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

Question

Pulumi · Accepted Answer

To deploy the Gnocchi Helm chart on Oracle Kubernetes Engine (OKE), we'll undertake several steps:

Set up an OKE Cluster: Before deploying any applications, we need a Kubernetes cluster. Oracle provides the oci.ContainerEngine.Cluster resource for creating an OKE cluster.
Prepare Helm Chart Deployment: For deploying Helm charts in a Pulumi program, we use the kubernetes.helm.v3.Chart or kubernetes.helm.v3.Release resource from the Pulumi Kubernetes provider, which manages Helm charts in a manner consistent with kubectl.

Here is a detailed explanation of the program:

We begin by importing required modules for OCI and Kubernetes.
We create an OKE cluster using the oci.ContainerEngine.Cluster resource.
Once we have the cluster, we configure the Kubernetes provider to point at the newly-created OKE cluster.
We then use the kubernetes.helm.v3.Chart resource to install Gnocchi from its Helm chart. Helm charts define, install, and upgrade even the most complex Kubernetes applications.

Let's start with the Pulumi TypeScript program:

import * as pulumi from '@pulumi/pulumi';
import * as oci from '@pulumi/oci';
import * as k8s from '@pulumi/kubernetes';

// Create an OCI Kubernetes cluster (OKE)
const cluster = new oci.ContainerEngine.Cluster("myCluster", {
    // Specify necessary properties for the OKE cluster
    // like compartmentId, VCN configuration, Kubernetes version, etc.
    // Be sure this information is pre-configured or available in your environment.
});

// Once the cluster is created, we need to configure the Kubernetes provider
// to point to the OKE cluster. Typically, this involves fetching the
// kubeconfig file for the cluster from OCI, which includes the cluster endpoint
// and authentication details necessary for kubectl to communicate with the cluster.

// Assuming kubeconfig is obtained and available (details depend on your specific setup)
const k8sProvider = new k8s.Provider("myK8sProvider", {
    kubeconfig: "<KUBECONFIG_CONTENT>",
    // Ensure you replace <KUBECONFIG_CONTENT> with actual kubeconfig content
});

// Deploy a Helm chart for Gnocchi
const gnocchiChart = new k8s.helm.v3.Chart("gnocchi", {
    chart: "gnocchi",
    // Replace with correct repository and chart properties as required.
    // For example, repo: 'https://kubernetes-charts.storage.googleapis.com/'
    // Ensure you have added the helm repository beforehand using `helm repo add`
    values: {
        // Provide any specific configuration for the chart if necessary.
    },
}, { provider: k8sProvider });

// Export the cluster name and kubeconfig
export const clusterName = cluster.name;
export const kubeconfig = k8sProvider.kubeconfig;

Here is a step-by-step explanation of the components of the program above:

The oci.ContainerEngine.Cluster resource creates a new OKE cluster, with properties such as compartmentId specifying the compartment under which to create the cluster, and additional properties such as VCN configurations, Kubernetes version, and other cluster settings.
Since we require the kubeconfig to interact with the cluster, we use it to configure the Pulumi Kubernetes provider. It's important to replace <KUBECONFIG_CONTENT> with actual content from your kubeconfig file.
The k8s.helm.v3.Chart resource allows you to deploy the Gnocchi Helm chart using its name, repo URL, and any custom values you wish to provide. Be sure to specify the correct chart name and repository URL.
Finally, we export the cluster's name and kubeconfig file for easy access. These can be used to interact with the Kubernetes cluster using kubectl or other Kubernetes tools.

This program should be treated as a starting framework. Real-world usage will require specific values for parameters like compartmentId, proper handling of authentication credentials, and management of the kubeconfig file for the Kubernetes provider.

When running this code, ensure that you’ve set up your OCI credentials correctly and have the rights to create resources in the desired compartment. The Pulumi stack should be adapted as needed to fit into your organization's deployment requirements.