Deploy the istio-ingress-gateway helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy the Istio Ingress Gateway using a Helm chart on Kubernetes with Pulumi, we will follow these steps:

1. Set up the Pulumi Kubernetes Provider to communicate with your Kubernetes cluster.
2. Use the `kubernetes.helm.v3.Chart` resource from the Pulumi Kubernetes provider to deploy the Istio Ingress Gateway.

First, ensure you have Pulumi installed and configured with the appropriate access to your Kubernetes cluster. This typically means you have a `kubeconfig` file that provides the necessary details to connect to your cluster.

Here's a Pulumi TypeScript program that demonstrates how to deploy the Istio Ingress Gateway using its Helm chart:

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

// Create an instance of the kubernetes.helm.v3.Chart class, which represents a Helm chart.
// This will install the Istio Ingress Gateway chart into our Kubernetes cluster.
const istioIngressGateway = new k8s.helm.v3.Chart("istio-ingress-gateway", {
    chart: "istio-ingress",
    version: "1.0.0", // Replace with the actual version you want to deploy
    fetchOpts: { repo: "https://istio-release.storage.googleapis.com/charts" },
    // Specify any custom values you want to pass to the Helm chart
    values: {
        // For example, you can enable specific features or customize resource requests
        // and limits based on the Helm chart's values schema
        gateways: {
            istio-ingressgateway: {
                type: "LoadBalancer",
                // More customization here based on the specific Helm chart's values
            },
        },
    },
}, { provider: YOUR_KUBERNETES_PROVIDER_INSTANCE }); // Replace with the instance of your Kubernetes provider

// Export the public IP address of the Ingress Gateway
export const ingressIp = istioIngressGateway.getResourceProperty("v1/Service", "istio-ingress/istio-ingressgateway", "status")
    .apply(status => status.loadBalancer.ingress[0].ip);

```

Replace `YOUR_KUBERNETES_PROVIDER_INSTANCE` with an instance of your Kubernetes provider if you are working with multiple clusters or need to provide specific configuration.

This program will deploy the Istio Ingress Gateway as defined by the official Istio Helm chart. The `fetchOpts.repo` field specifies the repository where the Helm chart is located. The `chart` field specifies the name of the chart to deploy, and the `version` field specifies the version number of the chart you want to use.

The `values` field is a map where you can override the default values provided by the Helm chart. Here, we have a placeholder for `gateways.istio-ingressgateway`, where you can specify custom configuration based on your needs and the capabilities of the chart. For instance, you might set the type to `LoadBalancer` if you want to expose the Ingress Gateway externally via a cloud provider's load balancer.

Lastly, we export `ingressIp`, which retrieves the public IP address of the Istio Ingress Gateway service that gets assigned when it is configured as a LoadBalancer type. This IP address can be used to access services within your cluster from outside.

Please note that the above program assumes you have the Istio Helm repository added to your Helm configuration and that you have the correct access permissions to deploy into the cluster. You will also need to ensure that you use the correct chart name and version for Istio. You can find this information in the official [Istio Helm chart documentation](https://istio.io/latest/docs/setup/install/helm/).

To run the Pulumi program:

1. Save the code in a file named `index.ts`.
2. Open a terminal and navigate to the directory where your file is saved.
3. Run `pulumi up` to execute the program, which will deploy the Istio Ingress Gateway to your Kubernetes cluster. You will be prompted to review and confirm the deployment.