Deploy the letsencrypt-setup helm chart on Azure Managed Openshift Service

Question

Pulumi · Accepted Answer

To accomplish the deployment of the `letsencrypt-setup` Helm chart on an Azure Managed OpenShift Service, we will create an OpenShift cluster using the `azure-native.containerservice.OpenShiftManagedCluster` resource and then use the `kubernetes.helm.v3.Chart` resource to deploy the Helm chart.

First, we'll need to define and create an OpenShift cluster. The necessary details include a resource group, cluster parameters (such as location and version), and agent pool profiles.

After setting up the OpenShift cluster, we will configure Pulumi to utilize the Kubernetes provider to interact with the newly created cluster. This is necessary for deploying Helm charts. We'll apply the `letsencrypt-setup` Helm chart by specifying the chart name, the repository if it's not a stable chart that's already included, and any values required to configure the chart correctly.

Below is the complete Pulumi program written in TypeScript that will deploy the `letsencrypt-setup` Helm chart on Azure Managed OpenShift Service:

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

// Replace these variables with appropriate values
const resourceGroupName = "myResourceGroup";
const location = "East US"; // Choose the appropriate Azure region
const openshiftClusterName = "myOpenShiftCluster";
const openShiftVersion = "4.6.23"; // Specify the OpenShift version
const agentPoolProfileName = "myAgentPool";
const vmSize = "Standard_DS3_v2"; // Choose the VM size based on your requirements

// Create an Azure resource group
const resourceGroup = new azure_native.resources.ResourceGroup(resourceGroupName, {
    location: location,
});

// Create an Azure Managed OpenShift cluster
const openshiftCluster = new azure_native.containerservice.OpenShiftManagedCluster(openshiftClusterName, {
    resourceName: openshiftClusterName,
    location: location,
    resourceGroupName: resourceGroup.name,
    openShiftVersion: openShiftVersion,
    agentPoolProfiles: [{
        name: agentPoolProfileName,
        role: "compute",
        count: 3, // Define the number of nodes in the cluster
        vmSize: vmSize,
    }],
    // ... other configurations like network profile, etc.
});

// Configure the Kubernetes provider to use the generated kubeconfig for the newly created cluster
const creds = pulumi.all([openshiftCluster.name, resourceGroup.name]).apply(([clusterName, rgName]) => {
    return azure_native.containerservice.listOpenShiftManagedClusterUserCredentials({
        resourceName: clusterName,
        resourceGroupName: rgName,
    });
});

const kubeconfig = creds.kubeconfigs[0].value.apply(value => Buffer.from(value, 'base64').toString());

const k8sProvider = new k8s.Provider("openshift-k8s", {
    kubeconfig: kubeconfig,
});

// Deploy the letsencrypt-setup Helm chart using the kubernetes.helm.v3.Chart resource
const letsEncryptHelmChart = new k8s.helm.v3.Chart("letsencrypt-setup", {
    chart: "letsencrypt-setup",
    // Make sure to specify the correct repository if the chart isn't part of the stable repository.
    // If it's from a custom repo, add `repo: "<custom-repo-url>"` to the ChartArgs
    // Plus, any additional configurations via `values` or other properties as per the chart's requirements.
}, { provider: k8sProvider });

// Export the Kubernetes cluster endpoint
export const clusterEndpoint = openshiftCluster.publicHostname;

// Export the frontend IP to access the letsencrypt-setup service, if applicable
// You would need to ensure the letsencrypt-setup chart exposes a service and grab its external IP
// export const letsEncryptEndpoint = letsEncryptHelmChart.getResourceProperty("v1/Service", "letsencrypt-service", "status").apply(status => status.loadBalancer.ingress[0].ip);
```

### Explanation:

- We start by importing the necessary Pulumi packages to handle Azure-native resources and Kubernetes resources.
- We create a resource group in Azure to organize all resources related to our OpenShift cluster.
- Next, we define and create an Azure Managed OpenShift cluster with one agent pool profile.
- We retrieve the kubeconfig that Pulumi will use to communicate with the Kubernetes cluster created on Azure.
- We define the Kubernetes provider and point it to our OpenShift cluster using the retrieved kubeconfig.
- Using the Kubernetes and Helm provider, we deploy the `letsencrypt-setup` Helm chart onto our OpenShift cluster.
- Finally, we export necessary endpoints, like the cluster endpoint, for potential use in other components or for direct access.

Make sure to replace placeholders in the program with actual values for your use case, such as the resource group name, location, cluster name, OpenShift version, etc.

Please ensure that your Pulumi stack configuration is correctly set up with appropriate Azure credentials, and you have the necessary permissions to create and manage resources in your Azure subscription.