How do I control the use of host network and ports in Kubernetes pods?

In this guide, we will demonstrate how to control the use of host network and ports in Kubernetes pods using Pulumi. We will create a Kubernetes Pod that uses the host network and specifies host ports for its containers. This setup can be useful for applications that need to bind to specific network interfaces on the host machine.

Key Points

• We will create a Kubernetes Pod with the hostNetwork option enabled.
• We will specify host ports for the containers within the Pod.
• We will use Pulumi to define and deploy the Kubernetes resources.

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

// Create a Kubernetes Pod
const pod = new k8s.core.v1.Pod("example-pod", {
    metadata: {
        name: "example-pod",
    },
    spec: {
        hostNetwork: true, // Enable host network
        containers: [
            {
                name: "nginx",
                image: "nginx:latest",
                ports: [
                    {
                        containerPort: 80, // Container port
                        hostPort: 8080, // Host port
                    },
                ],
            },
        ],
    },
});

export const podName = pod.metadata.name;

Summary

In this example, we created a Kubernetes Pod named example-pod using Pulumi. The Pod is configured to use the host network and binds the container’s port 80 to the host’s port 8080. This configuration allows the container to directly access the host network interfaces and ports.