Re: [Fab-user] setting hosts

[Jeremy M. Jones]

I'm still getting an attribute error when I have this:

  1 from fabric.api import run, put, roles, env
  2
  3 env.user = 'jmjones'
  4 env.roles.home = ['mydomain']
  5 env.roles.ezr = ['192.168.1.20']
  6 #env.hosts = []
  7
  8 @roles('home', 'ezr')
  9 def all():
 10     pass
 11
 12 @roles('ezr')
 13 def ezr():
 14     pass
 15
 16 @roles('home')
 17 def home():
 18     pass
 19
 20 def ls():
 21     run('ls')

Here's the command I used:

(fab_git)address@hidden:~/fab/home$ fab ezr ls
/home/jmjones/python/fab_git/lib/python2.6/site-packages/ 
pycrypto-2.0.1-py2.6-linux-x86_64.egg/Crypto/Hash/SHA.py:6:  
DeprecationWarning: the sha module is deprecated; use the hashlib  
module instead
/home/jmjones/python/fab_git/lib/python2.6/site-packages/ 
pycrypto-2.0.1-py2.6-linux-x86_64.egg/Crypto/Hash/MD5.py:6:  
DeprecationWarning: the md5 module is deprecated; use hashlib instead
Traceback (most recent call last):
  File "build/bdist.linux-x86_64/egg/fabric/main.py", line 339, in main
  File "build/bdist.linux-x86_64/egg/fabric/main.py", line 116, in  
load_fabfile
  File "/home/jmjones/fab/home/fabfile.py", line 4, in <module>
    env.roles.home = ['mydomain']
  File "build/bdist.linux-x86_64/egg/fabric/state.py", line 64, in  
__getattr__
AttributeError

- jmj

On May 11, 2009, at 1:28 PM, Patrick J McNerthney wrote:

> Try:
>
> env.roles.webserver = ['www1', 'www2']
> env.roles.dbserver = ['db1']
> @roles('webserver', 'dbserver')
> def my_func():
>       pass
>
> Pat McNerthney
> ClearPoint Metrics, Inc.
>
>
> Jeremy M. Jones wrote:
> > What's the canonical way of creating groups of hosts and then  
> > selecting that group (or sets of groups) to execute for a  
> > particular function at runtime?  I initially thought that it  
> > included using the roles, but I can't get that working right.   
> > According the the docstrings in the decorators.py module, using  
> > roles should look like this:
> >
> > 41         env.webserver = ['www1', 'www2']
> > 42         env.dbserver = ['db1']
> > 43
> > 44         @roles('webserver', 'dbserver')
> > 45         def my_func():
> > 46             pass
> >
> > But when I run something like this:
> >
> >  1 from fabric.api import run, put, roles
> >  2 from fabric.state import env
> >  3
> >  4 env.user = 'myuser'
> >  5 env.home = ['my.host.com']
> >  6 env.ezr = ['192.168.1.20']
> >  7 env.hosts = []
> >  8
> >  9 @roles('home', 'ezr')
> > 10 def all():
> > 11     pass
> > 12
> > 13 @roles('ezr')
> > 14 def ezr():
> > 15     pass
> > 16
> > 17 @roles('home')
> > 18 def home():
> > 19     pass
> > 20
> > 21 def ls():
> > 22     run('ls')
> >
> > With a command line looking like this::
> >
> >    fab ezr ls
> >
> > I get an error like this::
> >
> > Traceback (most recent call last):
> >  File "build/bdist.linux-x86_64/egg/fabric/main.py", line 391, in  
> > main
> >  File "build/bdist.linux-x86_64/egg/fabric/main.py", line 305, in  
> > get_hosts
> > KeyError: 'ezr'
> >
> > I figured that attributes on the "env" object would be interpreted  
> > as roles, but that doesn't appear to be the case.  And even if this  
> > worked properly, I'm not sure that this would do what I wanted it  
> > to do.  It seems that it would set the .roles attribute on the  
> > decorated functions with the specified roles rather than adding the  
> > hosts for those roles to some global run registry or something like  
> > that.
> >
> > Anyway, are there working examples for the current 0.9 release that  
> > will allow me to sort of do what I want to do?  I can monkey around  
> > with sets and the hosts list with various functions, but it seems  
> > like there should be a cleaner to do this.
> >
> > - jmj
> >
> >
> > _______________________________________________
> > Fab-user mailing list
> > address@hidden
> > http://lists.nongnu.org/mailman/listinfo/fab-user