Módulo de Terraform para Amazon Cognito User Pools

Les comparto otro módulo Terraform que acabo de publicar como código abierto, el cual permite crear Cognito User Pools con sus atributos, así como recursos tales como app clients, domain y resource server.

Puedes verificar el módulo terraform-aws-cognito-user-pool en el Terraform Registry o clonarlo de Github

Si quieres echar un vistazo al módulo, también dejé el archivo README en esta publicación:

terraform-aws-cognito-user-pool

Terraform module to create Amazon Cognito User Pools, configure its attributes and resources such as app clients, domain, resource servers. Amazon Cognito User Pools provide a secure user directory that scales to hundreds of millions of users. As a fully managed service, User Pools are easy to set up without any worries about standing up server infrastructure.

Usage

You can use this module to create a Cognito User Pool using the default values or use the detailed definition to set every aspect of the Cognito User Pool

Check the examples where you can see the simple example using the default values, the simple_extended version which adds  app clients, domain, resource servers resources, or the complete version with a detailed example.

Example (simple)

This simple example creates a AWS Cognito User Pool with the default values:

module "aws_cognito_user_pool_simple" {

  source = "../modules/terraform-aws-cognito-user-pool"

  user_pool_name = "mypool"

  tags = {
    Owner       = "infra"
    Environment = "production"
    Terraform   = true
  }

Example (complete)

This more complete example creates a AWS Cognito User Pool using a detailed configuration. Please check the example folder to get the example with all options:

module "aws_cognito_user_pool_complete" {

  source = "../modules/terraform-aws-cognito-user-pool"

  user_pool_name           = "mypool"
  alias_attributes         = ["email", "phone_number"]
  auto_verified_attributes = ["email"]

  admin_create_user_config = {
    unused_account_validity_days = 9
    email_subject                = "Here, your verification code baby"
  }

  email_configuration = {
    email_sending_account  = "DEVELOPER"
    reply_to_email_address = "email@example.com"
    source_arn             = "arn:aws:ses:us-east-1:888888888888:identity/example.com"
  }

  password_policy = {
    minimum_length    = 10
    require_lowercase = false
    require_numbers   = true
    require_symbols   = true
    require_uppercase = true
  }

  schemas = [
    {
      attribute_data_type      = "Boolean"
      developer_only_attribute = false
      mutable                  = true
      name                     = "available"
      required                 = false
    },
    {
      attribute_data_type      = "Boolean"
      developer_only_attribute = true
      mutable                  = true
      name                     = "registered"
      required                 = false
    }
  ]

  string_schemas = [
    {
      attribute_data_type      = "String"
      developer_only_attribute = false
      mutable                  = false
      name                     = "email"
      required                 = true

      string_attribute_constraints = {
        min_length = 7
        max_length = 15
      }
    }
  ]

  tags = {
    Owner       = "infra"
    Environment = "production"
    Terraform   = true
  }

Inputs

Name	Description	Type	Default	Required
admin_create_user_config	The configuration for AdminCreateUser requests	map	{}	no
admin_create_user_config_allow_admin_create_user_only	Set to True if only the administrator is allowed to create user profiles. Set to False if users can sign themselves up via an app	bool	true	no
admin_create_user_config_email_message	The message template for email messages. Must contain {username} and {####} placeholders, for username and temporary password, respectively	string	"{username}, your verification code is {####}"	no
admin_create_user_config_email_subject	The subject line for email messages	string	"Your verification code"	no
admin_create_user_config_sms_message	- The message template for SMS messages. Must contain {username} and {####} placeholders, for username and temporary password, respectively	string	"Your username is {username} and temporary password is {####}"	no
admin_create_user_config_unused_account_validity_days	The user account expiration limit, in days, after which the account is no longer usable	number	7	no
alias_attributes	Attributes supported as an alias for this user pool. Possible values: phone_number, email, or preferred_username. Conflicts with username_attributes	list	n/a	yes
auto_verified_attributes	The attributes to be auto-verified. Possible values: email, phone_number	list	[]	no
client_allowed_oauth_flows	The name of the application client	list	[]	no
client_allowed_oauth_flows_user_pool_client	Whether the client is allowed to follow the OAuth protocol when interacting with Cognito user pools	bool	true	no
client_allowed_oauth_scopes	List of allowed OAuth scopes (phone, email, openid, profile, and aws.cognito.signin.user.admin)	list	[]	no
client_callback_urls	List of allowed callback URLs for the identity providers	list	[]	no
client_default_redirect_uri	The default redirect URI. Must be in the list of callback URLs	string	""	no
client_explicit_auth_flows	List of authentication flows (ADMIN_NO_SRP_AUTH, CUSTOM_AUTH_FLOW_ONLY, USER_PASSWORD_AUTH)	list	[]	no
client_generate_secret	Should an application secret be generated	bool	true	no
client_logout_urls	List of allowed logout URLs for the identity providers	list	[]	no
client_name	The name of the application client	string	n/a	yes
client_read_attributes	List of user pool attributes the application client can read from	list	[]	no
client_refresh_token_validity	The time limit in days refresh tokens are valid for	number	30	no
client_supported_identity_providers	List of provider names for the identity providers that are supported on this client	list	[]	no
client_write_attributes	List of user pool attributes the application client can write to	list	[]	no
clients	A container with the clients definitions	list	[]	no
device_configuration	The configuration for the user pool’s device tracking	map	{}	no
device_configuration_challenge_required_on_new_device	Indicates whether a challenge is required on a new device. Only applicable to a new device	bool	false	no
device_configuration_device_only_remembered_on_user_prompt	If true, a device is only remembered on user prompt	bool	false	no
domain	Cognito User Pool domain	string	n/a	yes
domain_certificate_arn	The ARN of an ISSUED ACM certificate in us-east-1 for a custom domain	string	n/a	yes
email_configuration	The Email Configuration	map	{}	no
email_configuration_email_sending_account	Instruct Cognito to either use its built-in functional or Amazon SES to send out emails. Allowed values: COGNITO_DEFAULT or DEVELOPER	string	"COGNITO_DEFAULT"	no
email_configuration_reply_to_email_address	The REPLY-TO email address	string	""	no
email_configuration_source_arn	The ARN of the email source	string	""	no
email_verification_message	A string representing the email verification message	string	n/a	yes
email_verification_subject	A string representing the email verification subject	string	n/a	yes
lambda_config	A container for the AWS Lambda triggers associated with the user pool	map	n/a	yes
lambda_config_create_auth_challenge	The ARN of the lambda creating an authentication challenge.	string	""	no
lambda_config_custom_message	A custom Message AWS Lambda trigger.	string	""	no
lambda_config_define_auth_challenge	Defines the authentication challenge.	string	""	no
lambda_config_post_authentication	A post-authentication AWS Lambda trigger	string	""	no
lambda_config_post_confirmation	A post-confirmation AWS Lambda trigger	string	""	no
lambda_config_pre_authentication	A pre-authentication AWS Lambda trigger	string	""	no
lambda_config_pre_sign_up	A pre-registration AWS Lambda trigger	string	""	no
lambda_config_pre_token_generation	Allow to customize identity token claims before token generation	string	""	no
lambda_config_user_migration	The user migration Lambda config type	string	""	no
lambda_config_verify_auth_challenge_response	Verifies the authentication challenge response	string	""	no
mfa_configuration	Set to enable multi-factor authentication. Must be one of the following values (ON, OFF, OPTIONAL)	string	"OFF"	no
number_schemas	A container with the number schema attributes of a user pool. Maximum of 50 attributes	list	[]	no
password_policy	A container for information about the user pool password policy	hcl object({ minimum_length = number, require_lowercase = bool, require_lowercase = bool, require_numbers = bool, require_symbols = bool, require_uppercase = bool })	n/a	yes
password_policy_minimum_length	The minimum length of the password policy that you have set	number	8	no
password_policy_require_lowercase	Whether you have required users to use at least one lowercase letter in their password	bool	true	no
password_policy_require_numbers	Whether you have required users to use at least one number in their password	bool	true	no
password_policy_require_symbols	Whether you have required users to use at least one symbol in their password	bool	true	no
password_policy_require_uppercase	Whether you have required users to use at least one uppercase letter in their password	bool	true	no
resource_server_identifier	An identifier for the resource server	string	n/a	yes
resource_server_name	A name for the resource server	string	n/a	yes
resource_server_scope_description	The scope description	string	n/a	yes
resource_server_scope_name	The scope name	string	n/a	yes
resource_servers	A container with the user_groups definitions	list	[]	no
schemas	A container with the schema attributes of a user pool. Maximum of 50 attributes	list	[]	no
sms_authentication_message	A string representing the SMS authentication message	string	n/a	yes
sms_configuration	The SMS Configuration	map	{}	no
sms_configuration_external_id	The external ID used in IAM role trust relationships	string	""	no
sms_configuration_sns_caller_arn	The ARN of the Amazon SNS caller. This is usually the IAM role that you’ve given Cognito permission to assume	string	""	no
sms_verification_message	A string representing the SMS verification message	string	n/a	yes
string_schemas	A container with the string schema attributes of a user pool. Maximum of 50 attributes	list	[]	no
tags	A mapping of tags to assign to the User Pool	map(string)	{}	no
user_group_description	The description of the user group	string	n/a	yes
user_group_name	The name of the user group	string	n/a	yes
user_group_precedence	The precedence of the user group	number	n/a	yes
user_group_role_arn	The ARN of the IAM role to be associated with the user group	string	n/a	yes
user_groups	A container with the user_groups definitions	list	[]	no
user_pool_add_ons	Configuration block for user pool add-ons to enable user pool advanced security mode features	map	{}	no
user_pool_add_ons_advanced_security_mode	The mode for advanced security, must be one of OFF, AUDIT or ENFORCED	string	n/a	yes
user_pool_name	The name of the user pool	string	n/a	yes
username_attributes	Specifies whether email addresses or phone numbers can be specified as usernames when a user signs up. Conflicts with alias_attributes	list	n/a	yes
verification_message_template	The verification message templates configuration	map	{}	no
verification_message_template_default_email_option	The default email option. Must be either CONFIRM_WITH_CODE or CONFIRM_WITH_LINK. Defaults to CONFIRM_WITH_CODE	string	n/a	yes
verification_message_template_email_message_by_link	The email message template for sending a confirmation link to the user, it must contain the {##Click Here##} placeholder	string	n/a	yes
verification_message_template_email_subject_by_link	The subject line for the email message template for sending a confirmation link to the user	string	n/a	yes

Outputs

Name	Description
arn	The ARN of the user pool
client_ids	The ids of the user pool clients
client_secrets	The client secrets of the user pool clients
creation_date	The date the user pool was created
domain_app_version	The app version
domain_aws_account_id	The AWS account ID for the user pool owner
domain_cloudfront_distribution_arn	The ARN of the CloudFront distribution
domain_s3_bucket	The S3 bucket where the static files for this domain are stored
endpoint	The endpoint name of the user pool. Example format: cognito-idp.REGION.amazonaws.com/xxxx_yyyyy
id	The id of the user pool
last_modified_date	The date the user pool was last modified
resource_servers_scope_identifiers	A list of all scopes configured in the format identifier/scope_name

Know issue

Removing all lambda triggers

If you define lambda triggers using the lambda_config block or any lambda_config_* variable and you want to remove all triggers, define the lambda_config block with an empty map {} and apply the plan. Then comment the lambda_config block or define it as null and apply the plan again.

This is needed because all paramters for the lambda_config block are optional and keeping all block attributes empty or null forces to create a lambda_config {} block very time a plan/apply is run.

References

• terraform-aws-cognito-user-pool module at Github
• terraform-aws-cognito-user-pool module at Terraform Registry