Deploy the flink-kubernetes-operator helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the Flink Kubernetes Operator Helm chart on an Azure Kubernetes Service (AKS) cluster using Pulumi, we will complete the following steps:

1. **Create an AKS cluster**: We will use the `ProvisionedCluster` resource from the `azure-native` package to create an Azure Kubernetes Service cluster.

2. **Deploy the Helm chart**: We will use the `Chart` resource from the `kubernetes` package to deploy the Flink Kubernetes Operator Helm chart onto the AKS cluster.

Here is a step-by-step Pulumi program written in TypeScript that accomplishes these tasks:

### Detailed Explanation

Before starting the Pulumi program:

- Ensure that you have the `azure-native` and `kubernetes` providers installed in your Pulumi project. These are necessary for creating AKS clusters and deploying Helm charts respectively.
- Make sure you have access to an Azure subscription and the necessary permissions to create resources.
- You should also have configured your Pulumi Azure provider with the appropriate credentials.

### Pulumi Program

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

// Step 1: Create an Azure Kubernetes Service (AKS) cluster
// We create a Resource Group to contain the AKS cluster
const resourceGroup = new azure.resources.ResourceGroup('myResourceGroup');

// We define the settings for our AKS cluster
const aksCluster = new azure.containerservice.ManagedCluster('myAKSCluster', {
  resourceGroupName: resourceGroup.name,
  agentPoolProfiles: [{
    count: 2, // Set the number of nodes you want for your AKS cluster
    maxPods: 110,
    mode: 'System',
    name: 'agentpool',
    osDiskSizeGB: 30,
    osType: 'Linux',
    vmSize: 'Standard_DS2_v2',
  }],
  dnsPrefix: `aks-${pulumi.getStack()}`,
  // Enable RBAC for secure interaction with the Kubernetes API
  enableRBAC: true,
  kubernetesVersion: '1.18.14',
  // A Linux profile is required for the Kubernetes cluster
  // Provide an SSH key to use with the Kubernetes cluster
  linuxProfile: {
    adminUsername: 'aksuser',
    ssh: {
      publicKeys: [{
        keyData: process.env.SSH_PUBLIC_KEY, // Replace with your SSH public key
      }],
    },
  },
});

// Export the AKS cluster's kubeconfig
export const kubeconfig = pulumi.
  all([aksCluster.name, resourceGroup.name]).
  apply(([clusterName, rgName]) => {
    return azure.containerservice.listManagedClusterUserCredentials({
      resourceName: clusterName,
      resourceGroupName: rgName,
    });
  }).apply(creds => Buffer.from(creds.kubeconfigs[0].value, 'base64').toString());

// Step 2: Deploy the Flink Kubernetes Operator Helm chart onto the AKS cluster
const flinkOperatorChart = new k8s.helm.v3.Chart('flink-operator', {
  chart: 'flink-kubernetes-operator',
  version: '0.1.0', // Use the version of the chart you want to deploy
  fetchOpts: {
    repo: 'https://my-repository.github.io/charts/', // Replace with the repository where the chart is located
  },
}, {
  provider: new k8s.Provider('k8s-provider', {
    kubeconfig: kubeconfig,
  }),
});

// If you need to specify a custom value, you can add a `values` parameter:
/*
const flinkOperatorChartCustomValues = new k8s.helm.v3.Chart('flink-operator', {
  chart: 'flink-kubernetes-operator',
  version: '0.1.0',
  fetchOpts: {
    repo: 'https://my-repository.github.io/charts/',
  },
  values: {
    // Specify your custom values here
  },
}, {
  provider: new k8s.Provider('k8s-provider', {
    kubeconfig: kubeconfig,
  }),
});
*/
```

In this program:

- We first create an AKS cluster by declaring the necessary `ManagedCluster` with a specific configuration for node size, count, and the version of Kubernetes we want to run. Make sure to replace `process.env.SSH_PUBLIC_KEY` with your actual SSH public key.
- We export the `kubeconfig`, which is necessary for our Kubernetes provider to interact with the AKS cluster.
- We then deploy the Flink Kubernetes Operator using a Helm chart. You need to replace the repository URL in the `fetchOpts` parameter with the actual URL where the Flink Kubernetes Operator Helm chart is located.
- The `Provider` resource is used to make sure that the Helm chart is deployed to the newly created AKS cluster instead of your local or default Kubernetes cluster.
- If needed, you can provide custom values for the Helm chart by adding a `values` parameter to the `Chart` resource.

This program will establish an AKS cluster and deploy the Flink Kubernetes Operator to it. When executing this Pulumi program, the output will contain the `kubeconfig` needed to interact with the AKS cluster using `kubectl`.