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

Question

Pulumi · Accepted Answer

To deploy the FHIR (Fast Healthcare Interoperability Resources) Helm chart on Oracle Kubernetes Engine (OKE), we'll use Pulumi with the Kubernetes and OCI (Oracle Cloud Infrastructure) providers. The process involves these steps:

1. Set up an OCI provider instance to interact with the Oracle Cloud resources.
2. Create or use an existing OKE cluster where the Helm chart will be deployed.
3. Use the Helm chart resource in Pulumi to deploy FHIR onto the OKE cluster.

Below is a Pulumi program written in TypeScript that performs these steps. Keep in mind that you need to have Pulumi CLI installed, as well as have your Oracle Cloud Infrastructure configured for Pulumi to interact with it (setting up the necessary credentials and configurations).

Firstly, we instantiate the `oci.ContainerEngine.Cluster` resource to represent the OKE cluster we want to deploy our Helm chart to. We also set up the Kubernetes provider to interact with this cluster.

Next, we deploy the FHIR Helm chart using the `kubernetes.helm.v3.Chart` resource. This is a Pulumi resource that represents a Helm chart in a Kubernetes cluster.

Make sure to replace the placeholders in the code with the actual values required for your deployment, such as the Helm chart name, version, and values.

Here is the Pulumi program:

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

// Replace these variables with your own details
const compartmentId = 'your-compartment-id';
const vcnId = 'your-vcn-id';
const kubeconfigPath = 'path-to-your-kubeconfig';

// Create an OCI Kubernetes cluster (OKE)
const cluster = new oci.containerengine.Cluster("my-cluster", {
    compartmentId: compartmentId,
    vcnId: vcnId,
    kubernetesVersion: "v1.20.8", // Specify the desired Kubernetes version
    options: {
        serviceLbSubnetIds: [
            "your-public-subnet-1-id",
            "your-public-subnet-2-id",
        ],
        // Additional options can be configured as per requirement
    },
});

// Set up the Kubernetes provider to deploy the Helm chart
const k8sProvider = new kubernetes.Provider("my-k8s-provider", {
    kubeconfig: pulumi.output(cluster.kubeconfigContent).apply(content => content),
});

// Deploy the FHIR Helm chart
const fhirChart = new kubernetes.helm.v3.Chart("fhir", {
    chart: "fhir-server",
    version: "0.1.0", // Specify the Helm chart version you'd like to deploy
    fetchOpts: {
        repo: "https://charts.yourchartrepo.com/", // Replace with the repository where your Helm chart is located
    },
    values: {
        // Provide any values that you want to override in the Helm chart
    },
}, { provider: k8sProvider });

// Export the cluster's name and kubeconfig
export const clusterName = cluster.name;
export const kubeconfig = cluster.kubeconfigContent;
```

In the above code:

- We create the OKE cluster using the `oci.containerengine.Cluster` resource. You must provide your compartment ID and VCN ID for Oracle Cloud.
- The `kubernetes.Provider` object utilizes the kubeconfig obtained from the newly created cluster. This config enables Pulumi to interact with your cluster.
- We then define a new Helm chart resource, `fhirChart`, specifying the chart name (`fhir-server`) and the chart version. You should replace the `repo` with the actual Helm repository where your FHIR chart is hosted.
- Lastly, we export the name of the cluster and the kubeconfig, which you can use to interact with the cluster outside of Pulumi.

To run your Pulumi program, you'll need to execute the following commands in your terminal:
- `pulumi up` - to preview and deploy the changes described by the program.

Remember, you'll also need to have configured access to your Oracle Cloud Infrastructure account and set up the necessary permissions for Pulumi to create and manage resources in your OKE cluster.