Deploy the open-vpn helm chart on Azure Managed Openshift Service

Question

Pulumi · Accepted Answer

To deploy the OpenVPN Helm chart on Azure Managed OpenShift Service using Pulumi, you need to follow several steps:

1. **Set up an Azure Managed OpenShift Cluster**: If you haven't already done so, you'll need to create a managed OpenShift instance in Azure.

2. **Install Helm and Tiller**: Helm is a package manager for Kubernetes, which allows you to deploy applications using pre-defined "charts". Tiller is the server-side component of Helm.

3. **Deploy the OpenVPN Helm chart**: Once Helm and Tiller are set up in your OpenShift cluster, you can deploy the OpenVPN Helm chart to your cluster.

Below you'll find a Pulumi program written in TypeScript. It assumes you have all the necessary prerequisites installed:

- Pulumi CLI
- Azure CLI
- Required Azure permissions to create resources and manage the OpenShift cluster
- Helm CLI (for setting up Helm and Tiller)

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

// Create an Azure Resource Group if it doesn't exist
const resourceGroup = new azure.resources.ResourceGroup("myResourceGroup");

// Create an OpenShift cluster in the resource group
const cluster = new azure.redhatopenshift.OpenShiftCluster("myOpenShiftCluster", {
    resourceGroupName: resourceGroup.name,
    location: resourceGroup.location,
    // Define other required properties such as networkProfile, masterProfile, etc.
    // based on your specific requirements and Azure's documentation.
});

// Once the cluster is created, we need to configure kubectl to interact with the OpenShift cluster.
// This involves obtaining the kubeconfig file from Azure, which can be done using the Azure CLI.
// Pulumi does not natively handle this logic, it should be performed as a separate step.

// Define a Kubernetes provider instance that uses the kubeconfig from our OpenShift cluster
const k8sProvider = new k8s.Provider("openshiftK8s", {
    kubeconfig: cluster.kubeconfig.apply(JSON.stringify),
});

// Now we have the Kubernetes provider set up, let's deploy OpenVPN using a Helm chart.
const openVpnChart = new k8s.helm.v3.Chart("openVpnChart", {
    chart: "openvpn",
    // You can specify the repo or define the chart path if it's locally available
    // OpenVPN might require certain values to be set, such as service type, node ports, etc.
    // These values can be defined in the values object or a separate YAML file
    values: {
        // Assuming OpenVPN Helm chart expects the service type to be NodePort
        service: {
            type: "NodePort",
        },
    },
}, { provider: k8sProvider });

// Export the public IP of the OpenVPN service to access it from the internet
export const openVpnPublicIp = openVpnChart.getResourceProperty("v1/Service", "openvpn-service", "status")
    .apply(status => status.loadBalancer.ingress[0].ip);
```

This program does the following:

- Defines a new Azure resource group using `azure.resources.ResourceGroup`.
- Creates a new Azure Red Hat OpenShift cluster within this resource group using `azure.redhatopenshift.OpenShiftCluster` which corresponds to [Azure Red Hat OpenShift](https://www.pulumi.com/registry/packages/azure-native/api-docs/redhatopenshift/openshiftcluster/).
- Sets up a Kubernetes provider to interact with the newly created OpenShift cluster.
- Deploys the OpenVPN Helm chart within the OpenShift cluster using Pulumi's Kubernetes provider.
- Exports the public IP address tied to the OpenVPN service, which you can use to access the VPN.

Please note that this is a simplified representation. In a real-world scenario, you would need to configure more properties such as the network profile for the OpenShift cluster, values for the OpenVPN chart, and more.

Also, Helm and Tiller setup is not explicitly covered here as it may involve manual steps or additional configuration, and the availability of Helm charts might differ so the specifics of helm chart repo might need to be adjusted (`chart` and `repo` keys in the `openVpnChart`).

Remember to replace the placeholders and adjust configurations according to your scenario.