mule/node

Stable node identity for a Mule instance — the node column written into mule_peers and the value compared in the leader-election upsert’s returning (node = $self).

In a distributed BEAM the identity is the node name (e.g. mule@10.0.0.1), so two real nodes sharing a database naturally differ. Out of distribution erlang:node/0 is nonode@nohost for every process, so a bare node name could not tell two single-VM instances apart; we append the caller-supplied instance seed (the Mule instance name). The seed must be fixed once per instance at mule.start and threaded through — deriving it fresh inside the peer actor would change the identity on a restart, leaving the restarted peer unable to match (and renew) the mule_peers row it already owns until the lease expired.

pub fn identity(instance_seed instance_seed: String) -> String