Recently, in my testing environment i forgot the root password. I did the following step to reset password:

-Restart the vrops node

-Edit the Boot option “init=/bin/bash”

Boot Options vga=0x311 elevator=noop noexec=on nousb audit=1 init=/bin/bash

-Once system boots, type below command:

"passwd root"

It will prompt for new password. Provide the new password and reboot the system!!!