Deploy the mongodb-bi-connector helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy the MongoDB BI Connector using a Helm Chart on a Kubernetes cluster with Pulumi, you'll need to use the `helm.sh/v3.Chart` resource from the Pulumi Kubernetes provider. This resource allows you to deploy applications on a Kubernetes cluster using Helm charts, which are packages of pre-configured Kubernetes resources.

Below is a detailed step-by-step TypeScript program using Pulumi to achieve this.

1. **Import Necessary Packages**:
   We begin by importing the Kubernetes package to interact with Kubernetes resources.

2. **Create a Helm Chart Resource**:
   Next, we define a Helm Chart resource using `new kubernetes.helm.v3.Chart`. The Helm Chart resource is where we specify the chart for the MongoDB BI Connector. You will need to specify the chart name, the version (if desired), the repository where the Helm chart can be found, and any configuration you want to apply on top of the default values provided by the chart.

3. **Specify Configuration Values if Needed**:
   Helm charts generally come with default values, but you can override these values by providing your own configuration object. For instance, you might want to specify a different service type or resource limits for a deployment. In the code, you will see an example of how to pass these configurations.

4. **Deploy the Helm Chart on Kubernetes**:
   Once you've set up the chart resource, Pulumi will handle the deployment to the cluster when you run `pulumi up`. This will use Helm under the hood to deploy the MongoDB BI Connector as per the chart's specifications.

Here's the complete Pulumi program:

```typescript
import * as kubernetes from '@pulumi/kubernetes';

// Define the Helm Chart for MongoDB BI Connector
const mongodbBiConnectorChart = new kubernetes.helm.v3.Chart('mongodb-bi-connector', {
  // Replace with the actual Helm chart repository URL or name
  repo: 'my-helm-repository', // You need to replace 'my-helm-repository' with the actual repository name
  chart: 'mongodb-bi-connector',
  // Specify the chart version you want to deploy if necessary
  version: 'x.y.z', // Replace 'x.y.z' with the desired chart version
  // You can provide a custom values object to override chart values
  values: {
    // Example of custom values. The actual values will depend on the chart you are using.
    // service: {
    //   type: 'NodePort',
    // },
    // resources: {
    //   limits: {
    //     cpu: '100m',
    //     memory: '256Mi',
    //   },
    //   requests: {
    //     cpu: '100m',
    //     memory: '256Mi',
    //   }
    // },
    // ... other custom configurations
  }
}, { provider: myK8sProvider }); // Replace `myK8sProvider` with a reference to your Kubernetes provider if necessary.

// Export the base URL for the deployed MongoDB BI Connector (if relevant), which may be useful for accessing the service.
export const mongoBiConnectorBaseUrl = mongodbBiConnectorChart.getResourceProperty('v1/Service', 'mongodb-bi-connector', 'status').apply(s => `http://${s.loadBalancer.ingress[0].hostname}`);
```

Just as a reminder, replace `'my-helm-repository'`, `'mongodb-bi-connector'`, `'x.y.z'`, and `myK8sProvider` with the actual values for your deployment. `myK8sProvider` should be replaced with an instance of a Kubernetes provider that points to your desired cluster if it's not the default one configured with Pulumi.

In the exported variable `mongoBiConnectorBaseUrl`, we assume that the service created by the Helm chart is of type `LoadBalancer`, and we're looking to export its hostname. This may not be the case for your own deployment, so please adjust this part as per the type of service (LoadBalancer, NodePort, ClusterIP, etc.) and the actual output you wish to export. If you're using a different kind of service, the way you determine the base URL might be different.

Run the Pulumi program by executing the following commands:

1. Initialize a new Pulumi project if you haven't already done so:

```shell
   pulumi new typescript
   ```

2. Install the Kubernetes package:

```shell
   npm install @pulumi/kubernetes
   ```

3. Place the code into your `index.ts` file and replace placeholder values where necessary.

4. Run `pulumi up` to preview and deploy the changes.

This program will deploy the MongoDB BI Connector Helm chart to your Kubernetes cluster, and it will output the base URL that you can use to interact with the BI Connector service.