How Do I Configure a Kubernetes Core Configmap With Pulumi?

Introduction

In this guide, we will walk through the process of configuring a Kubernetes ConfigMap using Pulumi. A ConfigMap is an API object used to store non-confidential data in key-value pairs. Pods can consume ConfigMaps as environment variables, command-line arguments, or as configuration files in a volume.

Step-by-Step Explanation

Step 1: Install Pulumi and Dependencies

First, ensure you have Pulumi and the necessary dependencies installed. You can do this by running:

npm install @pulumi/pulumi @pulumi/kubernetes

Step 2: Create a New Pulumi Project

Create a new Pulumi project if you don’t already have one:

pulumi new typescript

Step 3: Define the ConfigMap

In your index.ts file, you can define a ConfigMap as follows:

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

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

Step 4: Deploy the ConfigMap

To deploy the ConfigMap, run:

pulumi up

Step 5: Verify the ConfigMap

You can verify the ConfigMap has been created by running:

kubectl get configmaps my-configmap -o yaml

Summary

In this guide, we have shown how to create and deploy a Kubernetes ConfigMap using Pulumi. ConfigMaps are useful for decoupling configuration artifacts from image content to keep containerized applications portable. By using Pulumi, you can manage your Kubernetes resources with code, making it easier to maintain and version control your infrastructure.

Full Code Example

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

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