1. Deploy the nginx-app helm chart on Digital Ocean Kubernetes Service


    Deploying an nginx Helm chart on DigitalOcean Kubernetes Service (DOKS) involves several steps, including setting up a Kubernetes cluster on DigitalOcean, installing and configuring Helm, and finally deploying the nginx chart. We will use Pulumi to define and create the necessary infrastructure in a reproducible manner. Below, I will guide you through a Pulumi program in TypeScript that accomplishes this goal.

    Step 1: Define the DigitalOcean Kubernetes Cluster

    First, we create a Kubernetes cluster on DigitalOcean using the digitalocean.KubernetesCluster resource. This defines the cluster's configuration including its region, version of Kubernetes, the size of the nodes, and the number of nodes.

    Step 2: Install and Configure the Helm Chart

    With the cluster in place, we can now use the kubernetes.helm.v3.Chart resource, which is a Pulumi resource to manage Helm charts, to deploy the nginx application. We do this by providing the repository where the nginx chart is located and other optional parameters such as the chart version and configuration values that are specific to the nginx chart.

    Here is the Pulumi program for deploying the nginx-app Helm chart on a DigitalOcean Kubernetes cluster:

    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, version: "latest", // or specify a specific version of Kubernetes nodePool: { name: "default", size: digitalocean.DropletSlugs.DropletS2VCPU2GB, nodeCount: 2, }, }); // Export the DigitalOcean Kubeconfig export const kubeconfig = cluster.kubeConfigs[0].rawConfig; // Step 2: Deploy nginx using Helm chart // Create a Kubernetes provider instance that uses our cluster from above. const k8sProvider = new k8s.Provider("do-k8s", { kubeconfig: kubeconfig, }); // Deploy the nginx-app Helm chart into the cluster const nginxChart = new k8s.helm.v3.Chart("nginx-app", { chart: "nginx", version: "1.16.1", // specify the version of the chart fetchOpts:{ repo: "https://charts.bitnami.com/bitnami", }, }, { provider: k8sProvider }); // Export the public IP from the deployed nginx service to access the nginx server export const nginxPublicIP = nginxChart.getResourceProperty("v1/Service", "nginx-app-nginx", "status").apply(status => status.loadBalancer.ingress[0].ip);

    This Pulumi program first defines a DigitalOcean Kubernetes cluster with a few specifications, like the size and count of nodes as well as the region, before deploying an nginx Helm chart using the Kubernetes provider. The kubeconfig is exported, allowing you to interact with your new cluster using the kubectl command-line tool. The program also attempts to export the public IP address of the nginx service once deployed; however, note that this IP might not be immediately available. It sometimes requires waiting for the service's load balancer to be provisioned in the cloud provider.

    Applying the Pulumi Program

    To apply this Pulumi program:

    1. Save the code in a file named index.ts.
    2. Run the pulumi up command from your terminal in the same directory where this file is located.
    3. Pulumi CLI will show you a preview of the resources to be created. Confirm the operation to proceed.
    4. Once complete, Pulumi will output the public IP address of your nginx deployment.

    Remember to install the Pulumi CLI and set up the DigitalOcean provider with an access token before running this program. Additionally, you will need to install Node.js and Pulumi's NPM packages to execute the TypeScript program.

    If you have any questions about this process or need further assistance, feel free to ask!