extending kubernetes 2 masters cluster
You can refer to "Scaling up etcd clusters" and the remove/add new member section of the Runtime configuration:
Adding a member is a two step process:
- Add the new member to the cluster via the HTTP members API, the gRPC members API, or the
etcdctl member addcommand.- Start the new member with the new cluster configuration, including a list of the updated members (existing members + the new member).