Terraform module configure IAM in a new Amazon account_setup

⚠️ 👉🏻 These instruction are outdated, certain features might have been removed or added.

This terraform modules configures the following in IAM:

• Creates a policy to enforce MFA;
• Sets a script password policy;
• Creates a group with admin privileges, with MFA enable_admin_group;
• Creates a group with read-only policy (disabled by default);
• Creates a global cloud trail (disabled by default);
• Creates a user including access keys for monitoring purposes (disabled by default).

All features can be enabled or disabled, default is enabled.

The following AWS Config rules can be enabled (AWS Config is disabled by default, each rule can be enabled individually):

• Require a specific tag on the resources¹;
• Require root account MFA enabled;
• Cloud trail enabled;
• IAM password policy compliance.

In addition this module is able to create the necessary resources to enable CloudWatch cross-account observability (oam), this feature is disabled by default. Make sure you have an AWS account configured as monitoring account before enabling. More details can be found here.

¹Terraform does not allow passing unset value similar to !Ref "AWS::NoValue". Due to this limitation only a single tag tag1Key can be passed as a parameter to to this module. If you require additional key-value pairs in your AWS config REQUIRED_TAGS rule, the module must be extended manually.

Usage

Example usages

⚠️ 👉🏻 This is an example, it might be that certain settings are not 'best-practise'.

module "account_setup" {
  source = "git@github.com:dovetailworld/terraform-aws-account-setup.git?ref=<version>"

  # iam
  enable_account_password_policy = false
  enable_read_only_group         = false
  enable_admin_group             = false

  # cloudtrail
  enable_cloudtrail = true
  cloudtrail_bucket = ""
  kms_key_id        = ""
  trail_name        = local.account-name

  # cloudwatch
  enable_cloudwatch_logs = true

  # oam
  # Note: Do not enable this on the monitoring account itself!
  enable_oam         = true
  sink_identifier    = ""
  monitoring_account = ""

  # config
  enable_aws_config                    = false
  enable_rule_require_tag              = false
  enable_rule_require_root_account_MFA = false
  enable_rule_iam_password_policy      = false
  enable_rule_require_cloud_trail      = false

  # ssm session manager
  enable_ssm_session_manager = true
  s3_bucket_name             = ""
  s3_key_prefix              = "${local.account-id}-${local.account-name}"
}

Requirements

Name	Version
terraform	>= 0.13.0
aws	~> 5.0
null	~> 3.0

Providers

Name	Version
aws	~> 5.0
null	~> 3.0

Modules

No modules.

Resources

Name	Type
aws_cloudtrail.cloudtrail	resource
aws_cloudwatch_log_group.log_group	resource
aws_config_config_rule.cloud_trail_enabled_rule	resource
aws_config_config_rule.iam_password_policy_rule	resource
aws_config_config_rule.require_root_account_MFA_enabled_rule	resource
aws_config_config_rule.require_tag_rule	resource
aws_config_configuration_recorder.aws_config_recorder	resource
aws_config_configuration_recorder_status.aws_config_recorder_status	resource
aws_config_delivery_channel.aws_config_delivery_channel	resource
aws_dynamodb_table.kabisa_terraform_lockfiles_dynamodb_table	resource
aws_ebs_encryption_by_default.this	resource
aws_iam_access_key.monitor_readonly_user_access_key	resource
aws_iam_account_password_policy.pasword_policy	resource
aws_iam_group.admin	resource
aws_iam_group.read-only-group	resource
aws_iam_group_policy_attachment.admin	resource
aws_iam_group_policy_attachment.mfa	resource
aws_iam_group_policy_attachment.read-only-policy-attachment	resource
aws_iam_policy.cloudwatch_iam_policy	resource
aws_iam_policy.mfa	resource
aws_iam_policy.monitor_readonly_user_policy	resource
aws_iam_role.aws_config_iam_role	resource
aws_iam_role.cloudwatch_iam_role	resource
aws_iam_role.cw_cas_role	resource
aws_iam_role_policy.aws_config_iam_policy	resource
aws_iam_role_policy_attachment.aws_config_iam_policy_attachment	resource
aws_iam_role_policy_attachment.cloudwatch_iam_policy_attachment	resource
aws_iam_role_policy_attachment.cw-dashboard-attach	resource
aws_iam_role_policy_attachment.cw-readonly-attach	resource
aws_iam_role_policy_attachment.xray-readonly-attach	resource
aws_iam_user.monitor_readonly_user	resource
aws_kms_key.cloudtrail_bucket_key	resource
aws_oam_link.this	resource
aws_s3_bucket.aws_config_configuration_bucket	resource
aws_s3_bucket.cloudtrail_bucket	resource
aws_s3_bucket.kabisa_terraform_statefiles_bucket	resource
aws_s3_bucket_acl.s3_bucket_private_acl	resource
aws_s3_bucket_ownership_controls.s3_bucket_acl_ownership	resource
aws_s3_bucket_policy.cloudtrail_bucket	resource
aws_s3_bucket_server_side_encryption_configuration.cloudtrail_bucket	resource
aws_s3_bucket_server_side_encryption_configuration.s3_bucket_encrypt_rule	resource
aws_s3_bucket_versioning.versioning_bucket	resource
aws_sns_topic.aws_config_updates_topic	resource
aws_ssm_document.session_manager_prefs	resource
null_resource.sns_subscribe	resource
aws_caller_identity.current	data source
aws_iam_policy_document.aws_config	data source
aws_iam_policy_document.aws_config_assume	data source
aws_iam_policy_document.cloudtrail_bucket	data source
aws_iam_policy_document.cloudwatch	data source
aws_iam_policy_document.cloudwatch_assume	data source
aws_iam_policy_document.force_mfa	data source
aws_iam_policy_document.monitor_readonly_user_policy_document	data source

Inputs

Name	Description	Type	Default	Required
admin_group_name	Name of the admin group.	string	"admins"	no
allow_users_to_change_password	Whether to allow users to change their own password	bool	true	no
aws_config_notification_emails	A list of email addresses for that will receive AWS Config changes notifications	list(string)	[]	no
cloudtrail_bucket	The name of the cloudtrail bucket	string	n/a	yes
cloudwatch_encryption_enabled	Encrypt log data.	bool	false	no
cloudwatch_iam_policy_name	The name of the policy which is used for the cloudtrail cloudwatch role	string	"terraform-cloudwatch-policy"	no
cloudwatch_iam_role_name	The name of the role which of the cloudtrail cloudwatch role	string	"terraform-cloudwatch-role"	no
cloudwatch_log_group_name	The name of the cloudwatch log name	string	"CloudTrail/DefaultLogGroup"	no
dynamodb_tables_creation	Whether to create dynamodb tables for terraform state file	bool	false	no
dynamodb_tables_name	The dynamodb tables name	string	""	no
enable_account_password_policy	Enable custom (strict) password policy.	bool	true	no
enable_admin_group	Create an admin group.	bool	true	no
enable_aws_config	Specifies if the AWS Config should be enabled	bool	false	no
enable_cloudtrail	Create a default cloudtrail for the account.	bool	false	no
enable_cloudwatch_logs	Enable Cloudwatch Logs for Cloudtrail.	bool	false	no
enable_log_file_validation	Specifies whether log file integrity validation is enabled.	bool	true	no
enable_mfa	Enable to force MFA usages.	bool	true	no
enable_monitor_readonly_user	Create a user that can read monitor metrics (e.g. for grafana)	bool	false	no
enable_oam	Whether to create resources used for oam	bool	false	no
enable_read_only_group	Creates a group with read-only IAM policy assigned to it.	bool	false	no
enable_rule_iam_password_policy	Specifies if 'IAM password policy' rule should be enabled	bool	false	no
enable_rule_require_cloud_trail	Specifies if 'Cloud Trail enabled' rule should be enabled	bool	false	no
enable_rule_require_root_account_MFA	Specifies if 'Require root account MFA enabled' rule should be enabled	bool	false	no
enable_rule_require_tag	Specifies if 'Require Tag' rule should be enabled	bool	false	no
enable_ssm_session_manager	Specifies if the ssm session manager should be enabled	bool	false	no
event_selector	Specifies an event selector for enabling data event logging, It needs to be a list of map values. See: https://www.terraform.io/docs/providers/aws/r/cloudtrail.html for details on this map variable	list(string)	[]	no
hard_expiry	Whether users are prevented from setting a new password after their password has expired (i.e. require administrator reset)	bool	false	no
include_global_service_events	Specifies whether the trail is publishing events from global services such as IAM to the log files.	bool	true	no
is_multi_region_trail	Specifies whether the trail is created in the current region or in all regions.	bool	true	no
kms_key_id	The arn of the CMK key which is used for encrypting cloudtrail logs	string	n/a	yes
max_password_age	The number of days that an user password is valid.	number	33	no
minimum_password_length	Minimum length to require for user passwords.	number	32	no
monitor_readonly_user_name	The user name for the monitor read only user	string	"monitor_readonly"	no
monitoring_account	AWS monitoring account ID	string	n/a	yes
password_reuse_prevention	The number of previous passwords that users are prevented from reusing.	number	1	no
read_only_group_name	Name for read-only group.	string	"read-only"	no
require_lowercase_characters	Whether to require lowercase characters for user passwords.	bool	true	no
require_numbers	Whether to require numbers for user passwords.	bool	true	no
require_symbols	Whether to require symbols for user passwords.	bool	true	no
require_uppercase_characters	Whether to require uppercase characters for user passwords.	bool	true	no
s3_bucket_name	(Optional) The name of bucket to store session logs. Specifying this enables writing session output to an Amazon S3 bucket.	string	""	no
s3_bucket_state_file_creation	Whether to create S3 bucket in the AWS Account to store terraform state file	bool	false	no
s3_bucket_state_file_name	The S3 bucket name which store the terraform state file	string	""	no
s3_encryption_enabled	Encrypt log data.	bool	false	no
s3_key_prefix	(Optional) To write output to a sub-folder, enter a sub-folder name.	string	""	no
sink_identifier	Sink ID	string	n/a	yes
tag1Key	Specifies value of the Key for Tag1	string	""	no
tags	Map of tags to apply on the resources	map(string)	{}	no
trail_name	Name of the cloud trail. Required if the cloudtrail is enabled.	string	n/a	yes

Outputs

Name	Description
cloudwatch_log_group_arn	Cloud trail arn.
mfa_policy_arn	MFA Policy arn.
monitor_readonly_user_access_key_id	Access key id for the monitor readonly user
monitor_readonly_user_arn	ARN for the monitor readonly user
monitor_readonly_user_secret_access_key	Secret access key for the monitor readonly user
trail_arn	Cloud trail arn.