Deploy the canary-checker helm chart on Azure Kubernetes Service (AKS)

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Pulumi · Accepted Answer

To deploy the `canary-checker` Helm chart on Azure Kubernetes Service (AKS) using Pulumi, you'll need to perform a few steps. This essentially involves the following:

1. **Provisioning an AKS Cluster**: You would need an active AKS cluster where your Helm chart will be deployed. This process includes configuring the cluster and its associated resources such as networking and identity.

2. **Deploying the Helm Chart**: Once you have the AKS cluster up and running, you'll use Pulumi's Helm Chart resource to deploy `canary-checker`. This involves setting up the Helm release with appropriate values if needed.

Below is a TypeScript program using Pulumi that shows you how to carry out these steps. It assumes you have already set up your Pulumi account, the Pulumi CLI, and Azure CLI as well as logged in to your Azure account. This program will define resources for creating an AKS cluster and deploying `canary-checker` Helm chart onto it.

First, you need to import the required Pulumi packages for Azure and Helm:

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

Next, you will set up the AKS cluster. This includes creating a resource group, defining an application in the Azure AD for the AKS identity, provisioning the AKS cluster with its node pool, and obtaining the Kubeconfig:

```typescript
const name = "canary-aks";

// Create a resource group for the AKS cluster.
const resourceGroup = new azure.core.ResourceGroup(name);

// Create an Azure AD application for the AKS identity.
const app = new azuread.Application(name);

// Create a service principal for the AD application associated to the AKS.
const servicePrincipal = new azuread.ServicePrincipal(name, { applicationId: app.applicationId });

// Create a service principal password.
const servicePrincipalPassword = new azuread.ServicePrincipalPassword(name, {
    servicePrincipalId: servicePrincipal.id,
    endDate: "2099-01-01T00:00:00Z", // Define an appropriate expiration date.
});

// Create an AKS cluster.
const aksCluster = new azure.containerservice.KubernetesCluster(name, {
    resourceGroupName: resourceGroup.name,
    defaultNodePool: {
        name: "agentpool",
        nodeCount: 2,
        vmSize: "Standard_DS2_v2",
    },
    dnsPrefix: name,
    linuxProfile: {
        adminUsername: "adminuser",
        sshKey: {
            keyData: "YOUR_SSH_PUBLIC_KEY_HERE", // Replace with your public key content.
        },
    },
    servicePrincipal: {
        clientId: app.applicationId,
        clientSecret: servicePrincipalPassword.value,
    },

// Enable role-based access control to use Kubernetes RBAC.
    roleBasedAccessControl: { enabled: true },
});

// Obtain the Kubeconfig for the AKS cluster.
const aksKubeconfig = pulumi.
    all([aksCluster.name, resourceGroup.name]).
    apply(([clusterName, rgName]) => {
        return azure.containerservice.getKubernetesCluster({
            name: clusterName,
            resourceGroupName: rgName,
        });
    });

// Create a K8s provider using the Kubeconfig obtained from AKS.
const k8sProvider = new k8s.Provider(name, {
    kubeconfig: aksKubeconfig.kubeConfigs[0].value,
});
```

Now that you have provisioned an AKS cluster, we can proceed with deploying the `canary-checker` Helm chart:

```typescript
// Define a Helm chart resource for the canary-checker chart deployment.
const canaryChart = new k8s.helm.v3.Chart("canary-checker", {
    chart: "canary-checker",
    version: "x.x.x", // Specify the chart version you want to deploy.
    fetchOpts:{
        repo: "https://github.com/flanksource/canary-checker" // Use the correct repository url.
    },
}, { provider: k8sProvider });
```

Once everything is in place, you can execute this Pulumi program by running `pulumi up`. This command will start provisioning the resources as per the defined program above. After the successful completion of the command execution, your `canary-checker` chart would be deployed on your AKS cluster.

Remember to replace `"YOUR_SSH_PUBLIC_KEY_HERE"` with your actual SSH public key and specify the version for `canary-checker` helm chart you want to install. The chart's repository URL should also be the endpoint where the chart is located. If `canary-checker` is not available in a standalone format, you might use a repository from a Helm chart repository such as Flanksource's charts or Bitnami's. Adjust the `.repo` accordingly.

Lastly, you would also need to export any output from Pulumi, for example the AKS cluster's endpoint:

```typescript
export const kubeconfig = aksKubeconfig.kubeConfigs[0].value;
export const clusterName = aksCluster.name;
```

This Pulumi program creates the necessary Azure resources and deploys the `canary-checker` Helm chart on the AKS cluster. It is essential to review the documentation for the individual Pulumi resources used ([Azure Kubernetes Service](https://www.pulumi.com/docs/reference/pkg/azure/containerservice/kubernetescluster/), [Helm Chart](https://www.pulumi.com/docs/reference/pkg/kubernetes/helm/v3/chart/)) and configure them as per your requirements.