Re: Build a file with serveral time the same sequence

[Tim Nelson]

On Fri, 10 Feb 2006, Etienne Chove wrote:

> On Fri, Feb 10, 2006 at 04:25:20PM +1100, Tim Nelson wrote:
> >         We'll need a little more information before we can help, such as:
> > -       Do you want to generate this on the server, or on each client
> > -       Assuming you want it on the server, do you want a bunch of these
> >         entries in the one file, or do you want them in separate files for
> >         each server?
>
> I have a main server (green), wich have 3 replicat (blue, red, yellow).
> The 3 replicat are in the cfengine group 'replicat'.
>
> On the server 'green', I've to generate a unique file with theses lines :
>
> """
> define server blue.localdomain
> type replicat
> auth ssl /path/to/ssl/blue.ssl
>
> define server red.localdomain
> type replicat
> auth ssl /path/to/ssl/red.ssl
>
> define server yellow.localdomain
> type replicat
> auth ssl /path/to/ssl/yellow.ssl
> """
>
> I'd like to generate this file with cfengine, so if I want to add a
> replicat, I add it in the group 'replica' and cfengine generate the main
> server config and install the service on the replica.

	I can't think of any way to do this with cfengine itself. 
However, it is possible if you also use cfengine-masterconf (and 
cfengine-masterconf-pt) which you can find by going to 
http://arpmats.sourceforge.net/ and clicking the cfengine-masterconf link.

	If you're using that, it should be possible to embed server-side 
perl that will do this.

        Alternatively, you could use a perl script that does this:
--------------------------------------------
#!/usr/bin/perl

@replicats = qw(red blue yellow);

$str = join "\n", map {
<<EOT;
define server $_.localdomain
type replicat
auth ssl /path/to/ssl/yellow.ssl
EOT
} @replicats;

putfile("configfile", $str);

$str = join " ", @replicats;
$str = <<EOT;
groups:
        any::
                replicat = ( $str )
EOT
putfile("classes.conf", $str);
--------------------------------------------
	The putfile function puts the string in the file, and is left as 
an exercise to the reader.

        You would then need to have the following file:

cfagent.conf
--------------------------------------------
import:
        any::
                classes.conf
                main.conf
--------------------------------------------

        ...and you would put all your main cfengine config in main.conf

	The perl code above is untested, but should hopefully give you the 
idea.

--
Kind Regards,
 
Tim Nelson
Server Administrator
 
P: 03 9934 0888
F: 03 9934 0899
E: tim.nelson@webalive.biz
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