1. Deploy the centos-twwiki helm chart on Digital Ocean Kubernetes Service


    To deploy a Helm chart on a Kubernetes cluster in DigitalOcean, you will need to perform a few key steps:

    1. Create a DigitalOcean Kubernetes (DOKS) cluster: You’ll start by creating a DOKS cluster using Pulumi's DigitalOcean provider. The cluster will be the foundational infrastructure on which your Helm chart will be deployed.

    2. Install the Helm Chart: Once the DOKS cluster has been provisioned, you’ll deploy the centos-twwiki Helm chart to this cluster. To do this, you’ll use Pulumi’s Kubernetes provider which facilitates the deployment of Helm charts among other Kubernetes resources.

    For this task, we will:

    • Define the DOKS cluster using the digitalocean.KubernetesCluster resource.
    • Deploy the centos-twwiki Helm chart using the kubernetes.helm.v3.Chart resource after the cluster has been created.

    To complete these steps, ensure you have the following prerequisites:

    • Pulumi CLI: Installed and configured to connect to your desired cloud provider.
    • DigitalOcean Access: You need access to your DigitalOcean account with permissions to create Kubernetes clusters and manage resources.

    Below is a Pulumi program written in TypeScript that accomplishes these tasks. The code includes comments to help you understand what each part does:

    import * as digitalocean from "@pulumi/digitalocean"; import * as kubernetes from "@pulumi/kubernetes"; import * as pulumi from "@pulumi/pulumi"; // Create a DigitalOcean Kubernetes cluster const cluster = new digitalocean.KubernetesCluster("do-cluster", { region: "nyc1", // Specify the region where the cluster will be created version: "latest", // Use the latest available version for the Kubernetes cluster nodePool: { name: "default-pool", size: "s-1vcpu-2gb", // Specify the size of the droplet (VM) nodeCount: 1, // The number of droplets to be created in the node pool }, }); // Export the cluster configuration which is required for the Kubernetes provider to deploy resources to this cluster export const kubeConfig = cluster.kubeConfigs[0].rawConfig; // Create a Kubernetes provider instance using the kubeConfig from the DOKS cluster. const k8sProvider = new kubernetes.Provider("k8s-provider", { kubeconfig: kubeConfig, }); // Deploys the centos-twwiki Helm chart to the DigitalOcean Kubernetes cluster. const centosTwwikiChart = new kubernetes.helm.v3.Chart("centos-twwiki", { chart: "centos-twwiki", version: "x.x.x", // Specify the chart version, use the appropriate version for the chart you're deploying fetchOpts:{ repo: "http://chart-repository-url/" // Replace with the chart repository URL }, }, { provider: k8sProvider }); // Export the URL for the deployed twwiki application. To do this, you would // typically look up the service or ingress created by the Helm chart and export its endpoints. // However, without specific details about the services created by Helm, // we are making a placeholder for you to add post-deployment details. export const twwikiURL = pulumi.output("http://<external-ip>/twwiki"); // Replace `<external-ip>` with the actual IP.

    Before this code will work as a Pulumi program, replace "http://chart-repository-url/" with the actual URL pointing to where the centos-twwiki chart repository is hosted.

    Here's a breakdown of what the code does:

    • DigitalOcean Kubernetes Cluster: The digitalocean.KubernetesCluster resource creates a new Kubernetes cluster in the specified region with the different properties such as node size, and the number of nodes. The region here is nyc1, which you can change to the region closer to you or to your users for better performance.

    • Kubeconfig: kubeConfig captures the configuration needed to connect to the created DigitalOcean Kubernetes cluster. This configuration will be used by the Kubernetes provider, which allows Pulumi to perform operations on the Kubernetes cluster.

    • Kubernetes Provider: We instantiate the kubernetes.Provider, allowing us to interact with the Kubernetes cluster by giving Pulumi the kubeconfig of the created DOKS.

    • centos-twwiki Helm Chart: The kubernetes.helm.v3.Chart resource represents a Helm chart. In this case, we are deploying the centos-twwiki chart into the previously defined Kubernetes cluster. You need to specify the version of the chart as well as the repository URL where it's hosted.

    • Exported URL: After deploying the Helm chart, you might want to access the deployed application. The exported twwikiURL is a placeholder for where you will have the application URL after the deployment is complete. You would typically look up the Kubernetes Service or Ingress created by the Helm chart to obtain a public IP or hostname.

    Remember to replace placeholder values in the code with actual values that correspond with your Helm chart and DigitalOcean configuration. This includes the Helm chart version and repository URL, as well as updating the exported URL after deploying the chart to get the correct access endpoint.

    To run this program:

    1. Save the code to a file with a .ts extension, for example, deployCentosTwwiki.ts.
    2. Run pulumi up in the terminal within the directory where the script is located to create the resources.

    Please make sure you have the Pulumi CLI installed and configured for TypeScript, as well as access to your DigitalOcean account.