def perform_synthesis(self):
from tool import decomp_overlay
Log = open("/dev/null", "w+b")
#Log = sys.stdout
meta = Const.OVERLAY_MEMA_FILE
base_disk = Const.BASE_DISK_PATH
overlay_filename = NamedTemporaryFile(prefix="cloudlet-overlay-file-")
meta_info = decomp_overlay(meta, overlay_filename.name, print_out=Log)
# recover modified VM
modified_img, modified_mem, fuse, delta_proc, fuse_thread = \
cloudlet.recover_launchVM(base_disk, meta_info, overlay_filename.name, log=Log)
delta_proc.start()
fuse_thread.start()
delta_proc.join()
fuse_thread.join()
residue_img = os.path.join(fuse.mountpoint, 'disk', 'image')
residue_mem = os.path.join(fuse.mountpoint, 'memory', 'image')
# compare hash
import tool
print "[INFO] Modified disk is recovered at %s" % residue_img
print "[INFO] Modified memory is recovered at %s" % residue_mem
print "getting sha1 for comparison"
sha1_modified_img = tool.sha1_fromfile(residue_img)
sha1_modified_mem = tool.sha1_fromfile(residue_mem)
sha1_original_mem = tool.sha1_fromfile(Const.MODIFIED_MEMORY_SNAPSHOT)
fuse.terminate()
self.assertEqual(sha1_original_mem, sha1_modified_mem, "recover memory should be same with original")
sys.path.append(library_path)
import tool
#extract hash
base_disk_hash = tool.extract_hashlist(open(base_disk, "rb"))
base_mem_hash = tool.extract_hashlist(open(base_mem, "rb"))
overlay_mem_hash = tool.extract_hashlist(open(overlay_mem, "rb"))
#delta
hash_for_disk = [(1, base_disk, base_disk_hash), (2, base_mem, base_mem_hash), (3, overlay_mem, overlay_mem_hash)]
hash_for_mem = [(1, base_disk, base_disk_hash), (2, base_mem, base_mem_hash)]
disk_deltalist = tool.get_delta(open(overlay_disk, "rb"), hash_for_disk)
mem_deltalist = tool.get_delta(open(overlay_mem, "rb"), hash_for_mem)
tool.deltalist_to_file(disk_deltalist, overlay_disk+".delta")
tool.deltalist_to_file(mem_deltalist, overlay_mem+".delta")
#merge
recovered_disk = tool.merge_delta(disk_deltalist, hash_for_disk)
recovered_mem = tool.merge_delta(mem_deltalist, hash_for_mem)
open(overlay_disk+".recover", "wb").write(recovered_disk)
open(overlay_mem+".recover", "wb").write(recovered_mem)
#check sanity
original = tool.sha1_fromfile(overlay_disk)
recover = tool.sha1_fromfile(overlay_disk+".recover")
if recover != original:
print "Error, recover failed %s != %s" % (recover, original)
else:
print "Success, recovered %s == %s" % (recover, original)
sys.path.append(library_path)
import tool
#extract hash
base_disk_hash = tool.extract_hashlist(open(base_disk, "rb"))
base_mem_hash = tool.extract_hashlist(open(base_mem, "rb"))
overlay_mem_hash = tool.extract_hashlist(open(overlay_mem, "rb"))
#delta
hash_for_disk = [(1, base_disk, base_disk_hash), (2, base_mem, base_mem_hash), (3, overlay_mem, overlay_mem_hash)]
hash_for_mem = [(1, base_disk, base_disk_hash), (2, base_mem, base_mem_hash)]
disk_deltalist = tool.get_delta(open(overlay_disk, "rb"), hash_for_disk)
mem_deltalist = tool.get_delta(open(overlay_mem, "rb"), hash_for_mem)
tool.deltalist_to_file(disk_deltalist, overlay_disk+".delta")
tool.deltalist_to_file(mem_deltalist, overlay_mem+".delta")
#merge
recovered_disk = tool.merge_delta(disk_deltalist, hash_for_disk)
recovered_mem = tool.merge_delta(mem_deltalist, hash_for_mem)
open(overlay_disk+".recover", "wb").write(recovered_disk)
open(overlay_mem+".recover", "wb").write(recovered_mem)
#check sanity
original = tool.sha1_fromfile(overlay_disk)
recover = tool.sha1_fromfile(overlay_disk+".recover")
if recover != original:
print "Error, recover failed %s != %s" % (recover, original)
else:
print "Success, recovered %s == %s" % (recover, original)
