Deploy the enterprise-database helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy an enterprise-database Helm chart to a Kubernetes cluster using Pulumi, you first need to ensure that you have a Kubernetes cluster running and that you have configured kubectl to interact with the cluster. Once that's in place, you can use the @pulumi/kubernetes package, which provides you with a set of APIs to manage Kubernetes resources including deploying Helm charts.

In the following program, I'll walk you through deploying a Helm chart in TypeScript using Pulumi's Kubernetes provider.

First, you should install the necessary Pulumi package for Kubernetes in your project:

$ npm install @pulumi/kubernetes

Now, let's dive into the Pulumi program:

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

// Assuming you have a Kubernetes cluster already provisioned and kubectl configured
// to point to your cluster, we can now start deploying the enterprise-database helm chart.

// Create an instance of the Chart resource. Helm charts can greatly simplify the process of deploying 
// and managing applications on Kubernetes. They package up all the needed resources into a single unit
// that can be easily deployed.

const enterpriseDatabaseChart = new k8s.helm.v3.Chart("enterprise-database", {
    // Replace `<YOUR-CHART-REPO>` with the Helm chart repository URL where the enterprise-database chart is located,
    // and replace `<CHART-NAME>` with the name of the Helm chart as defined in the repository.
    repo: "<YOUR-CHART-REPO>",
    chart: "<CHART-NAME>",
    // The `version` field allows you to pin the chart to a specific version.
    // Replace `<CHART-VERSION>` with the version of the enterprise-database chart you want to deploy.
    version: "<CHART-VERSION>",
    // Values allow you to provide configuration to the Helm chart. These values will configure the enterprise-database.
    // For example, you might want to set a specific database password, resource requests and limits, or persistence settings.
    // Consult the enterprise-database Helm chart's documentation for the configurable values.
    values: {
        // Example configuration. Replace these with actual configuration values.
        password: "your-database-password",
        resources: {
            requests: {
                cpu: "100m",
                memory: "256Mi",
            },
            limits: {
                cpu: "200m",
                memory: "512Mi",
            },
        },
    },
    // Optionally, specify the Kubernetes namespace to deploy into; otherwise, the default namespace is used.
    namespace: "default",
}, {
    // Pulumi transforms can be used to modify the resulting Kubernetes resources dynamically
    // before they are applied to the cluster. For example, you might want to add additional labels
    // or annotations that aren't part of the Helm chart itself.
    transformations: [
        // Example transformation that adds a custom label to all resources created by the Helm chart.
        (resource) => {
            if (resource.metadata) {
                resource.metadata.labels = { ...resource.metadata.labels, "managed-by": "pulumi" };
            }
        },
    ],
});

// Export the base URL for the database cluster, this would typically be a LoadBalancer or ClusterIP
// that can be used to access your 'enterprise-database'. The exact way to fetch this information
// depends on how the Helm chart exposes the service.
export const databaseUrl = enterpriseDatabaseChart.getResourceProperty(
    "v1/Service", "enterprise-database-service", "status"
).apply(status => status.loadBalancer.ingress[0].hostname || status.loadBalancer.ingress[0].ip);

In the above Pulumi program:

We create a new Helm chart instance using @pulumi/kubernetes library.
We specify the repository where the Helm chart is located, the name of the chart, and the version we want to deploy.
We provide configuration values for the chart using the values field. These values configure the database to your requirements, and the actual keys and values you'll need will depend on the specific Helm chart you're using.
We specify the namespace for the Helm chart. If not specified, the default namespace is used.
We use a transformation to add a label to all the Kubernetes resources created by the Helm chart to make it clear that they are managed by Pulumi.
We export a databaseUrl, which fetches the address of the Service created by the Helm chart. This address can be used to access the database. This assumes that the Helm chart creates a service named enterprise-database-service. If the service has a different name, you'll need to adjust the code accordingly.

Remember, the specific values you provide to customize the Helm chart will depend on the chart itself. You'll need to consult the documentation for your enterprise-database Helm chart to identify how to configure it correctly with the appropriate values, like passwords, storage options, etc.