Deploy the octavia-ingress-controller helm chart on Opensshift

Question

Pulumi · Accepted Answer

Deploying a Helm chart on an OpenShift cluster using Pulumi involves several steps, including setting up the OpenShift cluster (if not already done), adding the necessary Helm chart repository, and then deploying the chart.

The `octavia-ingress-controller` Helm chart specifically is part of OpenStack's ecosystem for load balancing. For the purposes of this example, we'll assume you are using an existing OpenShift cluster and focus on deploying the Helm chart using Pulumi's Kubernetes provider.

Before you begin, make sure you have the following prerequisites:

1. An OpenShift cluster running and accessible.
2. `oc` CLI configured to communicate with your OpenShift cluster.
3. Pulumi CLI installed and set up to manage resources.
4. Node.js installed to run the Pulumi program in TypeScript.

Let’s start by describing the steps in the process:

1. **Import Necessary Libraries**: We need to import the Kubernetes package from Pulumi as well as other required node modules.
   
2. **Create a Provider Instance**: Since we're deploying to OpenShift, we'll use the Kubernetes provider. We need to create an instance of this provider, specifying any required configuration that allows Pulumi to communicate with the OpenShift cluster.

3. **Add Helm Chart Repo (if required)**: If the Helm chart we're deploying is not from the stable repository, we might need to add the repository to our Helm configuration.

4. **Deploy Helm Chart**: The last step is to define a Pulumi resource representing the Helm chart we want to deploy. We'll specify the chart name, version, and any custom values that should be applied.

Below is a TypeScript program that illustrates these steps:

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

// Step 1: Existing OpenShift cluster's kubeconfig file is used to create a new instance of the Kubernetes provider
// Make sure `kubeconfig` is properly set up to point to your OpenShift cluster's configuration
const provider = new k8s.Provider("openshift-provider", {
    kubeconfig: process.env.KUBECONFIG,
});

// Step 2: Define the Helm chart for the octavia-ingress-controller from the repository
const octaviaIngressControllerChart = new k8s.helm.v3.Chart("octavia-ingress-controller", {
    chart: "octavia-ingress-controller",
    version: "1.0.0", // specify the desired chart version
    fetchOpts: {
        repo: "http://helm-repository-url/", // The URL for the Helm repository where the chart is located
    },
    // If the chart requires any custom values, specify them in 'values'
    values: {
        // Custom values for the octavia-ingress-controller chart
    },
}, { provider });

// Export the endpoint of the octavia-ingress-controller
export const ingressEndpoint = octaviaIngressControllerChart.getResourceProperty("v1/Service", "octavia-ingress-controller", "status").apply(status => status.loadBalancer.ingress[0].ip);

```

In this program:
- We imported the necessary Pulumi Kubernetes package.
- We instantiated a Kubernetes Provider to interact with the OpenShift cluster using the existing kubeconfig.
- We defined a Helm chart resource using Pulumi's Helm Chart component to deploy the `octavia-ingress-controller` chart.
- We specified the chart version and the repository where the Helm chart is located. Make sure to replace the placeholder `http://helm-repository-url/` with the actual URL of the Helm repository that hosts the chart.
- If there are any custom configurations required by the `octavia-ingress-controller` chart, they need to be provided in the `values` object.

Please replace the `chart`, `repo`, and `values` with the actual data relevant to the `octavia-ingress-controller`. After running the Pulumi program, it will create resources defined in the Helm chart in your OpenShift cluster.

To execute this Pulumi program, you will save it to a file (e.g., `index.ts`), then run the following commands:

```bash
pulumi stack init dev     # Initializes a new stack for your project
pulumi up                # Builds and deploys the resources in the Pulumi program
```

The `pulumi up` command will show a preview of the actions Pulumi is going to take. If everything looks correct, you can confirm the deployment, and Pulumi will proceed to deploy the `octavia-ingress-controller` Helm chart to your OpenShift cluster.

Remember that OpenShift and OpenStack are often part of the same ecosystem, but they are different technologies. Make sure that the `octavia-ingress-controller` Helm chart you wish to deploy is intended for use with OpenShift and not solely within an OpenStack environment. If there is a specific Helm repository and chart version you are working with, make sure to substitute those values in the code provided.