cloudposse/terraform-aws-alb-ingress

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Terraform module to provision an HTTP style ALB ingress based on hostname and/or path.

ALB ingress can be provisioned without authentication, or using Cognito or OIDC authentication.

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provider "aws" {
  region = var.region
}

module "vpc" {
  source     = "cloudposse/vpc/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version     = "x.x.x"

  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 = "cloudposse/dynamic-subnets/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version     = "x.x.x"

  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 = "cloudposse/alb/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version     = "x.x.x"

  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
  access_logs_enabled                     = var.access_logs_enabled
  alb_access_logs_s3_bucket_force_destroy = var.alb_access_logs_s3_bucket_force_destroy
  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

  tags = var.tags
}

module "alb_ingress" {
  source = "cloudposse/alb-ingress/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version     = "x.x.x"

  namespace                           = var.namespace
  stage                               = var.stage
  name                                = var.name
  attributes                          = var.attributes
  delimiter                           = var.delimiter
  vpc_id                              = module.vpc.vpc_id
  authentication_type                 = var.authentication_type
  unauthenticated_priority            = var.unauthenticated_priority
  unauthenticated_paths               = var.unauthenticated_paths
  slow_start                          = var.slow_start
  stickiness_enabled                  = var.stickiness_enabled
  default_target_group_enabled        = false
  target_group_arn                    = module.alb.default_target_group_arn
  unauthenticated_listener_arns       = [module.alb.http_listener_arn]

  tags = var.tags
}

Important

In Cloud Posse's examples, we avoid pinning modules to specific versions to prevent discrepancies between the documentation and the latest released versions. However, for your own projects, we strongly advise pinning each module to the exact version you're using. This practice ensures the stability of your infrastructure. Additionally, we recommend implementing a systematic approach for updating versions to avoid unexpected changes.

NameVersion
terraform>= 1.0
aws>= 4.0
NameVersion
aws>= 4.0
NameSourceVersion
target_groupcloudposse/label/null0.25.0
thiscloudposse/label/null0.25.0
NameType
aws_lb_listener_rule.authenticated_hosts_cognitoresource
aws_lb_listener_rule.authenticated_hosts_oidcresource
aws_lb_listener_rule.authenticated_hosts_paths_cognitoresource
aws_lb_listener_rule.authenticated_hosts_paths_oidcresource
aws_lb_listener_rule.authenticated_paths_cognitoresource
aws_lb_listener_rule.authenticated_paths_oidcresource
aws_lb_listener_rule.unauthenticated_hostsresource
aws_lb_listener_rule.unauthenticated_hosts_pathsresource
aws_lb_listener_rule.unauthenticated_pathsresource
aws_lb_target_group.defaultresource
aws_lb_target_group.defaultdata source
NameDescriptionTypeDefaultRequired
additional_tag_mapAdditional key-value pairs to add to each map in tags_as_list_of_maps. Not added to tags or id.
This is for some rare cases where resources want additional configuration of tags
and therefore take a list of maps with tag key, value, and additional configuration.
map(string){}no
attributesID element. Additional attributes (e.g. workers or cluster) to add to id,
in the order they appear in the list. New attributes are appended to the
end of the list. The elements of the list are joined by the delimiter
and treated as a single ID element.
list(string)[]no
authenticated_hostsAuthenticated hosts to match in Hosts headerlist(string)[]no
authenticated_listener_arnsA list of authenticated ALB listener ARNs to attach ALB listener rules tolist(string)[]no
authenticated_pathsAuthenticated path pattern to match (a maximum of 1 can be defined)list(string)[]no
authenticated_priorityThe priority for the rules with authentication, between 1 and 50000 (1 being highest priority). Must be different from unauthenticated_priority since a listener can't have multiple rules with the same prioritynumbernullno
authentication_cognito_on_unauthenticated_requestCognito unauthenticated behavior, deny, allow, or authenticatestring"authenticate"no
authentication_cognito_request_extra_paramsCognito query parameters to include in redirect requestmap(string)nullno
authentication_cognito_scopeCognito scope, which should be a space separated string of requested scopes (see https://openid.net/specs/openid-connect-core-1_0.html#ScopeClaims)stringnullno
authentication_cognito_user_pool_arnCognito User Pool ARNstring""no
authentication_cognito_user_pool_client_idCognito User Pool Client IDstring""no
authentication_cognito_user_pool_domainCognito User Pool Domain. The User Pool Domain should be set to the domain prefix (xxx) instead of full domain (https://xxx.auth.us-west-2.amazoncognito.com)string""no
authentication_oidc_authorization_endpointOIDC Authorization Endpointstring""no
authentication_oidc_client_idOIDC Client IDstring""no
authentication_oidc_client_secretOIDC Client Secretstring""no
authentication_oidc_issuerOIDC Issuerstring""no
authentication_oidc_on_unauthenticated_requestOIDC unauthenticated behavior, deny, allow, or authenticatestring"authenticate"no
authentication_oidc_request_extra_paramsOIDC query parameters to include in redirect requestmap(string)nullno
authentication_oidc_scopeOIDC scope, which should be a space separated string of requested scopes (see https://openid.net/specs/openid-connect-core-1_0.html#ScopeClaims, and https://developers.google.com/identity/protocols/oauth2/openid-connect#scope-param for an example set of scopes when using Google as the IdP)stringnullno
authentication_oidc_token_endpointOIDC Token Endpointstring""no
authentication_oidc_user_info_endpointOIDC User Info Endpointstring""no
authentication_typeAuthentication type. Supported values are COGNITO and OIDCstring""no
contextSingle object for setting entire context at once.
See description of individual variables for details.
Leave string and numeric variables as null to use default value.
Individual variable settings (non-null) override settings in context object,
except for attributes, tags, and additional_tag_map, which are merged.
any
{
"additional_tag_map": {},
"attributes": [],
"delimiter": null,
"descriptor_formats": {},
"enabled": true,
"environment": null,
"id_length_limit": null,
"label_key_case": null,
"label_order": [],
"label_value_case": null,
"labels_as_tags": [
"unset"
],
"name": null,
"namespace": null,
"regex_replace_chars": null,
"stage": null,
"tags": {},
"tenant": null
}
no
default_target_group_enabledEnable/disable creation of the default target groupbooltrueno
delimiterDelimiter to be used between ID elements.
Defaults to - (hyphen). Set to "" to use no delimiter at all.
stringnullno
deregistration_delayThe amount of time to wait in seconds while deregistering targetnumber15no
descriptor_formatsDescribe additional descriptors to be output in the descriptors output map.
Map of maps. Keys are names of descriptors. Values are maps of the form
{<br/> format = string<br/> labels = list(string)<br/>}
(Type is any so the map values can later be enhanced to provide additional options.)
format is a Terraform format string to be passed to the format() function.
labels is a list of labels, in order, to pass to format() function.
Label values will be normalized before being passed to format() so they will be
identical to how they appear in id.
Default is {} (descriptors output will be empty).
any{}no
enabledSet to false to prevent the module from creating any resourcesboolnullno
environmentID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT'stringnullno
health_check_enabledIndicates whether health checks are enabled. Defaults to truebooltrueno
health_check_healthy_thresholdThe number of consecutive health checks successes required before healthynumber2no
health_check_intervalThe duration in seconds in between health checksnumber15no
health_check_matcherThe HTTP response codes to indicate a healthy checkstring"200-399"no
health_check_pathThe destination for the health check requeststring"/"no
health_check_portThe port to use to connect with the target. Valid values are either ports 1-65536, or traffic-port. Defaults to traffic-portstring"traffic-port"no
health_check_protocolThe protocol to use to connect with the target. Defaults to HTTP. Not applicable when target_type is lambdastring"HTTP"no
health_check_timeoutThe amount of time to wait in seconds before failing a health check requestnumber10no
health_check_unhealthy_thresholdThe number of consecutive health check failures required before unhealthynumber2no
id_length_limitLimit id to this many characters (minimum 6).
Set to 0 for unlimited length.
Set to null for keep the existing setting, which defaults to 0.
Does not affect id_full.
numbernullno
label_key_caseControls the letter case of the tags keys (label names) for tags generated by this module.
Does not affect keys of tags passed in via the tags input.
Possible values: lower, title, upper.
Default value: title.
stringnullno
label_orderThe order in which the labels (ID elements) appear in the id.
Defaults to ["namespace", "environment", "stage", "name", "attributes"].
You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present.
list(string)nullno
label_value_caseControls the letter case of ID elements (labels) as included in id,
set as tag values, and output by this module individually.
Does not affect values of tags passed in via the tags input.
Possible values: lower, title, upper and none (no transformation).
Set this to title and set delimiter to "" to yield Pascal Case IDs.
Default value: lower.
stringnullno
labels_as_tagsSet of labels (ID elements) to include as tags in the tags output.
Default is to include all labels.
Tags with empty values will not be included in the tags output.
Set to [] to suppress all generated tags.
Notes:
The value of the name tag, if included, will be the id, not the name.
Unlike other null-label inputs, the initial setting of labels_as_tags cannot be
changed in later chained modules. Attempts to change it will be silently ignored.
set(string)
[
"default"
]
no
listener_http_header_conditionsA list of http header conditions to apply to the listener.
list(object({
name = string
value = list(string)
}))
[]no
load_balancing_algorithm_typeDetermines how the load balancer selects targets when routing requests. Only applicable for Application Load Balancer Target Groups. The value is round_robin, least_outstanding_requests or weighted_random. The default is round_robin.string"round_robin"no
load_balancing_anomaly_mitigationDetermines whether to enable target anomaly mitigation. Only supported by the weighted_random load balancing algorithm type. Valid values are 'on' or 'off'.string"off"no
nameID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.
This is the only ID element not also included as a tag.
The "name" tag is set to the full id string. There is no tag with the value of the name input.
stringnullno
namespaceID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally uniquestringnullno
portThe port for the created ALB target group (if target_group_arn is not set)number80no
protocolThe protocol for the created ALB target group (if target_group_arn is not set)string"HTTP"no
protocol_versionOnly applicable when protocol is HTTP or HTTPS. The protocol version. Specify GRPC to send requests to targets using gRPC. Specify HTTP2 to send requests to targets using HTTP/2. The default is HTTP1, which sends requests to targets using HTTP/1.1string"HTTP1"no
regex_replace_charsTerraform regular expression (regex) string.
Characters matching the regex will be removed from the ID elements.
If not set, "/[^a-zA-Z0-9-]/" is used to remove all characters other than hyphens, letters and digits.
stringnullno
slow_startThe amount of time for targets to warm up before the load balancer sends them a full share of requests. The range is 30-900 seconds or 0 to disable. The default value is 0 secondsnumber0no
stageID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release'stringnullno
stickiness_cookie_durationThe time period, in seconds, during which requests from a client should be routed to the same target. After this time period expires, the load balancer-generated cookie is considered stale. The range is 1 second to 1 week (604800 seconds). The default value is 1 day (86400 seconds)number86400no
stickiness_cookie_nameName of the application based cookie. AWSALB, AWSALBAPP, and AWSALBTG prefixes are reserved and cannot be used. Only needed when stickiness_type is app_cookiestringnullno
stickiness_enabledBoolean to enable / disable stickiness. Default is truebooltrueno
stickiness_typeThe type of sticky sessions. The possible values are lb_cookie or app_cookiestring"lb_cookie"no
tagsAdditional tags (e.g. {'BusinessUnit': 'XYZ'}).
Neither the tag keys nor the tag values will be modified by this module.
map(string){}no
target_group_arnExisting ALB target group ARN. If provided, set default_target_group_enabled to false to disable creation of the default target groupstring""no
target_group_nameOverride the target group namestring""no
target_typeThe type (instance, ip or lambda) of targets that can be registered with the target groupstring"ip"no
tenantID element _(Rarely used, not included by default)_. A customer identifier, indicating who this instance of a resource is forstringnullno
unauthenticated_hostsUnauthenticated hosts to match in Hosts headerlist(string)[]no
unauthenticated_listener_arnsA list of unauthenticated ALB listener ARNs to attach ALB listener rules tolist(string)[]no
unauthenticated_pathsUnauthenticated path pattern to match (a maximum of 1 can be defined)list(string)[]no
unauthenticated_priorityThe priority for the rules without authentication, between 1 and 50000 (1 being highest priority). Must be different from authenticated_priority since a listener can't have multiple rules with the same prioritynumbernullno
vpc_idThe VPC ID where generated ALB target group will be provisioned (if target_group_arn is not set)stringn/ayes
NameDescription
target_group_arnALB Target Group ARN
target_group_arn_suffixALB Target Group ARN suffix
target_group_nameALB Target Group name

Check out these related projects.

  • 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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  1. Review our Code of Conduct and Contributor Guidelines.
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License

Preamble to the Apache License, Version 2.0

Complete license is available in the LICENSE file.

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

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied.  See the License for the
specific language governing permissions and limitations
under the License.

All other trademarks referenced herein are the property of their respective owners.


Copyright © 2017-2025 Cloud Posse, LLC

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Terraform module to provision an HTTP style ingress rule based on hostname and path for an ALB using target groups

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