Deploy the postgresql-backup-to-minio helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the `postgresql-backup-to-minio` Helm chart on Azure Kubernetes Service (AKS), you need to follow these steps:

1. **Provision an AKS cluster**: First, you need to provision an Azure Kubernetes Service cluster. You can do this by using the `azure-native.containerservice.KubernetesCluster` resource which will allow you to create a new AKS cluster in your Azure account.

2. **Integrate MinIO**: You would typically run MinIO as a separate service, either within the same Kubernetes cluster or outside. If you need MinIO deployed within the cluster, you can do this using a Helm chart for MinIO as well or deploying it as a separate deployment.

3. **Deploy the PostgreSQL backup Helm chart**: Finally, you can deploy the `postgresql-backup-to-minio` Helm chart. You will need to have Helm configured on your local system and added the chart's repository beforehand.

The following example assumes that you have the Pulumi CLI installed and configured with your Azure account credentials. This program is in TypeScript and will use the Pulumi Azure Native and Kubernetes providers to deploy the resources.

Before running this code, ensure to install the required packages by running:
```
$ npm install @pulumi/azure-native @pulumi/kubernetes
```

Here is a complete Pulumi program that you can use to deploy the `postgresql-backup-to-minio` Helm chart on an AKS cluster:

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

// Create a new resource group
const resourceGroup = new azure.resources.ResourceGroup("my-resource-group");

// Create an AKS cluster
const cluster = new azure.containerservice.KubernetesCluster("my-aks-cluster", {
    resourceGroupName: resourceGroup.name,
    managedClusterName: "myakscluster",
    identity: {
        type: "SystemAssigned"
    },
    agentPoolProfiles: [{
        count: 2,
        maxPods: 110,
        mode: "System",
        name: "agentpool",
        osDiskSizeGB: 30,
        osType: "Linux",
        vmSize: "Standard_DS2_v2",
    }],
    dnsPrefix: "mykube",
    enableRBAC: true,
    kubernetesVersion: "1.20.7",
    // For simplicity, we're using a public network profile.
    // Production workloads typically require a private cluster and network configuration.
    networkProfile: {
        networkPlugin: "kubenet",
    },
});

// Export the kubeconfig
export const kubeconfig = cluster.kubeConfigRaw;

// Create a Kubernetes provider instance that uses the kubeconfig from the AKS cluster
const k8sProvider = new k8s.Provider("k8s-provider", {
    kubeconfig: kubeconfig,
});

// Write your MinIO deployment here if needed...

// Deploy the PostgreSQL backup Helm chart using the k8s Provider
const postgresBackupChart = new k8s.helm.v3.Chart("postgresql-backup", {
    chart: "postgresql-backup-to-minio",
    version: "<chart-version>", // Replace with the chart version
    fetchOpts: {
        repo: "https://charts.bitnami.com/bitnami",
    },
    // You will need to specify the appropriate values for the chart here.
    values: {
        // Add your values for setting up the backup configuration here
    },
}, { provider: k8sProvider });

// Export the Chart name of the PostgreSQL backup
export const postgresBackupChartName = postgresBackupChart.status.name;
```

### Explanation

1. **Resource Group**: The `azure.resources.ResourceGroup` resource is used to create a new resource group in which all the resources like AKS will live.

2. **AKS Cluster**: `azure.containerservice.KubernetesCluster` creates the AKS cluster. We've specified some properties like the number of nodes, VM size, and Kubernetes version. The `kubeConfigRaw` output is used to interact with the AKS cluster.

3. **Kubernetes Provider**: Using the `kubeconfig`, we create an instance of the Pulumi Kubernetes provider. This allows us to deploy Kubernetes resources to the provisioned AKS cluster.

4. **MinIO Deployment**: Before deploying the backup chart, you'd need a MinIO instance. This isn't included, as it's based on your specific configuration and setup. For a production setup, consider deploying MinIO with security and persistent storage configured.

5. **Helm Chart**: We deploy the `postgresql-backup-to-minio` Helm chart using the `k8s.helm.v3.Chart` resource. The `repo` and `version` specify where to fetch the chart from and which version to use. The `values` field is where you would put the necessary values for configuring the backup setup. You'll need to fill this in with configuration that points to your MinIO instance, how often backups should run, and so forth.

6. **Chart Name**: We export the Chart name, which can be useful for operations tasks like upgrades or rollbacks.

After deploying this program, make sure to manage post-deployment activities and monitor your backups in the MinIO location you have configured. Always ensure that your Helm Chart, MinIO, and any sensitive data like passwords or access keys are handled securely and follow best practices when deploying to production environments.