1. Deploy the horovod helm chart on Opensshift

    TypeScript

    To deploy the Horovod Helm Chart on an OpenShift cluster using Pulumi, we'll use the kubernetes.helm.v3.Chart resource from the Pulumi Kubernetes provider. This resource allows us to deploy Helm charts to a Kubernetes cluster. Since OpenShift is a Kubernetes distribution, we can use the standard Kubernetes resources provided by Pulumi to interact with it.

    Before you begin, you need to ensure that you have the following prerequisites:

    1. An OpenShift cluster where you have permissions to deploy applications.
    2. kubectl configured to interact with your OpenShift cluster.
    3. Helm CLI installed on your system if you need to manually inspect or modify chart values.
    4. Pulumi CLI installed on your system.
    5. Node.js and NPM installed to run the TypeScript program.

    Below is a TypeScript program using Pulumi to deploy the Horovod Helm Chart on an OpenShift cluster:

    import * as k8s from "@pulumi/kubernetes"; // Define the Helm Chart version and repository URL if it's a custom or third-party chart. // Otherwise, you can find Horovod Helm Chart information from its official repository. const horovodChartVersion = "x.y.z"; // Replace with the actual chart version const horovodChartRepo = "https://..."; // Replace with the actual Helm repository URL // Define the Helm Release name and the namespace where it will be deployed. const releaseName = "horovod-release"; const namespaceName = "horovod-namespace"; // Create a Kubernetes Namespace where the Helm Chart will be deployed. const ns = new k8s.core.v1.Namespace(namespaceName, { metadata: { name: namespaceName }, }); // Deploy the Horovod Helm Chart to the OpenShift cluster. const horovodChart = new k8s.helm.v3.Chart(releaseName, { chart: "horovod", version: horovodChartVersion, namespace: namespaceName, fetchOpts: { repo: horovodChartRepo, }, // If needed, provide custom values to the Helm Chart. // values: { // image: { // repository: "custom-repo/horovod", // tag: "custom-tag", // }, // // Other custom values... // }, }, { dependsOn: ns }); // Export the URL to access deployed services if applicable. export const servicesUrl = horovodChart.getResource("v1/Service", `${namespaceName}/service-name`) .status.loadBalancer.ingress[0].hostname;

    Here's what each part of the program does:

    • We import the @pulumi/kubernetes package, enabling us to use Kubernetes resources, including Helm.
    • We define the version and repository of the Horovod Helm Chart. These details will depend on where the Helm chart is hosted and its version.
    • We create a new namespace for the Horovod deployment using the k8s.core.v1.Namespace class.
    • With k8s.helm.v3.Chart, we deploy the Helm chart to the cluster. We pass the chart name, version, namespace, and optionally custom values if you want to override the defaults.
    • We include a dependsOn option to ensure the namespace is created before deploying the Helm Chart.
    • We export the service URL to provide easy access to the endpoints exposed by the Helm chart's resources. You will need to replace service-name with the actual service name created by the Horovod Helm Chart.

    Remember, you will need to replace the horovodChartVersion, horovodChartRepo, and any custom values with information specific to the Horovod Helm Chart you are using.

    To run this program:

    1. Save this code to a file with a .ts extension, for example, deployHorovod.ts.
    2. Initialize a new Pulumi project in the same directory if you haven't already (pulumi new kubernetes-typescript).
    3. Install the Pulumi Kubernetes package by running npm install @pulumi/kubernetes.
    4. Run pulumi up to preview and apply the changes to your OpenShift cluster.

    After the deployment, Pulumi will provide outputs that include the service URL where you can access the deployed services. This assumes that the services deployed by the Helm chart are of LoadBalancer type and the cluster supports load balancers with externally accessible IPs or hostnames. If your OpenShift environment doesn't provide this, you'll need to adapt the service URL accordingly.


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