Deploy the tyk-dashboard helm chart on Opensshift

Question

Pulumi · Accepted Answer

Deploying a Helm chart on OpenShift involves several steps. We will use Pulumi's Kubernetes provider to accomplish this. Helm charts are a collection of pre-configured Kubernetes resources that can be deployed as a single unit. The `tyk-dashboard` Helm chart deploys Tyk's API management dashboard on a Kubernetes cluster.

Here is how you can deploy the `tyk-dashboard` Helm chart on an OpenShift cluster using Pulumi and TypeScript:

1. **Setting up the Pulumi Project**: Initialize a new Pulumi project and install necessary packages.
2. **Provider Configuration**: Configure Pulumi to use the Kubernetes provider pointed at your OpenShift cluster. This typically requires you have `kubectl` configured correctly locally or you can pass the kubeconfig directly.
3. **Chart Deployment**: Instantiate a `Chart` resource from the `@pulumi/kubernetes` package to deploy `tyk-dashboard`.

Below is a detailed Pulumi program that performs these steps:

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

// Step 1: Configure the OpenShift provider
// Make sure your KUBECONFIG is set up correctly for OpenShift
// or you can pass the kubeconfig directly to the `kubeconfig` parameter.

// Step 2: Deploy the 'tyk-dashboard' Helm chart
const tykDashboardChart = new k8s.helm.v3.Chart("tyk-dashboard", {
    chart: "tyk-dashboard", // This is the chart name
    // Add the repository that hosts the 'tyk-dashboard' chart if it's not in the default repos
    fetchOpts: { 
        repo: "http://helm.tyk.io/public/helm/charts/", // The repository URL
    },
    version: "x.y.z", // Replace with the specific chart version you would like to deploy
    namespace: "tyk", // Specify the namespace in which to deploy, or omit to use the default namespace
    values: { // Override default values from the chart
        // Example: to set up ingress for the dashboard, you could specify `ingress` related values here
        // ingress: {
        //     enabled: true,
        //     annotations: {
        //         "kubernetes.io/ingress.class": "nginx",
        //         // other annotations
        //     },
        //     hosts: [
        //         { host: "dashboard.example.com", paths: ["/"] }
        //     ]
        // },
        // Add other values to configure Tyk Dashboard according to your needs
    },
    // Define any specific configurations related to OpenShift if necessary
    // transformations: [
    //     (obj: any) => {
    //         // For example, modify the security context for OpenShift-specific settings
    //     },
    // ],
}, { provider: openshiftProvider }); // Specify the OpenShift provider if it's not the default

// Option to output any information about the deployed chart, like a URL or other status info
export const dashboardUrl = tykDashboardChart.getResourceProperty("v1/Service", "tyk-dashboard", "status");

// Run `pulumi up` to deploy the chart, and `pulumi stack output dashboardUrl` to retrieve the dashboard URL (if exported).
```

In the code above:

- We import the Pulumi Kubernetes package, which we use to interact with Kubernetes resources.
- We define a Helm chart resource using `new k8s.helm.v3.Chart`.
    - The `chart` parameter specifies the name of the chart to deploy – in this case, `tyk-dashboard`.
    - The `fetchOpts.repo` parameter is where you specify the Helm repository URL if it's not a commonly known repository or not available in Pulumi's default Helm repository set.
    - The `version` parameter specifies the version of the Helm chart that you want to deploy. Replace `"x.y.z"` with the actual version number.
    - The `namespace` parameter specifies which Kubernetes namespace to deploy the chart into. If not provided, it will use the default namespace.
    - The `values` parameter can be used to provide any overrides to the default values that the Helm chart uses. This can include configuration for ingress, resource allocation, environment variables, and others.
- We export `dashboardUrl`, which is designed to extract information from the deployed service, such as the external URL. Replace `"status"` with the appropriate field.

To run this program:

1. Ensure you have the Pulumi CLI and Node.js installed.
2. Set up your Pulumi project by running `pulumi new typescript`.
3. Place the code inside the `index.ts` file that Pulumi creates.
4. Run `pulumi up` to preview and deploy the resources.
5. If needed, you can retrieve any stack outputs by running `pulumi stack output <output-name>`, such as `pulumi stack output dashboardUrl`.

Make sure to replace placeholder values (`x.y.z` for the chart version) and add necessary configurations specific to your deployment scenario. Also, handle the provider configuration to target your Openshift cluster.

If the OpenShift provider needs to be configured in a different way, Pulumi allows you to pass in a `provider` option to your resources. For OpenShift, you might create a Kubernetes provider instance that points to your cluster's configuration endpoint and use that provider when creating resources. However, often, using the default provider that uses your local kubeconfig is sufficient.