefile Targets

Available targets:

  help                                Help screen
  help/all                            Display help for all targets
  help/short                          This help short screen
  lint                                Lint terraform code

Requirements

Name	Version
terraform	>= 0.12.0
aws	>= 2.0
local	>= 1.3
null	>= 2.0
template	>= 2.0

Providers

Name	Version
aws	>= 2.0

Inputs

Name	Description	Type	Default	Required
access_logs_enabled	A boolean flag to enable/disable access_logs	`bool`	`true`	no
access_logs_prefix	The S3 log bucket prefix	`string`	`""`	no
access_logs_region	The region for the access_logs S3 bucket	`string`	`"us-east-1"`	no
alb_access_logs_s3_bucket_force_destroy	A boolean that indicates all objects should be deleted from the ALB access logs S3 bucket so that the bucket can be destroyed without error	`bool`	`false`	no
attributes	Additional attributes (_e.g._ "1")	`list(string)`	`[]`	no
certificate_arn	The ARN of the default SSL certificate for HTTPS listener	`string`	`""`	no
cross_zone_load_balancing_enabled	A boolean flag to enable/disable cross zone load balancing	`bool`	`true`	no
deletion_protection_enabled	A boolean flag to enable/disable deletion protection for ALB	`bool`	`false`	no
delimiter	Delimiter between `namespace`, `stage`, `name` and `attributes`	`string`	`"-"`	no
deregistration_delay	The amount of time to wait in seconds before changing the state of a deregistering target to unused	`number`	`15`	no
enable_glacier_transition	Enables the transition of lb logs to AWS Glacier	`bool`	`true`	no
environment	Environment, e.g. 'prod', 'staging', 'dev', 'pre-prod', 'UAT'	`string`	`""`	no
expiration_days	Number of days after which to expunge s3 logs	`number`	`90`	no
glacier_transition_days	Number of days after which to move s3 logs to the glacier storage tier	`number`	`60`	no
health_check_healthy_threshold	The number of consecutive health checks successes required before considering an unhealthy target healthy	`number`	`2`	no
health_check_interval	The duration in seconds in between health checks	`number`	`15`	no
health_check_matcher	The HTTP response codes to indicate a healthy check	`string`	`"200-399"`	no
health_check_path	The destination for the health check request	`string`	`"/"`	no
health_check_timeout	The amount of time to wait in seconds before failing a health check request	`number`	`10`	no
health_check_unhealthy_threshold	The number of consecutive health check failures required before considering the target unhealthy	`number`	`2`	no
http2_enabled	A boolean flag to enable/disable HTTP/2	`bool`	`true`	no
http_enabled	A boolean flag to enable/disable HTTP listener	`bool`	`true`	no
http_ingress_cidr_blocks	List of CIDR blocks to allow in HTTP security group	`list(string)`	[ "0.0.0.0/0" ]	no
http_ingress_prefix_list_ids	List of prefix list IDs for allowing access to HTTP ingress security group	`list(string)`	`[]`	no
http_port	The port for the HTTP listener	`number`	`80`	no
http_redirect	A boolean flag to enable/disable HTTP redirect to HTTPS	`bool`	`false`	no
https_enabled	A boolean flag to enable/disable HTTPS listener	`bool`	`false`	no
https_ingress_cidr_blocks	List of CIDR blocks to allow in HTTPS security group	`list(string)`	[ "0.0.0.0/0" ]	no
https_ingress_prefix_list_ids	List of prefix list IDs for allowing access to HTTPS ingress security group	`list(string)`	`[]`	no
https_port	The port for the HTTPS listener	`number`	`443`	no
https_ssl_policy	The name of the SSL Policy for the listener	`string`	`"ELBSecurityPolicy-2015-05"`	no
idle_timeout	The time in seconds that the connection is allowed to be idle	`number`	`60`	no
internal	A boolean flag to determine whether the ALB should be internal	`bool`	`false`	no
ip_address_type	The type of IP addresses used by the subnets for your load balancer. The possible values are `ipv4` and `dualstack`.	`string`	`"ipv4"`	no
lifecycle_rule_enabled	A boolean that indicates whether the s3 log bucket lifecycle rule should be enabled.	`bool`	`false`	no
name	Name of the application	`string`	n/a	yes
namespace	Namespace (e.g. `eg` or `cp`)	`string`	`""`	no
noncurrent_version_expiration_days	Specifies when noncurrent s3 log versions expire	`number`	`90`	no
noncurrent_version_transition_days	Specifies when noncurrent s3 log versions transition	`number`	`30`	no
security_group_ids	A list of additional security group IDs to allow access to ALB	`list(string)`	`[]`	no
stage	Stage (e.g. `prod`, `dev`, `staging`)	`string`	`""`	no
standard_transition_days	Number of days to persist logs in standard storage tier before moving to the infrequent access tier	`number`	`30`	no
stickiness	Target group sticky configuration	object({ cookie_duration = number enabled = bool })	`null`	no
subnet_ids	A list of subnet IDs to associate with ALB	`list(string)`	n/a	yes
tags	Additional tags (_e.g._ { BusinessUnit : ABC })	`map(string)`	`{}`	no
target_group_additional_tags	The additional tags to apply to the target group	`map(string)`	`{}`	no
target_group_name	The name for the default target group, uses a module label name if left empty	`string`	`""`	no
target_group_port	The port for the default target group	`number`	`80`	no
target_group_protocol	The protocol for the default target group HTTP or HTTPS	`string`	`"HTTP"`	no
target_group_target_type	The type (`instance`, `ip` or `lambda`) of targets that can be registered with the target group	`string`	`"ip"`	no
vpc_id	VPC ID to associate with ALB	`string`	n/a	yes

Outputs

Name	Description
access_logs_bucket_id	The S3 bucket ID for access logs
alb_arn	The ARN of the ALB
alb_arn_suffix	The ARN suffix of the ALB
alb_dns_name	DNS name of ALB
alb_name	The ARN suffix of the ALB
alb_zone_id	The ID of the zone which ALB is provisioned
default_target_group_arn	The default target group ARN
http_listener_arn	The ARN of the HTTP forwarding listener
http_redirect_listener_arn	The ARN of the HTTP to HTTPS redirect listener
https_listener_arn	The ARN of the HTTPS listener
listener_arns	A list of all the listener ARNs
security_group_id	The security group ID of the ALB

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Related Projects

Check out these related projects.

terraform-aws-alb-ingress - Terraform module to provision an HTTP style ingress rule based on hostname and path for an ALB

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Copyright

License

See LICENSE for full details.

Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

  https://www.apache.org/licenses/LICENSE-2.0

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