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

Question

Pulumi · Accepted Answer

To deploy the Keystone Helm chart on Oracle Kubernetes Engine (OKE), you will follow these steps:

1. Set up an OKE cluster where your applications will run.
2. Prepare your Kubernetes configuration to interact with the OKE cluster.
3. Use Helm, a package manager for Kubernetes, to deploy the Keystone application using its Helm chart.

Below is a TypeScript program written using Pulumi that sets up an OKE cluster and deploys the Keystone Helm chart to it. I will explain each part of the program in the comments.

First, we begin by importing the required Pulumi and provider packages:

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

The `oci` package is used to communicate with Oracle Cloud Infrastructure and manage resources there, such as the OKE cluster. The `k8s` package is used to deploy Helm charts to a Kubernetes cluster.

We will not be creating the OKE cluster in this script. For the sake of simplicity, let's assume that the OKE cluster already exists and you have the Kubernetes configuration file (`kubeconfig`) necessary to interact with it.

Now, let's use Pulumi to deploy the Keystone Helm chart on the OKE cluster:

```typescript
// A namespace for your Helm chart's resources
const namespace = new k8s.core.v1.Namespace("keystone-ns", {}, { provider: k8sProvider });

// Deploy the Keystone Helm chart
const keystoneChart = new k8s.helm.v3.Chart("keystone", {
    chart: "keystone",
    version: "X.Y.Z", // replace with the desired chart version
    namespace: namespace.metadata.name,
    // Add configuration values as needed for your Keystone deployment
    values: {
        // Replace with the actual values you need for your deployment
        // Refer to chart's values.yaml or the chart documentation for reference
    },
}, { provider: k8sProvider });

// Export the endpoints, if required
export const keystoneEndpoint = keystoneChart.getResourceProperty("v1/Service", "keystone", "status").apply(status => {
    return status.loadBalancer.ingress[0].ip || status.loadBalancer.ingress[0].hostname;
});
```

In this script:

- We create a Kubernetes namespace resource for organizational purposes and to avoid conflicts with other applications.

- We declare a `Chart` resource named `keystone`, using the Helm chart named `keystone`. Make sure to replace `"X.Y.Z"` with the actual version of the Keystone chart you want to use. If you're unsure what to put in the `values` object, take a look at the chart's `values.yaml` or the chart's documentation for configuration options.

- Lastly, we export an endpoint that would help you access the Keystone application once it's deployed. This depends on having a service of type `LoadBalancer` created by the chart. The actual endpoint will be populated once the resources are deployed and the load balancer obtains an IP or hostname.

**Important**: This Pulumi script does not include cloud provider configuration and assumes that the `kubeconfig` to interact with the OKE cluster is already set up on your machine. To make this Pulumi script work, ensure that your Pulumi environment can access your cloud provider's resources and the Kubernetes cluster.

To run this Pulumi program, you would execute `pulumi up` in your terminal. Pulumi should already be installed and configured with access to your Oracle Cloud account.

Remember that this is a templated approach and details like the Helm chart's version, values, and namespace might need to be adjusted to match your requirements and environments. You can usually find these details in the documentation accompanying the Helm chart you are trying to deploy.

Please replace the placeholder values with actual values you wish to use. Directly copying and pasting this code without modifications may not work because it depends on your specific environment and the configurations you want for your Keystone application.