本指令碼通過判斷是否為周一來執行完全備份或增量備份,需提前放到計畫任務中每天執行,實現周一完全備份,之後每天增量備份的功能.具體**實現如下
#!/root/bin/python
from time import strftime
import os
import tarfile
import hashlib
import pickle
def check_md5(fname):
m = hashlib.md5(
) with open(fname,
'rb'
) as fobj:
while 1:
data = fobj.read(4096)
if not data:
break
m.update(
data
)return m.hexdigest(
)def full_backup(src,dst,md5file):
fname = os.path.basename(src)
fname = '%s_full_%s.tar.gz'
%(fname,strftime(
'%y%m%d'))
fname = os.path.join(dst,fname)
tar = tarfile.open(fname,
'w:gz'
) tar.add(src)
tar.close(
) md5dict =
for path,folders,files in os.walk(src):
for file in files:
key = os.path.join(path,file)
md5dict[key] = check_md5(key)
with open(md5file,
'wb'
) as fobj:
pickle.dump(md5dict,fobj)
def incr_backup(src,dst,md5file):
fname = os.path.basename(src)
fname = '%s_incr_%s.tar.gz'
%(fname,strftime(
'%y%m%d'))
fname = os.path.join(dst,fname)
md5dict =
for path,folders,files in os.walk(src):
for file in files:
key = os.path.join(path,file)
md5dict[key] = check_md5(key)
with open(md5file,
'rb'
) as fobj:
old_md5 = pickle.load(fobj)
tar = tarfile.open(fname,
'w:gz'
)for key in md5dict:
if old_md5.get(key)
!= md5dict[key]:
tar.add(key)
tar.close(
) with open(md5file,
'wb'
) as fobj:
pickle.dump(md5dict,fobj)
if __name__ == '__main__':
src = '/tmp/demo/security'
dst = '/tmp/demo/backup'
md5file = '/tmp/demo/backup/md5.data'
if strftime(
'%a'
) == 'mon':
full_backup(src,dst,md5file)
else:
incr_backup(src,dst,md5file)
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