Keycloak for Multi-Product Authentication with API-Driven Automation and White-Label Support

Configuring the server
1

Description:

I’m working on a project that involves multiple independent products and clients, and I’m planning to use Keycloak as the Identity Provider (IdP) for authentication and user management. My setup involves distinct use cases, nested organizational structures, and a requirement to manage everything via Keycloak’s REST APIs without using the Admin Console. Here’s a detailed breakdown of my requirements and questions:

Requirements

  1. Multiple Independent Products:
  • Each product (e.g., hrms, leanclouds,`) is deployed in separate environments.
  • Each product needs to use Keycloak for authentication and authorization.
  • Each product can have multiple clients, sub-clients, and users with different roles.
  1. White-Label Support:
  • Some clients will use the products as white-labeled solutions with their own branding and user management.
  • Clients may have their own sub-clients and nested user hierarchies.
  1. API-Driven Automation:
  • I want to automate everything using Keycloak REST APIs:
    • Realm Creation to represent organizations/products.
    • Client Creation for different parts of a product (e.g., API, main site, white-label).
    • User Management: Create, update, and delete users programmatically.
    • Group Management: Create and manage groups and sub-groups dynamically.
    • Role Assignment: Assign roles to users dynamically during user creation.
    • CORS Configuration and client-specific settings via APIs.
  1. Custom UI:
  • I will build a custom UI for:
    • User login, registration, and profile management.
    • Admin operations like creating realms, clients, groups, and users.
  • I do not want to use Keycloak’s default login pages or Admin Console.
  1. Nested Structure:
  • Support for hierarchical structures like:
    • Organization → Product → Clients → Sub-Clients → Users with Roles.
  • Users should belong to groups and sub-groups within their respective realms.
  • Example:
Realm: hrms  
Groups: Main Site, API Only, White-Label  
Sub-Groups: Company A, Company B  
Users: U1, U2, U3 under Company A
  1. Permissions and Roles:
  • Only users with specific admin roles should be able to:
    • Create groups and sub-groups.
    • Manage users and roles.
  • Roles need to be assigned dynamically during user creation.
  1. Scalability and Deployment:
  • Each product might be deployed in different environments or servers.
  • Keycloak should handle multiple realms and clients independently.
  • Plan to use Docker and PostgreSQL for deployment.
  1. SSO Integration:
  • Integrate SSO providers (e.g., Google, Microsoft) for user registration and login.
  • Support SSO for both initial user registration and post-registration login.
  1. Security and Best Practices:
  • Secure token handling and credentials management.
  • Follow best practices for production deployment (e.g., securing admin endpoints, using external databases).

Questions

  1. API-Driven Automation:
  • Can I achieve all the above tasks (creating realms, clients, users, groups, roles, configuring CORS) entirely via REST APIs without using the Admin Console?
  1. White-Label and Multi-Tenancy:
  • What are the best practices for managing white-labeled clients where each client may have their own branding and user management?
  • Should I create a new client for each white-labeled customer within the same realm, or is there a better approach?
  1. Clients vs. Groups:
  • In what scenarios should I use clients vs. groups to segregate users?
  • Can groups be used effectively to manage different organizations within the same realm?
  1. Deployment Strategy:
  • For products deployed in different environments, should I:
    • Use a single Keycloak instance with multiple realms, or
    • Deploy multiple Keycloak instances (one per product)?
  1. SSO Integration:
  • Can I automate the creation of Identity Providers (e.g., Google, Microsoft, Slack) via REST APIs?
  • How can I configure SSO for user registration and login using APIs alone?
  1. Custom Domains and Subdomains:
  • How can I configure different domains and subdomains (e.g., api.xyz.com, client1.zyz.com) for different clients/products?
  • Is it possible to manage routing and DNS configurations for these subdomains through Keycloak?
  1. Scalability and Maintenance:
  • What are the recommended strategies for scaling Keycloak horizontally and maintaining it across multiple environments?

I appreciate any insights, best practices, or recommendations for implementing this architecture with Keycloak.