Procedure bellow identify Controller which has RouterDSA in active state and
shutdown/startup this Controller ( controller-1 in particular case).
Then log into conntroller-1 and restart pcs cluster on particular Controller,
afterwards runs `pacemaker resource cleanup` for several resources what
results bringing back cluster nodes in proper status
Complete text maybe seen here: –
http://bderzhavets.blogspot.com/2016/08/emulation-rdo-triple0-quickstart-ha.html
