redis:redis_server/3

redis_server(+ServerName, +Address, +Options) is det: Register a redis server without connecting to it. The ServerName acts as a lazy connection alias. Initially the ServerName default points at localhost:6379 with no connect options. The default server is used for redis/1 and redis/2 and may be changed using this predicate. Options are described with redis_connect/3.
Connections established this way are by default automatically reconnected if the connection is lost for some reason unless a reconnect(false) option is specified.