【python】python 模块学习之--Fabric

基础一：

1. #!/usr/bin/env python
2. from fabric.api import *
4. env.user='root'
5. env.hosts=['218.78.186.162','125.208.12.56']
6. env.passwords={ 'root@218.78.186.162:22':'XXX','root@125.208.12.56:22':'XXXX@0'}
8. @runs_once ####runs_once代表只执行一次
9. def local_task():
10. local("hostname") ####local本地任务，不会ssh远程执行
12. def remote_task():
13. with cd("/tmp/"):
14. run("hostname") ###run 远程命令
16. @task ####task标记只有go函数可以调用remote_task函数
17. def go():
18. remote_task()

测试

1. [root@hostnfsd :/soft/python/pyauto/第七章/fabric]$ fab -f simple1_test.py remote_task ###直接调用remote_task函数失败
3. Warning: Command(s) not found:
4. remote_task
6. Available commands:
8. go
9. [root@hostnfsd :/soft/python/pyauto/第七章/fabric]$ fab -f simple1_test.py local_task ###有task表标识时直接调用local函数失败，meitask时才能直接调用local函数
11. Warning: Command(s) not found:
12. local_task
14. Available commands:
16. go
17. [root@hostnfsd :/soft/python/pyauto/第七章/fabric]$ fab -f simple1_test.py go 通过go函数调用remote_task函数
18. [218.78.186.162] Executing task 'go'
19. [218.78.186.162] run: hostname
20. [218.78.186.162] out: localhost.localdomain
21. [218.78.186.162] out:
23. [125.208.12.56] Executing task 'go'
24. [125.208.12.56] run: hostname
25. [125.208.12.56] out: host-192-168-1-56
26. [125.208.12.56] out:
29. Done.
30. Disconnecting from 218.78.186.162... done.
31. Disconnecting from 125.208.12.56... done.

有时我们希望直接用脚本就可以执行，可以如下更改

1. #!/usr/bin/env python
2. from fabric.api import *
4. env.user='root'
5. env.hosts=['218.78.186.162','125.208.12.56']
6. env.passwords={ 'root@218.78.186.162:22':'ESBecs00','root@125.208.12.56:22':'eRaMUnA612@0'}
8. @runs_once
9. def local_task():
10. local("hostname")
12. def remote_task():
13. with cd("/tmp/"):
14. run("hostname")
18. def go():
    execute(remote_task) ####execute表示在脚本内执行即可
19. execute (local_task)
    go()

直接运行即可

[root@hostnfsd :/soft/python/pyauto/第七章/fabric]$ python simple1_test.py

基础2：

1. #!/usr/bin/env python
2. from fabric.api import *
4. env.user='root'
5. env.hosts=['218.78.186.162','125.208.12.56']
6. env.passwords={ 'root@218.78.186.162:22':'XXX','root@125.208.12.56:22':'XXXX@0'}
8. @runs_once
9. def input_raw():
10. return prompt("please input directory name:",default="/home")
12. def worktask(dirname):
13. run("ls -l "+dirname)
15. @task
16. def go():
17. getdirname = input_raw()
18. worktask(getdirname)

跳板机：

1. #!/usr/bin/env python
2. from fabric.api import *
3. from fabric.context_managers import *
4. from fabric.contrib.console import confirm
6. env.user='root'
7. env.gateway='218.78.186.162'
8. env.hosts=['125.208.12.56']
9. env.passwords={ 'root@218.78.186.162:22':'XX','root@125.208.12.56:22':'XXXX@0'}
13. lpackpath="/home/install/lnmp0.9.tar.gz"
14. rpackpath="/tmp/install"
16. @task
17. def put_task():
18. run("mkdir -p /tmp/install")
19. with settings(warn_only=True):
20. result = put(lpackpath, rpackpath)
21. if result.failed and not confirm("put file failed, Continue[Y/N]?"):
22. abort("Aborting file put task!")
24. @task
25. def run_task():
26. with cd("/tmp/install"):
27. run("tar -zxvf lnmp0.9.tar.gz")
28. run("ls -l")
30. @task
31. def go():
32. put_task()
33. run_task()

有时需要将这些功能模板写到django中，那么我们可以将该功能封装到一个类中

1. #!/usr/bin/env python
2. from fabric.api import *
3. class Student(object):
4. def init(self,user,ip):
5. env.user=user
6. env.hosts=[ip]
7. env.password='XXX'
8. @runs_once
9. def local_task(self):
10. local("hostname")
12. def remote_task(self):
13. vhost=run("df -h")
14. return vhost
16. def yunxing(user,ip):
17. tom=Student(user,ip)
18. print execute(tom.remote_task)
21. yunxing('root','218.78.186.162') ###直接调用该函数传参即可