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import unittest, os, signal, sys, random, time
from commontest import *
from rdiff_backup.log import *
from rdiff_backup import Globals, Main, restore
"""Test consistency by killing rdiff-backup as it is backing up"""
Log.setverbosity(3)
class Local:
"""Hold some local RPaths"""
def get_local_rp(ext):
return RPath(Globals.local_connection, "testfiles/" + ext)
kt1rp = get_local_rp('killtest1')
kt2rp = get_local_rp('killtest2')
kt3rp = get_local_rp('killtest3')
kt4rp = get_local_rp('killtest4')
rpout = get_local_rp('output')
rpout_inc = get_local_rp('output_inc')
rpout1 = get_local_rp('restoretarget1')
rpout2 = get_local_rp('restoretarget2')
rpout3 = get_local_rp('restoretarget3')
rpout4 = get_local_rp('restoretarget4')
rpout5 = get_local_rp('restoretarget5')
back1 = get_local_rp('backup1')
back2 = get_local_rp('backup2')
back3 = get_local_rp('backup3')
back4 = get_local_rp('backup4')
back5 = get_local_rp('backup5')
class TimingError(Exception):
"""Indicates timing error - process killed too soon or too late"""
pass
class ProcessFuncs(unittest.TestCase):
"""Subclassed by Resume and NoResume"""
def delete_tmpdirs(self):
"""Remove any temp directories created by previous tests"""
assert not os.system(MiscDir + '/myrm testfiles/output* '
'testfiles/restoretarget* testfiles/vft_out '
'timbar.pyc testfiles/vft2_out')
def exec_rb(self, time, wait, *args):
"""Run rdiff-backup return pid. Wait until done if wait is true"""
arglist = ['python', '../rdiff-backup', '-v3']
if time:
arglist.append("--current-time")
arglist.append(str(time))
arglist.extend(args)
print "Running ", arglist
if wait: return os.spawnvp(os.P_WAIT, 'python', arglist)
else: return os.spawnvp(os.P_NOWAIT, 'python', arglist)
def exec_and_kill(self, min_max_pair, backup_time, arg1, arg2):
"""Run rdiff-backup, then kill and run again
Kill after a time between mintime and maxtime. First process
should not terminate before maxtime.
"""
mintime, maxtime = min_max_pair
pid = self.exec_rb(backup_time, None, arg1, arg2)
time.sleep(random.uniform(mintime, maxtime))
if os.waitpid(pid, os.WNOHANG)[0] != 0:
# Timing problem, process already terminated (max time too big?)
return -1
os.kill(pid, self.killsignal)
while 1:
pid, exitstatus = os.waitpid(pid, os.WNOHANG)
if pid:
assert exitstatus != 0
break
time.sleep(0.2)
print "---------------------- killed"
def create_killtest_dirs(self):
"""Create testfiles/killtest? directories
They are similar to the testfiles/increment? directories but
have more files in them so they take a significant time to
back up.
"""
def copy_thrice(input, output):
"""Copy input directory to output directory three times"""
assert not os.system("cp -a %s %s" % (input, output))
assert not os.system("cp -a %s %s/killtesta" % (input, output))
assert not os.system("cp -a %s %s/killtestb" % (input, output))
if (Local.kt1rp.lstat() and Local.kt2rp.lstat() and
Local.kt3rp.lstat() and Local.kt4rp.lstat()): return
assert not os.system("rm -rf testfiles/killtest?")
for i in [1, 2, 3, 4]:
copy_thrice("testfiles/increment%d" % i,
"testfiles/killtest%d" % i)
def runtest_sequence(self, total_tests,
exclude_rbdir, ignore_tmp, compare_links,
stop_on_error = None):
timing_problems, failures = 0, 0
for i in range(total_tests):
try:
result = self.runtest(exclude_rbdir, ignore_tmp, compare_links)
except TimingError, te:
print te
timing_problems += 1
continue
if result != 1:
if stop_on_error: assert 0, "Compare Failure"
else: failures += 1
print total_tests, "tests attempted total"
print "%s setup problems, %s failures, %s successes" % \
(timing_problems, failures,
total_tests - timing_problems - failures)
class KillTest(ProcessFuncs):
"""Test rdiff-backup by killing it, recovering, and then comparing"""
killsignal = signal.SIGTERM
# The following are lower and upper bounds on the amount of time
# rdiff-backup is expected to run. They are used to determine how
# long to wait before killing the rdiff-backup process
time_pairs = [(0.0, 3.7), (0.0, 5.7), (0.0, 3.0), (0.0, 5.0), (0.0, 5.0)]
def setUp(self):
"""Create killtest? and backup? directories if necessary"""
Local.kt1rp.setdata()
Local.kt2rp.setdata()
Local.kt3rp.setdata()
Local.kt4rp.setdata()
if (not Local.kt1rp.lstat() or not Local.kt2rp.lstat() or
not Local.kt3rp.lstat() or not Local.kt4rp.lstat()):
self.create_killtest_dirs()
def testTiming(self):
"""Run each rdiff-backup sequence 10 times, printing average time"""
time_list = [[], [], [], [], []] # List of time lists
iterations = 10
def run_once(current_time, input_rp, index):
start_time = time.time()
self.exec_rb(current_time, 1, input_rp.path, Local.rpout.path)
time_list[index].append(time.time() - start_time)
for i in range(iterations):
self.delete_tmpdirs()
run_once(10000, Local.kt3rp, 0)
run_once(20000, Local.kt1rp, 1)
run_once(30000, Local.kt3rp, 2)
run_once(40000, Local.kt3rp, 3)
run_once(50000, Local.kt3rp, 4)
for i in range(len(time_list)):
print "%s -> %s" % (i, " ".join(map(str, time_list[i])))
def mark_incomplete(self, curtime, rp):
"""Check the date of current mirror
Return 1 if there are two current_mirror incs and last one has
time curtime. Return 0 if only one with time curtime, and
then add a current_mirror marker. Return -1 if only one and
time is not curtime.
"""
rbdir = rp.append_path("rdiff-backup-data")
inclist = restore.get_inclist(rbdir.append("current_mirror"))
assert 1 <= len(inclist) <= 2, str(map(lambda x: x.path, inclist))
inc_date_pairs = map(lambda inc: (inc.getinctime(), inc), inclist)
inc_date_pairs.sort()
assert inc_date_pairs[-1][0] == curtime, \
(inc_date_pairs[-1][0], curtime)
if len(inclist) == 2: return 1
if inc_date_pairs[-1][0] == curtime:
result = 0
marker_time = curtime - 10000
else:
assert inc_date_pairs[-1][0] == curtime - 10000
marker_time = curtime
result = -1
cur_mirror_rp = rbdir.append("current_mirror.%s.data" %
(Time.timetostring(marker_time),))
assert not cur_mirror_rp.lstat()
cur_mirror_rp.touch()
return result
def testTerm(self):
"""Run rdiff-backup, termining and regressing each time
Because rdiff-backup must be killed, the timing should be
updated
"""
count, killed_too_soon, killed_too_late = 5, [0]*4, [0]*4
self.delete_tmpdirs()
# Back up killtest3 first because it is big and the first case
# is kind of special (there's no incrementing, so different
# code)
self.exec_rb(10000, 1, Local.kt3rp.path, Local.rpout.path)
assert CompareRecursive(Local.kt3rp, Local.rpout)
def cycle_once(min_max_time_pair, curtime, input_rp, old_rp):
"""Backup input_rp, kill, regress, and then compare"""
time.sleep(1)
self.exec_and_kill(min_max_time_pair, curtime,
input_rp.path, Local.rpout.path)
result = self.mark_incomplete(curtime, Local.rpout)
assert not self.exec_rb(None, 1, '--check-destination-dir',
Local.rpout.path)
assert CompareRecursive(old_rp, Local.rpout, compare_hardlinks = 0)
return result
# Keep backing kt1rp, and then regressing to kt3rp. Then go to kt1rp
for i in range(count):
result = cycle_once(self.time_pairs[1], 20000,
Local.kt1rp, Local.kt3rp)
if result == 0: killed_too_late[0] += 1
elif result == -1: killed_too_soon[0] += 1
self.exec_rb(20000, 1, Local.kt1rp.path, Local.rpout.path)
# Now keep regressing from kt2rp, only staying there at the end
for i in range(count):
result = cycle_once(self.time_pairs[2], 30000,
Local.kt2rp, Local.kt1rp)
if result == 0: killed_too_late[1] += 1
elif result == -1: killed_too_soon[1] += 1
self.exec_rb(30000, 1, Local.kt2rp.path, Local.rpout.path)
# Now keep regressing from kt2rp, only staying there at the end
for i in range(count):
result = cycle_once(self.time_pairs[3], 40000,
Local.kt3rp, Local.kt2rp)
if result == 0: killed_too_late[2] += 1
elif result == -1: killed_too_soon[2] += 1
self.exec_rb(40000, 1, Local.kt3rp.path, Local.rpout.path)
# Now keep regressing from kt2rp, only staying there at the end
for i in range(count):
result = cycle_once(self.time_pairs[4], 50000,
Local.kt4rp, Local.kt3rp)
if result == 0: killed_too_late[3] += 1
elif result == -1: killed_too_soon[3] += 1
print "Killed too soon out of %s: %s" % (count, killed_too_soon)
print "Killed too late out of %s: %s" % (count, killed_too_late)
if __name__ == "__main__": unittest.main()
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