Deploy the influxdb-backup helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the InfluxDB backup Helm chart on Azure Kubernetes Service (AKS), you'll need to follow these steps:

1. Set up an AKS cluster if you don't already have one.
2. Install the Pulumi Kubernetes provider to interact with your Kubernetes cluster.
3. Use the Kubernetes Helm Chart resource to deploy the InfluxDB backup Helm chart to your AKS cluster.

First, let's look at how to create a simple AKS cluster. This will involve creating a Resource Group for the cluster, setting up the AKS cluster itself, and configuring it to be able to run Helm charts.

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

// Step 1: Create a new Azure Resource Group.
const resourceGroup = new azure.core.ResourceGroup("aksResourceGroup", {
    location: "East US", // You can choose the location that is best for you.
});

// Step 2: Create the AKS Cluster.
const aksCluster = new azure.containerservice.KubernetesCluster("aksCluster", {
    resourceGroupName: resourceGroup.name,
    location: resourceGroup.location,
    defaultNodePool: {
        name: "akspool",
        nodeCount: 1,
        vmSize: "Standard_B2s", // This is a small-sized VM suitable for basic testing or development.
    },
    identity: {
        type: "SystemAssigned",
    },
    dnsPrefix: "aksClusterDnsPrefix",
});

// Export the kubeconfig.
const creds = pulumi.all([aksCluster.name, resourceGroup.name]).apply(([name, rgName]) =>
    azure.containerservice.listKubernetesClusterUserCredentials({
        name: name,
        resourceGroupName: rgName,
    })
);
export const kubeconfig = creds.kubeconfigs[0].value;
```

The Pulumi program above uses the Pulumi Azure Provider to create a new Azure Resource Group and AKS Cluster within that resource group.

After creating the cluster, we export the `kubeconfig` which is needed to interact with your AKS cluster using tools like `kubectl` and the Pulumi Kubernetes provider.

#### Deploying a Helm Chart

Next, you'll want to deploy the InfluxDB backup as a Helm chart on AKS. To do so, you'll use the Helm chart resource from the Pulumi Kubernetes package.

Here's how you might define the deployment of your Helm chart:

```typescript
// Step 3: Create a Kubernetes Provider instance using the kubeconfig from the AKS cluster.
const k8sProvider = new kubernetes.Provider("k8sProvider", {
    kubeconfig: kubeconfig,
});

// Deploy the influxdb-backup helm chart
const influxdbBackupChart = new kubernetes.helm.v3.Chart("influxdbBackup", {
    chart: "influxdb-backup",
    version: "1.0.0", // Provide the correct version for your specific chart.
    fetchOpts: {
        repo: "https://helm.influxdata.com/", // Replace with the Helm repo URL that contains your chart.
    },
}, { provider: k8sProvider });

// Export the public cluster endpoint to access InfluxDB
export const influxdbEndpoint = aksCluster.kubeConfig.apply(c => c.host);
```

In this Pulumi Kubernetes program:

- We have instantiated a Kubernetes provider which communicates with our AKS cluster using the kubeconfig generated in the previous step.
- Then, we've defined a `Chart` resource, which deploys the `influxdb-backup` Helm chart from the InfluxData Helm repository.
- Lastly, we export the InfluxDB endpoint as a stack output to access the InfluxDB instance outside the cluster.

NOTE:

- The chart version in the code is `1.0.0`, replace this with the actual version number of the chart you wish to deploy.
- The repository URL should point to the location where the InfluxDB backup Helm chart is hosted; replace the `fetchOpts.repo` value with the correct URL.

This example assumes that you are deploying a chart called `influxdb-backup` available in the specified InfluxData Helm repository. If the chart name or repository is different, those will need to be updated accordingly.

After running the Pulumi program, the InfluxDB backup Helm chart will be deployed to your AKS cluster, and you will be able to access its service endpoint using the exported `influxdbEndpoint`.