You can run a fault tolerant etcd cluster by having etcd backed by multiple machines. You can find more information about it under the “Deployments” section in the FAQ page: https://etcd.io/docs/v3.4.0/faq/ 2


Short answer is no. There are two ranks in elastic: 1. node_rank (its called GROUP_RANK), and 2. worker_rank (RANK). We don’t allow the ranks to be manually overridden because “sticky” ranks and elasticity do not play well together. Could you describe the use-case you have in mind? This way I can brainstorm a way to make things work without hardcoding ranks to specific nodes.