Deploy the goalert helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

Deploying a Helm chart to a Kubernetes cluster involves several steps: creating the cluster, setting up the necessary configurations, and deploying the Helm chart itself. In this Pulumi program in TypeScript, we'll go through creating a DigitalOcean Kubernetes (DOKS) cluster, and then deploying the **goalert** Helm chart to it.

First, we create a DigitalOcean Kubernetes cluster using `digitalocean.KubernetesCluster` which is a resource that provisions a Kubernetes cluster on DigitalOcean's cloud infrastructure. The minimal required properties for this resource include the name, region, version, and node pool configuration.

After setting up the cluster, we'll use the `kubernetes.helm.v3.Chart` resource from the Kubernetes provider to deploy the **goalert** Helm chart to our newly created cluster. This resource is a representation of a Helm chart in Pulumi which allows you to deploy, upgrade, and manage Helm charts and their releases.

Lastly, we need to set up a provider that specifies how to connect to the DigitalOcean Kubernetes cluster. A Kubernetes provider resource needs the kubeconfig file of the DOKS cluster to interact with it.

Below is the Pulumi program that accomplishes these tasks:

```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: 'nyc1',
    version: '1.21.5-do.0',
    nodePool: {
        name: 'default',
        size: 's-2vcpu-2gb',
        nodeCount: 1,
    },
});

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

// Deploy the goalert Helm chart to the DigitalOcean Kubernetes cluster
const goalertChart = new k8s.helm.v3.Chart('goalert', {
    chart: 'goalert',
    version: 'x.y.z', // specify the version of the chart
    fetchOpts: {
        repo: 'https://example.com/helm-charts', // specify the Helm chart repository
    },
}, { provider: k8sProvider });

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

In this code block, make sure to replace the placeholder values like `x.y.z` with the actual version number of the **goalert** Helm chart you want to deploy, and `https://example.com/helm-charts` with the correct Helm repository URL that hosts the **goalert** chart.

Also ensure to select the appropriate region, Kubernetes version, and node size for the `digitalocean.KubernetesCluster` resource based on your requirements and the availability in your DigitalOcean account.

After deploying this program with Pulumi by running `pulumi up`, you will have a new DigitalOcean Kubernetes cluster running with the **goalert** Helm chart deployed on it. The exported `kubeconfig` can be used with `kubectl` to interact with your Kubernetes cluster and manage your Helm chart deployment.