Kubernetes Cookbook - Second Edition

kubespray

On the other hand, if you're using kubespray to provision your servers, kubespray supports multi-node etcd natively. What you need to do is add multiple nodes in the etcd section in the configuration file (inventory.cfg):

# cat inventory/inventory.cfgmy-master-1 ansible_ssh_host=<master_ip>my-node-1 ansible_ssh_host=<node_ip>my-etcd-1 ansible_ssh_host=<etcd1_ip>my-etcd-2 ansible_ssh_host=<etcd2_ip>my-etcd-3 ansible_ssh_host=<etcd3_ip>[kube-master]my-master-1[etcd]my-etcd-1my-etcd-2my-etcd-3[kube-node]my-master-1my-node-1

Then you are good to provision a cluster with three-node etcd:

// provision a cluster $ ansible-playbook -b -i inventory/inventory.cfg cluster.yml

After the ansible playbook is launched, it will configure the role, ...