Deploy the rabbitmq-ha helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy the `rabbitmq-ha` Helm chart on OpenShift using Pulumi, you would use the `Chart` resource from the `@pulumi/kubernetes` package. This allows you to deploy Helm charts to a Kubernetes cluster from Pulumi with ease. OpenShift is a distribution of Kubernetes, so the `@pulumi/kubernetes` package should work just as well with OpenShift assuming you have the right configuration and permissions in place.

In this program, we will:

1. Import the necessary Pulumi and Kubernetes packages.
2. Instantiate a `Chart` resource representing the `rabbitmq-ha` Helm chart.
3. Pass the required parameters to the `Chart` resource such as the chart name, version (if needed), any values that you want to override etc.
4. Export any necessary resulting resource properties, such as the deployed service endpoint.

Below is the TypeScript program to deploy the `rabbitmq-ha` Helm chart on OpenShift:

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

// Create an instance of the k8s provider for OpenShift.
// The provider uses the existing configuration of kubectl by default.
const openshiftProvider = new k8s.Provider("openshift", {
    // Assuming `kubectl` is already configured to interact with your OpenShift cluster.
    // You could also specify kubeconfig explicitly if needed.
});

// Deploy the rabbitmq-ha helm chart.
// The repo 'stable' should have the 'rabbitmq-ha' chart. If it's in another repo, specify that with the `repo` parameter.
const rabbitmqHaChart = new k8s.helm.v3.Chart("rabbitmq-ha", {
    chart: "rabbitmq-ha",
    // You can specify the version of the chart you want to deploy like this:
    // version: "<version_number>",
    // If you have custom values you want to override, specify them here.
    // For example, to override the replicaCount you would do something like:
    values: {
        replicaCount: 3,
        // Add other values you need to override here
    },
    // You might want to install it into a specific namespace.
    namespace: "my-namespace",
}, { provider: openshiftProvider });

// Export the endpoint of the RabbitMQ instance.
// This fetches the service created by the Helm chart and exports its endpoint.
const rabbitmqService = rabbitmqHaChart.getResource('v1/Service', "my-namespace", "rabbitmq-ha");
export const rabbitmqEndpoint = rabbitmqService.status.apply(status => status.loadBalancer.ingress[0].ip);

```

Explanation:
- We import the `@pulumi/pulumi` and `@pulumi/kubernetes` packages to interact with Pulumi and Kubernetes/OpenShift resources.
- We establish a provider to interact with your OpenShift cluster. You can omit the kubeconfig if your `kubectl` is already set up for the OpenShift cluster.
- We create a new `Chart` resource, which will install the `rabbitmq-ha` Helm chart. We pass in a set of values that will override the defaults set by the chart if necessary.
- Finally, we attempt to export the endpoint of the RabbitMQ service, assuming it was created with a LoadBalancer type. If the service type is different, or if you need to access different properties, you will need to adjust the `rabbitmqEndpoint` calculation accordingly.

Note that this program assumes there is a `rabbitmq-ha` chart available in the Helm repository. If your Helm chart is in a different repository or requires additional configuration, you'll need to update the `Chart` resource instantiation appropriately.

Please ensure you've set up your Pulumi and OpenShift configurations correctly. You can refer to the Pulumi [Getting Started with Kubernetes](https://www.pulumi.com/docs/get-started/kubernetes/) guide and the OpenShift documentation for detailed instructions on how to configure access to your cluster.