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Kubeup

Simple Kubernetes cluster creator based on kubeadm for libvirt (Linux). Default setup is a single master with three nodes

Kubernetes Versions Supported

master branch contains support for the last three verions of Kubernetes.

Git Tags

  • Tag v3.0.0+ uses K3S+Cilium and no kube-proxy
  • Tag v2.0.0+ supports Kubernetes 1.24+
  • Tag v1.0.0 supports up to Kubernetes 1.23

Requirements

Install qemu-kvm, libvirt

Ubuntu

sudo apt install qemu-kvm libvirt-daemon-system libvirt-clients bridge-utils

Fedora

sudo dnf -y install qemu-kvm libvirt

CentOS 7

  • Run the following:
sudo yum install epel-release
sudo yum install qemu libvirt qemu-kvm

Usage

Add your user to libvirt group

sudo usermod -a -G libvirt $(whoami)

This will allow the up.sh script to run without sudo later on.

You may also need to restart libvirtd to pick up the change.

sudo systemctl restart libvirtd.service

Create global_vars.yml

If you have not already done so, create global_vars.yml:

$ cp global_vars.yml.tmpl global_vars.yml

Edit global_vars.yml accordingly, then to create the cluster, type:

$ ./up.sh

The Kubernetes configuration is then copied from the master node to the host and can be used as follows:

$ kubectl --kubeconfig=kubeconfig-k8s1.conf get nodes
NAME                  STATUS   ROLES    AGE     VERSION
lpabon-k8s-1-master   Ready    master   8m12s   v1.19.5
lpabon-k8s-1-node0    Ready    <none>   7m44s   v1.19.5
lpabon-k8s-1-node1    Ready    <none>   7m44s   v1.19.5
lpabon-k8s-1-node2    Ready    <none>   7m45s   v1.19.5

kubeup script

Kubeup uses a container to run vagrant and vagrant-libvirt. For convenience a script called kubeup has been provided.

Use this script to prefix all your vagrant commands. For example:

$ ./kubeup vagrant ssh lpabon-k8s-1-node0