This project includes some bootstrap scripts for setup a simple kubernetes cluster infrastructure based on kubernetes 1.6+.
The idea is to setup the cluster using kubeadm (https://kubernetes.io/docs/getting-started-guides/kubeadm) and put some additional tooling around the cluster. (thanks to luxas https://github.com/luxas/kubeadm-workshop)
-
regenerate a unique machine-id on all nodes if you are running hypriot os (thanks to https://ro14nd.de/k8s-on-pi-update)
dbus-uuidgen > /etc/machine-id -
on master
kubeadm init --config kubeadm.yaml -
remember the token printed out on execution of
kubeadm init -
install an overlay network, for example weave net: (refer https://kubernetes.io/docs/setup/independent/create-cluster-kubeadm/)
kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$kubever" -
wait until all container are running
kubectl --namespace kube-system get po -
on worker
kubeadm join <masterip> --token <token>
All addional tooling is setup using docker-compose.
A startup script is placed in the architecture depending subdirectory x86 or arm (for rpi).
At the moment I do not need a Loadbalancer, but I need a landing page with all services with their nodeports on it.
The landing page should be updated automatically and published by an nginx server running outside the kubernetes cluster.
In order to provide easy persistent volumes to pods a nfs server is setup outside the k8s cluster.
The nfs server is running inside a docker container. Be sure the needed kernel modules are loaded into the host kernel:
modprobe nfs
modprobe nfsd
The share can be mount by clients using the ip of the host where the nfs-server is running:
sudo mount -t nfs4 <hostOfNfsServer>:/ <localMountPoint>
Additionally this project will filled up with some experimental k8s deployments for the cluster