Deploy the pgbench helm chart on Linode Kubernetes Engine

Question

Pulumi · Accepted Answer

To deploy the `pgbench` Helm chart on Linode Kubernetes Engine (LKE) using Pulumi, you will follow a few high-level steps:

1. **Set up a Kubernetes cluster on Linode**: If you don't have an existing LKE cluster, you'll need to create one. Pulumi can provision a new LKE cluster using the `linode` provider.

2. **Install the Helm chart**:
   You can deploy Helm charts into the LKE cluster using the `kubernetes` provider in Pulumi.

Below is a Pulumi program written in TypeScript that demonstrates these steps. The program assumes that you have already configured your Pulumi CLI with the necessary Linode credentials.

This Pulumi program will:
- Create a new Linode Kubernetes Engine cluster if one does not already exist.
- Deploy the `pgbench` Helm chart into the LKE cluster.

Make sure you have the Pulumi CLI installed and set up with the Linode provider and the Kubernetes provider before running this program.

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

// Create a Linode Kubernetes Engine Cluster.
const cluster = new linode.LkeCluster("my-cluster", {
    label: "my-lke-cluster",
    k8sVersion: "1.23",
    region: "us-central",
    nodePools: [{
        type: "g6-standard-2",
        count: 1,
    }],
});

// Export the kubeconfig of the cluster.
export const kubeconfig = cluster.kubeconfig;

// Set up a Kubernetes provider using the kubeconfig.
const k8sProvider = new k8s.Provider("k8s-provider", {
    kubeconfig: cluster.kubeconfig,
});

// Deploy the 'pgbench' Helm chart into the Kubernetes cluster using the Helm Chart resource.
const pgbenchChart = new k8s.helm.v3.Chart("pgbench-chart", {
    // Replace with the correct repository and chart details if 'pgbench' is not the actual chart name.
    // Alternatively, if you have the chart already downloaded, you can set the `path` property,
    // and Pulumi will use the local chart.
    chart: "pgbench",
    version: "1.0.0", // Specify the version of the chart you want to deploy.
    fetchOpts: {
        repo: "http://charts.example.com/", // Replace with the correct Helm chart repository.
    },
}, { provider: k8sProvider });

// Optional: Expose cluster services using Pulumi outputs.
export const pgbenchService = pgbenchChart.getResource("v1/Service", "pgbench");
```

### Notes:

- Configure `linode.LkeCluster` with appropriate attributes for your project. You may need to change the `k8sVersion` to match an available version in your region, adjust the `region`, and the `nodePools` configuration as needed for your use case.
- In the `k8s.helm.v3.Chart` resource, replace the `chart`, `version`, and `fetchOpts.repo` with the actual values for the pgbench Helm chart. If you have the `pgbench` chart hosted in a repository, specify the repository's URL. If you have the chart locally, you can use the `path` attribute to specify the directory path to the chart instead.
- The kubeconfig generated by creating the Linode cluster is used to configure the Kubernetes provider.
- Exporting resources like `pgbenchService` is useful if you want to capture the deployed Helm chart's Kubernetes resources and expose details about the service, such as endpoints or ports. You can access these outputs with the `pulumi stack output` command after deployment.