How to arrange selection of "master" node.js server using Redis?

Question

Redis

Hello. Task: when running n'th number of servers at the same time, one of them should become a message generator, the rest process them. There can be only one generator. When the generator "falls", any of the handlers replaces it. All communication must take place through Redis.
The first thing that comes to mind: at startup, everyone writes to the SETNX generator <ip> radish . Then, according to the timer, everyone checks the value of the generator key and if it is equal to its ip, the server becomes a generator.