Deploy the python-fastapi-postgres helm chart on Kubernetes

Question

Pulumi · Accepted Answer

Deploying a Helm chart with Pulumi involves creating a `Chart` resource from the `@pulumi/kubernetes` package. The `Chart` resource is a high-level component that deploys a Helm chart from a chart repository into a Kubernetes cluster.

Here's a step-by-step guide on how to deploy the `python-fastapi-postgres` Helm chart onto Kubernetes using Pulumi and TypeScript:

1. **Set up your Kubernetes cluster**: Before running the Pulumi program, ensure you have a Kubernetes cluster up and running. You should configure your `kubectl` to point to your cluster so that Pulumi can interact with it.

2. **Import Pulumi Kubernetes Package**: We make use of the `@pulumi/kubernetes` npm package to interact with Kubernetes resources. If you haven’t already installed this package, you will need to run `npm install @pulumi/kubernetes`.

3. **Create the Helm Chart resource**: Instantiate a `Chart` resource from the `@pulumi/kubernetes/helm/v3` module within your Pulumi program. You'll need to provide a chart name, the repository where the chart can be found (if it's not a part of the stable repository), and any configurations the chart allows.

4. **Execute the Pulumi Program**: Run `pulumi up` to deploy your resources to the Kubernetes cluster. Pulumi will communicate with the cluster the current `kubectl` config is pointing to and stand up the resources defined in the program.

Below is a Pulumi TypeScript program that deploys the `python-fastapi-postgres` chart:

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

// Pulumi will use the current context from your kubeconfig file.
// Ensure that you are connected to the correct Kubernetes cluster.

// Deploy the Helm chart for python-fastapi-postgres
const chart = new k8s.helm.v3.Chart("python-fastapi-postgres", {
    // Replace with your Python FastAPI Postgres chart details
    chart: "python-fastapi-postgres",
    version: "1.0.0", // Replace with the chart version you wish to deploy
    // If the chart is not from the stable repository, specify the repository.
    // For example: repo: "http://my-charts.com/",
    // If required, specify the namespace, values, and other configurations specific to the chart.
    // Example:
    // namespace: "production",
    // values: {
    //   key: "value",
    // },
});

// Export the base URL for the Python FastAPI application
export const appUrl = chart.getResourceProperty("v1/Service", "python-fastapi-postgres-python-fastapi", "status").apply(status => status.loadBalancer.ingress[0].hostname || status.loadBalancer.ingress[0].ip);
```

Please note that `chart`, `version`, `repo`, and `values` may need updating to match the exact chart you intend to deploy. Also, replace the calls to `getResourceProperty` with the appropriate resource type and names that match resources exposed by the `python-fastapi-postgres` chart.

When you're ready, run the following command to deploy the chart:

```bash
pulumi up
```

Review the proposed changes and select "yes" to perform the update if everything looks correct.

Once the deployment is complete, the Pulumi stack output will include the base URL for the Python FastAPI application. You can access your application by navigating to this URL in a web browser.

I hope this helps you understand the process of deploying a Helm chart to Kubernetes with Pulumi in TypeScript. If you have any questions or need further assistance, feel free to ask.