1. Deploy the fastapi helm chart on Azure Kubernetes Service (AKS)


    Deploying a FastAPI application on Azure Kubernetes Service (AKS) using a Helm chart can be accomplished with Pulumi's Kubernetes and Azure Native providers. Below, I'll break down the steps required to achieve this and then provide a TypeScript program to carry out the deployment.


    1. Create an AKS Cluster: Begin by provisioning an AKS cluster where our FastAPI application will be hosted.
    2. Deploy Helm Chart: Once the AKS cluster is up and running, we'll use Pulumi's Kubernetes provider to deploy FastAPI using a Helm chart.

    We'll be using the azure-native provider to create the AKS cluster because it's the native Azure provider in the Pulumi ecosystem, and the kubernetes provider to deploy the Helm chart to the cluster.

    Program and Comments

    Here's a TypeScript program that performs the necessary steps:

    import * as pulumi from "@pulumi/pulumi"; import * as azure_native from "@pulumi/azure-native"; import * as k8s from "@pulumi/kubernetes"; import * as azuread from "@pulumi/azure-native/ad"; // Step 1: Create an Azure Resource Group const resourceGroup = new azure_native.resources.ResourceGroup("fastapiResourceGroup"); // Step 2: Create an AKS Cluster // For the sake of brevity and simplicity, we are assuming here that an SSH public key and // service principal credentials are already available and configured in the environment. const sshPublicKey = "your-ssh-public-key"; const clientId = "your-service-principal-client-id"; const clientSecret = "your-service-principal-client-secret"; const aksCluster = new azure_native.containerservice.ManagedCluster("fastapiCluster", { resourceGroupName: resourceGroup.name, agentPoolProfiles: [{ count: 1, maxPods: 110, mode: "System", name: "agentpool", osDiskSizeGB: 30, osType: "Linux", vmSize: "Standard_DS2_v2", }], dnsPrefix: "fastapi-k8s", linuxProfile: { adminUsername: "adminuser", ssh: { publicKeys: [{ keyData: sshPublicKey }], }, }, servicePrincipalProfile: { clientId: clientId, secret: clientSecret, }, }); // Step 3: Using the credentials from the AKS cluster to configure the Kubernetes provider const creds = pulumi.all([resourceGroup.name, aksCluster.name]).apply(([rgName, clusterName]) => azure_native.containerservice.listManagedClusterUserCredentials({ resourceGroupName: rgName, resourceName: clusterName, })); const k8sProvider = new k8s.Provider("k8sProvider", { kubeconfig: creds.apply(creds => Buffer.from(creds.kubeconfigs[0].value, "base64").toString()), }); // Step 4: Deploy FastAPI using a Helm Chart const fastapiChart = new k8s.helm.v3.Chart("fastapiChart", { chart: "fastapi", version: "1.0.0", // replace with the chart version you intend to deploy fetchOpts: { repo: "http://helm-repo-url/", // replace with the Helm repository URL containing FastAPI chart }, }, { provider: k8sProvider });

    This program will:

    • Create a new resource group to host the AKS cluster.
    • Provision an AKS cluster with a single system node pool.
    • Retrieve the kubeconfig from the created AKS cluster.
    • Use the kubeconfig to configure the Pulumi Kubernetes provider.
    • Deploy the FastAPI Helm chart to the AKS cluster.

    Please ensure you replace placeholders like your-ssh-public-key, your-service-principal-client-id, your-service-principal-client-secret, and Helm chart details with actual values.

    Running this Pulumi program will create all the necessary Azure resources and deploy the FastAPI application to AKS.

    To run the Pulumi program:

    1. Set up the Pulumi CLI and authenticate with Azure.
    2. Create a new directory for your Pulumi project and navigate to it.
    3. Run pulumi new typescript to create a new Pulumi TypeScript project.
    4. Replace the auto-generated index.ts content with the TypeScript program provided above.
    5. Run pulumi up to execute the program and provision the resources.

    As a reminder, before executing the program, you need to have the credentials for a service principal that has permissions to create resources in your Azure subscription. The SSH public key should also be accessible for setting up cluster access.