Deploy the glance helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the Glance Helm chart on Digital Ocean Kubernetes Service, we will first set up a Kubernetes cluster on Digital Ocean. Once we have the cluster running, we will deploy the Glance Helm chart to the cluster.

Here is how we can accomplish this using Pulumi with TypeScript:

1. **Setting up a Digital Ocean Kubernetes Cluster**: We will use the `digitalocean.KubernetesCluster` resource to create a new Kubernetes cluster in the Digital Ocean cloud.

2. **Deploying the Glance Helm Chart**: After the cluster is up and running, we will deploy the Glance Helm chart using the `kubernetes.helm.sh/v3.Chart` resource from the Pulumi Kubernetes provider. This resource allows us to deploy Helm charts within our Kubernetes cluster.

Let's break down the code step-by-step.

First, we will install the necessary Pulumi packages. The Digital Ocean Kubernetes cluster creation requires the `@pulumi/digitalocean` package, and for deploying Helm charts, we need the `@pulumi/kubernetes` package. You can install these packages using npm or yarn:

```shell
npm install @pulumi/digitalocean @pulumi/kubernetes
```

Now let's take a look at the Pulumi program:

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

// Step 1: Set up a Digital Ocean Kubernetes cluster
const cluster = new digitalocean.KubernetesCluster("do-cluster", {
    region: "nyc3",
    version: "latest", // specify the desired version string or use "latest"
    nodePool: {
        name: "default",
        size: "s-2vcpu-2gb", // this is a basic node size, you can select according to your needs
        nodeCount: 2, // the number of nodes in the cluster
    },
});

// Step 2: Deploy the Glance Helm chart to the cluster
// Initialize a Kubernetes provider configured to the newly created cluster
const k8sProvider = new k8s.Provider("k8s-provider", {
    kubeconfig: cluster.kubeConfigs[0].rawConfig,
});

// Deploy the Glance Helm chart using the Kubernetes Helm Chart resource
const glanceChart = new k8s.helm.v3.Chart("glance", {
    chart: "glance",
    // You would need to specify the repo or a local path to the chart if it's not a stable chart that Helm already knows about.
    // For example: repo: "https://charts.example.com/" 
    // Ensure you have the correct repository and chart name for Glance.
    version: "1.0.0", // specify the chart version
    namespace: "default", // specify the namespace if needed, defaults to "default"
}, { provider: k8sProvider });

// Export the cluster's kubeconfig and the Helm chart name
export const kubeconfig = cluster.kubeConfigs[0].rawConfig;
export const glanceChartName = glanceChart.metadata.apply(meta => meta.name);
```

In the program above:

- We create a Digital Ocean Kubernetes cluster with the name "do-cluster". The node size is set to a basic one, and we deploy 2 nodes. You can adjust the size and the number of nodes according to your requirements.
- We then declare a new `k8s.Provider`, which is configured using the kubeconfig from the created cluster. This provider is used to interact with the Digital Ocean Kubernetes cluster to manage resources.
- Using the Kubernetes provider, we create a new Helm Chart resource, which deploys the Glance Helm chart to the Digital Ocean Kubernetes cluster. Make sure to use the correct repository and chart name for Glance.
- Lastly, we export the raw kubeconfig of the Digital Ocean Kubernetes cluster and the name of the deployed Glance Helm chart.

With this Pulumi program, you will have a Digital Ocean Kubernetes cluster with the Glance Helm chart deployed on it. Just run `pulumi up` to apply the program, and it will provision the infrastructure and deploy the Helm chart as defined. Ensure you have set up your Digital Ocean access token and Pulumi CLI before running the program.