Deploy the openstack helm chart on Kubernetes

Question

Pulumi · Accepted Answer

Deploying an OpenStack Helm chart on Kubernetes with Pulumi involves writing a program that uses Pulumi's Kubernetes provider to manage the deployment. The `pulumi/kubernetes` package provides a `Chart` resource that represents a Helm chart which can be used to deploy OpenStack.

The `Chart` resource allows you to specify the Helm chart you want to deploy, the values to customize it (if necessary), the namespace, and other settings. In the following program, we will use the `Chart` resource to deploy the OpenStack Helm chart. Note that the actual chart and values will depend on the specific OpenStack Helm chart you are using, which you should define according to your needs.

Before running the Pulumi program, you need to set up Helm locally and add the appropriate chart repositories that contain the OpenStack Helm charts.

Here's what the Pulumi TypeScript program would look like:

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

// Name of the OpenStack Helm chart.
const openStackChartName = "openstack"; // Make sure you use the correct chart name
// Repository where the OpenStack Helm chart is hosted.
const openStackChartRepo = "https://openstack-helm-charts.storage.googleapis.com"; // Use the appropriate Helm chart repository

// Create a new Kubernetes namespace for OpenStack
const openStackNamespace = new k8s.core.v1.Namespace("openstack", {
    metadata: { name: "openstack" }
});

// Deploy OpenStack using the Helm chart.
// You can customize the Helm chart installation by specifying different value options.
const openStackChart = new k8s.helm.v3.Chart("openstack", {
    chart: openStackChartName,
    version: "0.1.0", // Specify the chart version you want to deploy
    namespace: openStackNamespace.metadata.name,
    fetchOpts: {
        repo: openStackChartRepo,
    },
    values: {
        // Define any specific configuration needed for the OpenStack deployment
        // Example configuration (this will vary based on your needs):
        // cinder: { enable: true },
        // nova: { enable: true },
        // The above is just illustrative; you'll need to consult the chart's documentation for actual values.
    }
});

// Export the namespace in which OpenStack was deployed
export const openStackNamespaceName = openStackNamespace.metadata.name;
```

In this program:

- We import the necessary Kubernetes classes from the Pulumi library.
- We define constants for the OpenStack Helm chart name and repository URL. You should replace the placeholder values with the actual chart name and repository if they are different.
- We create a Kubernetes Namespace keyed by 'openstack'. Namespaces allow you to partition your Kubernetes cluster into sub-clusters. This is useful if you have different environments or projects sharing the same Kubernetes cluster and wish to keep their resources separate.
- We then declare a Helm chart resource, specifying the chart's name, version, and values. The `values` object is a set of overrides that you can specify to customize the behavior of the Helm chart.
- The `fetchOpts` property tells Pulumi where to fetch the chart from by specifying the repository URL.
- Finally, we export the name of the created namespace as an output of our Pulumi program.

Please replace `"0.1.0"` with the specific version of your OpenStack Helm chart and modify the `values:` field to match the custom configuration required for your OpenStack Helm deployment. The `values` object keys and structure must match what is expected by the specific OpenStack Helm chart you're using. You should consult the documentation for your chosen chart to understand the available configuration options.

To use this program:

1. Ensure that you have Pulumi installed and configured to connect to your Kubernetes cluster.
2. Save the above code to a file, for example `index.ts`.
3. Run `pulumi up` to preview and deploy these resources to your cluster.

This will start the deployment process, during which Pulumi will communicate with your Kubernetes cluster and create the specified resources in the right order.

Remember to review the Helm chart documentation for your chosen OpenStack deployment, as you might need to provide necessary configurations or fulfill prerequisites for the OpenStack services you intend to use.