Using kubernetes kustomize with app.redislabs.com

Question

Pulumi · Accepted Answer

To deploy an application on Kubernetes that utilizes Redis from app.redislabs.com, you can follow these steps using Pulumi with Kubernetes and Kustomize. Kustomize is a tool for customizing Kubernetes configurations. With Pulumi, you can apply Kustomize overlays, which would help you to patch or configure your Kubernetes resources for different environments or configurations.

Assuming you have a set of Kubernetes manifests or an application that you want to deploy, and you want to integrate Redis as a cache or a datastore, you will need to use Kustomize to create an overlay that patches in the connection details for Redis from app.redislabs.com.

Here's a step-by-step Pulumi TypeScript program that demonstrates how you could do this:

1. Install your Redis database instance on app.redislabs.com and acquire the necessary connection strings and credentials.
2. Create a Kustomize configuration directory that includes your Kubernetes resources and a Kustomize overlay for integrating Redis.
3. Use Pulumi's `kubernetes.kustomize.Directory` resource to apply your Kustomize configuration.

Note: Ensure you have the required directory with the `kustomization.yaml` and other manifests ready. This example assumes the directory and kustomization configuration exists.

Below is the Pulumi TypeScript program:

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

// Create a resource using the `kubernetes.kustomize.Directory` resource type which will apply
// a Kustomize configuration to your Kubernetes cluster. This allows the integration of the Redis
// configurations into the manifests.
const app = new k8s.kustomize.Directory("redis-app", {
    // Provide the path to the directory where your `kustomization.yaml` and other Kubernetes
    // manifests are located. This should include the overlay configurations for Redis.
    directory: "./path/to/kustomization",
});

// Export any important information, like the application URL, if applicable.
export const appName = app.getResource("v1/Service", "app-service-name").metadata.name;
```

In the code above, replace `./path/to/kustomization` with the path to your Kustomize configuration directory, and `app-service-name` with the name of your application's service if you want to export its details.

The `kubernetes.kustomize.Directory` resource kind allows Pulumi to work with Kustomize directly. It'll look for a `kustomization.yaml` file in the specified directory and apply the manifests with the transformations defined in Kustomize.

For more details on the `kubernetes.kustomize.Directory` resource, you can refer to the [Pulumi documentation](https://www.pulumi.com/docs/reference/pkg/kubernetes/kustomize/directory/).

Before running this Pulumi program, make sure you have Pulumi installed and configured with access to your Kubernetes cluster. Once you have everything set up, you can run the following commands in your terminal:

```shell
pulumi up
```

This will start the deployment process. Pulumi will show you a preview of what Kubernetes resources will be created or updated. If everything looks good, you can confirm the deployment, and Pulumi will apply the Kustomize configuration to your cluster.

Remember, you will need to handle secrets and sensitive information properly, possibly using Kubernetes secrets or Pulumi's secret handling capabilities, to keep your Redis credentials secure.