Using kubernetes tekton.dev with cloudflare.zelic.io

Question

Pulumi · Accepted Answer

To integrate Kubernetes with Tekton for CI/CD pipelines and Cloudflare for DNS and CDN, we'll use Pulumi to provision the necessary resources. Tekton provides Kubernetes-native resources for declaring CI/CD-style pipelines. Cloudflare is a service that provides DNS, CDN, and security features. Through Pulumi, you can manage Cloudflare resources using Pulumi's Cloudflare provider, and manage Tekton resources within a Kubernetes cluster using Pulumi's Kubernetes provider.

First, we'll deploy a Kubernetes cluster where we can run Tekton pipelines. Then, we'll install Tekton into the cluster and create a basic pipeline as an example. Lastly, we'll provision a DNS record on Cloudflare to point to an application or service that we deploy to the Kubernetes cluster.

Here's how you might do it step by step:

1. **Deploy a Kubernetes Cluster**: This can be done using any cloud provider like AWS, Azure, or GCP. For simplicity, I'm going to assume you already have a Kubernetes cluster running.

2. **Install Tekton**: Once you have your cluster, you can install Tekton by applying its yaml definitions to the cluster. We will define a simple Tekton pipeline that has tasks for building a Docker image and deploying it to the cluster.

3. **Configure Cloudflare**: Using Pulumi's Cloudflare provider, we'll set up a DNS record that points to our application running in the Kubernetes cluster.

Below is a TypeScript program that demonstrates these steps.

Replace the placeholder values with your actual domain name and API token. Ensure your Pulumi stack is set up with the `cloudflare:apiToken` configuration.

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

// Load the Pulumi config.
const config = new pulumi.Config();

// Assume the Kubernetes provider is already configured to connect to an existing cluster.
// This might have been set up via `pulumi config set kubernetes:...` or via environment variables.

// Create a new instance of the Kubernetes Provider.
const k8sProvider = new k8s.Provider("k8s-provider", {});

// Install Tekton Pipelines into your Kubernetes cluster.
const tektonNamespace = new k8s.core.v1.Namespace("tekton-namespace", {
  metadata: { name: "tekton-pipelines" },
}, { provider: k8sProvider });

const tektonRelease = new k8s.yaml.ConfigFile("tekton-release", {
  file: "https://storage.googleapis.com/tekton-releases/pipeline/previous/v0.11.3/release.yaml",
}, { provider: k8sProvider, dependsOn: [tektonNamespace] });

// Example: Define a Tekton Task and Pipeline (Placeholders provided for illustration purposes)
const exampleTask = new k8s.apiextensions.CustomResource("example-task", {
  apiVersion: "tekton.dev/v1beta1",
  kind: "Task",
  metadata: { namespace: tektonNamespace.metadata.name },
  spec: {
    // Define task steps here
  }
}, { provider: k8sProvider, dependsOn: [tektonRelease] });

const examplePipeline = new k8s.apiextensions.CustomResource("example-pipeline", {
  apiVersion: "tekton.dev/v1beta1",
  kind: "Pipeline",
  metadata: { namespace: tektonNamespace.metadata.name },
  spec: {
    // Define pipeline structure here
  }
}, { provider: k8sProvider, dependsOn: [exampleTask] });

// Configure Cloudflare DNS for the application.
const domainName = "example.com";  // Replace with your domain name
const appName = "myapp"; // Application name to form the subdomain

const dnsRecord = new cloudflare.Record("dns-record", {
    // Assumes the `zoneId` is already known or retrieved from a data source.
    zoneId: config.require("cloudflareZoneId"),
    name: `${appName}.${domainName}`,
    type: "A",
    value: "192.0.2.1", // Replace with the external IP address of your service.
    ttl: 300,
});

// Export the Cloudflare DNS record name.
export const dnsRecordName = dnsRecord.name;

```

In this program:

- We use the `@pulumi/kubernetes` and `@pulumi/cloudflare` packages to work with Kubernetes resources and Cloudflare.
- We assume you have a Kubernetes cluster already set up. You need to configure the Pulumi Kubernetes provider with credentials to access your cluster.
- We create a namespace and install Tekton using its release YAML. This part may require modifications depending on the version of Tekton you're deploying.
- We define placeholder custom resources for Tekton tasks and pipelines. Typically, you'd customize the `spec` of these resources with your build and deploy steps.
- We set a DNS record using Cloudflare. A real-world deployment would determine the service's external IP dynamically.

Modify this code according to your actual setup and usage. Ensure that the cluster is accessible through the Kubernetes provider and you have the necessary permissions to manipulate resources in Cloudflare.