Deploy the cubefs helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the CubeFS helm chart on Azure Kubernetes Service (AKS), we need to follow these steps:

1. **Provision an AKS cluster**: We will create a Kubernetes cluster on Azure using Pulumi's `azure-native` provider. This cluster will be the environment where our applications will run.

2. **Configure kubectl**: After the cluster is created, we need to fetch the credentials in order to use `kubectl`, a command-line tool to interact with Kubernetes clusters.

3. **Install Helm and deploy the CubeFS chart**: Finally, we will utilize Pulumi's `kubernetes` provider to install the CubeFS Helm chart into our AKS cluster. Helm is a package manager for Kubernetes, which makes it easier to deploy and manage applications.

Below is the TypeScript program that automates these steps using Pulumi:

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

// Define the AKS cluster configuration.
const clusterConfig = {
    resourceGroupName: "myResourceGroup", // Replace with your resource group name.
    clusterName: "myAksCluster", // Replace with your desired AKS cluster name.
    location: "WestUS", // Replace with your desired Azure location.
    nodeCount: 2, // Replace with the desired number of nodes in your AKS cluster.
    nodeSize: "Standard_DS2_v2", // Replace with the desired VM size for AKS nodes.
};

// Step 1: Provision an AKS cluster
const aksCluster = new azureNative.containerservice.ManagedCluster(clusterConfig.clusterName, {
    // Resource configuration
    resourceGroupName: clusterConfig.resourceGroupName,
    location: clusterConfig.location,
    // Kubernetes cluster configuration
    kubernetesVersion: "1.20.5", // Replace with the desired Kubernetes version.
    agentPoolProfiles: [{
        name: "agentpool",
        count: clusterConfig.nodeCount,
        vmSize: clusterConfig.nodeSize,
        mode: "System",
    }],
    // Enable RBAC for the Kubernetes cluster
    enableRBAC: true,
});

// Export the AKS cluster's kubeconfig.
export const kubeConfig = aksCluster.kubeConfig.apply(c => Buffer.from(c, "base64").toString("utf-8"));

// Step 2: Create a k8s provider instance using kubeconfig from the newly created AKS cluster.
const k8sProvider = new k8s.Provider("k8sProvider", {
    kubeconfig: kubeConfig,
});

// Step 3: Install the CubeFS Helm chart
const cubeFsChart = new k8s.helm.v3.Chart("cubefs", {
    chart: "cubefs", // Replace with the correct chart name if different.
    version: "1.0.0", // Replace with the specific chart version you want to deploy.
    fetchOpts: { repo: "https://your-helm-chart-repository/" }, // Replace with the actual Helm repository.
}, { provider: k8sProvider });

// Export the URL to access the CubeFS dashboard if available.
export const cubeFsDashboardUrl = cubeFsChart.getResourceProperty("v1/Service", "cubefs", "status")
    .apply(status => status.loadBalancer.ingress[0].ip || status.loadBalancer.ingress[0].hostname);

```

This program starts by importing the necessary Pulumi packages and accurately defines our AKS cluster with settings such as the resource group name, cluster name, Azure location, and the desired number of nodes and VM size.

It then provisions an AKS cluster with the specified configuration, making sure to enable RBAC, which is a good security practice.

Next, we export the kubeconfig of the AKS cluster, which allows us to interact with the AKS cluster using `kubectl` commands.

Following that, we create a Pulumi Kubernetes provider to interact with the newly created AKS cluster. This provides the context for deploying Kubernetes resources, ensuring they go to the right cluster.

Finally, we deploy the CubeFS Helm chart using the Kubernetes provider. Make sure to replace the placeholder values with the actual chart name, version, and repository.

The last line exports the dashboard URL for CubeFS, which you could use to access the CubeFS web UI. Ensure the output is accurate based on your Helm chart's services and ingress configuration.

With this program, you automate the entire process of setting up AKS and deploying a CubeFS Helm chart, making it easy to reproduce or change in the future.

Remember to replace the placeholders in the code with your specific details. The program assumes you have already set up your Pulumi CLI and Azure authentication.