This component is responsible for provisioning a generic Application Load Balancer. It depends on the vpc and dns-delegated components.

Usage

Stack Level: Regional

Here's an example snippet for how to use this component.

components:
  terraform:
    alb:
      vars:
        https_ssl_policy: ELBSecurityPolicy-FS-1-2-Res-2020-10
        health_check_path: /api/healthz

Requirements

Name	Version
terraform	>= 1.0.0
aws	>= 4.0
local	>= 2.1

Providers

No providers.

Modules

Name	Source	Version
acm	cloudposse/stack-config/yaml//modules/remote-state	1.5.0
alb	cloudposse/alb/aws	1.11.1
dns_delegated	cloudposse/stack-config/yaml//modules/remote-state	1.5.0
iam_roles	../account-map/modules/iam-roles	n/a
this	cloudposse/label/null	0.25.0
vpc	cloudposse/stack-config/yaml//modules/remote-state	1.5.0

Resources

No resources.

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_s3_bucket_id	An external S3 Bucket name to store access logs in. If specified, no logging bucket will be created.	string	null	no
acm_component_name	Atmos acm component name	string	"acm"	no
additional_tag_map	Additional 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
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	ID 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
context	Single 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
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 to be used between ID elements. Defaults to - (hyphen). Set to "" to use no delimiter at all.	string	null	no
deregistration_delay	The amount of time to wait in seconds before changing the state of a deregistering target to unused	number	15	no
descriptor_formats	Describe 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
dns_acm_enabled	If true, use the ACM ARN created by the given dns-delegated component. Otherwise, use the ACM ARN created by the given acm component.	bool	false	no
dns_delegated_component_name	Atmos dns-delegated component name	string	"dns-delegated"	no
dns_delegated_environment_name	dns-delegated component environment name	string	null	no
enabled	Set to false to prevent the module from creating any resources	bool	null	no
environment	ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT'	string	null	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_port	The port to use for the healthcheck	string	"traffic-port"	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	true	no
https_enabled	A boolean flag to enable/disable HTTPS listener	bool	true	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-TLS13-1-2-2021-06"	no
id_length_limit	Limit 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.	number	null	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
label_key_case	Controls 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.	string	null	no
label_order	The 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)	null	no
label_value_case	Controls 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.	string	null	no
labels_as_tags	Set 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
lifecycle_rule_enabled	A boolean that indicates whether the s3 log bucket lifecycle rule should be enabled.	bool	true	no
name	ID 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.	string	null	no
namespace	ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique	string	null	no
regex_replace_chars	Terraform 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.	string	null	no
region	AWS Region	string	n/a	yes
stage	ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release'	string	null	no
stickiness	Target group sticky configuration	object({ cookie_duration = number enabled = bool })	null	no
tags	Additional tags (e.g. {'BusinessUnit': 'XYZ'}). Neither the tag keys nor the tag values will be modified by this module.	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
tenant	ID element _(Rarely used, not included by default)_. A customer identifier, indicating who this instance of a resource is for	string	null	no
vpc_component_name	Atmos vpc component name	string	"vpc"	no

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

References

• cloudposse/terraform-aws-components - Cloud Posse's upstream component

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Note

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Learn More

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Related Projects

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• Cloud Posse Terraform Modules - Our collection of reusable Terraform modules used by our reference architectures.
• Atmos - Atmos is like docker-compose but for your infrastructure

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