Python Fabric

Python Fabric

• 원격 SSH Remote를 이용한 Shell Command 실행기
• Deploy, 인프라 Provisioning 등에서 사용을 할 수 있다.
• SSH Key로 이용하여 원격 컨트롤 할수 있다
•  SSH Key 생성 가이드 : https://opentutorials.org/module/432/3742
• 적용 방법 : https://stackoverflow.com/questions/5069895/connecting-to-ec2-using-keypair-pem-file-via-fabric
• env : https://stackoverflow.com/questions/5327465/using-an-ssh-keyfile-with-fabric#5327496
• https://gist.github.com/yuvadm/872506
  

Single Command

>>> result = Connection('web1').run('hostname')

web1

>>> result

<Result cmd='hostname' exited=0>

>>> from fabric import SerialGroup

>>> result = SerialGroup('web1', 'web2').run('hostname')

web1

web2

>>> # Sorting for consistency...it's a dict!

>>> sorted(result.items())

[(<Connection host=web1>, <Result cmd='hostname' exited=0>), ...]

Command with python code

>>> def disk_free(c):

...     uname = c.run('uname -s', hide=True)

...     if 'Linux' in uname.stdout:

...         command = "df -h / | tail -n1 | awk '{print $5}'"

...         return c.run(command, hide=True).stdout.strip()

...     err = "No idea how to get disk space on {}!".format(uname)

...     raise Exit(err)

...

>>> print(disk_free(Connection('web1')))

33%

>>> # NOTE: Same code as above!

>>> def disk_free(c):

...     uname = c.run('uname -s', hide=True)

...     if 'Linux' in uname.stdout:

...         command = "df -h / | tail -n1 | awk '{print $5}'"

...         return c.run(command, hide=True).stdout.strip()

...     err = "No idea how to get disk space on {}!".format(uname)

...     raise Exit(err)

...

>>> for cxn in SerialGroup('web1', 'web2', 'db1'):

...    print("{}: {}".format(cxn, disk_free(cxn)))

<Connection host=web1>: 33%

<Connection host=web2>: 17%

<Connection host=db1>: 2%