Deploy the ignite helm chart on Opensshift

Question

Pulumi · Accepted Answer

Deploying a Helm chart on an OpenShift cluster requires you to first set up the necessary infrastructure where the OpenShift cluster resides and then install the Helm chart into that cluster. Pulumi's `kubernetes` package supports managing Helm charts within a Kubernetes cluster, including an OpenShift cluster because OpenShift is a distribution of Kubernetes with additional features.

Before you begin, make sure you have the following prerequisites in place:
1. Pulumi CLI installed and configured with an appropriate Pulumi account.
2. Access to an OpenShift cluster and the `kubeconfig` file that allows you to connect to the cluster.
3. Helm chart details such as the chart name, version, repository (if it's not a local chart), and any specific values you want to override in the default chart configuration.

The Pulumi program below showcases how to deploy the Apache Ignite Helm chart to an OpenShift cluster. Apache Ignite is a distributed database, caching, and processing platform designed to store and compute on large volumes of data across a cluster of nodes.

Here's a step-by-step description along with the Pulumi program in TypeScript:

1. **Setting up the OpenShift provider**: We first need to ensure that our program can communicate with the OpenShift cluster. We use the Pulumi Kubernetes provider which can communicate with any Kubernetes-compatible cluster, including OpenShift. The provider uses the `kubeconfig` file to establish a connection with the cluster.

2. **Creating a Helm chart resource**: In the program, we create an instance of `Chart` from the `@pulumi/kubernetes/helm/v3` module. We specify the chart name (`ignite` for Apache Ignite), set the repository where the chart is hosted and provide configuration parameters through the `values` property. These parameters allow you to customize the deployment, and might include settings specific to Apache Ignite, like the number of nodes to deploy.

3. **Deploying the Helm chart**: When the Pulumi program is run using `pulumi up`, it will initiate the deployment of the specified Helm chart onto the OpenShift cluster. Pulumi will then report the status and any resources created during this deployment process.

Now, let's take a look at the Pulumi TypeScript program to accomplish this:

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

// Replace the following variables with the appropriate values for your setup.
const kubeconfig = `...`; // Your OpenShift cluster's kubeconfig content
const igniteChartName = "ignite";
const igniteChartVersion = "YOUR_CHART_VERSION"; // Use the specific version
const igniteChartRepo = "https://YOUR_HELM_CHART_REPO/"; // Ignite Helm chart repository
const igniteReleaseName = "ignite-release";

// Initialize the Kubernetes provider with your OpenShift cluster kubeconfig.
const provider = new k8s.Provider("openshift-provider", {
    kubeconfig: kubeconfig
});

// Deploy the Apache Ignite Helm chart to the OpenShift cluster.
const igniteChart = new k8s.helm.v3.Chart(igniteReleaseName, {
    chart: igniteChartName,
    version: igniteChartVersion,
    fetchOpts: {
        repo: igniteChartRepo,
    },
    // You can specify further custom values for the Helm chart or leave empty to use defaults.
    values: {
        // Define any custom value overrides for the chart here.
        // e.g. persistence: { enabled: true }, nodes: 3, etc.
    },
}, { provider });

// Export the URL to access Ignite dashboard if applicable.
export const igniteDashboardUrl = "http://..."; // Provide the URL to access Ignite dashboard.
```

In this program, make sure to replace placeholders like `YOUR_CHART_VERSION`, `YOUR_HELM_CHART_REPO`, and the `kubeconfig` with actual values corresponding to your setup.

Please replace the `igniteDashboardUrl` export with the correct URL to access Apache Ignite's dashboard or any other relevant service endpoint. This URL will depend on your OpenShift cluster's configuration, like ingress controllers, routes, and the service endpoints exposed by the Ignite Helm chart.

After crafting this program, you will run it using the Pulumi CLI to deploy your Helm chart into the OpenShift cluster. Pulumi will provide detailed status information as it carries out the deployment. Upon successful deployment, you may access your Apache Ignite cluster via the exported URL or through your OpenShift cluster's dashboard.