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

Question

Pulumi · Accepted Answer

To deploy the flanksource-prometheus Helm chart on Azure Kubernetes Service (AKS), you will need to follow these steps:

1. Create an Azure Kubernetes Service (AKS) cluster.
2. Install Pulumi and configure it to use your Azure account.
3. Write a Pulumi TypeScript program to define the AKS infrastructure and deploy the Helm chart.

Below is a detailed explanation and a Pulumi TypeScript program that demonstrates how to achieve this.

### Explanation:

First, you need to create a resource definition for an AKS cluster using the `azure-native` provider, which is the native Azure Resource Manager provider for Pulumi. This allows you to declare the AKS cluster configuration using real Azure resource types and properties as if you were using Azure's own ARM templates.

After setting up the AKS cluster, you will use the `kubernetes` provider in Pulumi to deploy the flanksource-prometheus Helm chart to the cluster. The `kubernetes.helm.v3.Chart` resource is used to deploy Helm charts. You will specify the Helm chart's repository and name, as well as any custom values you wish to provide.

Here is a Pulumi TypeScript program that performs the above steps:

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

// Create an Azure Resource Group
const resourceGroup = new azure.resources.ResourceGroup("resourceGroup");

// Create an AKS cluster
const cluster = new azure.containerservice.ManagedCluster("aksCluster", {
    resourceGroupName: resourceGroup.name,
    agentPoolProfiles: [{
        count: 1,
        vmSize: azure.containerservice.VMSizeTypes.Standard_DS2_v2,
        name: "agentpool",
        mode: "System",
    }],
    dnsPrefix: "akscluster",
});

// Export the kubeconfig of the AKS cluster
export const kubeconfig = cluster.kubeConfig.apply(c => {
    if (c === undefined) {
        throw new Error("kubeconfig property is undefined");
    }

// Accessing kubeconfig raw value from the raw Pulumi output.
    // Pulumi automatically decrypts the kubeconfig secret for you
    return Buffer.from(c, 'base64').toString();
});

// Set up a Kubernetes provider instance using the kubeconfig from the AKS cluster
const k8sProvider = new k8s.Provider("k8sProvider", {
    kubeconfig: kubeconfig,
});

// Deploy the flanksource-prometheus Helm chart
const flanksourcePrometheus = new k8s.helm.v3.Chart("flanksource-prometheus", {
    chart: "prometheus",
    version: "VERSION", // replace with the version of the chart you want to deploy
    fetchOpts: {
        repo: "https://YOUR_HELM_REPO_URL", // replace with the URL of the Helm repository
    },
}, { provider: k8sProvider });

// Export the public IP to access Prometheus
export const prometheusPublicIP = flanksourcePrometheus.getResourceProperty('v1/Service', 'flanksource-prometheus-server', 'status').apply(s => s.loadBalancer.ingress[0].ip);
```

### Instructions:

In the `flanksourcePrometheus` chart resource, replace `VERSION` with the actual chart version you would like to deploy and replace `https://YOUR_HELM_REPO_URL` with the URL of the Helm repository that contains the flanksource-prometheus chart.

After setting up the program, you can use the Pulumi CLI to deploy your AKS cluster and flanksource-prometheus chart:

```sh
# To create a new Pulumi stack (an isolated environment for your project)
pulumi stack init dev

# Preview the deployment changes
pulumi preview

# Deploy your infrastructure to Azure
pulumi up
```

After successfully deploying the stack, Pulumi will output the public IP address of the Prometheus service that you can use to access the Prometheus dashboard in your browser.

This program is a fundamental example of deploying a Kubernetes application using Pulumi and Azure. You can customize the AKS cluster size, Kubernetes version, and other settings according to your needs.