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Data Flow

Data Flow Diagram

The data flow process involves several key steps, outlined below:

  1. Client Request

    • The client application sends an API request to the system. This request includes an authentication token and the necessary data or parameters for the API endpoint.

  2. Istio Service Mesh

    • The request first passes through the Istio Service Mesh.

  3. Envoy Filter Interception

    • The custom Envoy Filter, written in Go, intercepts the request and begins processing.

  4. Public Key Retrieval

    • The Envoy Filter fetches and caches the public key from Keycloak, which will be used to verify the authentication token.

  5. Token Verification

    • The Envoy Filter verifies the token's signature using the fetched public key. It also checks the token's validity, expiration date, and any other claims.

  6. Role and Permission Check

    • After verifying the token, the Envoy Filter checks the user's roles and permissions encoded within the token.

  7. Revoked Token Check

    • The Envoy Filter fetches and caches revoked tokens from the database, then checks if the token is revoked. If revoked, it responds with an unauthorized message to the client.

  8. Forward Valid Request

    • If the token is valid and the user has the necessary roles and permissions, the Envoy Filter forwards the request to the AI/ML API Server.

  9. ML Model Interaction

    • The API Server interacts with the appropriate machine learning (ML) model(s) based on the functionality requested.

  10. ML Model Processing

    • The ML model(s) process the input data and generate the requested output, such as predictions, classifications, or analyses.

  11. API Response

    • The API Server packages the output from the ML model(s) into an appropriate response format and sends it back to the client application through the secure communication channel.