def delete_volume_from_helper(volume, helper_vm):
"""Delete a volume that has been attached to a helper VM.
This special-purpose function should be called only by the dispatcher, when
we are notified that a detached volume has been attached to a helper VM.
"""
if not helper_vm.helper:
raise faults.BadRequest("Server %s is not a helper server" %
helper_vm.backend_vm_id)
log.debug("Attempting to delete volume '%s' from helper server '%s'",
volume.id, helper_vm.id)
server_attachments.delete_volume(helper_vm, volume)
log.info("Deleting volume '%s' from server '%s', job: %s",
volume.id, helper_vm.id, volume.backendjobid)
def delete_volume_from_helper(volume, helper_vm):
"""Delete a volume that has been attached to a helper VM.
This special-purpose function should be called only by the dispatcher, when
we are notified that a detached volume has been attached to a helper VM.
"""
if not helper_vm.helper:
raise faults.BadRequest("Server %s is not a helper server" %
helper_vm.backend_vm_id)
log.debug("Attempting to delete volume '%s' from helper server '%s'",
volume.id, helper_vm.id)
server_attachments.delete_volume(helper_vm, volume)
log.info("Deleting volume '%s' from server '%s', job: %s",
volume.id, helper_vm.id, volume.backendjobid)
def delete_volume_from_helper(volume, helper_vm, atomic_context=None):
"""Delete a volume that has been attached to a helper VM.
This special-purpose function should be called only by the dispatcher, when
we are notified that a detached volume has been attached to a helper VM.
"""
if not helper_vm.helper:
raise faults.BadRequest("Server %s is not a helper server" %
helper_vm.backend_vm_id)
log.debug("Attempting to delete volume '%s' from helper server '%s'",
volume.id, helper_vm.id)
# XXX: If another delete is already served, the helper_vm has a pending
# task which prohibits the code in server_command to issue another action
server_attachments.delete_volume(helper_vm, volume, atomic_context)
log.info("Deleting volume '%s' from server '%s', job: %s",
volume.id, helper_vm.id, volume.backendjobid)
def delete(volume_id, credentials, atomic_context=None):
"""Delete a Volume.
The canonical way of deleting a volume is to send a command to Ganeti to
remove the volume from a specific server. There are two cases however when
a volume may not be attached to a server:
* Case 1: The volume has been created only in DB and was never attached to
a server. In this case, we can simply mark the volume as deleted without
using Ganeti to do so.
* Case 2: The volume has been detached from a VM. This means that there are
still data in the storage backend. Thus, in order to delete the volume
safely, we must attach it to a helper VM, thereby handing the delete action
to the dispatcher.
"""
volume = util.get_volume(credentials,
volume_id, for_update=True, non_deleted=True)
server_id = volume.machine_id
if server_id is not None:
server = get_vm(server_id)
server_attachments.delete_volume(server, volume, atomic_context)
log.info("Deleting volume '%s' from server '%s', job: %s",
volume.id, server_id, volume.backendjobid)
elif volume.backendjobid is None:
# Case 1: Uninitialized volume
if volume.status not in ("AVAILABLE", "ERROR"):
raise faults.BadRequest("Volume is in invalid state: %s" %
volume.status)
log.debug("Attempting to delete uninitialized volume %s.", volume)
util.mark_volume_as_deleted(volume, immediate=True)
quotas.issue_and_accept_commission(volume, action="DESTROY",
atomic_context=atomic_context)
log.info("Deleting uninitialized volume '%s'", volume.id)
else:
# Case 2: Detached volume
log.debug("Attempting to delete detached volume %s", volume)
delete_detached_volume(volume, atomic_context)
log.info("Deleting volume '%s' from helper server '%s', job: %s",
volume.id, volume.machine.id, volume.backendjobid)
return volume