Deploy the teleport-plugin-email helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the `teleport-plugin-email` Helm chart on Azure Kubernetes Service (AKS), we'll follow a few steps within a Pulumi program:

1. **Create an AKS cluster**: We'll create an AKS cluster that will be the foundation where our services run.
2. **Install the Helm Chart**: After setting up the cluster, we will deploy the `teleport-plugin-email` Helm chart into it, which will manage the Kubernetes resources needed for the plugin.

Here's how you'd do it using the `azure-native` and `kubernetes` packages with Pulumi and TypeScript.

First, you must have Pulumi CLI set up and configured with appropriate Azure access credentials.

Now let's start with the TypeScript program:

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

// Step 1: Create an AKS cluster
const resourceGroupName = new azureNative.resources.ResourceGroup("myResourceGroup");

const k8sCluster = new azureNative.containerservice.ManagedCluster("myAKSCluster", {
    resourceGroupName: resourceGroupName.name,
    agentPoolProfiles: [{
        count: 1,
        maxPods: 110,
        mode: "System",
        name: "agentpool",
        osDiskSizeGB: 30,
        osType: "Linux",
        vmSize: "Standard_DS2_v2",
    }],
    dnsPrefix: pulumi.interpolate`${resourceGroupName.name}-kube`,
    enableRBAC: true,
    kubernetesVersion: "1.20.7",
});

// Export the cluster's kubeconfig
export const kubeconfig = pulumi.all([k8sCluster.name, resourceGroupName.name]).apply(
    ([clusterName, rgName]) => {
        return azureNative.containerservice.listManagedClusterUserCredentials({
            resourceName: clusterName,
            resourceGroupName: rgName,
        }).then(creds => {
            const encoded = creds.kubeconfigs[0].value;
            return Buffer.from(encoded, "base64").toString();
        });
    },
);

// Step 2: Install the `teleport-plugin-email` Helm chart on the created cluster
const k8sProvider = new k8s.Provider("k8sProvider", {
    kubeconfig: kubeconfig,
});

const emailPluginChart = new k8s.helm.v3.Chart("teleport-plugin-email", {
    chart: "teleport-plugin-email",
    // Replace this with the repository that hosts the `teleport-plugin-email` chart
    // You will need the exact chart name and version. Here is an example:
    // version: "1.0.0",
    // repo: "example-repository",
}, { provider: k8sProvider });

// Export the public URL for the email plugin service
// Note: The actual service details might differ based on how the Helm chart sets them up
export const emailPluginUrl = emailPluginChart.getResource("v1/Service", "teleport-plugin-email")
    .status.apply(status => status.loadBalancer.ingress[0].ip);
```

Let's go through what each part of the program is doing:

- We import the necessary Pulumi packages.
- We create a resource group in Azure, which will contain all our resources.
- We create the AKS cluster using the `ManagedCluster` resource; this includes defining properties such as the agent pool profile, DNS prefix, RBAC settings, and Kubernetes version.
- We export the kubeconfig from the created cluster which will allow us to interact with the cluster using kubectl or other Kubernetes tools.
- We set up a Kubernetes provider with our Pulumi program using the generated kubeconfig of the AKS cluster.
- We then install the `teleport-plugin-email` Helm chart to our cluster using the `Chart` resource.
    - Note that you need to specify the Helm repository where the chart is located and the version of the chart. These details need to be obtained from the Helm chart's documentation or repository.

The `emailPluginUrl` export is an example of how you could export the address of a potential LoadBalancer Service deployed by the Helm chart. However, the actual service details might differ based on the Helm chart's configuration. Make sure to reference the specifics of the chart for exact resource names and properties.

Remember, the program must be run in a directory with a Pulumi project (use `pulumi new` to create one if needed). After placing the Pulumi program in an index.ts file in your Pulumi project directory, use the following commands to run the program:

```bash
pulumi up # Preview and deploy changes
```

Once applied, Pulumi will print out the `emailPluginUrl` if the service is LoadBalancer type. If the chart doesn't expose a service or the service type is different, you'll need to query the cluster to get the correct endpoint or adjust the pulumi program accordingly.