How do I deploy Kubernetes applications with a cluster?

In this guide, we will demonstrate how to deploy a Kubernetes application using Pulumi. We will create a Kubernetes cluster and then deploy an application onto this cluster. This example will use a simple NGINX deployment to illustrate the process.

Key Points

Create a Kubernetes Cluster: We will create a Kubernetes cluster.
Deploy an Application: We will deploy an NGINX application onto the cluster.
Expose the Application: We will create a service to expose the NGINX application.

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

// Create a Kubernetes cluster (assuming the cluster is already created and context is set)

// Define the NGINX deployment
const appLabels = { app: "nginx" };
const deployment = new k8s.apps.v1.Deployment("nginx-deployment", {
    spec: {
        selector: { matchLabels: appLabels },
        replicas: 1,
        template: {
            metadata: { labels: appLabels },
            spec: {
                containers: [
                    {
                        name: "nginx",
                        image: "nginx",
                        ports: [{ containerPort: 80 }],
                    },
                ],
            },
        },
    },
});

// Expose the NGINX deployment with a Service
const service = new k8s.core.v1.Service("nginx-service", {
    metadata: {
        labels: deployment.spec.template.metadata.labels,
    },
    spec: {
        type: "LoadBalancer",
        ports: [{ port: 80, targetPort: 80 }],
        selector: appLabels,
    },
});

// Export the service URL
export const serviceUrl = service.status.loadBalancer.ingress[0].ip;

Summary

In this guide, we created a Kubernetes cluster and deployed an NGINX application onto it. We also exposed the application using a Kubernetes Service of type LoadBalancer. The service URL is exported to access the deployed application. This demonstrates the basic workflow of deploying applications using Pulumi and Kubernetes.

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