Using kubernetes k8s.nginx.org with image.toolkit.fluxcd.io

Question

Pulumi · Accepted Answer

To achieve the goal of using Kubernetes with k8s.nginx.org (Nginx Ingress Controller) and image.toolkit.fluxcd.io (FluxCD for continuous deployment), you will be setting up an Nginx Ingress Controller in your Kubernetes cluster to manage external access to the services in the cluster, and you will configure FluxCD to automate the deployment of applications.

Pulumi allows you to define infrastructure using real programming languages. In this case, we'll be using TypeScript to define our Kubernetes resources. Below is a step-by-step process outlining how you can use Pulumi to accomplish your goal.

First, you'll need to import the necessary Pulumi packages for working with Kubernetes and the specific packages for the Nginx ingress controller (kubernetes-ingress-nginx) and FluxCD (flux).

You'll create the following resources:

An Ingress Controller, using the Nginx community's Helm chart, to manage ingress into your Kubernetes cluster.
A FluxCD configuration that synchronizes your cluster state with a Git repository where your Kubernetes manifests are stored.

Step-by-Step Program:

Nginx Ingress: You'll define a helm.v3.Chart resource for the ingress-nginx controller. This will install the Nginx Ingress using its Helm chart.
FluxCD: You'll also define another helm.v3.Chart for FluxCD, which will install FluxCD in your cluster and connects it to a Git repository.

The helm.v3.Chart resource simplifies deploying Helm charts. Pulumi will interact with your Kubernetes cluster to apply these charts just as if you were using helm from the command line.

Here's the code that illustrates the process:

import * as k8s from "@pulumi/kubernetes";
import * as k8sInputs from "@pulumi/kubernetes/types/input";

// Create an Nginx Ingress Controller using the Nginx community's Helm chart.
const nginxIngressController = new k8s.helm.v3.Chart("nginx-ingress", {
    chart: "ingress-nginx",
    repo: "ingress-nginx",
    version: "3.23.0",
    namespace: "nginx-ingress",
    // The `values` parameter allows you to provide a values file or to override settings in the chart.
    values: {
        controller: {
            publishService: {
                enabled: true,
            },
        },
    },
}, { dependsOn: [ /* dependencies if any */] });

// Deploy FluxCD into the cluster using its Helm chart to automate your deployments.
const fluxCDB = new k8s.helm.v3.Chart("fluxcd", {
    chart: "flux",
    repo: "fluxcd",
    version: "1.8.0",
    namespace: "flux",
    // Configuration values for the Flux chart.
    values: {
        git: {
            url: "git@github.com:<your-org>/<your-repo>.git", // Replace with your Git repository URL
            path: "namespaces,workloads",
            branch: "main",
        },
        sync: {
            interval: "1m",
        },
    },
}, { dependsOn: [nginxIngressController] });

// Export the public IP or Hostname of the Nginx Ingress if needed
export const ingressIp = nginxIngressController.getResourceProperty("v1/Service", "nginx-ingress-controller", "status")
    .apply(status => status.loadBalancer.ingress[0].ip || status.loadBalancer.ingress[0].hostname);

The above program accomplishes the following:

It installs the Nginx Ingress Controller in a namespace called nginx-ingress. The publishService setting is enabled to allow the ingress controller to be accessed from outside the Kubernetes cluster.
It sets up FluxCD in a namespace called flux, configured to pull from a Git repository which you need to specify in the url field. You must also specify the path where your Kubernetes manifests are located and the branch to be observed.
It exports the public IP or hostname of the Nginx Ingress Service, which will be the entry point for traffic from outside your Kubernetes cluster.

Please ensure that you have Pulumi installed and configured with access to a Kubernetes cluster. Replace the placeholders in the Git repo URL (e.g., <your-org>, <your-repo>) with your actual information.

If you don't have a Helm chart for the Nginx Ingress Controller, please set up a repository or use the default one. Additionally, ensure that the Git repository specified in the FluxCD Helm chart values is a valid FluxCD configuration repository, containing all necessary Kubernetes manifest files.

Lastly, install the Pulumi CLI, configure it for your Kubernetes cluster, and then run pulumi up to deploy these configurations to your cluster.