1. Deploy the k8s-ingress helm chart on Kubernetes

    TypeScript

    In this program, we will deploy a Kubernetes Ingress resource using a Helm chart. Helm is a package manager for Kubernetes, which allows you to define, install, and upgrade even the most complex Kubernetes applications. Ingress in Kubernetes is an API object that manages external access to the services in a cluster, typically HTTP. By deploying an Ingress into your cluster, you define rules for routing external HTTP(S) traffic to your internal services.

    We will use the kubernetes.helm.v3.Chart resource from the Pulumi Kubernetes provider to deploy the Kubernetes Ingress. This Pulumi resource allows you to deploy Helm charts from within your Pulumi program. The Chart resource is a high-level interface to Helm's functionality.

    Here is a Pulumi program that deploys the k8s-ingress Helm chart:

    import * as kubernetes from "@pulumi/kubernetes"; const namespace = "default"; // Define the Kubernetes Namespace to deploy the chart in. // A Helm chart for creating an Ingress resource in Kubernetes. const ingressChart = new kubernetes.helm.v3.Chart("k8s-ingress", { chart: "ingress-nginx", version: "3.35.0", // Specify the chart version you want to deploy. Make sure you test the version prior. namespace: namespace, fetchOpts: { repo: "https://kubernetes.github.io/ingress-nginx", // The Helm repository URL where the chart is located. }, }, { dependsOn: [/* other resources that should be created before the ingress */] }); export const ingressUrl = ingressChart.getResourceProperty("v1/Service", "k8s-ingress-nginx-controller", "status").apply(status => status.loadBalancer.ingress[0].ip);

    Explanation

    1. Import the Kubernetes Package: We import the Pulumi Kubernetes package to interact with Kubernetes resources.

    2. Namespace: Define a namespace where your resources should be created. In this example, we are using the default namespace.

    3. Helm Chart: We declare a new Helm chart resource using new kubernetes.helm.v3.Chart. We name our chart k8s-ingress.

      • chart: This is the name of the chart we want to deploy. Here we are deploying the ingress-nginx chart, which will set up an Ingress controller for us.
      • version: Set this to the exact chart version you want to deploy.
      • namespace: The Kubernetes namespace to deploy this chart in. Here, it's the default namespace.
      • fetchOpts: These are additional options to specify the repository where the Helm chart is located. In this example, the ingress-nginx Helm chart is located at https://kubernetes.github.io/ingress-nginx.

    4. Dependencies: (optional) If this ingress depends on any other Kubernetes resources being created first, specify them in the dependsOn option. This ensures resources are created in the correct order.

    5. Export: After the chart is deployed, we export the Ingress load balancer's IP for easy access. This assumes that the ingress-nginx Helm chart creates a Service of type LoadBalancer which will have an external IP.

    Make sure that your Pulumi stack is configured for the correct Kubernetes cluster. This example assumes you have already set up access to your desired Kubernetes cluster outside of the Pulumi program, typically via a kubeconfig file.

    To run this Pulumi program, you will need Node.js and npm installed on your machine as well as the Pulumi CLI. Create a new directory, navigate into it, and run pulumi new kubernetes-typescript to start a new Pulumi project. Replace the contents of index.ts with the code provided above. Then run pulumi up to deploy the Helm chart to your Kubernetes cluster.


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