Deploy the ms-generic helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy a Helm chart on OpenShift using Pulumi, you would need to interact with the Kubernetes API via Pulumi's Kubernetes provider. Helm charts are packages of pre-configured Kubernetes resources, and Pulumi can manage these resources just as it would with individual Kubernetes resources, such as Pods or Services.

In this case, to deploy the `ms-generic` Helm chart, we'll create a Pulumi program in TypeScript. Our program will use the `Chart` resource from the Pulumi Kubernetes provider, which represents a Helm chart in a Pulumi program. We will assume that the chart is located in a public or private Helm repository that Pulumi can access. You'll need to replace `chartRepoUrl` with the actual URL of the Helm repository where `ms-generic` is hosted, and provide any required values in the `values` property based on the chart's specifications.

Below is the explanation and an example Pulumi TypeScript program that deploys the `ms-generic` Helm chart on OpenShift:

1. **Setup**: Make sure you have Pulumi installed and configured to connect to your OpenShift cluster. You should have kubectl configured to communicate with your OpenShift cluster as well.

2. **Provider Configuration**: In the code, we import the Pulumi Kubernetes provider and instantiate a new Kubernetes provider instance that Pulumi uses to communicate with your OpenShift cluster. The provider will use your current kubeconfig by default. If you are running OpenShift Dedicated or OpenShift on a cloud, you may have additional configurations to communicate with your cluster.

3. **Helm Chart Resource**: We declare a new Helm chart resource using the `Chart` class from the Pulumi Kubernetes provider. We specify the namespace (assumed to be `"default"` here, but you should replace it with the namespace where you want to deploy the chart), the repository URL where the chart can be found, the chart name `ms-generic`, and any necessary values that the chart requires.

Here's the program:

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

// Replace with the appropriate chart repository URL for ms-generic
const chartRepoUrl = "https://charts.example.com/";
// Replace with any required chart values specific to ms-generic
const chartValues = {
    // example values - these will vary depending on the Helm chart
    replicaCount: 1,
    service: {
        type: "ClusterIP"
    }
};

// Deploy the ms-generic Helm chart to the OpenShift cluster
const msGenericChart = new k8s.helm.v3.Chart("ms-generic", {
    repo: chartRepoUrl,
    chart: "ms-generic",
    version: "1.0.0", // specify the chart version you wish to deploy
    values: chartValues,
    // Namespace where to deploy, make sure this namespace exists on your cluster
    namespace: "default",
}, {
    // Specify the provider if you have multiple clusters
    // and want to select a specific one; otherwise, the default will be used.
    providers: { kubernetes: k8sProvider },
});

// Optionally, export any of the resources' properties
export const chartStatus = msGenericChart.status;

```

Make sure the above script matches your OpenShift cluster's context where you have already configured `kubectl`. Also, ensure that the Helm chart and all its required dependencies are correctly specified.

To use the above code, save it as `index.ts` in a new Pulumi project. Pulumi's CLI commands like `pulumi up` can be used to deploy the chart to your OpenShift cluster. Before running `pulumi up`, you would typically use `pulumi stack init` to create a new stack for the environment you are deploying to (e.g., development, staging, production).

Remember, Helm values are specific to the chart, so you'll need to specify those that match the `ms-generic` Helm chart you mentioned. If the chart has required values that don't have defaults, you'll need to provide them in the `chartValues` object.

To better understand the chart you are deploying, you should refer to its documentation or use the `helm show values` command with Helm CLI to get the list of configurable values for the `ms-generic` chart.