Deploy the spring-boot-helm-starter helm chart on Azure Managed Openshift Service

Question

Pulumi · Accepted Answer

To deploy the `spring-boot-helm-starter` Helm chart on an Azure Managed OpenShift Service using Pulumi, you'll need to perform a series of tasks:

1. Set up an Azure Resource Group.
2. Provision an Azure Red Hat OpenShift (ARO) cluster.
3. Configure your Kubernetes provider to point to the ARO cluster.
4. Deploy the Helm chart to the ARO cluster.

Below is a Pulumi program in TypeScript that demonstrates how to perform these tasks:

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

// Step 1: Create a resource group
const resourceGroupName = "openshiftResourceGroup";
const resourceGroup = new azure.resources.ResourceGroup(resourceGroupName);

// Step 2: Provision an Azure Red Hat OpenShift cluster
const openshiftClusterName = "springBootOpenshiftCluster";
const openshiftCluster = new azure.redhatopenshift.OpenShiftCluster(openshiftClusterName, {
    location: resourceGroup.location,
    resourceGroupName: resourceGroup.name,
    // Specify the domain, version, service principal, and other properties according to your requirements.
    clusterProfile: {
        /* Add necessary properties here */
    },
    // Other necessary configurations for ARO...
});

// Output the kubeconfig of the ARO cluster to configure k8s provider
const kubeconfig = openshiftCluster.kubeconfig.apply(c => c.rawData);

// Step 3: Configure the Kubernetes provider to use the kubeconfig from the ARO cluster
const k8sProvider = new k8s.Provider("k8sProvider", {
    kubeconfig,
});

// Step 4: Deploy the Helm chart to the OpenShift cluster
const helmChartName = "spring-boot-starter";
const helmChart = new k8s.helm.v3.Chart(helmChartName, {
    chart: "spring-boot-helm-starter",
    // Specify the repository if the chart is not in the default Helm repo.
    fetchOpts: {
        repo: "https://charts.example.com/",
    },
    // You can add necessary values for the Helm chart deployment as well.
    values: {
        /* Add necessary values here */
    },
}, { provider: k8sProvider });

// Export the URL to access the Spring Boot application
const frontendService = helmChart.getResource("v1/Service", "spring-boot-helm-starter");
export const applicationUrl = pulumi.interpolate `http://${frontendService.status.loadBalancer.ingress[0].ip}/`;

// To apply this Pulumi program, run:
// pulumi up
```

### How the Program Works

- **Resource Group**: We define an Azure resource group which is a container that holds related resources for an Azure solution. [More about Azure Resource Groups](https://www.pulumi.com/registry/packages/azure-native/api-docs/resources/resourcegroup/).

- **ARO Cluster**: We create an instance of Azure Red Hat OpenShift, which gives you a private, managed OpenShift cluster in the cloud. You'll need to fill in the missing properties such as the domain and version you want to use. Ensure to look up the required configurations for these properties in the [OpenShift Cluster documentation](https://www.pulumi.com/registry/packages/azure-native/api-docs/redhatopenshift/openshiftcluster/).

- **Kubernetes Provider**: This is set up to point to the created ARO cluster by using the `kubeconfig` that is output from the ARO cluster provisioned.

- **Helm Chart**: We deploy the `spring-boot-helm-starter` Helm chart to your ARO cluster using Pulumi's Helm support. You'll need to specify the correct Helm repository if the chart isn't located in the default Helm chart repository.

- **Application URL**: We export the external IP of the Service created by the Helm chart so that you can access your deployed Spring Boot application.

### Considerations

- Ensure you have the correct access rights in your Azure subscription to create resources.
- Replace placeholder comments within the `/* ... */` with actual values relevant to your needs.
- The `kubeconfig` value should be treated as sensitive data and stored securely. It contains credentials for accessing your Kubernetes cluster.
- The Helm chart deployment requires you have the Helm chart details such as values to customize the deployment according to your application's requirements.
- Before running `pulumi up`, ensure you have authenticated with Azure using `az login` and set the Pulumi Azure Native provider to the correct subscription using `pulumi config set azure-native:subscriptionId <SUBSCRIPTION_ID>`.