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[Johannes Erdfelt <1362799@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Nova used to allow a hard reboot when an instance is already being soft
rebooted. However, with commit cc0be157d005c5588fe5db779fc30fefbf22b44d,
this is no longer allowed.

This is because two new task states were introduced, REBOOT_PENDING and
REBOOT_STARTED (and corresponding values for hard reboots). A soft
reboot now spends most of it's time in REBOOT_STARTED instead of
REBOOTING.

REBOOT_PENDING and REBOOT_STARTED were not added to the
@check_instance_state decorator. As a result, an attempt to hard reboot
an instance which is stuck trying to do a soft reboot will now fail with
an InstanceInvalidState exception.

This provides a poor user experience since a reboot is often attempted
for instances that aren't responsive. A soft reboot is not guaranteed to
work even if the system is responsive. The soft reboot prevents a hard
reboot from being performed.

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1362799

Title:
  Hard reboot escalation regression

Status in OpenStack Compute (Nova):
  New

Bug description:
  Nova used to allow a hard reboot when an instance is already being
  soft rebooted. However, with commit
  cc0be157d005c5588fe5db779fc30fefbf22b44d, this is no longer allowed.

  This is because two new task states were introduced, REBOOT_PENDING
  and REBOOT_STARTED (and corresponding values for hard reboots). A soft
  reboot now spends most of it's time in REBOOT_STARTED instead of
  REBOOTING.

  REBOOT_PENDING and REBOOT_STARTED were not added to the
  @check_instance_state decorator. As a result, an attempt to hard
  reboot an instance which is stuck trying to do a soft reboot will now
  fail with an InstanceInvalidState exception.

  This provides a poor user experience since a reboot is often attempted
  for instances that aren't responsive. A soft reboot is not guaranteed
  to work even if the system is responsive. The soft reboot prevents a
  hard reboot from being performed.

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