Re: [Fab-user] No hosts found - Fabric execution model: works only on re

On Thu, Feb 4, 2016 at 2:06 AM, Alec Taylor <address@hidden> wrote:

So this works:
https://github.com/AlecTaylor/fabric_test_cases

But I can't figure out why my larger real case fails. The env is set correctly. I'm running in a virtualenv if that makes a difference.
On Thu, Feb 4, 2016 at 1:02 AM, Carlos García <address@hidden> wrote:
Hi Alec,

I don’t really understand how your example code can work, as the import slave can´t load slave with that directory layout. It should be import slave.slave, but the parent directory lacks of __init__.py so it’s not being recognized as a module.

Please, tell me what exactly do you have. Making some changes I’ve managed to make it work, but I need to know what you have.

Also, how are you executing your scripts?

Regards
2016-02-03 14:44 GMT+01:00 Alec Taylor <address@hidden>:
Nope, that didn't work. Also tried adding `print` statements throughout fabric/tasks.py, but they don't show up.

I've added one to WrappedCallableTask._execute and another two to `execute`.

Even tried uninstalling fabric, editing a cloned version, then installing that. Same lack of debug messages. Also tried outputting to a /tmp file, in case of conflict. Same lack of information.

Not sure why this isn't working
On Wed, Feb 3, 2016 at 11:59 PM, Carlos García <address@hidden> wrote:
Yeah, env must be imported to work.

In your code, probably execute is not using env.hosts for any reason. Try to pass hosts as parameter to execute():
execute(funtimes, hosts = ['ec2-{omitted}.compute.amazonaws.com'])
Let me know if this works. I can’t test by myself right now.

Regards
2016-02-03 13:37 GMT+01:00 Alec Taylor <address@hidden>:
Hmm, I can't seem to confirm the issue in a test case. How is your solution working without importing `env`? - Also, should I import `env` from slave? - I tried setting the two `env`s to equal, but it still prompted me for host (yes, env.hosts is definitely set when it reaches slave)

/tmp/pyttt$ tree
.
├── master
│ ├── master
│ │ └── __init__.py
│ └── setup.py
└── slave
├── setup.py
└── slave
└── __init__.py

4 directories, 4 files

master/__init__.py

#!/usr/bin/env python

from os import environ

from fabric.api import execute, env

from slave import funtimes

env.key_filename = environ['PRIVATE_QUAY_PATH']
env.hosts = ['ec2-{omitted}.compute.amazonaws.com']
env.user = 'ubuntu'

execute(funtimes)

slave/__init__.py

#!/usr/bin/env python

from fabric.api import run

def funtimes():
run('echo Hello funtimes')
On Wed, Jan 27, 2016 at 7:15 PM, Carlos García <address@hidden> wrote:
Hi Alec,

the examples given doesn’t work. Maybe you’re missing something.

env should be imported from fabric.api, if not, Python fails with NameError: name 'env' is not defined

Also, the Python path should include foo/and can/, so you need to call a python executable from the project root (Or add ROOT_DIRECTORY to the python path with sys.path.append(ROOT_DIRECTORY)). For example:
## foo/__init__.py
import sys 
import os
sys.path.append(os.path.abspath('.'))
from fabric.api import execute
from can.haz import funtimes

domain = 'localhost'
env.user = 'bar'
env.password = 'foo'
env.hosts = [domain]

execute(funtimes)
And you execute it with: python foo/__init__.py. And this works.

Regards

2016-01-27 6:21 GMT+01:00 Alec Taylor <address@hidden>:

Using Fabric outside a fabfile. `fabric.api.execute` on relative imported functions works.

Importing other installed modules fails with "No hosts found. Please specify (single) host string for connection:"

To illustrate, this works:

## foo/__init__.py

from fabric.api import execute
from bar import funtimes

domain = 'localhost'
env.user = 'bar'
env.password = 'foo'
env.hosts = [domain]

execute(funtimes)

## foo/bar.py

from fabric.api import run

def funtimes(): run('hello funtimes')

Whilst this fails:

## foo/__init__.py

from fabric.api import execute
from can.haz import funtimes

domain = 'localhost'
env.user = 'bar'
env.password = 'foo'
env.hosts = [domain]

execute(funtimes)

## can/haz.py

from fabric.api import run

def funtimes(): run('hello funtimes')

# also tried
def funtimes2(env):
fabric.api.env = env
run('hello funtimes2')

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From:	Alec Taylor
Subject:	Re: [Fab-user] No hosts found - Fabric execution model: works only on relative imports?
Date:	Fri, 5 Feb 2016 17:31:03 +1100