Re: [Fab-user] problem with host_string/hosts (no hosts found)

[Carlos García]

Hi Wawrzek,

if you need to specify a host per task, I would recommend you  to use the @hosts decorator:

@hosts('localhost)

def test():

    print "Hosts:", env['hosts']

    print "Host_string", env['host_string']

    run('uname -a')

Anyway, check out the documentation at http://docs.fabfile.org/en/latest/usage/execution.html#how-host-lists-are-constructed

It explains how the hosts lists are constructed and how can you use it. I usually use the -H flag in the fab command.

Regards

2014-10-03 11:37 GMT+02:00 Wawrzek Niewodniczanski <address@hidden>:

Hi,

For quite a long time I've been using various fabric based scripts.
Recently I hit very strange problem. Following short script
illustrates my issue.


#!/usr/bin/env python

import fabric
from fabric.api import env, run

env.hosts = ['localhost']

def test():
    print "Hosts:", env['hosts']
    print "Host_string", env['host_string']
    run('uname -a')


test()


And when I run It I got:

#>./fabric-min.py
Hosts: ['localhost']
Host_string None
No hosts found. Please specify (single) host string for connection: localhost
[localhost] run: uname -a


I copied content to fabfile.py and got the same:

#>fab test
Hosts: ['localhost']
Host_string None
No hosts found. Please specify (single) host string for connection: ^C
Stopped.

What do I  do wrong?


I run my tests at Ubuntu 14.04 LTS with
Python 2.7.6
Fabric 1.8.2
Paramiko 1.10.1


Thanks,
Wawrzek
--
Dr  Wawrzyniec Niewodniczański    or Wawrzek for short
  PhD in Quantum Chemistry  & MSc in Molecular Engineering
   WWW: http://wawrzek.name E-MAIL: address@hidden
      Linux User #177124

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--

Carlos García
Director de Operaciones

Tel. 695 624 167 - 902 620 100
www.stoneworksolutions.net

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