Deploy the keycloak-db helm chart on Digital Ocean Kubernetes Service

Question

Pulumi · Accepted Answer

To deploy the `keycloak-db` helm chart on the Digital Ocean Kubernetes Service using Pulumi, you'll first create a Kubernetes cluster in Digital Ocean. After that, you will deploy the Helm chart within this cluster. You'll use the `digitalocean` and `kubernetes` packages from Pulumi to achieve this. The `digitalocean.KubernetesCluster` resource is used to provision a Kubernetes cluster, and the `kubernetes.helm.v3.Chart` resource is used to deploy a Helm chart to the cluster.

Here's how you can do it in steps:
1. **Define the digital ocean Kubernetes cluster**: Create a new Kubernetes cluster in the desired region with the desired node size and count.
2. **Define the Helm chart deployment**: Once the cluster is available, use the Helm chart resource to deploy `keycloak-db` onto the cluster.

Below is the TypeScript program which performs the described steps. Please ensure you have `pulumi`, `@pulumi/pulumi`, `@pulumi/digitalocean`, and `@pulumi/kubernetes` packages installed in your project. The program assumes you have set up the Pulumi DigitalOcean provider with your credentials.

```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', // This is an example region, you should pick the one that suits you.
    version: 'latest', // Specify the version or use 'latest'.
    nodePool: {
        name: 'default',
        size: 's-2vcpu-2gb', // This is the size of the Droplets (nodes) within the node pool.
        nodeCount: 3, // Specify the number of nodes.
    },
});

// Once the cluster is provisioned, create a provider to deploy the Helm Chart.
const k8sProvider = new k8s.Provider('do-k8s', {
    kubeconfig: cluster.kubeConfigs[0].rawConfig,
});

// Deploy Keycloak DB Helm chart into the Digital Ocean Kubernetes cluster.
const keycloakDbChart = new k8s.helm.v3.Chart('keycloak-db', {
    chart: 'keycloak-db', // Replace with the correct Helm chart name.
    version: '1.0.0', // Use the version of the chart you aim to deploy.
    fetchOpts: {
        repo: 'https://charts.your-repo.com/', // Provide the Helm repository containing your chart.
    },
}, { provider: k8sProvider });

// Export the cluster's kubeconfig and the service IP of the Keycloak instance.
export const kubeconfig = cluster.kubeConfigs[0].rawConfig;
export const keycloakServiceIP = keycloakDbChart.getResourceProperty('v1/Service', 'keycloak-db', 'status');
```

Here's what each section of the code is doing:

- **DigitalOcean Kubernetes Cluster**: Through the `digitalocean.KubernetesCluster` resource, we define our desired Kubernetes cluster. You can customize the region, version, size, and number of nodes according to your needs.

- **Kubernetes Provider**: Once the Kubernetes cluster is up and running, we need to initialize the Pulumi Kubernetes provider with the kubeconfig we get from DigitalOcean. This allows Pulumi to interact with the cluster.

- **Helm Chart**: Using the `kubernetes.helm.v3.Chart` resource, the Helm chart for `keycloak-db` is deployed to the Kubernetes cluster. Ensure you provide the correct Helm chart name and repository.

Finally, we export some outputs that may be beneficial, such as the kubeconfig file necessary to interact with the cluster using tools like `kubectl`, and the status IP of the deployed Keycloak service.

To deploy this Pulumi program:

1. Save the code in a file with a `.ts` extension (e.g., `index.ts`).
2. Open your terminal, navigate to the directory containing the file, and run `pulumi up`.

This will automatically provision the cluster and deploy the chart based on the Pulumi program described above.