A pair of ansible scripts to setup a kubernetes cluster. Tested on Ubuntu 20 TLS.
This is the minimal setup for a complete highly available "production" cluster.
The playbooks can be copy/pasted into your own ansible repo and built upon.
- 3 master nodes (2 CPU*, 2 GB memory)
- 1 worker nodes (2 CPU*, 1 GB memory)
- ansible (
apt-get install ansible)
[*] Kubernetes CLI will refuse to run on a machine with less than 2 CPU.
Adjust the ansible inventory inventory/static.txt with your hosts. The default expects kubeN.home/workerN.home with account user:user.
ansible-playbook setup.yml: Prepare the hosts, download docker and kubernetes command line tools
ansible-playbook master.yml: Setup the kubernetes master nodes.
ansible-playbook nodes.yml: Setup the kubernetes worker nodes.
It's possible to add master or worker nodes. Create the node, add to the inventory, rerun the playbook.
To remove a node: kubeadm reset + rm -rf /etc/cni/net.d + kubectl delete node <host>
export KUBECONFIG=/etc/kubernetes/admin.conf
kubectl get nodes
# demo web application
kubectl apply -f https://raw.githubusercontent.com/paulbouwer/hello-kubernetes/master/yaml/hello-kubernetes.yaml
kubectl get pods
kubectl get endpoints
kubectl get service
curl <serviceIP>:80