Deploy the swagger helm chart on Opensshift

Question

Pulumi · Accepted Answer

To achieve the deployment of a Swagger Helm chart on OpenShift using Pulumi, you can use the `kubernetes.helm.sh/v3.Chart` resource from the Pulumi Kubernetes provider. The `Chart` resource allows you to deploy a Helm chart within a Kubernetes cluster. Since OpenShift is a Kubernetes distribution, Pulumi's Kubernetes provider can be used to interact with it, just like with any Kubernetes cluster.

Before getting into the actual Pulumi code, you will need to make sure that you have installed the Pulumi CLI and configured it to interact with your OpenShift cluster. This generally involves logging into your OpenShift cluster using the `oc` CLI tool and ensuring that your `kubeconfig` file has the necessary credentials.

Here's how you could write a Pulumi program to deploy a Swagger Helm chart to OpenShift:

1. Start with the necessary imports.
2. Create a new Helm chart resource, specifying the OpenShift namespace, chart name, and any necessary Helm values.
3. Export any important stack outputs, such as the URL where the deployed Swagger UI can be accessed.

Below is the TypeScript program:

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

// Initialize the OpenShift provider using the current kubeconfig context.
// This assumes you already have the necessary kubeconfig setup for OpenShift.
const provider = new k8s.Provider('openshift-k8s', {
    kubeconfig: process.env.KUBECONFIG,
});

// Deploy the Swagger UI Helm chart using the Pulumi Kubernetes package.
const swaggerHelmChart = new k8s.helm.v3.Chart('swagger-ui', {
    // Replace "swagger" with the actual chart name and specify the repository containing the chart.
    chart: 'swagger',
    version: '3.0.0', // Specify the version of the chart you want to deploy.
    namespace: 'swagger-ui', // Specify the target namespace in OpenShift.
    fetchOpts: {
        repo: 'https://chart-repository-url', // The URL of the Helm chart repository containing the Swagger chart.
    },
    values: {
        // Specify any Helm values here. This is an example to enable ingress.
        ingress: {
            enabled: true,
            annotations: {
                "kubernetes.io/ingress.class": "nginx",
            },
            hosts: [
                {
                    host: "swagger-ui.example.com", // Use the DNS name you want to associate with the Swagger UI.
                    paths: ["/"]
                }
            ]
        },
        // ... other values ...
    },
}, { provider: provider });

// If you have an Ingress setup and would like to export the URL:
export const swaggerUrl = swaggerHelmChart.getResourceProperty('kubernetes:networking.k8s.io/v1:Ingress', 'swagger-ui', 'status').apply(status => {
    const ingress = status.loadBalancer.ingress[0];
    return ingress.hostname ?? ingress.ip;
});

// Note: The actual path to the status field may vary depending on the actual output of your Helm chart.
```

### Explanation:

- We import the Pulumi Kubernetes (`@pulumi/kubernetes`) package, which enables scripting Kubernetes resources.
- We configure the Pulumi provider for Kubernetes to point to your OpenShift cluster by using the `kubeconfig` file environment variable.
- We create a new `Chart` resource, which is Pulumi's representation of a Helm chart. Here, you specify the chart name, version, and repository URL for the Swagger Helm chart. Additionally, you could provide a set of configurations (known as "values" in Helm terminology) to customize the deployment.
- We export the `swaggerUrl`, which might contain the external endpoint for the Swagger UI, assuming the Helm chart creates an Ingress for access. Please note that the specifics of how to retrieve the load balancer status will depend on the actual output of the Swagger Helm chart you are deploying, as Helm charts can expose different outputs.

Remember to replace placeholders like `chart-repository-url` and `swagger-ui.example.com` with actual values for your environment.