【python】python 模块学习之--Fabric

基础一：

 #!/usr/bin/env python
 from fabric.api import *

 env.user='root'
 env.hosts=['218.78.186.162','125.208.12.56']
 env.passwords={ '[email protected]:22':'XXX','[email protected]:22':'XXXX@0'}

 @runs_once                       ####runs_once代表只执行一次
 def local_task():
     local("hostname")            ####local本地任务，不会ssh远程执行

 def remote_task():
     with cd("/tmp/"):
         run("hostname")          ###run 远程命令

 @task                            ####task标记只有go函数可以调用remote_task函数
 def go():
     remote_task()

测试

 [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

 Warning: Command(s) not found:
     remote_task

 Available commands:

     go
 [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

 Warning: Command(s) not found:
     local_task

 Available commands:

     go
 [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
 [218.78.186.162] Executing task 'go'
 [218.78.186.162] run: hostname
 [218.78.186.162] out: localhost.localdomain
 [218.78.186.162] out:

 [125.208.12.56] Executing task 'go'
 [125.208.12.56] run: hostname
 [125.208.12.56] out: host-192-168-1-56
 [125.208.12.56] out:


 Done.
 Disconnecting from 218.78.186.162... done.
 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

 #!/usr/bin/env python
 from fabric.api import *

 env.user='root'
 env.hosts=['218.78.186.162','125.208.12.56']
 env.passwords={ '[email protected]:22':'ESBecs00','[email protected]:22':'eRaMUnA612@0'}

 @runs_once
 def local_task():
     local("hostname")

 def remote_task():
     with cd("/tmp/"):
         run("hostname")



 def go():     execute(remote_task)           ####execute表示在脚本内执行即可
     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：

 #!/usr/bin/env python
 from fabric.api import *

 env.user='root'
 env.hosts=['218.78.186.162','125.208.12.56']
 env.passwords={ '[email protected]:22':'XXX','[email protected]:22':'XXXX@0'}

 @runs_once
 def input_raw():
     return prompt("please input directory name:",default="/home")

 def worktask(dirname):
     run("ls -l "+dirname)

 @task
 def go():
     getdirname = input_raw()
     worktask(getdirname)

跳板机：

 #!/usr/bin/env python
 from fabric.api import *
 from fabric.context_managers import *
 from fabric.contrib.console import confirm

 env.user='root'
 env.gateway='218.78.186.162'
 env.hosts=['125.208.12.56']
 env.passwords={ '[email protected]:22':'XX','[email protected]:22':'XXXX@0'}



 lpackpath="/home/install/lnmp0.9.tar.gz"
 rpackpath="/tmp/install"

 @task
 def put_task():
     run("mkdir -p /tmp/install")
     with settings(warn_only=True):
         result = put(lpackpath, rpackpath)
     if result.failed and not confirm("put file failed, Continue[Y/N]?"):
         abort("Aborting file put task!")

 @task
 def run_task():
     with cd("/tmp/install"):
         run("tar -zxvf lnmp0.9.tar.gz")
         run("ls -l")

 @task
 def go():
     put_task()
     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

#!/usr/bin/env python
from fabric.api import *
class Student(object):
        def __init__(self,user,ip):
                env.user=user
                env.hosts=[ip]
                env.password='XXX'
        @runs_once
        def local_task(self):
                local("hostname")

        def remote_task(self):
                vhost=run("df -h")
                return vhost

def yunxing(user,ip):
    tom=Student(user,ip)
    print execute(tom.remote_task)


yunxing('root','218.78.186.162')   ###直接调用该函数传参即可

更多内容可见《python自动化运维技术与最佳实 践 》 第7章-Fabric模块

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转载于:http://blog.itpub.net/29096438/viewspace-2124011/