backup script

source_backup.py

#!/usr/bin/python

import os
import time

host_name = 'SBC1'
bak_dir = '/home/backup/'
fn = '{}-{}.tar.xz'.format(host_name, time.strftime("%Y%m%d_%H%M"))

def log(s):
    with open('/var/log/sbc_src_backup.log', 'a') as fp:
        fp.write('{} {}{}'.format(time.asctime(), s, '\n'))


# __main__

os.system("cd /userx/i/vg/; export XZ_DEFAULTS=\"-T 0\"; /usr/bin/tar cJf {} ktp/* --exclude \"xxx/src/lib/linux-3.10.0-1062.el7\"".format(fn))
os.system('mv /userx/i/vg/{} {}'.format(fn, bak_dir))

lst = []
for n in os.listdir(bak_dir):
    if '.tar.xz' == n[-7:]: lst.append(n)
lst.sort()

this_file = os.path.join(bak_dir, fn)
last_file = os.path.join(bak_dir, lst[-1])

if this_file != last_file and os.path.isfile(last_file) and os.path.getsize(last_file) == os.path.getsize(this_file):
    log('same size({}) as {}'.format(os.path.getsize(last_file), last_file))
    log('deleting {}'.format(this_file))
    os.unlink(this_file)
else:
    log('backup complete: {}'.format(this_file))