Seldon Core Ingress not routing traffic

What is Seldon Core Ingress not routing traffic

Understanding Seldon Core

Seldon Core is an open-source platform designed to deploy machine learning models on Kubernetes. It provides a robust infrastructure for scaling and managing models in production, ensuring that they are served efficiently and reliably. By leveraging Kubernetes, Seldon Core allows for seamless integration with existing cloud-native environments, making it a popular choice for organizations looking to operationalize their machine learning workflows.

Identifying the Symptom: Ingress Not Routing Traffic

One common issue users encounter with Seldon Core is when the ingress is not routing traffic to the deployed models. This symptom is typically observed when requests to the model endpoint do not receive a response or result in a 404 error. This can be frustrating as it prevents the model from being accessed by external clients.

Exploring the Issue: Ingress Resource Misconfiguration

The root cause of ingress not routing traffic often lies in the misconfiguration of the ingress resource. In Kubernetes, an ingress resource defines rules for routing external HTTP/S traffic to services within the cluster. If this resource is not configured correctly, or if necessary annotations are missing, the traffic will not be routed as expected.

Common Misconfigurations

Incorrect host or path definitions in the ingress resource. Missing or incorrect annotations required by the ingress controller. Ingress controller not properly installed or configured.

Steps to Fix the Ingress Routing Issue

To resolve the ingress routing issue, follow these detailed steps:

Step 1: Verify Ingress Resource Configuration

Check the ingress resource configuration to ensure that the host and path are correctly defined. Use the following command to view the ingress resource:

kubectl get ingress -n <namespace> -o yaml

Ensure that the spec.rules section correctly matches the expected host and path for your service.

Step 2: Check for Required Annotations

Annotations are often required by ingress controllers to enable specific features or behaviors. Ensure that the necessary annotations are present. For example, if using NGINX Ingress Controller, you might need:

annotations: nginx.ingress.kubernetes.io/rewrite-target: /

Refer to the NGINX Ingress Controller Annotations documentation for more details.

Step 3: Verify Ingress Controller Installation

Ensure that the ingress controller is installed and running correctly. Check the status of the ingress controller pods:

kubectl get pods -n ingress-nginx

If the pods are not running, refer to the NGINX Ingress Controller Deployment Guide for installation instructions.

Conclusion

By following these steps, you should be able to resolve the ingress routing issue in Seldon Core. Proper configuration of the ingress resource and ensuring the ingress controller is functioning correctly are key to successfully routing traffic to your deployed models. For further assistance, consider exploring the Seldon Core Documentation.