Deploy the snmp-exporter helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy an SNMP exporter Helm chart to the Digital Ocean Kubernetes service using Pulumi, you would need to perform the following steps:

1. Create a new Kubernetes cluster on Digital Ocean if you don't already have one.
2. Use Pulumi's Kubernetes provider to deploy the snmp-exporter Helm chart to your new cluster.

I will guide you through a Pulumi TypeScript program that defines a new Kubernetes cluster on Digital Ocean and deploys the snmp-exporter Helm chart onto that cluster.

The program will consist of two primary parts:

- Creating a Kubernetes cluster on Digital Ocean using the `digitalocean.KubernetesCluster` resource.
- Deploying the SNMP exporter Helm chart to the cluster using the `helm.sh/v3.Chart` resource from the Pulumi Kubernetes provider.

First, we'll begin by importing the necessary Pulumi packages and defining the cluster:

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

// Create a Digital Ocean Kubernetes cluster
const cluster = new digitalocean.KubernetesCluster("do-cluster", {
    region: "nyc1",
    version: "1.21.5-do.0", // Specify the version of Kubernetes
    nodePool: {
        size: "s-1vcpu-2gb",
        name: "default-pool",
        nodeCount: 2, // Specify the number of nodes in the pool
    },
});
```

Note that you'll need to choose the Kubernetes version (`version` property) that is supported by Digital Ocean at the time you create the cluster and adjust the region as per your preference.

Next, we'll deploy the snmp-exporter Helm chart. We'll use the `kubernetes.helm.v3.Chart` resource to manage Helm chart deployments. We'll use the pre-configured kubeconfig from the Digital Ocean cluster we just created to tell the Pulumi Kubernetes provider which cluster to deploy to.

```typescript
// Use Pulumi to deploy the snmp-exporter Helm chart
const snmpExporterChart = new k8s.helm.v3.Chart("snmp-exporter", {
    chart: "snmp-exporter",
    version: "0.1.0", // Specify the chart version, modify it to the desired version
    fetchOpts: {
        repo: "https://helm.example.com/", // Replace with the correct Helm chart repository URL
    },
}, { provider: new k8s.Provider("k8s-provider", { kubeconfig: cluster.kubeConfigs[0].rawConfig }) });
```

Replace the `chart` and `version` fields with the name and version of the SNMP exporter Helm chart you wish to use, and the `repo` with the URL of the Helm chart repository where the chart is hosted.

Finally, we need to export the Kubernetes cluster's endpoint and kubeconfig file to interact with our new Kubernetes cluster.

```typescript
// Export the cluster details
export const kubeconfig = cluster.kubeConfigs[0].rawConfig;
export const clusterEndpoint = cluster.endpoint;

```

We define resources in Pulumi asynchronously, which means that Pulumi understands the dependencies between resources and creates them in the correct order.

That's it! You now have a full Pulumi TypeScript program that sets up a Digital Ocean Kubernetes cluster and deploys the SNMP exporter Helm chart to it. Remember to replace placeholder values with real ones, especially the Helm chart details. To execute the Pulumi program, save it to a file, such as `index.ts`, and then run it using the `pulumi up` command while in the same directory.