Deploy the open-vpn helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

Deploying an OpenVPN Helm chart on Azure Kubernetes Service (AKS) involves several steps which I will outline below. We will be utilizing the `kubernetes.helm.v3.Chart` resource to deploy the Helm chart after we've set up our Kubernetes cluster with AKS using the `azure-native.containerservice.ManagedCluster` resource. Additionally, we need the Kubernetes provider to interact with the AKS cluster for Helm chart deployment.

Here's the outline of the steps we'll follow in the code:

1. Set up an AKS cluster.
2. Configure the Kubernetes provider to use the cluster's credentials.
3. Deploy the OpenVPN Helm chart to the AKS cluster.

Let's go through each step in detail with our Pulumi TypeScript program.

First, we need to import the necessary packages for Azure-native resources, Kubernetes configuration, and Helm Chart deployment:

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

Next, we create an AKS cluster. This will involve setting up a Resource Group, then creating the ManagedCluster resource within it:

```typescript
const resourceGroup = new azure_native.resources.ResourceGroup("resourceGroup");

const managedCluster = new azure_native.containerservice.ManagedCluster("managedCluster", {
    resourceGroupName: resourceGroup.name,
    // Fill in with necessary configurations for your ManagedCluster
});
```

After creating the cluster, we need to extract the kubeconfig which we'll use to set up the Kubernetes provider:

```typescript
const creds = pulumi.output(azure_native.containerservice.listManagedClusterUserCredentials({
    resourceGroupName: resourceGroup.name,
    resourceName: managedCluster.name,
}));

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

Now, let's configure the Kubernetes provider:

```typescript
const k8sProvider = new kubernetes.Provider("k8sProvider", {
    kubeconfig: kubeconfig,
});
```

Finally, we can deploy the OpenVPN chart using the `kubernetes.helm.v3.Chart` resource. The chart's name and any configuration overrides can be specified in the resource's arguments:

```typescript
const openvpnChart = new kubernetes.helm.v3.Chart("openvpn", {
    chart: "openvpn",
    repo: "some-repo", // You will need to specify the Helm repository where the chart is located
    values: {
        // Any Helm values to override
    },
}, { provider: k8sProvider });
```

Above, replace `some-repo` with the actual Helm repository URL that hosts the OpenVPN chart. Also, add any required Helm values in the `values` property.

Below is the complete Pulumi program to deploy an OpenVPN Helm chart on Azure Kubernetes Service:

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

// Create a resource group
const resourceGroup = new azure_native.resources.ResourceGroup("resourceGroup");

// Create an AKS cluster
const managedCluster = new azure_native.containerservice.ManagedCluster("managedCluster", {
    resourceGroupName: resourceGroup.name,
    // Add other necessary configurations for your ManagedCluster
});

// Retrieve the kubeconfig from the AKS cluster
const creds = pulumi.output(azure_native.containerservice.listManagedClusterUserCredentials({
    resourceGroupName: resourceGroup.name,
    resourceName: managedCluster.name,
}));

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

// Set up the Kubernetes provider using the cluster's kubeconfig
const k8sProvider = new kubernetes.Provider("k8sProvider", {
    kubeconfig: kubeconfig,
});

// Deploy the OpenVPN Helm chart
const openvpnChart = new kubernetes.helm.v3.Chart("openvpn", {
    chart: "openvpn",
    repo: "some-repo", // Replace with your Helm chart's repository
    values: {
        // Override Helm values if necessary
    },
}, { provider: k8sProvider });

// Export the cluster's kubeconfig
export const kubeconfigOut = kubeconfig;
```

Make sure you replace the placeholder values with the actual repository and configurations needed for the OpenVPN chart. To run the Pulumi program, you will need to have Pulumi CLI installed and configured with your Azure credentials. Once set up, you can use the `pulumi up` command to deploy the resources.

Keep in mind that OpenVPN deployment might have specific configuration requirements that you need to follow to ensure secure and proper operation. Always refer to the official OpenVPN chart documentation for detailed instructions and configurations.