Keycloak as Auth Service in Kubernetes for AI Workloads

Question

Pulumi · Accepted Answer

To deploy Keycloak as an authentication service in a Kubernetes cluster for AI workloads, you'll first need to have a Kubernetes cluster up and running. Whether you're using a managed Kubernetes service like Google Kubernetes Engine (GKE), Amazon Elastic Kubernetes Service (EKS), or Azure Kubernetes Service (AKS), or you're managing your own, the process with Pulumi will be similar.

For this use case, we'll use `pulumi_keycloak` to configure Keycloak resources. We'll create a `Realm`, `Client`, and `User` as basic examples of resources Keycloak requires to operate. Keycloak realms manage a set of users, credentials, roles, and groups. A client represents a client application that will interact with Keycloak. Users are individuals who can log in to the client application.

To define these resources in your Pulumi application, you need to have the `pulumi_keycloak` provider installed and configured. Install the provider with Pulumi's `pip` if you haven't done so:

```shell
pip install pulumi_keycloak
```

Once you have the provider installed, you can write a Pulumi program to define your Keycloak configuration. Here is a simple illustration of defining a Keycloak Realm, a Client, and a User in a Python Pulumi program.

```python
import pulumi
import pulumi_keycloak as keycloak

# Create a new Keycloak Realm
keycloak_realm = keycloak.Realm('example-realm',
    realm='example',  # This is the name of the realm
    enabled=True,
)

# Create a new Keycloak Client within the Realm
keycloak_client = keycloak.openid.Client('example-client',
    realm_id=keycloak_realm.id,
    client_id='example-app',  # ID used for the client application
    name='Example App',  # Human-readable name for the client
    enabled=True,
    client_authenticator_type='client-secret',
    protocol='openid-connect',
    access_type='CONFIDENTIAL',
    standard_flow_enabled=True,
    implicit_flow_enabled=False,
    direct_access_grants_enabled=True,
    valid_redirect_uris=['https://example.com/callback', 'https://example-app/auth'],
)

# Create a new Keycloak User within the Realm
keycloak_user = keycloak.User('example-user',
    realm_id=keycloak_realm.id,
    username='example-user',
    enabled=True,
    email='user@example.com',
    email_verified=True,
    firstName='Example',
    lastName='User',
)

# Output the Realm and Client id so it can be easily accessed if needed
pulumi.export('realm_id', keycloak_realm.id)
pulumi.export('client_id', keycloak_client.id)

```

In the above program:
- We import the required modules.
- We create a new `Realm` called 'example'. Realms are the core concept in Keycloak as they partition the Keycloak server into multiple isolated units.
- We create a new `Client` within that realm, which is a representation of your application that will be using Keycloak for authentication.
- We create a new `User` within the realm, representing an individual who will be authenticated by Keycloak.

To apply this Pulumi program, run `pulumi up` in your command line in the same directory as your script.