Deploy the neo4j-cluster-core helm chart on Kubernetes

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Pulumi · Accepted Answer

To deploy the `neo4j-cluster-core` Helm chart on Kubernetes using Pulumi, we will use Pulumi's Kubernetes provider. The Kubernetes provider is a package that allows us to interact with Kubernetes resources. We will be utilizing the `Chart` resource from the Kubernetes provider, which allows us to deploy Helm charts.

In the code below, I will demonstrate how to deploy the `neo4j-cluster-core` Helm chart by creating a new chart instance using the `pulumi/kubernetes` package. We will assume that you have a Kubernetes cluster already set up and that your Pulumi environment is configured to connect to it.

Firstly, we will need to import the necessary components from the `@pulumi/kubernetes` package. We instantiate a `Chart` resource, which represents the Helm chart we want to deploy. When instantiating the `Chart`, we provide a name for the chart, specify the chart repository (if it's from a custom repository), and pass configuration values which are equivalent to Helm's `values.yaml`. These values will configure the specifics of the `neo4j-cluster-core` deployment.

Here is the TypeScript program to deploy the `neo4j-cluster-core` Helm chart:

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

// Create a new Helm Chart for neo4j-cluster-core
const neo4jChart = new k8s.helm.v3.Chart("neo4j-core", {
    // If your Helm chart is in a custom repository, you can specify `repo` option here.
    // Otherwise, you can assume it is a chart available on the public Helm repository.

// Assuming "neo4j-cluster-core" is the chart name and it's available in the public chart repository, otherwise specify `repo`.
    chart: "neo4j-cluster-core",

// Specify the namespace to deploy the chart, if needed.
    namespace: "neo4j",

// Any custom values can be provided here as an object, as you would in a Helm values YAML file.
    // These values will override the default values provided by the Helm chart.
    values: {
        // Custom values for the neo4j cluster deployment
        // This is just an example, replace the properties and values with what is needed for the actual chart.
        core: {
            numberOfServers: 3,  // Number of instances in the neo4j cluster
            // Other configurations specific to neo4j-cluster-core chart
        },
        // ...
    },
});

// Export the Cluster IP for the neo4j service
export const neo4jClusterIP = neo4jChart.getResourceProperty("v1/Service", "neo4j-core", "spec.clusterIP");

// To run this program, you should execute the `pulumi up` command within your Pulumi project.
// Ensure that you have your Kubernetes cluster configured and kubectl context set for Pulumi to use.
```

Make sure to replace the property names and values in the `values` section with the proper configuration options required for the `neo4j-cluster-core` Helm chart. You can find the typical configurations in the chart's documentation or by using `helm show values chart-name`.

After writing the code in a file (e.g., `index.ts`), you would typically run `pulumi up` to preview and deploy the changes to your cluster. Make sure your Pulumi CLI is installed, and you are authenticated.

This program will create the necessary Kubernetes resources as defined by the Helm chart for Neo4j. It will export the Cluster IP of the Neo4j service, assuming that a service of type ClusterIP is created by the chart and it is named `neo4j-core`. This will allow other applications within your cluster to connect to Neo4j using the Cluster IP.

Please review the Helm chart's documentation for `neo4j-cluster-core` to understand what values are expected and how the chart is structured. The documentation should also provide guidelines for prerequisite resources or configurations on your cluster that the chart might depend on.