Deploy the nuxt3 helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

Deploying a Nuxt.js application using a Helm chart on DigitalOcean's Kubernetes Service (DOKS) involves several steps. Helm charts allow you to define, install, and upgrade even the most complex Kubernetes applications. For a Nuxt.js application, you'll need to package your app into a container, push it to a registry, then create a Helm chart for your app or modify an existing one.

I'll guide you through setting up a DOKS cluster, creating the necessary Kubernetes and Helm components using Pulumi, and then deploying your Nuxt.js application on it.

First, let's set up your DigitalOcean Kubernetes Cluster using Pulumi:

1. Install your cluster: This involves defining the cluster with a specific region, version, node size, and count.
2. Set up your Helm release: Helm charts will define the deployment, including your application image and service types.

Here's a Pulumi TypeScript program that will create a DOKS cluster and deploy the Nuxt.js application through a Helm chart:
```typescript
import * as pulumi from '@pulumi/pulumi';
import * as digitalocean from '@pulumi/digitalocean';
import * as k8s from '@pulumi/kubernetes';

// Create a DigitalOcean Kubernetes cluster
const cluster = new digitalocean.KubernetesCluster('do-cluster', {
  region: 'nyc3',
  version: '1.21.5-do.0',
  nodePool: {
    name: 'default',
    size: 's-2vcpu-2gb',
    nodeCount: 2,
  },
});

// Export the cluster's kubeconfig.
export const kubeconfig = cluster.kubeConfigs[0].rawConfig;

// Create a Kubernetes provider instance that uses our kubeconfig.
const k8sProvider = new k8s.Provider('do-k8s', {
  kubeconfig: cluster.kubeConfigs[0].rawConfig,
});

// Deploy the Nuxt.js application using Helm chart
const chart = new k8s.helm.v3.Chart('nuxt-chart', {
  chart: 'nuxt',
  version: '1.0.0',
  fetchOpts: {
    repo: 'http://your-helm-chart-repository/',
  },
  // Set custom values for the Helm chart, such as image repository, tag, and any other necessary values
  values: {
    // These values would depend on the specific Helm chart you're using
    image: {
      repository: 'your-docker-image-repository',
      tag: 'latest',
    },
    service: {
      type: 'ClusterIP',
    },
  },
}, { provider: k8sProvider });

// Export the public IP address of the Nuxt.js application.
export const serviceIP = chart.getResourceProperty('v1/Service', 'nuxt-service', 'status').apply(status => status.loadBalancer.ingress[0].ip);
```

In this program:

- We first import the required Pulumi packages.
- A new DOKS cluster is created with the `digitalocean.KubernetesCluster` class, specifying the region, Kubernetes version, node size, and count.
- We export the generated kubeconfig for the cluster.
- We create a Kubernetes Provider with the exported kubeconfig, which allows Pulumi to communicate with our cluster.
- We then declare a Helm chart resource with the `k8s.helm.v3.Chart` class. Replace `'http://your-helm-chart-repository/'` with the actual repository URL where your Helm chart is located and be sure to set the correct image repository and tag. This chart could be a generic Nuxt.js chart or one customized for your particular application.
- Finally, we use the `export` statement to expose the public IP of our Nuxt.js application, which is obtained from the information regarding the deployed Helm chart's service.

You can define your Nuxt.js application and create your Docker image within your project. The Helm chart should be tailored to properly manage your Nuxt.js deployment and services within Kubernetes.

To run this Pulumi program:

1. Ensure you have Pulumi installed and configured for use with DigitalOcean.
2. Save the code in a file with a `.ts` extension, for example, `index.ts`.
3. Run `npm install` to install the necessary packages.
4. Use the Pulumi CLI to create a new stack and deploy your infrastructure: `pulumi up`.

This is a starting point, and you might need to refine your Helm chart values or Kubernetes configurations according to your application's specifications.

Remember to check the [Pulumi documentation for DigitalOcean](https://www.pulumi.com/docs/reference/pkg/digitalocean/kubernetescluster/) and [Kubernetes](https://www.pulumi.com/docs/reference/pkg/kubernetes/helm/v3/chart/) for more details.