Deploy the springboot helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy a Spring Boot Helm chart on OpenShift with Pulumi, we'll use the `kubernetes.helm.v3.Chart` resource from the Pulumi Kubernetes provider. The `Chart` resource is designed to work with Helm charts and can be used to deploy applications on any Kubernetes cluster, including OpenShift.

Below is a TypeScript program that uses Pulumi to deploy a Spring Boot application onto an OpenShift cluster using a Helm chart. To use this code, you must have Pulumi installed, have access to an OpenShift cluster, and have your `kubeconfig` file pointed to the cluster. You should also have Helm installed if you want to manage or inspect Helm releases directly.

Pulumi works by declaring the desired state of your infrastructure and then making it so. In this case, we declare that we want a Helm chart deployed, and Pulumi ensures that the chart is installed on our cluster.

Here's what the program does:

1. It imports the necessary Pulumi and Kubernetes packages.
2. It creates a `Chart` resource that references the Spring Boot Helm chart from a Helm repository. We pass necessary configurations such as `repo`, `chart`, `version`, and any custom `values` required to configure the Spring Boot application.
3. It ensures that the Helm chart is deployed to the OpenShift cluster your `kubeconfig` is pointing to.

Let's write the detailed Pulumi program:

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

// Replace the following with the correct values for your specific case
const openShiftKubeconfig = `...`; // You must provide the kubeconfig for your OpenShift cluster.
const projectName = 'springboot-demo'; // The name of the namespace/project in OpenShift.
const chartRepoUrl = 'https://repo-url/'; // The URL of the Helm repo where the Spring Boot chart is located.
const helmChartName = 'springboot'; // The name of the Helm chart for Spring Boot.
const helmChartVersion = 'x.y.z'; // Specify the version of the chart you wish to deploy.

// Initialize a Kubernetes Provider with the OpenShift kubeconfig.
const openshiftProvider = new k8s.Provider('openshift-k8s', {
    kubeconfig: openShiftKubeconfig,
});

// Create a Kubernetes Namespace/Project for our application if it doesn't already exist.
const project = new k8s.core.v1.Namespace(projectName, {
    metadata: {
        name: projectName,
    },
}, { provider: openshiftProvider });

// Deploy the Spring Boot helm chart into the OpenShift cluster under the created project.
const springBootApplication = new k8s.helm.v3.Chart('springboot-chart', {
    metadata: {
        namespace: project.metadata.name,
    },
    chart: helmChartName,
    version: helmChartVersion,
    fetchOpts: {
        repo: chartRepoUrl,
    },
    // Add any custom value overrides for the chart below, if necessary.
    values: {},
}, { provider: openshiftProvider });

// Exports a resource attribute that can be easily accessed from the stack.
export const springBootAppChartName = springBootApplication.metadata.name;

```

Before running this program with Pulumi, replace `openShiftKubeconfig`, `projectName`, `chartRepoUrl`, `helmChartName`, and `helmChartVersion` with the actual values required for your scenario.

**What the code does:**

1. We import the Kubernetes package from Pulumi.
2. We declare a Kubernetes provider for OpenShift by providing the `kubeconfig`.
3. We create a new Kubernetes namespace/project representing the isolated environment where the Spring Boot application will reside.
4. We define a new Helm chart resource which Pulumi will use to install the Spring Boot chart from the specified Helm repository into the namespace we created.
5. We export the chart name for use outside of Pulumi if needed.

Remember to install the `@pulumi/kubernetes` npm package before running this program:

```bash
npm install @pulumi/kubernetes
```

Once the program is set up, run it using the Pulumi CLI:

```bash
pulumi up
```

This will prompt you for confirmation before applying the changes. If everything is configured correctly, it will deploy the Spring Boot application as you have specified.

Keep in mind that this code snippet assumes you have an existing OpenShift cluster and you've configured Pulumi to interact with it. If you are new to Pulumi, you might want to follow the [Getting Started with Kubernetes](https://www.pulumi.com/docs/get-started/kubernetes/) guide and the [Pulumi Kubernetes API Documentation](https://www.pulumi.com/registry/packages/kubernetes/api-docs/) for more detailed instructions and examples.