clayshek / caddy-raspi

caddy-raspi

Summary

Code for building a Kubernetes-deployable Docker image with the latest version of Caddy web server on top of the latest ARM32v6/Alpine release, for deployment on a Raspberry Pi K8s based cluster. Caddy installed with the Git & Prometheus plugins to enable content pulls from a Git repo and a Prometheus metrics endpoint, respectively.

Also includes a Kubernetes service & deployments template .yml file. Requires a working Kubernetes cluster and that image build be deployed to an appropriate container registry, like Docker Hub.

Usage

Clone repo.

Customize contents of Caddyfile appropriately for your setup. At a minimum, 'hostname:port' and Git repository endpoint.

Customize values in caddy-app.yml Kubernetes template file. At a minimum, customize container 'image' field. Caddy requires this value match request URL exactly. See https://caddyserver.com/tutorial/caddyfile.

Build image: docker build -t *image/name* .

Push image to registry, in this example, Docker Hub:

docker push image/name

Create Kubernetes Service and Deployment:

kubectl create -f caddy-app.yml

Deployment should now be active and accessible outside the cluster at the appropriate URL:Port for your configuration.

Some helpful topics & commands:

• Understanding Kubernetes Services / NodePort
• Show Kubernetes services: kubectl get svc
• Show K8s Deployments: kubectl get deployments
• Show K8s Pods with node placements: kubectl get pods -o wide
• Remove service and deployment from K8s: kubectl delete -f caddy-app.yml

To-Do

• Enable Automatic HTTPS
• Enable Caddy dymanic web content (FastCGI?)
• Potentially change dumb load balancing away from NodePort, possibly Ingress or make use of Nginx.

License

This is open-sourced software licensed under the MIT license.