So you've setup a Raspberry Pi kubernetes cluster just as I did? Now you want to deploy the first applications on it but you are unsure how to start?

This repo is for you me.

In this repo you can find a index.html directly in the root folder. Deploy it as a website to your Kubernetes (K8S) Cluster with the following commands.

kubectl create namespace helloworld
kubectl create configmap hello-world --from-file ./index.html --namespace helloworld
kubectl apply -f ./hello-world.yml --namespace helloworld

You will be able to reach that example page by either going on

• http://8ls.co
• http://pi501.local
• http://pi501.fritz.box

In the example before I used the nginx docker image. If deploying own apps it makes sense to build docker images yourself.

When using those docker images in Kubernetes you need to configure that you can login to dockerhub or whatever service you use.

Therefore I suggest you login using your docker client. Then you do the following

kubectl create secret docker-registry mysecretname \
--docker-server=https://ghcr.io \
--docker-username=xxx \
--docker-password=xxx \
--docker-email=xxx \
--namespace helloworld

or

kubectl create secret docker-registry mysecretname \
--from-file=.dockerconfigjson=path/to/.docker/config.json

When the kubernetes cluster is downloading your special docker images you might run into issues when you are building the images for a platform e.g. x86 but your cluster (in my case three arm64 Raspberry Pi 5) you have a different platform you will run into issues.

What needs to be done is that you build for the right platform.

I find it the most easy approach to do so with github actions.