samuelwilliams / ansible-deploy-kubernetes

Deploy Kubernetes on Centos8

Ansible Playbook: Deploy a Kubernetes cluster

Requirements

• At least three servers running Centos8 (1x kube_master and 2x kube_workers).
• All machines have their hosts file updated to include the hostnames of all other machines.
• The Ansible host-patterns are configured as:
  • [kube_nodes] - This will contain all the Kubernetes nodes (master and workers).
  • [kube_workers] - This will contain the Kubernetes worker nodes.
  • [kube_master] - This will contain the Kubernetes master node(s).

Post deployment

On the master node, run the command (as root) kubeadm init --pod-network-cidr=10.244.0.0/16, from there, you should be given the token for the worker nodes to join the cluster.

To add a pod network (here I am using Flanel), run the command (as root) kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml.

You can set your nodes to the worker node role using the command: for i in {1..4}; do kubectl label node kube0$i node-role.kubernetes.io/worker=worker; done