Deploy the pi-gallery2 helm chart on Opensshift

Question

Pulumi · Accepted Answer

Deploying a Helm chart on an OpenShift cluster with Pulumi is a process similar to deploying on a standard Kubernetes cluster but with some OpenShift-specific considerations, such as security contexts and route configuration. OpenShift is built on top of Kubernetes, so the Pulumi Kubernetes provider can be used to manage resources in OpenShift as well.

For our purpose, we will use the `kubernetes.helm.v3.Chart` resource from the Pulumi Kubernetes provider, which allows us to deploy a Helm chart. You will need to have configured your Pulumi environment with the appropriate Kubernetes context that points to your OpenShift cluster.

In this TypeScript program, we are going to deploy the `pi-gallery2` Helm chart on an OpenShift cluster. Replace the placeholders for `chartRepoUrl` with the actual URL of the Helm repository where `pi-gallery2` is hosted.

Here's a commented TypeScript program that you can use to deploy `pi-gallery2` on OpenShift:

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

// Replace with the correct namespace if deploying into a specific OpenShift namespace/project.
const namespace = "default";

// pi-gallery2 Helm chart URL.
// Note: You might want to replace 'chartRepoUrl' with the actual chart repository URL if applicable.
const chartRepoUrl = "https://your-helm-chart-repo-url/";

// Define the Helm chart for pi-gallery2. Make sure to include the repo URL if the chart is not from a stable repo that Helm is aware of by default.
const piGallery2Chart = new k8s.helm.v3.Chart("pi-gallery2", {
    chart: "pi-gallery2",
    // If your Helm chart version is explicit, specify it here.
    // version: "x.y.z",
    fetchOpts: {
        repo: chartRepoUrl,
    },
    namespace: namespace,
    values: {
        // Here you place any custom values you wish to override in the Helm chart.
        // For example:
        // service: {
        //     type: "ClusterIP",
        // },
        // persistence: {
        //     enabled: true,
        //     storageClass: "my-storage-class",
        //     size: "20Gi",
        // },
    },
    transformations: [
        // This is where you can include transformation functions to modify the objects that will be applied to your OpenShift cluster.
        // For OpenShift, you might need to alter security context, add particular annotations, or set up routes rather than ingress.
        // For example:
        // (obj: any) => {
        //     if (obj.kind === "Deployment" && obj.apiVersion === "apps/v1") {
        //         obj.spec.template.spec.securityContext = { ... }; // Set appropriate security contexts
        //     }
        // },
    ],
}, { provider: /* yourOpenShiftProviderHere if required */ });

// Export the base URL for the pi-gallery2 application
export const piGallery2Url = piGallery2Chart.getResourceProperty("v1/Service", "pi-gallery2", "status").apply(status => status.loadBalancer.ingress[0].ip);
```

This code creates an instance of a Helm chart as part of your Pulumi application. It specifies configuration options like the values to override in the Helm chart and gives you a place to transform Kubernetes objects before they are applied to your cluster which is useful for tailoring the Helm chart resources for OpenShift-specific capabilities.

Remember that if the chart is placed behind a private repository, your OpenShift cluster must have the credentials to access that repository, and you may have to specify those credentials in the `fetchOpts`.

After setting up the Pulumi program, run it with the following Pulumi CLI commands:

```sh
# Login to the Pulumi service.
pulumi login

# Create a new Pulumi stack, which is an isolated environment for this instance of your project.
pulumi stack init dev

# Review and deploy the program to create the resources in your OpenShift cluster.
pulumi up
```

Please note that depending on your OpenShift cluster configuration, you might need to handle specific permission setups, security contexts or modify default Helm values to accommodate OpenShift's security and networking model. Always check the `pi-gallery2` chart documentation and OpenShift cluster policies for any particular deployment requirements.

Remember to consult the [Pulumi documentation for the Kubernetes Helm Chart](https://www.pulumi.com/registry/packages/kubernetes/api-docs/helm/v3/chart/) to understand all the available options and parameters you can use with this resource.