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#!/usr/bin/python
import os
import sys
import time
from rados import Rados
from rbd import (RBD,
Image,
ImageNotFound,
RBD_FEATURE_EXCLUSIVE_LOCK,
RBD_FEATURE_LAYERING,
RBD_FEATURE_OBJECT_MAP,
RBD_FEATURE_FAST_DIFF,
RBD_FLAG_OBJECT_MAP_INVALID)
POOL_NAME='rbd'
PARENT_IMG_NAME='test_notify_parent'
CLONE_IMG_NAME='test_notify_clone'
CLONE_IMG_RENAME='test_notify_clone2'
IMG_SIZE = 16 << 20
IMG_ORDER = 20
def delete_image(ioctx, img_name):
image = Image(ioctx, img_name)
for snap in image.list_snaps():
snap_name = snap['name']
print("removing snapshot: %s@%s" % (img_name, snap_name))
if image.is_protected_snap(snap_name):
image.unprotect_snap(snap_name)
image.remove_snap(snap_name)
image.close()
print("removing image: %s" % img_name)
RBD().remove(ioctx, img_name)
def safe_delete_image(ioctx, img_name):
try:
delete_image(ioctx, img_name)
except ImageNotFound:
pass
def get_features():
features = os.getenv("RBD_FEATURES")
if features is not None:
features = int(features)
else:
features = int(RBD_FEATURE_EXCLUSIVE_LOCK | RBD_FEATURE_LAYERING |
RBD_FEATURE_OBJECT_MAP | RBD_FEATURE_FAST_DIFF)
assert((features & RBD_FEATURE_EXCLUSIVE_LOCK) != 0)
assert((features & RBD_FEATURE_LAYERING) != 0)
assert((features & RBD_FEATURE_OBJECT_MAP) != 0)
assert((features & RBD_FEATURE_FAST_DIFF) != 0)
return features
def master(ioctx):
print("starting master")
safe_delete_image(ioctx, CLONE_IMG_RENAME)
safe_delete_image(ioctx, CLONE_IMG_NAME)
safe_delete_image(ioctx, PARENT_IMG_NAME)
features = get_features()
RBD().create(ioctx, PARENT_IMG_NAME, IMG_SIZE, IMG_ORDER, old_format=False,
features=features)
with Image(ioctx, PARENT_IMG_NAME) as image:
image.create_snap('snap1')
image.protect_snap('snap1')
features = features & ~(RBD_FEATURE_FAST_DIFF)
RBD().clone(ioctx, PARENT_IMG_NAME, 'snap1', ioctx, CLONE_IMG_NAME,
features=features)
with Image(ioctx, CLONE_IMG_NAME) as image:
print("acquiring exclusive lock")
offset = 0
data = os.urandom(512)
while offset < IMG_SIZE:
image.write(data, offset)
offset += (1 << IMG_ORDER)
image.write(b'1', IMG_SIZE - 1)
assert(image.is_exclusive_lock_owner())
print("waiting for slave to complete")
while image.is_exclusive_lock_owner():
time.sleep(5)
safe_delete_image(ioctx, CLONE_IMG_RENAME)
safe_delete_image(ioctx, CLONE_IMG_NAME)
delete_image(ioctx, PARENT_IMG_NAME)
print("finished")
def slave(ioctx):
print("starting slave")
while True:
try:
with Image(ioctx, CLONE_IMG_NAME) as image:
if (image.list_lockers() != [] and
image.read(IMG_SIZE - 1, 1) == b'1'):
break
except Exception:
pass
print("detected master")
print("rename")
RBD().rename(ioctx, CLONE_IMG_NAME, CLONE_IMG_RENAME);
with Image(ioctx, CLONE_IMG_RENAME) as image:
print("flatten")
image.flatten()
assert(not image.is_exclusive_lock_owner())
print("resize")
image.resize(IMG_SIZE // 2)
assert(not image.is_exclusive_lock_owner())
assert(image.stat()['size'] == IMG_SIZE // 2)
print("create_snap")
image.create_snap('snap1')
assert(not image.is_exclusive_lock_owner())
assert(any(snap['name'] == 'snap1'
for snap in image.list_snaps()))
print("protect_snap")
image.protect_snap('snap1')
assert(not image.is_exclusive_lock_owner())
assert(image.is_protected_snap('snap1'))
print("unprotect_snap")
image.unprotect_snap('snap1')
assert(not image.is_exclusive_lock_owner())
assert(not image.is_protected_snap('snap1'))
print("rename_snap")
image.rename_snap('snap1', 'snap1-new')
assert(not image.is_exclusive_lock_owner())
assert(any(snap['name'] == 'snap1-new'
for snap in image.list_snaps()))
print("remove_snap")
image.remove_snap('snap1-new')
assert(not image.is_exclusive_lock_owner())
assert(list(image.list_snaps()) == [])
print("update_features")
assert((image.features() & RBD_FEATURE_OBJECT_MAP) != 0)
image.update_features(RBD_FEATURE_OBJECT_MAP, False)
assert(not image.is_exclusive_lock_owner())
assert((image.features() & RBD_FEATURE_OBJECT_MAP) == 0)
image.update_features(RBD_FEATURE_OBJECT_MAP, True)
assert(not image.is_exclusive_lock_owner())
assert((image.features() & RBD_FEATURE_OBJECT_MAP) != 0)
assert((image.flags() & RBD_FLAG_OBJECT_MAP_INVALID) != 0)
print("rebuild object map")
image.rebuild_object_map()
assert(not image.is_exclusive_lock_owner())
assert((image.flags() & RBD_FLAG_OBJECT_MAP_INVALID) == 0)
print("write")
data = os.urandom(512)
image.write(data, 0)
assert(image.is_exclusive_lock_owner())
print("finished")
def main():
if len(sys.argv) != 2 or sys.argv[1] not in ['master', 'slave']:
print("usage: %s: [master/slave]" % sys.argv[0])
sys.exit(2)
rados = Rados(conffile='')
rados.connect()
ioctx = rados.open_ioctx(POOL_NAME)
if sys.argv[1] == 'master':
master(ioctx)
else:
slave(ioctx)
rados.shutdown()
if __name__ == "__main__":
main()
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