Deploy the fintech helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy a Helm chart on a Kubernetes cluster, including one managed by OpenShift, you can use Pulumi's Kubernetes provider to manage the deployment. In this example, I'll show you how to deploy a Helm chart named 'fintech' to an OpenShift cluster using Pulumi and TypeScript.

Before running this program, ensure that you have:
1. An OpenShift cluster already set up and running.
2. Kubectl configured with the context of the OpenShift cluster. Pulumi uses the active context in kubectl.
3. Helm and Pulumi installed on the machine where you'll run this deployment.

Here is a detailed walk-through of the program:

1. **Define the Pulumi stack**: This is a TypeScript project, so we'll start with importing the necessary packages and setting up the stack.
2. **Reference the OpenShift Cluster**: We assume that you have an OpenShift cluster already running. The program will use the current configured context from your `kubectl` configuration.
3. **Use the Helm Chart Resource**: Using Pulumi's Kubernetes package, we'll reference the Helm chart we want to deploy.

Now, let's look at the code:

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

// Assume you already have an OpenShift cluster running and `kubectl` is configured to use the correct context.
// Now we will create a reference to the 'fintech' Helm chart. Assuming the chart is available in a public repository,
// you can specify the `repo` parameter. If it's a local chart, you can set the `path` parameter instead.

const fintechChart = new k8s.helm.v3.Chart("fintech", {
    // Replace with your chart's repository and name
    repo: "your-chart-repo",
    chart: "fintech",

// Specify the chart version, if required
    version: "your-chart-version",

// Set the namespace for the Helm chart. If not specified, it will use the default namespace.
    namespace: "your-namespace",

// If the chart requires any values, specify them in JSON format.
    // These values will override default values in the Helm chart.
    values: {
        // Replace with actual values required by your fintech Helm chart.
        key: "value"
    },

// Configure any additional options if necessary
    fetchOpts: {
        repo: "https://charts.your-chart-repo.com/" // The URL to the repository where your Helm chart is located.
    }
}, { provider: openshiftProvider });

// Note that when referencing an existing OpenShift cluster, you should create and configure a Kubernetes provider
// instance pointing to your cluster. In this case, we're assuming the default provider based on kubectl context.
// If necessary, you can explicitly create an instance of k8s.Provider and pass it to the Chart resource.

// Export the URL for the deployed application (adjust this export based on your chart's actual output)
export const appUrl = fintechChart.getResourceProperty("v1/Service", "fintech-service", "status.loadBalancer.ingress[0].hostname");

// After running `pulumi up`, the command should deploy the fintech Helm chart to your OpenShift cluster.
```

Breakdown of the parameters used in the Helm Chart instantiation:

- `repo`: The repository where your Helm chart is stored. Replace `your-chart-repo` with the actual name of your repository.
- `chart`: The name of the chart you wish to deploy (`fintech` in this case).
- `version`: This is the version of the chart you want to deploy. It is optional and will deploy the latest version if not specified.
- `namespace`: The Kubernetes namespace in which to deploy the chart. If this namespace doesn't exist, Helm will create it as part of the deployment process.
- `values`: These are configuration values that your Helm chart accepts. You will need to replace this section with the configuration required for your application.
- `fetchOpts`: If you are using a custom repository (not one of the default Helm chart repositories), you need to specify it here.

**Important note**: For local Helm charts, replace the `repo` and `fetchOpts` with a `path` parameter pointing to the location of your chart.

To run this program:

1. Save it to a file (e.g., `fintech-deployment.ts`).
2. Initialize a new Pulumi stack if you haven't already with `pulumi stack init`.
3. Run `pulumi up`, which will prompt you to confirm the deployment. Upon confirmation, Pulumi will deploy the chart.

This will kick off the deployment process of the Helm chart onto your OpenShift cluster. Once finished, any exported variables, like `appUrl`, will be displayed in the console's output, which you can use to access your application.