Deploy the mogenius-metrics-server helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy the `mogenius-metrics-server` Helm chart on a Kubernetes cluster using Pulumi, we can use the `kubernetes.helm.v3.Chart` resource from the Pulumi Kubernetes provider. This resource allows you to deploy Helm charts to a Kubernetes cluster.

Here is a breakdown of the steps included in the program:

1. **Import the necessary libraries**: We'll import Pulumi Kubernetes SDK to interact with Kubernetes resources.

2. **Create a new Helm Chart resource**: Using `new kubernetes.helm.v3.Chart` we will deploy the `mogenius-metrics-server` chart.

3. **Chart Arguments**: When creating the Helm Chart resource, we'll need to specify the `chart` name, `version`, `repo`, `namespace` (optional), and any other configurations if required for the metrics server via `values`. If you don't specify `repo`, make sure that you have added it to your local Helm repositories with `helm repo add`, or else you must provide a `repo` option.

4. **Launching the Program**: Running the Pulumi program will deploy the Helm chart to your Kubernetes cluster. The program assumes that you've already configured Pulumi to use your Kubernetes cluster, either via a kubeconfig file or other means.

Here's the TypeScript program that accomplishes this:

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

// Deploy mogenius-metrics-server chart using the kubernetes.helm.v3.Chart class.
const metricsServerChart = new kubernetes.helm.v3.Chart("mogenius-metrics-server", {
    // If the Helm chart is hosted on a specific Helm repository, specify the `repo` option.
    // Change REPO_URL to the URL of the repository where the chart is located.
    // Otherwise, ensure that the repository is added to Helm with `helm repo add` if
    // using a chart from a known public repository already added to helm.
    repo: "REPO_URL", // Replace REPO_URL with the actual repository URL.
    chart: "metrics-server", // Name of the chart (adjust if the name differs).
    // Optional: Specify the version of the chart.
    version: "CHART_VERSION", // Replace CHART_VERSION with the version you want to deploy.
    // Optional: Specify namespace where the chart will be installed. 
    namespace: "kube-system", // Change or remove if you want a different namespace or the default.
    // Specify any custom values for the chart. This is how you can override chart values.
    values: {
        // For example, if you need to set specific values, uncomment and configure the parameters below.
        // replicaCount: 1,
        // image: {
        //   repository: "mogenius/metrics-server",
        //   tag: "LATEST_TAG", // Replace LATEST_TAG with the desired image tag.
        // },
        // Other custom values that the chart requires.
    },
});

// Export the Chart name of the deployed Metrics Server
export const metricsServerName = metricsServerChart.getResourceProperty("v1/Service", "mogenius-metrics-server-metrics-server", "metadata").apply(m => m.name);
```

When running this Pulumi program, it will use your configured Kubernetes context to deploy the `mogenius-metrics-server` Helm chart onto your cluster. Remember to replace `"REPO_URL"` and `"CHART_VERSION"` with the repository URL and chart version specific to `mogenius-metrics-server`, and uncomment or add the `values` configuration as per the chart's requirements.

To apply this configuration, save the code to a file named `index.ts` and run `pulumi up` in the same directory. The command will create a preview of the deployment and, upon confirmation, apply the changes to your Kubernetes cluster.

Please replace `REPO_URL` and `CHART_VERSION` with the appropriate values for the `mogenius-metrics-server` chart before executing the program. If you don't have the exact details, you'll need to refer to the Helm chart's repository for the required version and values.