Deploy the kanister-mongodb-replicaset helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy the `kanister-mongodb-replicaset` Helm chart on Kubernetes using Pulumi, you need to write a Pulumi program in TypeScript that employs the `@pulumi/kubernetes` package. This package provides the necessary components to interact with Kubernetes resources, including deploying Helm charts.

The primary resource utilized from this package will be `Chart`, which represents a Helm Chart resource in a Kubernetes cluster. `Chart` allows you to deploy prepackaged applications published as Helm charts. In your case, you will specify the `kanister-mongodb-replicaset` chart.

Below, you'll find a detailed Pulumi program written in TypeScript that you can use as a starting point. The program defines a new Kubernetes chart for deploying `kanister-mongodb-replicaset`. You will need to specify the repository where the chart is located, the chart name, and any custom values you wish to provide to the chart.

Ensure you have Pulumi installed and configured to access your Kubernetes cluster. If you're running a local Kubernetes cluster (like minikube or Docker Desktop's Kubernetes), Pulumi will use your current kubeconfig context to deploy the resources.

Here's the Pulumi program which deploys the `kanister-mongodb-replicaset` Helm chart on your Kubernetes cluster:

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

// Create an instance of the kubernetes Provider.
const k8sProvider = new kubernetes.Provider("k8s-provider", {
    // You can specify kubeconfig settings if necessary; otherwise, the current context is used
});

// Deploy kanister-mongodb-replicaset Helm chart.
const mongodbReplicaSet = new kubernetes.helm.v3.Chart("kanister-mongodb-replicaset", {
    chart: "kanister-mongodb-replicaset",
    // You would also specify the repository where the chart can be found if it's not in the default repo
    fetchOpts: {
        repo: "https://charts.your-repository.com/", // Replace with the actual repository URL
    },
    // Insert custom values here if needed. For example, you can specify number of replicas, etc.
    values: {
        replicas: 3,
        // ... other custom chart values
    }
}, { provider: k8sProvider });

// Optional: export the chart's name so you can easily retrieve it
export const chartName = mongodbReplicaSet.metadata.name;
```

In this example, we:
- Import the `@pulumi/kubernetes` package to interact with Kubernetes.
- Declare a `k8sProvider`, which is an instance of the Kubernetes provider; it's configured to use the current context from your kubeconfig unless you specify otherwise.
- Use the `Chart` class to represent the `kanister-mongodb-replicaset` Helm chart. The `chart` parameter's value must match the chart you wish to install, and `fetchOpts.repo` should be set to the URL of the Helm repository containing your chart.

You may need to modify the `values` or `fetchOpts.repo` based on the actual chart and repository you are using. The values dictionary can be customized to set various parameters of the Helm chart.

To run this Pulumi program, save the code to a file (for example, `index.ts`), run `npm install @pulumi/kubernetes` to install necessary packages, then execute `pulumi up` from within the same directory as your file.

This will start the deployment process, where Pulumi performs a plan of the requested state and asks for confirmation before proceeding with the changes. Once confirmed, Pulumi applies the changes and the desired resources will be provisioned in your Kubernetes cluster.

Remember to check the documentation and values of the chart you are deploying as some charts might require specific configurations to run correctly.