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

Question

Pulumi · Accepted Answer

To deploy the `simple-keycloak` helm chart on Digital Ocean Kubernetes Service using Pulumi, you would need to take the following steps:

1. **Set up a Digital Ocean Kubernetes Cluster**: Create a Kubernetes cluster to which the `simple-keycloak` chart will be deployed. In Pulumi, you would use the `digitalocean.KubernetesCluster` resource to create this cluster.

2. **Install Helm Chart**: Once your Kubernetes cluster is ready, you can deploy Helm charts using the `kubernetes.helm.v3.Chart` resource which represents a Helm chart in a Pulumi program.

Here's a detailed program written in TypeScript that demonstrates these steps:

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

// Step 1: Create a DigitalOcean Kubernetes Cluster
const cluster = new digitalocean.KubernetesCluster("do-cluster", {
    region: digitalocean.Regions.NYC1, // You can change the region as needed
    version: "latest",  // You can specify the exact version of Kubernetes
    nodePool: {
        name: "default",
        size: digitalocean.DropletSlugs.DropletS2VCPU2GB, // You can change the size as needed
        nodeCount: 2, // Desired number of nodes in the node pool
    },
});

// Step 2: Deploy the 'simple-keycloak' Helm chart to the cluster

// Create an instance of the k8s Provider pointing to the kubeconfig of the cluster we created.
const k8sProvider = new k8s.Provider("k8s-provider", {
    kubeconfig: cluster.kubeConfigs[0].rawConfig,
});

// Deploy the `simple-keycloak` Helm chart
const keycloakChart = new k8s.helm.v3.Chart("simple-keycloak", {
    chart: "keycloak", // Replace with 'simple-keycloak' if that's the actual chart name
    version: "11.1.0", // Specify the chart version you want to deploy
    namespace: "default",
    fetchOpts:{
        repo: "http://charts.bitnami.com/bitnami", // The repository where the chart is stored
    },
}, { provider: k8sProvider });

// Export the cluster's kubeconfig and keycloak endpoint
export const kubeconfig = cluster.kubeConfigs[0].rawConfig;
export const keycloakEndpoint = keycloakChart.getResourceProperty("v1/Service", "simple-keycloak", "status").apply(status => status.loadBalancer.ingress[0].ip);

```

Let's break down what the above code is doing:
- We import the necessary Pulumi libraries for Digital Ocean (`@pulumi/digitalocean`) and Kubernetes (`@pulumi/kubernetes`).
- We create a new Kubernetes cluster on Digital Ocean using the `digitalocean.KubernetesCluster` resource. Here we specify the region, the version of Kubernetes, and the details about the node pool including the size and count of nodes.
- These details can be changed based on your needs, like choosing a different region or node size.
- After the cluster is created, we set up a provider that uses the cluster's kubeconfig. This provider will be used for deploying Helm charts.
- Using `k8s.helm.v3.Chart`, we then deploy the `simple-keycloak` Helm chart. Note that you need to replace `"keycloak"` with `"simple-keycloak"` and provide the correct version if it's different.
- `fetchOpts` contains information about where the Helm chart can be fetched from. The repository URL will be different if `simple-keycloak` is hosted somewhere other than the Bitnami chart repository.
- We're deploying the Helm chart in the `default` namespace; however, you can specify a different namespace if required.
- Finally, we export the kubeconfig for the cluster and the IP for the services that `simple-keycloak` will create. This allows you to interact with your Keycloak instance by visiting the IP address in a web browser.

Remember to install the Pulumi CLI and set up the Digital Ocean provider before running this code. You can sign up and configure your Digital Ocean token according to Pulumi's documentation.
To run this program, you simply execute `pulumi up` in your command line within the same directory as your Pulumi program. This will prompt Pulumi to begin provisioning the resources on Digital Ocean and deploying the Helm chart.