Deploy the ravendb-cluster helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy the RavenDB cluster using a Helm chart on a Kubernetes cluster with Pulumi, you would write a program using TypeScript and the Pulumi Kubernetes provider. This provider allows you to declare Kubernetes resources using Pulumi in a programmatic way.

Here's how you can use Pulumi to deploy a Helm chart:

Import the necessary Pulumi and Kubernetes libraries.
Create a new Kubernetes Helm Chart resource.
Specify the chart name, version, and any custom values you want to apply.

First, you will need to set up your Pulumi environment and authenticate with your Kubernetes cluster. Make sure that you have Pulumi installed and configured, and that your Kubernetes kubectl is configured to connect to your cluster.

Below is a complete program in TypeScript that deploys the RavenDB cluster Helm chart:

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

// A Helm chart is a collection of pre-configured Kubernetes resources.
// The `k8s.helm.v3.Chart` class allows us to deploy such charts within a Pulumi program.
// Here we're deploying the "ravendb-cluster" chart.
const ravendbClusterChart = new k8s.helm.v3.Chart('ravendb-cluster', {
    // Replace "<CHART-REPO>" with the Helm chart repository where "ravendb-cluster" is located.
    // Replace "<CHART-VERSION>" with the version of the chart you wish to deploy.
    chart: 'ravendb-cluster',
    version: '<CHART-VERSION>',
    fetchOpts: {
        repo: '<CHART-REPO>',
    },
    // Specify the namespace where the chart will be installed.
    // If the namespace doesn't exist, it will be created by default.
    namespace: 'default', // You can choose a different namespace if you like.
    // Values allow you to provide custom configuration values for the Helm chart.
    // These values override the defaults provided by the Helm chart.
    values: {
        // Define any custom values you need for your RavenDB cluster.
        // Refer to the Helm chart's documentation for available options.
    },
}, {
    // Pulumi options.
    // These options can control aspects like the Kubernetes provider to use
    // if you have multiple clusters configured in your Pulumi stack.
    provider: k8sProvider, // Only necessary if you have a non-default provider.
});

// Export the base DNS name that is allocated to the RavenDB cluster.
// This depends on the actual output from the deployed Helm chart.
// Helm charts typically include useful outputs in their status,
// which can be accessed using Pulumi outputs.
export const ravendbClusterDns = ravendbClusterChart
    .getResourceProperty('v1/Service', 'ravendb-cluster', 'status')
    .apply(status => status.loadBalancer.ingress[0].hostname);

// Remember to replace `<CHART-REPO>` and `<CHART-VERSION>` with the relevant information
// for the RavenDB cluster chart you're deploying, and fill in the `values` object with
// any configuration options specific to your use case.

In the above code:

We import the Pulumi Kubernetes library to work with Kubernetes resources.
We use the k8s.helm.v3.Chart resource to deploy the Helm chart. This resource requires a chart name and can include a chart version and any repository where the chart is hosted.
We specify any custom values that should be used by the Helm chart under the values field. These values are specific to the Helm chart you're deploying and should be determined based on the configuration options available for that chart.
Finally, we export a DNS name for the RavenDB cluster; this is an example of how you might retrieve information about resources created by the Helm chart.

Please replace placeholders like <CHART-REPO> and <CHART-VERSION> with the actual chart repository URL and the version of the RavenDB chart you are deploying. The custom values that you need to set would depend on the specific configuration required for your RavenDB cluster, as defined in the chart's documentation.

Note that you will need a running Kubernetes cluster and have the Pulumi CLI installed and configured on your machine. You will also need to replace k8sProvider with an actual instance of a Kubernetes provider if you're not using the default one.

To run this code, you would save it to a file named index.ts, then execute pulumi up in the same directory as the file to provision the resources. Pulumi will show you a preview of the resources that will be created and prompt you for confirmation before proceeding with the deployment.