Kubeclust
Kubeclust sets up a kubernetes 1.20.2 cluster on three VirtualBox virtual machines (one master and two workers) running Ubuntu 20.04 LTS using kubeadm.
Prerequisites
- Virtual environment with Python3
- Virtualbox
- Vagrant
Installation
In the virtual environment, run
$ pip install -r requirements.txt
Create Virtual Machines
Run vagrant up to bring up three virtual machines.
The hostnames and IP addresses of the machines are as follows:
kubemaster — 192.168.99.20
worker1 – 192.168.99.21
worker2 – 192.168.99.22
Create kubernetes cluster
In the virtual environment created earlier, run
$ make cluster
As soon as it is done, you can ssh into kubemaster to see the nodes and the pods in the cluster. They may take a while to get ready.
vagrant@kubemaster:~$ kubectl get nodes
NAME STATUS ROLES AGE VERSION
kubemaster Ready control-plane,master 7m2s v1.20.2
worker1 Ready <none> 6m33s v1.20.2
worker2 Ready <none> 6m33s v1.20.2
vagrant@kubemaster:~$ kubectl get pods --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system calico-kube-controllers-744cfdf676-wnsth 1/1 Running 0 8m5s
kube-system calico-node-6c7cg 1/1 Running 0 8m5s
kube-system calico-node-fpwfs 1/1 Running 0 7m55s
kube-system calico-node-j87dn 1/1 Running 0 7m55s
kube-system coredns-74ff55c5b-6jgb6 1/1 Running 0 8m5s
kube-system coredns-74ff55c5b-9lw2b 1/1 Running 0 8m5s
kube-system etcd-kubemaster 1/1 Running 0 8m19s
kube-system kube-apiserver-kubemaster 1/1 Running 0 8m19s
kube-system kube-controller-manager-kubemaster 1/1 Running 0 8m19s
kube-system kube-proxy-dwfzq 1/1 Running 0 7m55s
kube-system kube-proxy-r7cqp 1/1 Running 0 8m5s
kube-system kube-proxy-wpwg5 1/1 Running 0 7m55s
kube-system kube-scheduler-kubemaster 1/1 Running 0 8m19s
Tear down cluster
$ make clean
This will drain the nodes, make sure that they are empty before shutting them down and reset all kubeadm installed state.