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.
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
- Enable Automatic HTTPS
- Enable Caddy dymanic web content (FastCGI?)
- Potentially change dumb load balancing away from NodePort, possibly Ingress or make use of Nginx.
This is open-sourced software licensed under the MIT license.