Deploy the apollo helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy the Apollo Helm chart on a Kubernetes cluster using Pulumi, you will primarily be making use of the `helm.sh/v3.Chart` resource from the Pulumi Kubernetes provider. This resource enables you to deploy Helm charts into your Kubernetes clusters. Before you begin, ensure that you have a Kubernetes cluster already running and that you have configured your Pulumi environment with the necessary credentials to communicate with your cluster.

Here is the breakdown of the steps that you'll take in the Pulumi program:

1. Import the necessary Pulumi and Kubernetes packages.
2. Use the `helm.sh/v3.Chart` resource to deploy the Apollo Helm chart.
3. Set any required configuration values for the Apollo chart (might need to check the chart's values.yaml or official documentation for any required or custom configurations).
4. Export any relevant stack outputs such as the Kubernetes Service endpoint if you intend to access the Apollo service from outside the cluster.

Below is the Pulumi TypeScript program that performs the above steps:

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

// Replace the following variables with the appropriate values for your specific use case.
const namespace = "default"; // Specify the namespace where you want to deploy the chart.
const releaseName = "apollo"; // Choose a release name for your Helm deployment.
const chartName = "apollo"; // This should correspond to the helm chart you wish to deploy.
const chartVersion = "x.y.z"; // Replace with the specific version of the chart you want to deploy.
const repo = "https://example.com/helm-charts"; // Replace with the URL of the Helm chart repository.

// Deploy the Apollo Helm chart.
const apolloChart = new k8s.helm.sh.v3.Chart(releaseName, {
    chart: chartName,
    version: chartVersion,
    namespace: namespace,
    fetchOpts: { repo: repo },
    // If there are custom values you wish to override, specify them here.
    // For example, if you need to set a `service.type` to `LoadBalancer`, you would include it like this:
    // values: {
    //   service: { type: "LoadBalancer" },
    // },
});

// To access your service from outside the cluster, you can export the service's endpoint.
// The following is a conditional export that assumes your Apollo service is of type LoadBalancer and gets the public IP.
// You would adjust the export according to the actual service configuration.
export const apolloServiceEndpoint = apolloChart.getResourceProperty(
    "v1/Service", `${namespace}/${releaseName}-apollo`, "status"
).apply(status => status.loadBalancer?.ingress[0]?.ip || "");

```

**Explanation:**

- **Importing Packages:** We begin by importing the necessary Pulumi package for Kubernetes.

- **Release Name and Chart Details:** We initialize variables with the names of the namespace, release name, chart name, chart version, and repository location. These will be used to customize your Helm chart deployment.

- **Deploy the Chart:** We create an instance of `helm.sh/v3.Chart`, which manages the installation of the Helm chart in the specified namespace. Here, we not only mention the chart name and version but also specify where the chart can be fetched from using the `repo` url.

- **Custom Values:** There is a placeholder for `values` where you can specify any custom configurations that are specific to the Apollo chart. This typically involves looking into the chart's `values.yaml` file and determining if there are any parameters you wish to override with your values.

- **Service Endpoint Export:** Optionally, if your Apollo service exposes an external endpoint, we can try to export the address of this service. The `apolloServiceEndpoint` export retrieves the IP address of the LoadBalancer service if that's what you're using.

Please replace the placeholders in the program such as repository URL, chart name, and any custom values you wish to use for deployment with the actual values that fit your requirements. If you are unsure of these values, you typically find them in the documentation or repository of the Helm Chart you want to install.

Remember, this program assumes that you have already configured your Pulumi environment to communicate with your Kubernetes cluster and that you are using the default Pulumi stack configuration isn't required for this deployment.