Deploy the openid helm chart on Oracle Kubernetes Engine (OKE)

Question

Pulumi · Accepted Answer

Deploying an OpenID enabled Helm chart on Oracle Kubernetes Engine (OKE) involves several steps:

1. **Setting up OKE**: Before deploying Helm charts, you need an OKE cluster. This involves creating a Kubernetes cluster in the OCI (Oracle Cloud Infrastructure) environment.

2. **Configuring Helm for Kubernetes**: Helm is the package manager for Kubernetes and you need to set up Helm in your local environment and also within the Kubernetes cluster. Helm utilizes a component called Tiller which is typically installed into the Kubernetes cluster, but newer Helm versions (v3 and above) don't require Tiller.

3. **Deploying the OpenID Helm Chart**: Once Helm is set up and you have your Kubernetes cluster running, you can deploy a Helm chart that enables OpenID authentication.

For deploying the OpenID Helm chart, I'll provide you with a Pulumi program in TypeScript. I'll be using the `kubernetes` package to interact with our OKE cluster and the `kubernetes.helm.v3.Chart` resource to deploy the OpenID Helm chart.

Here is a Pulumi program that performs the necessary steps to deploy an OpenID enabled Helm chart to your OKE cluster:

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

// Step 1: Assuming you have already created an Oracle Kubernetes Engine (OKE) cluster
// and have the kubeconfig file available, we will use that to configure our Kubernetes provider.

// Load the kubeconfig file from disk
const kubeconfig = pulumi.output(oci.core.getKubeConfig({
    // Replace these with the appropriate values for your OCI/OKE
    clusterId: "ocid1.cluster.oc1..exampleuniqueID",
    tokenVersion: "2.0.0",
}))

const k8sProvider = new k8s.Provider("oke-k8s", {
    kubeconfig: kubeconfig.value,
});

// Step 2: Deploy an OpenID Helm chart using the Helm provider
// This example uses a hypothetical openid Helm chart fetched from an external repository.
const openidChart = new k8s.helm.v3.Chart("openid-chart", {
    chart: "openid",
    version: "1.2.3", // Use the correct chart version
    fetchOpts: {
        repo: "http://helm-repository.example.com/", // Replace with the correct Helm chart repository
    },
    // Specify the values for the OpenID Helm chart. These values will depend on the particular OpenID
    // provider you are using and any configurations they require.
    values: {
        clientId: "my-client-id",
        clientSecret: "my-client-secret",
        issuerUrl: "https://openid-provider.example.com/",
        // Add more OpenID configuration as needed
    },
}, { provider: k8sProvider });

export const chartName = openidChart.name;
```

**Detailed Explanation**:

- We start by importing the necessary Pulumi libraries for OCI, Kubernetes, and general Pulumi functions.
- We assume that the OCI Kubernetes cluster is already provisioned, and thus, we retrieve the kubeconfig of the existing OKE cluster.
- `oci.core.getKubeConfig` is a Pulumi call that fetches the kubeconfig of an OKE cluster which is identified by its `clusterId`.
- We create a Pulumi Kubernetes provider that specifies how to communicate with the cluster by using the retrieved kubeconfig.
- Next, we use `k8s.helm.v3.Chart` to define a Helm chart deployment. We specify the chart name, version, and the repository from which the chart should be fetched.
- The `values` field is used to set the necessary configurations required for OpenID. These values should be changed to match the specific requirements of your OpenID provider and your application. This generally includes client IDs, secrets, and issuer URLs.
- We use the Pulumi export feature to output the name of the Helm chart we deployed. This can be helpful for retrieving deployment details during runtime or from the Pulumi CLI.

**After running this program**, the OpenID Helm chart will be deployed on your OKE cluster, and you should be able to authenticate your applications using OpenID.

Please ensure you have the [Pulumi CLI installed](https://www.pulumi.com/docs/get-started/install/), and you're logged into the [OCI console](https://cloud.oracle.com/). You should also have Helm installed on your local machine if you want to manage Helm releases outside of Pulumi.