python实现远程文件自动打包并下载

一 点睛

在Linux系统集群运营当中，时常需要批量远程执行Linux命令，并且双向同步文件的操作。

本示例通过使用spawn（）方法执行ssh、scp 命令的思路来实现。

二 代码

import pexpect
import sys

ip="192.168.0.104"
user="root"
passwd="123456"
target_file="/data/test.txt"

child = pexpect.spawn('/usr/bin/ssh', [user+'@'+ip])
fout = file('mylog.txt','w')
child.logfile = fout

try:
    child.expect('password: ')
    child.sendline(passwd)
    child.expect('#')
    child.sendline('tar -czf /data/test.tar.gz '+target_file)
    child.expect('#')
    print child.before
    child.sendline('exit')
    fout.close()
except pexpect.EOF:
    print "expect EOF1"
except pexpect.TIMEOUT:
    print "expect TIMEOUT1"

child = pexpect.spawn('/usr/bin/scp', [user+'@'+ip+':/data/test.tar.gz','/home'])
fout = file('mylog.txt','a')
child.logfile = fout
try:
    child.expect('(?i)password')
    child.sendline(passwd)
    child.expect(pexpect.EOF)
except pexpect.EOF:
    print "expect EOF2"
except pexpect.TIMEOUT:
    print "expect TIMEOUT2"

三 运行

[root@localhost pymaintain]# python 5_3_3.py
tar -czf /data/test.tar.gz /data/test.txt
tar: Removing leading `/' from member names

四 日志输出

[root@localhost pymaintain]# cat mylog.txt 
\S
Kernel \r on an \m
[email protected]'s password: 123456

Last login: Sun Feb 24 16:20:25 2019 from 192.168.0.120
hello cakin24!
[root@slave2 ~]# tar -czf /data/test.tar.gz /data/test.txt
tar -czf /data/test.tar.gz /data/test.txt
tar: Removing leading `/' from member names
[root@slave2 ~]# exit
\S
Kernel \r on an \m
[email protected]'s password: 123456

test.tar.gz                                   100%  115    40.3KB/s   00:00