How Do I Build a Kubernetes Apps Deployment With Pulumi?

Building a Kubernetes Apps Deployment with Pulumi

Introduction

In this guide, we will walk through the process of deploying a Kubernetes application using Pulumi. Pulumi allows you to define your cloud infrastructure using code, and in this example, we will use TypeScript to manage our Kubernetes resources. The key services involved include Pulumi, Kubernetes, and AWS.

Step-by-Step Explanation

Step 1: Install Pulumi and Dependencies

First, ensure you have Pulumi installed. You can install Pulumi using npm:

npm install -g pulumi

Next, install the Pulumi Kubernetes package:

npm install @pulumi/kubernetes

Step 2: Create a New Pulumi Project

Create a new directory for your project and initialize a new Pulumi project:

mkdir pulumi-k8s-app
cd pulumi-k8s-app
pulumi new typescript

Step 3: Define Kubernetes Resources

In your index.ts file, define the Kubernetes resources needed for your application. This typically includes a Deployment, Service, and ConfigMap.

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

const appName = "my-app";
const appLabels = { app: appName };

const configMap = new k8s.core.v1.ConfigMap(appName, {
    metadata: { name: appName },
    data: { "key": "value" },
});

const deployment = new k8s.apps.v1.Deployment(appName, {
    metadata: { name: appName },
    spec: {
        selector: { matchLabels: appLabels },
        replicas: 2,
        template: {
            metadata: { labels: appLabels },
            spec: {
                containers: [{
                    name: appName,
                    image: "nginx",
                    ports: [{ containerPort: 80 }],
                }],
            },
        },
    },
});

const service = new k8s.core.v1.Service(appName, {
    metadata: { name: appName },
    spec: {
        selector: appLabels,
        ports: [{ port: 80, targetPort: 80 }],
        type: "LoadBalancer",
    },
});

Step 4: Deploy the Application

Run the following command to deploy your application:

pulumi up

This will show a preview of the changes and prompt you to confirm the deployment.

Summary

In this guide, we covered the steps to deploy a Kubernetes application using Pulumi with TypeScript. We installed the necessary dependencies, defined the Kubernetes resources, and deployed the application. Pulumi makes it easy to manage cloud infrastructure using code, and using TypeScript allows for a more robust and maintainable setup.

Full Code Example

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

const appName = "my-app";
const appLabels = { app: appName };

const configMap = new k8s.core.v1.ConfigMap(appName, {
    metadata: { name: appName },
    data: { "key": "value" },
});

const deployment = new k8s.apps.v1.Deployment(appName, {
    metadata: { name: appName },
    spec: {
        selector: { matchLabels: appLabels },
        replicas: 2,
        template: {
            metadata: { labels: appLabels },
            spec: {
                containers: [{
                    name: appName,
                    image: "nginx",
                    ports: [{ containerPort: 80 }],
                }],
            },
        },
    },
});

const service = new k8s.core.v1.Service(appName, {
    metadata: { name: appName },
    spec: {
        selector: appLabels,
        ports: [{ port: 80, targetPort: 80 }],
        type: "LoadBalancer",
    },
});