Is there any difference between performing an OpenStack soft reboot instance through the web interface Horizon and SSH into the instance and perform sudo reboot?

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1 Answer 1


OpenStack Dashboard Server Reboot

Use this function to perform either a soft or hard reboot of a server. With a soft reboot, the operating system is signaled to restart, which allows for a graceful shutdown of all processes. A hard reboot is the equivalent of power cycling the server. The virtualization platform should ensure that the reboot action has completed successfully even in cases in which the underlying domain/VM is paused or halted/stopped.

Nova Server Reboot

  • OpenStack soft reboot:

    $ nova reboot INSTANCE
  • OpenStack hard reboot:

    $ nova reboot --hard INSTANCE

Server Reboot

If you perform sudo reboot OpenStack will not know whether the reboot was intentional...

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