Hi Felix,
Have you try to use a context manager instead of the decorator? I´m not
really sure if you can use it as a decorator...
def _my_function():
with_settings(hide("status")):
try:
out = run("uname")
puts("OS is " + out)
except SystemExit:
puts("can't get the OS")
That's the way I'm using it in my scripts and it seems to work, but we're
using it just for Ubuntu and CentOS...
Keep us posted
Regards!
2015-03-12 0:53 GMT+01:00 Felix Almeida <[email protected]>:
> Hi all,
>
>
>
> I need to validate if a certain UNIX account is able to log in to a
> series of servers of mixed flavors (HP-UX, Solaris, RHEL and AIX) so I’m
> trying to do it with fabric.
>
>
>
> I wanted to apply *hide("status")* to an entire internal function, but
> I keep getting the following error:
>
>
>
> elxin009: ~/fabric # fab main
>
> [bsnbk001] out: SunOS
>
> [bsnbk001] out:
>
> [bsnbk001] OS is SunOS
>
> Disconnecting from bsnbk001... done.
>
> Traceback (most recent call last):
>
> File "/usr/local/lib/python2.7/site-packages/fabric/main.py", line 743,
> in main
>
> *args, **kwargs
>
> File "/usr/local/lib/python2.7/site-packages/fabric/tasks.py", line 424,
> in execute
>
> results['<local-only>'] = task.run(*args, **new_kwargs)
>
> File "/usr/local/lib/python2.7/site-packages/fabric/tasks.py", line 174,
> in run
>
> return self.wrapped(*args, **kwargs)
>
> File "/home/felix/fabric/fabfile.py", line 24, in main
>
> execute(_my_function, hosts=host_list)
>
> File "/usr/local/lib/python2.7/site-packages/fabric/tasks.py", line 384,
> in execute
>
> multiprocessing
>
> File "/usr/local/lib/python2.7/site-packages/fabric/tasks.py", line 274,
> in _execute
>
> return task.run(*args, **kwargs)
>
> File "/usr/local/lib/python2.7/site-packages/fabric/tasks.py", line 174,
> in run
>
> return self.wrapped(*args, **kwargs)
>
> File "/usr/local/lib/python2.7/site-packages/fabric/decorators.py", line
> 215, in inner
>
> with settings(*arg_settings, **kw_settings):
>
> File "/usr/local/lib/python2.7/contextlib.py", line 17, in __enter__
>
> return self.gen.next()
>
> File "/usr/local/lib/python2.7/contextlib.py", line 112, in nested
>
> vars.append(enter())
>
> File "/usr/local/lib/python2.7/contextlib.py", line 19, in __enter__
>
> raise RuntimeError("generator didn't yield")
>
> RuntimeError: generator didn't yield
>
>
>
> This is a very simplified version of my original code that I’m using for
> troubleshooting since it generates the same error:
>
>
>
> from fabric.api import task, hide, execute, env, puts, run, with_settings
>
>
>
> env.use_shell = False
>
> env.disable_known_hosts = True
>
> env.warn_only = True
>
> env.abort_on_prompts = True
>
> env.skip_bad_hosts = True
>
> env.command_timeout = 3
>
> env.eagerly_disconnect = True
>
> env.always_use_pty = False
>
>
>
> @with_settings(hide("status"))
>
> def _my_function():
>
> try:
>
> out = run("uname")
>
> puts("OS is " + out)
>
> except SystemExit:
>
> puts("can't get the OS")
>
>
>
> @task
>
> def main():
>
> host_list = [line.rstrip("\n") for line in open("hosts.txt")]
>
> with hide("running"):
>
> execute(_my_function, hosts=host_list)
>
>
>
> The *hosts.txt* file is just a text file with one hostname per line.
> This was the content of the file when I captured the output above (just two
> servers):
>
>
>
> bsnbk001
>
> slxap003
>
>
>
> In fact, none of the *env* settings makes any difference, but if I
> comment out the *@with_settings* line it works as expected. If the
> *hosts.txt* file contains only one hostname then it also works without
> any errors.
>
>
>
> Please, any ideas of what I am doing wrong? I’m still learning Python so
> forgive me if I’m doing something silly.
>
>
>
>
>
> Thank you,
>
> Felix
>
>
>
> PS: I’m running Fabric 1.10.1 and Paramiko 1.15.2 on RHEL.
>
>
>
>
>
>
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