account_alternate_contacts

Account Alternate Contacts

Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. SPDX-License-Identifier: CC-BY-SA-4.0

Table of Contents

• Table of Contents
• Introduction
• Deployed Resource Details
• Implementation Instructions
• References

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Introduction

The Account Alternate Contacts solution sets alternate contacts for all existing and future AWS Organization accounts.

Key solution features:

• Sets different alternate contacts for:
  • Billing: The alternate billing contact will receive billing-related notifications, such as invoice availability notifications.
  • Operations: The alternate operations contact will receive operations-related notifications.
  • Security: The alternate security contact will receive security-related notifications, including notifications from the AWS Abuse Team.
• Assumes a role in the management and member accounts to set the alternate contacts.
• Sets alternate contacts for all existing accounts including the management account and future accounts.
• Ability to delete alternate contacts via a parameter and CloudFormation update event.

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Deployed Resource Details

1.0 Organization Management Account

1.1 AWS CloudFormation

• All resources are deployed via AWS CloudFormation as a StackSet and Stack Instance within the management account or a CloudFormation Stack within a specific account.
• The Customizations for AWS Control Tower solution deploys all templates as a CloudFormation StackSet.
• For parameter details, review the AWS CloudFormation templates.

1.2 IAM Roles

• The Lambda IAM Role is used by the Lambda function to identify existing and future accounts that need Account Alternate Contacts configured.
• The Configuration IAM Role is assumed by the Lambda function to set alternate contacts for the management account and the member accounts.
• The Event Rule IAM Role is assumed by EventBridge to forward Global events to the Home Region default Event Bus.

1.3 Regional Event Rules

• The AWS Control Tower Lifecycle Event Rule triggers the AWS Lambda Function when a new AWS Account is provisioned through AWS Control Tower.
• The Organization Compliance Scheduled Event Rule triggers the AWS Lambda Function to capture AWS Account status updates (e.g. suspended to active).
  • A parameter is provided to set the schedule frequency.
  • See the Instructions to Manually Run the Lambda Function for triggering the AWS Lambda Function before the next scheduled run time.
• The AWS Organizations Event Rule triggers the AWS Lambda Function when updates are made to accounts within the organization.
  • When AWS Accounts are added to the AWS Organization outside of the AWS Control Tower Account Factory. (e.g. account created via AWS Organizations console, account invited from another AWS Organization).
  • When tags are added or updated on AWS Accounts.

1.4 Global Event Rules

• If the Home Region is different from the Global Region (e.g. us-east-1), then global event rules are created within the Global Region to forward events to the Home Region default Event Bus.
• The AWS Organizations Event Rule forwards AWS Organization account update events.

1.5 Dead Letter Queue (DLQ)

• SQS dead letter queue used for retaining any failed Lambda events.

1.6 AWS Lambda Function

• The Lambda function includes logic to set Account Alternate Contacts.

1.7 Lambda CloudWatch Log Group

• All the AWS Lambda Function logs are sent to a CloudWatch Log Group </aws/lambda/<LambdaFunctionName> to help with debugging and traceability of the actions performed.
• By default the AWS Lambda Function will create the CloudWatch Log Group and logs are encrypted with a CloudWatch Logs service managed encryption key.
• Parameters are provided for changing the default log group retention and encryption KMS key.

1.8 Alarm SNS Topic

• SNS Topic used to notify subscribers when messages hit the Dead Letter Queue (DLQ).

1.9 SNS Topic

• SNS Topic used to fanout the Lambda function for setting the Account Alternate Contact

1.10 Account Alternate Contacts

• Account Alternate Contacts (Billing, Operations, Security) are configured for all accounts.
• Account Alternate Contacts can be updated as necessary via CloudFormation parameters.
• Deleting the CloudFormation stack, will not remove the existing Account Alternate Contacts. (see Solution Delete Instructions for details on deleting alternate contacts)
• Note: If a value is provided to the Exclude Alternate Contact Account Tags optional CloudFormation parameter, AWS accounts matching those tags will be excluded from account alternate contacts being applied.

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2.0 All Existing and Future Organization Member Accounts

2.1 AWS CloudFormation

• See 1.1 AWS CloudFormation

2.2 Configuration IAM Role

• See 1.2 IAM Role

2.3 Account Alternate Contacts

• Account Alternate Contacts (Billing, Operations, Security) are configured for all accounts.
• Account Alternate Contacts can be updated as necessary via CloudFormation parameters.
• Deleting the CloudFormation stack, will not remove the existing Account Alternate Contacts. (see Solution Delete Instructions for details on deleting alternate contacts)
• Note: If a value is provided to the Exclude Alternate Contact Account Tags optional CloudFormation parameter, AWS accounts matching those tags will be excluded from account alternate contacts being applied.

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Implementation Instructions

Prerequisites

1. Download and Stage the SRA Solutions. Note: This only needs to be done once for all the solutions.
2. Verify that the SRA Prerequisites Solution has been deployed.

Solution Deployment

Choose a Deployment Method:

• AWS CloudFormation
• Customizations for AWS Control Tower

AWS CloudFormation

In the management account (home region), launch the sra-account-alternate-contacts-main-ssm.yaml template. This uses an approach where some of the CloudFormation parameters are populated from SSM parameters created by the SRA Prerequisites Solution.

aws cloudformation deploy --template-file $HOME/aws-sra-examples/aws_sra_examples/solutions/account/account_alternate_contacts/templates/sra-account-alternate-contacts-main-ssm.yaml --stack-name sra-account-alternate-contacts-main-ssm --capabilities CAPABILITY_NAMED_IAM --parameter-overrides pBillingContactAction=add pBillingName=<BILLING_NAME> pBillingTitle=<BILLING_TITLE> pBillingEmail=<BILLING_EMAIL> pBillingPhone=<BILLING_PHONE> pOperationsContactAction=add pOperationsName=<OPERATIONS_NAME> pOperationsTitle=<OPERATIONS_TITLE> pOperationsEmail=<OPERATIONS_EMAIL> pOperationsPhone=<OPERATIONS_PHONE> pSecurityContactAction=add pSecurityName=<SECURITY_NAME> pSecurityTitle=<SECURITY_TITLE> pSecurityEmail=<SECURITY_EMAIL> pSecurityPhone=<SECURITY_PHONE> pSRAAlarmEmail=<SRA_ALARM_EMAIL> pExcludeAlternateContactAccountTags='<EXCLUDE_ALTERNATE_CONTACT_ACCOUNT_TAGS>'

Verify Solution Deployment

1. Log into the management account and navigate to the Account page
   1. Verify that the Alternate Contacts are set correctly.
2. Log into a member account and verify the Alternate Contacts are set correctly.

Solution Delete Instructions

Note: Deleting the solution will not delete the existing Account Alternate Contacts. If needed, update the CloudFormation stack to provide new alternate contacts.

1. (Optional) In the management account (home region), to delete the alternate contacts, change the Billing Alternate Contact Action, Operations Alternate Contact Action, and Security Alternate Contact Action parameters to delete and update the AWS CloudFormation Stack (sra-account-alternate-contacts-main-ssm or sra-account-alternate-contacts-main).
2. In the management account (home region), delete the AWS CloudFormation Stack (sra-account-alternate-contacts-main-ssm or sra-account-alternate-contacts-main).
3. In the management account (home region), delete the AWS CloudWatch Log Group (e.g. /aws/lambda/<solution_name>) for the Lambda function deployed.

Instructions to Manually Run the Lambda Function

1. In the management account (home region).
2. Navigate to the AWS Lambda Functions page.
3. Select the checkbox next to the Lambda Function and select Test from the Actions menu.
4. Scroll down to view the Test event.
5. Click the Test button to trigger the Lambda Function with the default values.
6. Verify that the updates were successful within the expected account(s).

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References

• Update the primary and alternate contact information
• Adding, changing, or removing alternate contacts