Deploy the cloudwatch-agent-prometheus helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy the `cloudwatch-agent-prometheus` Helm chart on Kubernetes using Pulumi, we will use the `@pulumi/kubernetes` package. This package allows us to interact with Kubernetes resources within our Pulumi program. We will create a `Chart` resource, which represents a Helm chart deployment.

Below is a Pulumi program written in TypeScript to accomplish your goal. This program assumes that you have Pulumi installed, have a Kubernetes cluster configured in your `kubeconfig` file, and have access to a Helm chart repository that hosts the `cloudwatch-agent-prometheus` chart.

First, you would install the necessary dependencies by running the following commands:

```sh
pulumi new kubernetes-typescript
npm install @pulumi/kubernetes
```

After setting up the TypeScript project and installing dependencies, you can write the following Pulumi program:

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

// Define the Helm chart by specifying the chart, version, and repository URL
const cloudwatchAgentPrometheusChart = new k8s.helm.v3.Chart("cloudwatch-agent-prometheus", {
    chart: "cloudwatch-agent-prometheus",
    version: "x.y.z", // Replace with the desired chart version
    fetchOpts: {
        repo: "https://your-chart-repo/", // Replace with the Helm chart repository URL
    },
    // Specify custom values for the chart
    values: {
        // You can specify any custom values that you want to override, for example:
        // image: {
        //     repository: "amazon/cloudwatch-agent",
        //     tag: "latest",
        // },
        // For this example, we are assuming the chart already has default values set up
        // so we're not overriding anything.
    },
}, { provider: k8sProvider });

// Export the endpoint of the service
export const endpoint = cloudwatchAgentPrometheusChart.getResourceProperty(
    "v1/Service", "cloudwatch-agent-prometheus", "status"
).apply(status => status.loadBalancer.ingress[0].hostname || status.loadBalancer.ingress[0].ip);
```

In the code above, the `k8s.helm.v3.Chart` class is used to represent and manage the Helm chart directly. You need to replace the placeholder values for the `version` and `repo` options with the version of the chart and the URL to the Helm repository hosting the `cloudwatch-agent-prometheus` chart, respectively. If you have custom configurations (values) for your Helm chart, you can set them in the `values` option.

The `endpoint` export is an optional step, providing the means to access the service endpoint if the Helm chart creates a Kubernetes `Service` of type `LoadBalancer`.

After writing this program, run the following command to deploy the Helm chart:

```sh
pulumi up
```

The `pulumi up` command will prompt you to confirm the deployment after showing you a preview of the changes. Once confirmed, Pulumi will deploy the Helm chart to your Kubernetes cluster.