Deploy the istio-ingress helm chart on Linode Kubernetes Engine

Question

Pulumi · Accepted Answer

To deploy the Istio Ingress Helm chart on Linode Kubernetes Engine (LKE) using Pulumi, you'll need the @pulumi/kubernetes package to interact with Kubernetes resources. Helm charts are a convenient way to package and deploy applications on Kubernetes.

First, let's understand the resources we're going to use:

kubernetes.helm.v3.Chart: This Pulumi resource allows us to deploy Helm charts to a Kubernetes cluster. We will use it to deploy the Istio Ingress Helm chart. When using this resource, we can specify the chart's name, version, repository, and the values we want to override, along with other chart-specific options.

Here's a step-by-step TypeScript program that deploys the Istio Ingress Helm chart to an LKE cluster using Pulumi:

Import Necessary Modules: Bring in the required Pulumi K8s and Helm packages.
Create a Kubernetes Provider: If your Kubeconfig file is not located in the default path (~/.kube/config), you'll need to point the provider to the right file.
Deploy Istio Ingress Helm Chart: Set up a new Helm chart resource for Istio Ingress. Specify the chart name, version, repository URL, and any custom values you might have.

Below is the complete TypeScript program to achieve this:

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

// Create a provider resource to set the context of the Linode Kubernetes Engine cluster.
// By default, it uses the current context from your local kubeconfig. If you have your kubeconfig
// at a non-standard location, you need to point the provider to that location with the kubeconfig property.
const provider = new k8s.Provider('lke-provider', {
  /* If needed:
  kubeconfig: '<path-to-your-kubeconfig>',
  */
});

// Define the settings for the Istio Ingress Helm chart.
const istioIngressChart = new k8s.helm.v3.Chart('istio-ingress', {
  chart: 'istio-ingress',
  version: '<istio-chart-version>', // specify the version you desire
  fetchOpts:{
    repo: 'https://istio-release.storage.googleapis.com/charts',
  },
  // Assuming you have default values you need to overwrite, you can specify that as follows:
  values: {
    /* For example:
    gateways: {
      istio-ingressgateway: {
        service: {
          type: 'LoadBalancer'
        }
      }
    }
    */
  },
}, { provider });

// Export any important information, such as the external IP of the Ingress service.
export const ingressIp = istioIngressChart.getResourceProperty('v1/Service', 'istio-system/istio-ingressgateway', 'status')
  .apply(status => status.loadBalancer.ingress[0].ip);

In the above program, replace <istio-chart-version> with the specific version of the Istio Ingress Helm chart you want to deploy. The values property is optional and used if you need to override default configuration values of the Helm chart.

The last section of the program is the export statement. It allows you to output the external IP address of the Istio ingress gateway service once it is deployed, which you can use to access your Istio-managed services.

Before running this Pulumi program, make sure to have the following prerequisites set up:

Pulumi CLI installed on your machine.
Access to a Linode Kubernetes Engine (LKE) cluster with kubeconfig set up locally.
A Linode account with the Linode Kubernetes Engine (LKE) cluster where the Istio Ingress will be deployed.

You can install any missing NPM packages (like @pulumi/kubernetes) by running npm install for the packages stated in your TypeScript program file (index.ts).

To run this Pulumi program, execute the following command in the directory where your Pulumi TypeScript files are located:

pulumi up

This command will start the Pulumi deployment process and display the planned changes. You should see a summary of the resources Pulumi will create, modify, or delete. Confirm the changes to start the deployment, and once completed successfully, you'll receive the external IP address of the Istio ingress service.