kubernit

Currently still in working progress, long term plan is to integrate it with libvirt to generate virtual machines for each node in the cluster.

Building with virtualbox

On virtualbox go to Global Tools -> Host networking manager then create a new vboxnet. Make a note of the range then go into pkg/init/cmd/rc.init/main.go and edit the following line with the ip e.g. 192.168.57.10/24

func doNetwork() {
	cmd := exec.Command("/sbin/ip", "addr", "add", "127.0.0.1/8", "dev", "lo", "brd", "+", "scope", "host")
	_ = cmd.Run()
	cmd = exec.Command("/sbin/ip", "route", "add", "127.0.0.0/8", "dev", "lo", "scope", "host")
	_ = cmd.Run()
	cmd = exec.Command("/sbin/ip", "link", "set", "lo", "up")
	_ = cmd.Run()
	cmd = exec.Command("/sbin/ip", "addr", "add", "192.168.57.10/24", "broadcast", "192.168.57.255", "scope", "global", "dev", "eth0")
	_ = cmd.Run()
	cmd = exec.Command("/sbin/ip", "route", "add", "default", "proto", "kernel", "scope", "link", "metric", "202", "dev", "eth0", "src", "192.168.57.10")
	_ = cmd.Run()
	cmd = exec.Command("/sbin/ip", "link", "set", "eth0", "up")
	_ = cmd.Run()
}

Build the iso by running:

make all

Build a new vm in virtualbox with type Linux and version Linux 2.6 / 3.x / 4.x (64 bit). Extend the memory size to about 8192MB and add a 8GB disk. Before running attach the iso and add the hostonly network we created at the start and a network nat on the the second adapter. Now you can start the VM.

Once the node has fully booted ssh to it by running ssh_into_kubelet script with the ip. Therefore in this example:

./ssh_into_kubelet.sh 192.168.57.10

Then run the following on the kubelet container:

kubeadm-init.sh

Once kubeadm exits, make sure to copy the kubeadm join arguments, and try kubectl get nodes from within the master.

If you just want to run a single node cluster with jobs running on the master, you can use:

kubectl taint nodes --all node-role.kubernetes.io/master- --kubeconfig /etc/kubernetes/admin.conf

To boot a node use:

./boot.sh <n> [<join_args> ...]