Deploy the kube-oidc-proxy helm chart on Digital Ocean Kubernetes Service

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Pulumi · Accepted Answer

To deploy the kube-oidc-proxy Helm chart on Digital Ocean Kubernetes Service (DOKS), we will use Pulumi's DigitalOcean and Kubernetes providers. The process consists of several steps:

1. Create a DigitalOcean Kubernetes cluster.
2. Set up the Helm chart for kube-oidc-proxy.
3. Deploy the Helm chart to the DOKS cluster.

Below is a step-by-step Pulumi program written in TypeScript that accomplishes this task.

Before you run the following program, ensure that you have Pulumi and the required cloud provider CLI tools installed (in this case, `doctl` for DigitalOcean). You will also need to authenticate with your cloud provider so Pulumi can manage the resources.

Here's a Pulumi program to deploy a kube-oidc-proxy on DOKS:

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

// Step 1: Create a DigitalOcean Kubernetes Cluster
const cluster = new digitalocean.KubernetesCluster("kube-cluster", {
    region: "nyc1", // Replace with your preferred region
    version: "latest", // Use the latest available version of Kubernetes
    nodePool: {
        name: "default",
        size: "s-2vcpu-2gb", // The size slug indicating the kind of Droplets to use in the node pool (this is the smallest size)
        nodeCount: 2, // The number of Droplet instances in the node pool
    },
});

// Step 2: Use a k8s Provider to interact with the DOKS cluster
const k8sProvider = new k8s.Provider("k8s-provider", {
    kubeconfig: cluster.kubeConfigs[0].rawConfig, // Obtains the kubeconfig from the created DOKS cluster
});

// Step 3: Deploy the kube-oidc-proxy Helm Chart
const kubeOidcProxyChart = new k8s.helm.v3.Chart("kube-oidc-proxy", {
    chart: "kube-oidc-proxy",
    version: "0.3.0", // Specify the chart version you want to deploy, change if you want another version
    fetchOpts: {
        repo: "https://charts.jetstack.io", // The repository where the chart is located
    },
    // Specify any values we would want to override. 
    // Here we are presuming that any necessary OIDC issuer and client credentials have already been obtained.
    values: {
        // The values here would be specific to your OIDC provider and your set up. 
        // issuerUrl: "https://your-oidc-issuer-url",
        // clientId: "your-oidc-client-id",
        // clientSecret: "your-oidc-client-secret"
        // And any other required chart values according to the kube-oidc-proxy documentation.
    },
}, { provider: k8sProvider }); // Ensure we use the correct Kubernetes provider

// Export the kubeconfig and the service endpoint to access the proxy later on
export const kubeconfig = cluster.kubeConfigs[0].rawConfig;
export const kubeOidcProxyEndpoint = kubeOidcProxyChart.getResourceProperty("v1/Service", "kube-oidc-proxy", "status").apply(status => status.loadBalancer.ingress[0].ip);
```

This program performs three main tasks:

- It initializes a new DigitalOcean Kubernetes Cluster. You can specify the number of nodes, Droplet size, and Kubernetes version according to your needs.
- It sets up a Kubernetes provider to interact with the newly created cluster, passing the kubeconfig of the cluster as credentials.
- It uses a Helm Chart resource to deploy the kube-oidc-proxy to your DOKS cluster. You will need to fill in the specific configuration values like `issuerUrl`, `clientId`, and `clientSecret` that you'd get from your OIDC provider.

After writing this TypeScript file (`index.ts` within your Pulumi project), you can deploy the infrastructure by running `pulumi up` on the command line.

Remember, the Helm chart values and DigitalOcean cluster configuration should be tailored to your specific OIDC requirements and resource needs.