Kubernetes Cluster using Ansible

This guide covers setting up a Kubernetes cluster using Ansible on CentOS 8 and Ubuntu 23.04.

Prerequisites

• Clone the repository.
• Create multiple VMs or physical servers for one master and several worker nodes. You can use tools like Vagrant for VM creation. See an example here.
• Update the ad_addr in the env_variables file with the IP address of the Kubernetes master node.
• Run the following command to setup the Kubernetes Master node.
• Select the version Centos or Ubuntu.

ansible-playbook setup_master_node.yml

• Once the master node is ready, run the following command to set up the worker nodes.

ansible-playbook setup_worker_nodes.yml

• Once the workers have joined the cluster, run the following command to check the status of the worker nodes.

  mkdir -p $HOME/.kube
  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
  sudo chown $(id -u):$(id -g) $HOME/.kube/config

kubectl get nodes

Additional information

• The IP addresses of the workers and masters added to the /etc/hosts file on all workers and masters as part of the prerequisites.yml playbook, if necessary or in case of DNS issues make sure the addresses have been added to /etc/hosts file.