self.harness.set_leader(is_leader=False)
relation_id = self.harness.add_relation("prometheus", "mon")
self.harness.add_relation_unit(relation_id, "mon/0")
self.harness.set_leader(is_leader=False)
relation_id = self.harness.add_relation("prometheus", "mon")
self.harness.add_relation_unit(relation_id, "mon/0")