How Do I Build a Kubernetes Core Configmap With Pulumi?

Introduction

In this guide, we will walk through the process of creating a Kubernetes ConfigMap using Pulumi. ConfigMaps are used to store configuration data in key-value pairs, which can be consumed by your Kubernetes applications. This is particularly useful for separating configuration from application code.

Step-by-Step Explanation

Step 1: Set Up Your Pulumi Project

First, ensure that you have Pulumi installed and configured. If you haven’t already, you can set up a new Pulumi project by running:

pulumi new typescript

This will create a new Pulumi project with a TypeScript template.

Step 2: Install Pulumi Kubernetes Provider

Next, you need to install the Pulumi Kubernetes provider. You can do this by running:

npm install @pulumi/kubernetes

Step 3: Create a ConfigMap

Now, you can create a ConfigMap. In your index.ts file, add the following code:

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

// Create a new ConfigMap
const configMap = new k8s.core.v1.ConfigMap("my-configmap", {
    metadata: { name: "my-configmap" },
    data: {
        "key1": "value1",
        "key2": "value2",
    },
});

export const configMapName = configMap.metadata.name;

This code snippet creates a ConfigMap named my-configmap with two key-value pairs.

Step 4: Deploy the ConfigMap

To deploy the ConfigMap to your Kubernetes cluster, run:

pulumi up

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

Summary

In this guide, we have shown how to create a Kubernetes ConfigMap using Pulumi. We started by setting up a Pulumi project, installing the Kubernetes provider, and then creating and deploying a ConfigMap with key-value pairs. This approach helps in managing configuration data separately from your application code, making your deployments more flexible and manageable.

Full Code Example

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

// Create a new ConfigMap
const configMap = new k8s.core.v1.ConfigMap("my-configmap", {
    metadata: { name: "my-configmap" },
    data: {
        "key1": "value1",
        "key2": "value2",
    },
});

export const configMapName = configMap.metadata.name;