Deploy the istio-fortio helm chart on Linode Kubernetes Engine

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Pulumi · Accepted Answer

To deploy the Istio Fortio Helm chart on Linode Kubernetes Engine using Pulumi, you need to set up a few things. Here are the steps you would typically follow:

1. Set up a Kubernetes cluster in Linode Kubernetes Engine (LKE).
2. Install the Helm CLI tool, which Pulumi uses to deploy Helm charts.
3. Write a Pulumi program that uses the `kubernetes.helm.v3.Chart` resource to deploy the Istio Fortio chart to your LKE cluster.

In this code, I'll demonstrate how to use Pulumi with TypeScript to deploy the Istio Fortio helm chart on a Linode Kubernetes Engine cluster. We'll assume that you already have a Linode Kubernetes Engine cluster up and running and that your local environment is configured with `kubectl` to communicate with your cluster.

Before we start writing the code, make sure you have the following prerequisites:

- Pulumi CLI installed
- `kubectl` configured to connect to your Linode cluster
- Helm CLI installed as Pulumi will use it to deploy the Helm charts

For the purpose of this example, let's consider that Istio and Fortio chart are available in a Helm chart repository. If it's not available in a public repository, you would need to host a Helm chart yourself and reference it accordingly.

Here is the detailed explanation of how we are going to write the TypeScript program using Pulumi to deploy the helm chart:

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

// Provide the name of your Linode Kubernetes cluster
const clusterName = "my-lke-cluster";

// Istio Fortio Helm chart configuration
const istioFortioChart = new k8s.helm.v3.Chart("istio-fortio", {
    chart: "fortio",
    // You would normally specify the repository here, for example:
    // repo: "https://fortio.github.io/fortio",
    // However, you will need to ensure this URL is correct and points to the repository where the Fortio chart is located.
    namespace: "istio-system",
    values: {
        // Here you can specify the configuration options for the Fortio Helm chart.
        // Check the Fortio chart values to see what options you can configure,
        // for example, you could specify the number of replicas, resource limits, etc.
    },
});

// Export the base domain name the fortio service is available at
export const fortioDomainName = istioFortioChart.getResourceProperty("v1/Service", "istio-fortio", "status").apply(status => status.loadBalancer.ingress[0].hostname ?? status.loadBalancer.ingress[0].ip);
```

In the code above, we import the `@pulumi/kubernetes` package, which allows us to interact with Kubernetes resources in Pulumi.

Next, we declare the `clusterName` variable. Replace `"my-lke-cluster"` with the actual name of your Linode Kubernetes Engine cluster.

We then use the `k8s.helm.v3.Chart` resource to declare our Istio Fortio Helm chart. In this resource, we specify the chart, repo (if applicable), and namespace where the chart will be deployed. The `values` property could be used to set configuration options for the Fortio chart.

Lastly, we export `fortioDomainName`, which is the base domain name where the Fortio service should be available. This is pulled from the Kubernetes service created by Fortio Helm chart.

To apply this Pulumi program, save the code to a file called `index.ts`, then run `pulumi up`. Pulumi will perform the deployment according to your configuration. If necessary, Pulumi will ask you to create a new stack, which represents an isolated deployment environment for that instance of your Pulumi program.

Remember, this is a simple example focused on deploying a Helm chart. In a real-world scenario, you'd have additional considerations such as configuring dependencies within the cluster, managing secrets securely, and setting up CI/CD pipelines for continuous deployment.