How do I enable HTTP/2 and gRPC in Ingress-NGINX?

To enable HTTP/2 and gRPC in Ingress-NGINX using Pulumi, you’ll need to configure the Ingress Controller to support these protocols. Ingress-NGINX is a popular choice for managing ingress traffic in Kubernetes clusters, and it can be configured to handle HTTP/2 and gRPC traffic.

Here’s a step-by-step guide on how to do this:

Install the Ingress-NGINX Controller: First, you need to deploy the Ingress-NGINX controller in your Kubernetes cluster. This can be done using a Helm chart or a direct manifest.
Configure the Ingress Resource: You need to create an Ingress resource that specifies the backend services and the paths they handle. You will also need to add annotations to enable HTTP/2 and gRPC.
Deploy the Application: Ensure that your backend services are deployed and accessible by the Ingress controller.

Below is a Pulumi program written in TypeScript that accomplishes these tasks:

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

// Create a namespace for the ingress controller
const namespace = new k8s.core.v1.Namespace("ingress-nginx", {
    metadata: { name: "ingress-nginx" },
});

// Deploy the Ingress-NGINX controller using Helm
const nginxIngress = new k8s.helm.v3.Chart("nginx-ingress", {
    chart: "ingress-nginx",
    version: "4.0.6",
    fetchOpts: {
        repo: "https://kubernetes.github.io/ingress-nginx",
    },
    namespace: namespace.metadata.name,
    values: {
        controller: {
            config: {
                "enable-http2": "true",
                "enable-grpc": "true",
            },
        },
    },
}, { provider: new k8s.Provider("k8s-provider") });

// Define a backend service (assuming you have a service named "my-service" in the "default" namespace)
const backendService = new k8s.core.v1.Service("my-service", {
    metadata: {
        name: "my-service",
        namespace: "default",
    },
    spec: {
        ports: [{ port: 80, targetPort: 8080 }],
        selector: { app: "my-app" },
    },
});

// Create an Ingress resource to route traffic to the backend service
const ingress = new k8s.networking.v1.Ingress("my-ingress", {
    metadata: {
        name: "my-ingress",
        namespace: "default",
        annotations: {
            "nginx.ingress.kubernetes.io/backend-protocol": "GRPC",
        },
    },
    spec: {
        rules: [{
            http: {
                paths: [{
                    path: "/",
                    pathType: "Prefix",
                    backend: {
                        service: {
                            name: backendService.metadata.name,
                            port: { number: 80 },
                        },
                    },
                }],
            },
        }],
    },
}, { dependsOn: [nginxIngress] });

export const ingressIp = ingress.status.apply(status => status.loadBalancer.ingress[0].ip);

Explanation

Namespace Creation: We create a namespace ingress-nginx for the Ingress-NGINX controller to isolate its resources.
Ingress-NGINX Controller Deployment: We use the Helm chart for Ingress-NGINX to deploy the controller. The values section is used to configure the controller to enable HTTP/2 and gRPC.
Backend Service: We define a backend service named my-service in the default namespace. This service represents the application that will receive the traffic routed by the Ingress.
Ingress Resource: We create an Ingress resource named my-ingress that routes traffic to the backend service. The annotation nginx.ingress.kubernetes.io/backend-protocol: "GRPC" is used to specify that the backend service communicates using gRPC.
Export the Ingress IP: Finally, we export the IP address of the Ingress resource, which can be used to access the application.

This Pulumi program sets up an Ingress-NGINX controller with HTTP/2 and gRPC support and configures an Ingress resource to route traffic to a backend service. Make sure your backend service is capable of handling gRPC traffic.

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