Deploy the prometheus-beanstalkd-exporter helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the Prometheus-Beanstalkd-Exporter Helm chart on Azure Kubernetes Service (AKS), we will follow these steps:

1. Set up an AKS cluster using Pulumi's Azure Native provider.
2. Configure `kubectl` to communicate with the AKS cluster.
3. Use Pulumi's Helm release resource to deploy the Prometheus-Beanstalkd-Exporter chart to the AKS cluster.

Before writing the program, ensure you have the following prerequisites in place:
- Pulumi CLI installed and configured for use with Azure.
- An Azure account with the appropriate permissions to create resources.
- Azure CLI installed and logged into your Azure account.

Here's the TypeScript program to create an AKS cluster and deploy the Helm chart:

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

// Create an Azure Resource Group
const resourceGroup = new azure.core.ResourceGroup("aksResourceGroup", {
    location: "East US", // You can change the location according to your preference
});

// Create an Azure AD service principal for the AKS cluster
const adApp = new azuread.Application("aks");
const adSp = new azuread.ServicePrincipal("aksSp", {applicationId: adApp.applicationId});
const adSpPassword = new azuread.ServicePrincipalPassword("aksSpPassword", {
    servicePrincipalId: adSp.id,
    endDate: "2099-01-01T00:00:00Z",
});

// Create an AKS cluster
const k8sCluster = new azure.containerservice.KubernetesCluster("aksCluster", {
    resourceGroupName: resourceGroup.name,
    location: resourceGroup.location,
    agentPoolProfiles: [{
        count: 2,
        maxPods: 110,
        mode: "System",
        name: "agentpool",
        osDiskSizeGb: 30,
        osType: "Linux",
        vmSize: "Standard_DS2_v2",
        vnetSubnetId: null, // If you have an existing VNet/Subnet you would like to attach, pass the ID of subnet here
    }],
    dnsPrefix: "aksCluster",
    linuxProfile: {
        adminUsername: "aksuser",
        sshKeys: [{keyData: "ssh-rsa ..."}], // replace ... with your SSH public key
    },
    servicePrincipal: {
        clientId: adApp.applicationId,
        clientSecret: adSpPassword.value,
    },
    kubernetesVersion: "1.18.14",
    roleBasedAccessControl: {enabled: true},
    networkProfile: {
        networkPlugin: "azure",
        serviceCidr: "10.10.0.0/16",
        dnsServiceIp: "10.10.0.10",
        dockerBridgeCidr: "172.17.0.1/16",
    },
}, {dependsOn: [adApp, adSp, adSpPassword]});

// Export the cluster kubeconfig
export const kubeconfig = pulumi.all([k8sCluster.name, resourceGroup.name]).apply(([name, rgName]) => {
    return azure.containerservice.getKubeConfig({
        name: name,
        resourceGroupName: rgName,
    }).then(kubeconfig => kubeconfig.kubeconfigs[0].value);
});

// Create a Kubernetes provider instance that uses our cluster from above.
const k8sProvider = new k8s.Provider("k8sProvider", {
    kubeconfig: kubeconfig,
});

// Deploy the prometheus-beanstalkd-exporter Helm chart
const prometheusBeanstalkdExporter = new k8s.helm.v3.Chart("prometheusBeanstalkdExporter", {
    chart: "prometheus-beanstalkd-exporter",
    // Specify the Helm repository here. This example assumes you have the chart available from a known Helm repo.
    // You may need to add the repository with `helm repo add` command or specify repositoryOpts in ChartArgs.
    fetchOpts: {
        repo: "https://helm-repo.example.com/charts",
    },
    version: "1.0.0", // Specify the version of the chart you want to deploy
    values: {
        // Configure your Helm chart values here, such as replica count or image versions.
    },
}, {provider: k8sProvider});

// Export the Prometheus-Beanstalkd-Exporter service endpoint
export const beanstalkdExporterEndpoint = prometheusBeanstalkdExporter.getResource("v1/Service", "default", "prometheus-beanstalkd-exporter").status.apply(status => status.loadBalancer.ingress[0].ip);
```

Let's break down what the program is doing:

1. **Resource Group**: We create an Azure resource group that will contain our AKS cluster and related resources.

2. **Service Principal**: An Azure Active Directory (AD) service principal is created for the Kubernetes cluster to interact with other Azure services on your behalf. The `azuread.Application`, `azuread.ServicePrincipal`, and `azuread.ServicePrincipalPassword` resources are involved here.

3. **AKS Cluster**: Using the `azure.containerservice.KubernetesCluster` resource, we define the characteristics of our AKS cluster, such as the size of the nodes and the version of Kubernetes.

4. **Kubeconfig Export**: We export the kubeconfig, which will allow `kubectl` and Pulumi's Kubernetes provider to interact with the cluster.

5. **Kubernetes Provider**: This is a Pulumi provider that allows us to deploy Kubernetes resources onto the AKS cluster. It uses the exported kubeconfig from the cluster we created.

6. **Helm Chart Release**: Finally, we deploy the Prometheus-Beanstalkd-Exporter by