Re: [Fab-user] Using SSH Config/Host aliases

[Michael Gliwinski]

On Thursday 16 Dec 2010 15:09:06 Carlton Gibson wrote:
[...]
> getting Fabric to use it. What I do want to be able to do is specify
> rememberable/readable shortcut names for hosts in the fabfile and on the
> command line rather than opaque IP address & port number combinations.
> 
> So, on the command line I'd like something like:
> 
>       $ fab -H my_site deploy
> 
> and in @hosts decorators I'd like something like:
> 
>       @hosts('my_site')
> 
> Even if the actual hostname is more like:
> 
>       address@hidden:1234
> 
[...]

You could use roledefs for that.  A role is a list of hosts but nothing stops 
you from having roles with just 1 host.

>         config = SSHConfig()
>         config.parse(config_file)
>         keys = [config.lookup(host).get('identityfile', None)
>             for host in env.hosts]
>         env.key_filename = [expanduser(key) for key in keys if key is not
> None] env.hosts = [hostinfo(host, config) for host in env.hosts]

Since hosts specifies which hosts the task is supposed to run on, I don't 
think this will do what you want (this would mean to run the tasks on all 
hosts in your config file if I'm reading it correctly).

But as mentioned above, if instead you populate env.roledefs like

env.roledefs[nick] = [host_str]

you could then use `fab -R nick ...` on command line.


-- 
Michael Gliwinski
Henderson Group Information Services
9-11 Hightown Avenue, Newtownabby, BT36 4RT
Phone: 028 9034 3319

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