Deploy the fusionauth helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy the FusionAuth Helm chart on Kubernetes using Pulumi, we will use the `kubernetes.helm.sh/v3.Chart` resource. This resource is responsible for deploying Helm charts into a Kubernetes cluster in a declarative way.

Before you begin, make sure you have:
- Pulumi CLI installed.
- Access to a Kubernetes cluster and the `kubeconfig` file is set up to interact with the cluster.
- Helm CLI installed (it is not required for deploying with Pulumi, but helpful for chart exploration and understanding).

The FusionAuth Helm chart simplifies the deployment of FusionAuth into a Kubernetes environment. A Helm chart is essentially a package containing pre-configured Kubernetes resources. It allows us to deploy complex applications with relative ease, as Helm charts come with sane defaults and configuration options.

Our Pulumi program will define an instance of `Chart`, specifying the FusionAuth chart. This object requires some values such as the chart name, the repository where the chart is stored, and any necessary values that are particular to the chart (like database configurations, service type, etc.).

Here's a basic Pulumi TypeScript program that deploys the FusionAuth Helm chart:

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

// Define the settings for the FusionAuth Helm chart.
const fusionAuthChart = new k8s.helm.v3.Chart("fusionauth", {
    repo: "fusionauth", // Make sure to add the FusionAuth repository to Helm locally with `helm repo add`
    chart: "fusionauth",
    version: "1.0.0", // Replace with the desired chart version
    values: {
        // Provide configuration values for the Helm chart here.
        // You can check the default values and structure expected by the FusionAuth chart.
        // For example:
        // database: {
        //   user: "my-database-user",
        //   password: "my-database-password",
        // },
        // nodeSelector: {},
        // replicaCount: 1,
    },
}, { provider: k8sProvider });

// Optionally, you can pass a custom kubeconfig context if needed.
// const k8sProvider = new k8s.Provider("k8s", {
//     kubeconfig: "your-kubeconfig-content",
// });

// Export the URL for the FusionAuth application (if applicable).
// This depends on how you've configured services and ingresses in your Helm values.
export const fusionAuthUrl = fusionAuthChart.getResourceProperty("v1/Service", "fusionauth", "status").apply(status => {
    const ingress = status.loadBalancer.ingress[0];
    if (ingress) {
        return ingress.ip || ingress.hostname;
    }
});
```

To execute this program:
1. Save the above code in a file named `index.ts` in a new directory.
2. Run `pulumi up` in the command line from that directory. Pulumi will provision the necessary resources as defined.

**Important Notes:**
- You must have Helm installed and have added the FusionAuth Helm chart repository to your local Helm CLI with the command `helm repo add`.
- The `version` property should be set to the desired version of the chart you wish to deploy. If unsure, use Helm CLI to search for the latest stable version.
- Inside the `values` property, you can specify any configurations that are required for FusionAuth to run as per your requirements. The properties of this object should match the ones provided by the FusionAuth Helm chart (which can be found by running `helm show values fusionauth/fusionauth`).
- The `getResourceProperty` is a generic method to retrieve status information of resources deployed by the chart. Depending on the actual Services and Ingress definitions in the FusionAuth Helm chart, the property names to access the URL may vary.
- Make sure your Pulumi Kubernetes provider is correctly set up to communicate with the cluster you want to deploy to. If not using the default context from your `kubeconfig`, you'll need to specify the kubeconfig for the appropriate Kubernetes cluster within the Pulumi program by creating an instance of `k8s.Provider`.

Remember to review the output of `pulumi up` to ensure that the deployment proceeds as expected. The resources being created, updated, or deleted will be listed before you confirm the deployment.