Set _need_rewind to True if the node was previously known as a master

patroni/ha.py

@@ -400,6 +400,7 @@ class Ha(object):
                                    'following new leader after trying and failing to obtain lock')
         else:
             # when we are doing manual failover there is no guaranty that new leader is ahead of any other node
+            # node tagged as nofailover can be ahead of the new leader either, but it is always excluded from elections
             need_rewind = bool(self.cluster.failover) or self.patroni.nofailover
             if need_rewind:
                 sleep(2)  # Give a time to somebody to take the leader lock

patroni/postgresql.py

@@ -774,6 +774,8 @@ class Postgresql(object):
             self._need_rewind = False
             if self.is_running():
                 return
+        elif change_role:
+            self._need_rewind = True
 
         self._need_rewind &= bool(leader and leader.conn_url) and self.can_rewind