https://github.com/adyanth/cloudflare-operator

A Kubernetes Operator to create and manage Cloudflare Tunnels and DNS records for (HTTP/TCP/UDP*) Service Resources
https://github.com/adyanth/cloudflare-operator

cloudflare cloudflare-tunnel cloudflared kubernetes kubernetes-operator operator operator-sdk

Last synced: 3 months ago
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A Kubernetes Operator to create and manage Cloudflare Tunnels and DNS records for (HTTP/TCP/UDP*) Service Resources

• Host: GitHub
• URL: https://github.com/adyanth/cloudflare-operator
• Owner: adyanth
• License: apache-2.0
• Created: 2022-01-02T19:38:54.000Z (almost 3 years ago)
• Default Branch: main
• Last Pushed: 2023-10-22T16:54:57.000Z (about 1 year ago)
• Last Synced: 2024-05-21T16:10:58.829Z (6 months ago)
• Topics: cloudflare, cloudflare-tunnel, cloudflared, kubernetes, kubernetes-operator, operator, operator-sdk
• Language: Go
• Homepage: https://adyanth.site/posts/migration-compose-k8s/cloudflare-tunnel-operator-architecture/
• Size: 722 KB
• Stars: 260
• Watchers: 5
• Forks: 26
• Open Issues: 25
• Metadata Files:
  • Readme: README.md
  • Funding: .github/FUNDING.yml
  • License: LICENSE

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• awesome-repositories - adyanth/cloudflare-operator - A Kubernetes Operator to create and manage Cloudflare Tunnels and DNS records for (HTTP/TCP/UDP*) Service Resources (Go)

README

        
Cloudflare Operator




  

    

  

  


  


    A Kubernetes Operator to create and manage Cloudflare Tunnels and DNS records 
 for (HTTP/TCP/UDP*) Service Resources

    


    


    Getting Started Guide »

    


    


    Report Bug

    ·

    Request Feature

    


  



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> **_NOTE_**: This project is currently in Alpha

> UDP*: UDP support for Cloudflare Tunnels is in [Early Access](https://blog.cloudflare.com/extending-cloudflares-zero-trust-platform-to-support-udp-and-internal-dns/)

## Motivation

The [Cloudflare Tunnels guide](https://developers.cloudflare.com/cloudflare-one/tutorials/many-cfd-one-tunnel) for deployment on Kubernetes provides a [manifest](https://github.com/cloudflare/argo-tunnel-examples/tree/master/named-tunnel-k8s) which is very bare bones and does not hook into Kubernetes in any meaningful way. The operator started out as a hobby project of mine to deploy applications in my home lab and expose them to the internet via Cloudflare Tunnels without doing a lot of manual work every time a new application is deployed.

## Overview

The Cloudflare Operator aims to provide a new way of dynamically deploying the [cloudflared](https://github.com/cloudflare/cloudflared) daemon on Kubernetes. Scaffolded and built using `operator-sdk`. Once deployed, this operator provides the following:

* Ability to create new and use existing Tunnels for [Cloudflare for Teams](https://developers.cloudflare.com/cloudflare-one/) using Custom Resources (CR/CRD) which will:

  * Accept a Secret for Cloudflare API Tokens and Keys

  * Run a scaled (configurable) Deployment of `cloudflared`

  * Manage a ConfigMap for the above Deployment

  * Have Cluster and Namespace scoped Tunnels

* A TunnelBinding controller which does the following:

  * Update the `cloudflared` ConfigMap to include the new Services to be served under a given Tunnel

  * Restart the `cloudflared` Deployment to make the configuration change take effect

  * Add a DNS entry in Cloudflare for the specified domain to be a [proxied CNAME to the referenced tunnel](https://developers.cloudflare.com/cloudflare-one/connections/connect-apps/routing-to-tunnel/dns)

  * Reverse the above when the TunnelBinding is deleted using Finalizers

## Bird's eye view

Here is how the operator and the Tunnel Resource fit into your deployment.

![Operator Architecture](images/OperatorArchitecture.png#center)

There is more detailed information on this architecture and the thought process behind it in my [blog post](https://adyanth.site/posts/migration-compose-k8s/cloudflare-tunnel-operator-architecture/).

## Getting Started

Go through the dedicated documentation on [Getting Started](docs/getting-started.md) to learn how to deploy this operator and a sample tunnel along with a service to expose.

Look into the [Configuration](docs/configuration.md) documentation to understand various configurable parameters of this operator.

> **_NOTE_**: This is **NOT** an official operator provided/backed by Cloudflare Inc. It utilizes their [v4 API](https://api.cloudflare.com/) and their [`cloudflared`](https://github.com/cloudflare/cloudflared) to automate setting up of tunnels on Kubernetes.