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


    In order to deploy your twitter-app Helm chart on a Digital Ocean Kubernetes cluster using Pulumi, we will go through a series of steps involving two main resources:

    1. digitalocean.KubernetesCluster: This resource will set up a Kubernetes cluster on Digital Ocean.
    2. kubernetes.helm.sh/v3.Chart: After having the Kubernetes cluster, we will make use of this resource to deploy the twitter-app Helm chart onto the cluster.

    Here is the outline of the steps that will be taken in the Pulumi program:

    • We will start by creating a new Kubernetes cluster on Digital Ocean with the necessary specifications.
    • Once the cluster is provisioned, we will use the Helm chart resource to deploy your twitter-app.
    • Finally, we will export the Kubernetes cluster's name and endpoint for you to access.

    Now, let's write out the program:

    import * as digitalocean from "@pulumi/digitalocean"; import * as k8s from "@pulumi/kubernetes"; // Create a new Digital Ocean Kubernetes cluster const cluster = new digitalocean.KubernetesCluster("twitter-app-cluster", { region: "nyc3", // Define the region where the cluster will be created version: "1.21.5-do.0", // Define the version of Kubernetes nodePool: { name: "worker-pool", size: "s-2vcpu-2gb", // Define the size of the Droplets nodeCount: 2, // Define the number of Droplet instances }, }); // Create a Kubernetes provider instance using the kubeconfig from the previously created cluster const k8sProvider = new k8s.Provider("do-k8s", { kubeconfig: cluster.kubeConfigs[0].rawConfig, }); // Deploy the twitter-app helm chart using the Pulumi Kubernetes provider const twitterAppChart = new k8s.helm.sh.v3.Chart("twitter-app", { chart: "twitter-app", // This assumes you have a helm chart named 'twitter-app' version: "0.1.0", // Replace with the correct chart version fetchOpts:{ repo: "http://charts.example.com/", // Replace with your Helm chart's repository URL }, }, { provider: k8sProvider }); // Export the cluster name and endpoint for accessing your Kubernetes cluster export const clusterName = cluster.name; export const kubeClusterEndpoint = cluster.endpoint;

    In the above program:

    • We import the necessary modules from @pulumi/digitalocean and @pulumi/kubernetes.
    • We create a Kubernetes cluster resource with an appropriate name, region, version, and droplet sizes.
    • The kubeconfig output from this cluster creation is used to define a Pulumi Kubernetes provider.
    • Finally, we use this provider to deploy a Helm chart which represents the twitter-app.

    After deploying your Helm chart, you can access your Kubernetes cluster by using the kubeconfig file, and you can manage your application within it using kubectl or similar tools. To use the code, place it in an index.ts file in a Pulumi project, and run pulumi up to preview and deploy the changes. Be sure to replace "twitter-app" and its version with the appropriate values for your application, and also replace the helm repo URL with the URL where your chart is hosted.