[Linux-cluster] How to change master node

[GouNiNi]

Hello,

When using quorum device, one node is elected "master" and you can see
  Aug  1 15:36:05 non-master-node qdiskd[8136]: <info> Node 1 is the master
on non-master nodes or 
  Aug  1 15:29:47 master-node qdiskd[8044]: <info> Assuming master role
on master node.

How do you change manually the master node?

The only way I found is to do "service qdiskd restart" on the master node but it's not recommended.

Regards,