1. Answers
  2. Building an Istio Gateway on Kubernetes

How do I build a Kubernetes networking.istio.io gateway?

In this guide, we will create a Kubernetes Istio Gateway using Pulumi. An Istio Gateway enables you to manage inbound and outbound traffic for your Kubernetes services. We will define the necessary Kubernetes resources to set up the Istio Gateway.

import * as pulumi from "@pulumi/pulumi";
import * as k8s from "@pulumi/kubernetes";

// Define the Istio Gateway resource
const istioGateway = new k8s.apiextensions.CustomResource("istio-gateway", {
    apiVersion: "networking.istio.io/v1beta1",
    kind: "Gateway",
    metadata: {
        name: "my-istio-gateway",
        namespace: "istio-system",
    },
    spec: {
        selector: {
            istio: "ingressgateway", // use Istio's ingress gateway
        },
        servers: [
            {
                port: {
                    number: 80,
                    name: "http",
                    protocol: "HTTP",
                },
                hosts: ["*"],
            },
        ],
    },
});

// Export the gateway's name and namespace
export const gatewayName = istioGateway.metadata.name;
export const gatewayNamespace = istioGateway.metadata.namespace;

Key Points

  • We used the @pulumi/kubernetes package to interact with Kubernetes resources.
  • The CustomResource from apiextensions is used to define the Istio Gateway.
  • The Gateway is configured to listen on port 80 for HTTP traffic and accepts requests to any host.
  • The gateway is deployed in the istio-system namespace and uses Istio’s default ingressgateway.

Summary

We have successfully created an Istio Gateway on Kubernetes using Pulumi. This gateway manages inbound traffic to your services, listening on port 80 and routing HTTP requests to the appropriate services within your cluster.

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