assuming `localhost` is the address of the cluster leader. If you do not do this the leader will continually attempt to communicate with that node. **Note that the cluster must be functional -- there must still be an operational leader -- for this removal to be successful**. If, after a node failure, a given cluster does not have a quorum of nodes still running, you must bring back the failed node. Any attempt to remove it will fail as there will be no Leader to respond to the node-removal request.
where `host` is any node in the cluster. If you do not remove a failed node the lLader will continually attempt to communicate with that node. **Note that the cluster must be functional -- there must still be an operational Leader -- for this removal to be successful**. If, after a node failure, a given cluster does not have a quorum of nodes still running, you must bring back the failed node. Any attempt to remove it will fail as there will be no Leader to respond to the node-removal request.
If you cannot bring sufficient nodes back online such that the cluster can elect a leader, follow the instructions in the section titled _Dealing with failure_.