def attach_volume(core_identity,
driver,
instance_id,
volume_id,
device_location=None,
mount_location=None,
*args,
**kwargs):
"""
Attach (And mount, if possible) volume to instance
device_location and mount_location assumed if empty
"""
logger.info("Attach: %s --> %s" % (volume_id, instance_id))
logger.info("device_location:%s, mount_location: %s" %
(device_location, mount_location))
try:
init_task = attach_task.si(driver.__class__, driver.provider,
driver.identity, instance_id, volume_id,
device_location)
mount_chain = _get_mount_chain(core_identity, driver, instance_id,
volume_id, device_location,
mount_location)
init_task.link(mount_chain)
print_task_chain(init_task)
init_task.apply_async()
except Exception as e:
raise VolumeMountConflict(instance_id, volume_id)
return mount_location
def attach_volume_task(core_identity, driver, instance_id, volume_id, device_location=None,
mount_location=None, *args, **kwargs):
"""
Attach (And mount, if possible) volume to instance
device_location and mount_location assumed if empty
"""
logger.info("Attach: %s --> %s" % (volume_id, instance_id))
logger.info("device_location:%s, mount_location: %s"
% (device_location, mount_location))
try:
attach_volume = attach_task.si(
driver.__class__, driver.provider, driver.identity,
instance_id, volume_id, device_location)
if not hasattr(driver, 'deploy_to'):
# Do not attempt to mount if we don't have sh access
attach_volume.apply_async()
# No mount location, return None
return None
mount_chain = _get_mount_chain(core_identity, driver, instance_id, volume_id,
device_location, mount_location)
attach_volume.link(mount_chain)
attach_volume.apply_async()
except Exception as e:
raise VolumeMountConflict(instance_id, volume_id)
return mount_location
def mount_volume_task(core_identity,
driver,
instance_id,
volume_id,
device=None,
mount_location=None,
*args,
**kwargs):
"""
Mount, if possible, the volume to instance
Device and mount_location assumed if empty
"""
logger.info("Mount ONLY: %s --> %s" % (volume_id, instance_id))
logger.info("device_location:%s --> mount_location: %s" %
(device, mount_location))
try:
if not hasattr(driver, 'deploy_to'):
# Do not attempt to mount if we don't have sh access
return None
vol = driver.get_volume(volume_id)
existing_mount = vol.extra.get('metadata', {}).get('mount_location')
if existing_mount:
raise VolumeMountConflict(
instance_id, volume_id,
"Volume already mounted at %s. Run 'unmount_volume' first!" %
existing_mount)
if not driver._connection.ex_volume_attached_to_instance(
vol, instance_id):
raise VolumeMountConflict(
instance_id, volume_id, "Cannot mount volume %s "
"-- Not attached to instance %s" % (volume_id, instance_id))
mount_chain = _get_mount_chain(core_identity, driver, instance_id,
volume_id, device, mount_location)
mount_chain.apply_async()
except VolumeMountConflict:
raise
except Exception as e:
logger.exception("Exc occurred")
raise VolumeMountConflict(instance_id, volume_id)
return mount_location
def mount_volume(core_identity,
driver,
instance_id,
volume_id,
device=None,
mount_location=None,
*args,
**kwargs):
"""
This task-caller will:
- verify that volume is not already mounted
- raise exceptions that can be handled _prior_ to running async tasks
- create an async "task chain" and execute if all pre-conditions are met.
"""
logger.info("Mount ONLY: %s --> %s" % (volume_id, instance_id))
logger.info("device_location:%s --> mount_location: %s" %
(device, mount_location))
try:
vol = driver.get_volume(volume_id)
existing_mount = vol.extra.get('metadata', {}).get('mount_location')
if existing_mount:
raise VolumeMountConflict(
instance_id, volume_id,
"Volume already mounted at %s. Run 'unmount_volume' first!" %
existing_mount)
if not driver._connection.ex_volume_attached_to_instance(
vol, instance_id):
raise VolumeMountConflict(
instance_id, volume_id, "Cannot mount volume %s "
"-- Not attached to instance %s" % (volume_id, instance_id))
mount_chain = _get_mount_chain(core_identity, driver, instance_id,
volume_id, device, mount_location)
mount_chain.apply_async()
except VolumeMountConflict:
raise
except Exception as e:
logger.exception("Exc occurred")
raise VolumeMountConflict(instance_id, volume_id)
return mount_location
def unmount_volume_task(driver, instance_id, volume_id, *args, **kwargs):
try:
logger.info("UN-Mount ONLY: %s --> %s" % (volume_id, instance_id))
if not hasattr(driver, 'deploy_to'):
raise Exception("Cannot mount "
"-- Driver does not have a deploy_to method")
# Only attempt to umount if we have sh access
vol = driver.get_volume(volume_id)
if not driver._connection.ex_volume_attached_to_instance(
vol, instance_id):
raise VolumeMountConflict("Cannot unmount volume %s "
"-- Not attached to instance %s" %
(volume_id, instance_id))
umount_chain = _get_umount_chain(driver, instance_id, volume_id)
umount_chain.apply_async()
return (True, None)
except Exception as exc:
logger.exception("Exception occurred creating the unmount task")
return (False, exc.message)
def attach_volume_task(driver,
instance_id,
volume_id,
device=None,
mount_location=None,
*args,
**kwargs):
logger.info("P_device - %s" % device)
logger.info("P_mount_location - %s" % mount_location)
try:
attach_task.delay(driver.__class__, driver.provider, driver.identity,
instance_id, volume_id, device).get()
if not hasattr(driver, 'deploy_to'):
#Do not attempt to mount if we don't have sh access
return
check_volume_task.delay(driver.__class__, driver.provider,
driver.identity, instance_id, volume_id).get()
mount_task.delay(driver.__class__, driver.provider, driver.identity,
instance_id, volume_id, mount_location).get()
except Exception, e:
raise VolumeMountConflict(instance_id, volume_id)
def unmount_volume(driver, instance_id, volume_id, *args, **kwargs):
"""
This task-caller will:
- verify that volume is attached
- raise exceptions that can be handled _prior_ to running async tasks
- create an async "task chain" and execute if all pre-conditions are met.
"""
try:
logger.info("UN-Mount ONLY: %s --> %s" % (volume_id, instance_id))
# Only attempt to umount if we have sh access
vol = driver.get_volume(volume_id)
if not driver._connection.ex_volume_attached_to_instance(
vol, instance_id):
raise VolumeMountConflict("Cannot unmount volume %s "
"-- Not attached to instance %s" %
(volume_id, instance_id))
unmount_chain = _get_umount_chain(driver, instance_id, volume_id)
unmount_chain.apply_async()
return (True, None)
except Exception as exc:
logger.exception("Exception occurred creating the unmount task")
return (False, exc.message)
