Deploy the springboot helm chart on Oracle Kubernetes Engine (OKE)

Question

Pulumi · Accepted Answer

To deploy the Spring Boot Helm chart on the Oracle Kubernetes Engine (OKE), we will use Pulumi to orchestrate the necessary cloud resources. The main steps to achieve this will include:

1. Setting up an OCI Kubernetes Cluster (using OKE).
2. Deploying the Helm Chart to the cluster.

I will guide you through the Pulumi program written in TypeScript that performs these tasks. Before we dig into the code, make sure you have the Pulumi CLI installed and you are logged in to the Pulumi service. Also, ensure that you have Oracle Cloud Infrastructure (OCI) CLI setup with appropriate credentials to manage resources in your Oracle Cloud account.

For this program, we'll need the `oci` and `kubernetes` Pulumi packages. The `Kubernetes` package provides resources for deploying and managing Kubernetes resources, including Helm charts. The `oci` package provides resources to manage Oracle Cloud Infrastructure services, and in this case, to provision an OKE cluster.

The following Pulumi program outlines the resources and steps needed:

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

// Create an OCI Kubernetes Cluster (OKE)
const cluster = new oci.containerengine.Cluster("okeCluster", {
    // ... specify the required properties for your OKE cluster
    // For example, 'name', 'compartmentId', 'vcnId', 'kubernetesVersion', etc.
});

// After the cluster is created, we need to configure Pulumi to use the generated kubeconfig
// The kubeconfig is often provided by OCI once the cluster is up and ready
const kubeconfig = cluster.kubeconfig; // this is a placeholder for how you'd get the kubeconfig

// Create a provider instance using the kubeconfig from the OKE cluster
const k8sProvider = new k8s.Provider("okeK8sProvider", {
    kubeconfig: kubeconfig,
});

// Deploy the Helm Chart to the cluster using the k8s.helm.v3.Chart resource
const springbootChart = new k8s.helm.v3.Chart("springboot", {
    chart: "spring-boot", // The name of the chart, replace with actual chart name if different
    // You can specify the repository if the chart is not in the default Helm chart repository
    // repo: "https://charts.example.com/",
    version: "1.0.0", // Replace with the desired version of the chart
    namespace: "default", // Specify the namespace (if other than 'default')
    // You can also supply additional configurations to the chart using 'values'
    // values: { ... },
}, { provider: k8sProvider });

// Export the cluster's Kubernetes API address
export const kubeApiAddress = cluster.endpoints.apply(e => e.kubernetesApi);

// After running `pulumi up`, this will print the API address of the Kubernetes cluster to the terminal
```

Make sure to replace the placeholder values in the Pulumi program with the actual values that pertain to your setup, such as the cluster name, compartment ID, VCN ID, and Kubernetes version. Also, ensure you specify the correct Spring Boot Helm chart name, repo URL, and version as needed.

In this program:

- We define an OKE Cluster resource, which will create a Kubernetes cluster in your specified compartment with the desired settings.
- We then fetch the kubeconfig for connecting to this cluster, which is typically available once the OKE cluster provisioning is complete.
- We set up the Kubernetes provider with the kubeconfig we obtained from the OKE cluster resource.
- We deploy the Spring Boot Helm chart to the Kubernetes cluster using the `Chart` resource, and we specify the Kubernetes provider to ensure it targets our newly created OKE cluster.
- Finally, we export the kubeApiAddress of the cluster for further reference or for potential integration with other systems or monitoring tools.

To run this program successfully:

1. Replace all placeholders with your specific values. This includes cluster configuration and Helm chart information.
2. Install the required Pulumi packages by running `npm install @pulumi/oci @pulumi/kubernetes`.
3. Run `pulumi up` to execute the program and provision the resources.

The program will create the necessary resources in Oracle Cloud infrastructure and deploy your Spring Boot application to it through the specified Helm chart.