Integrating On-Premises Active Directory with Google Cloud

B.

The scenario describes a requirement to integrate an on-premises Active Directory domain controller with Google Cloud resources. There are various ways to achieve this integration, and the most suitable solution would depend on specific needs and requirements.

Option A: Use the Admin Directory API to authenticate against the Active Directory domain controller. This option involves using the Admin Directory API to integrate with the on-premises Active Directory domain controller for user authentication. The Admin Directory API enables you to manage user accounts and organizational units in Google Workspace, as well as retrieve basic profile information for users. However, it does not provide a complete solution for integrating an on-premises Active Directory with Google Cloud. This option is not suitable for the scenario described.

Option B: Use Google Cloud Directory Sync to synchronize Active Directory usernames with cloud identities and configure SAML SSO. This option involves using Google Cloud Directory Sync (GCDS) to synchronize Active Directory usernames with cloud identities and configure SAML SSO (Single Sign-On) for user authentication. GCDS is a tool that synchronizes user accounts and group memberships between an Active Directory environment and Google Workspace. SAML SSO allows users to authenticate to Google Cloud services using their on-premises Active Directory credentials. This option is suitable for the scenario described and is a recommended approach for integrating an on-premises Active Directory with Google Cloud.

Option C: Use Cloud Identity-Aware Proxy configured to use the on-premises Active Directory domain controller as an identity provider. This option involves using Cloud Identity-Aware Proxy (IAP) to provide secure access to Google Cloud resources. IAP allows administrators to configure access policies based on user identity or group membership. This option is suitable for scenarios where a centralized identity provider, such as an on-premises Active Directory, is used for user authentication. However, it requires additional configuration to integrate with an on-premises Active Directory domain controller. This option is not the most suitable for the scenario described.

Option D: Use Compute Engine to create an Active Directory (AD) domain controller that is a replica of the on-premises AD domain controller using Google Cloud Directory Sync. This option involves using Compute Engine to create an Active Directory (AD) domain controller that is a replica of the on-premises AD domain controller using GCDS. This option is not recommended for the scenario described, as it requires additional infrastructure to be set up and maintained, which can be costly and complex. Additionally, this option does not provide any additional benefits over using GCDS to synchronize Active Directory usernames with cloud identities and configure SAML SSO.

In summary, the most suitable option for the scenario described is to use Google Cloud Directory Sync to synchronize Active Directory usernames with cloud identities and configure SAML SSO for user authentication.