Puppet users - Feb 2010 - Advanced templating for dummies

Forgive my ignorance, but puppet and ruby are both very new to me.

I am trying to use puppet for (amongst other things) manage a custom
backup script i use on all my machines. The script reads a
configuration file that tells it where to backup from and to. Every
machine is different, some only backup a single folder where others
backup many folders (an example config file is below). I figure the
best way to do this with puppet would be to create a template
configuration file for the backup script and add the custom
definitions in each node manifest.

If the node only has one folder to backup it''s fairly straight
forward, i just define my values for each and everything fills itself
out nicely. Where my problem lies is when there are multiple values
that need to be filled.

(looking at the example below) how would i tell puppet to add "JBoss"
to the conf file with it''s backupsouredir of "/opt/jboss"
with it''s
includes and excludes, then add "Apache" with it''s
backupsourcedir and
includes and excludes". Bear in mind this is just an example i had in
front of me at the time of this writing. Some servers may only have to
backup one directory and others have to backup dozens.

Any help would be appreciated

### Example backup.conf ###
Global {
        hostname=example.mydomain.com
        backupdestroot=/backup/path/example.mydomain.com #Parent
directory for backup files
        logfile=/var/log/backupServer.log       #Full path and
filename of server backup logs
        rsyncopts=-avz --ignore-existing --stats --progress #Global
rsync options for all copies from this server
        includes=#comma separated list of files/directories to
explicitly include for all applications
        excludes=*log *log* *tmp* *work* #comma separated list of
files/directories to explicitly exclude for all applications
}

JBoss {
        backupsourcedir=/opt/jboss
        includes=a,b,c
        excludes=x,y,z
}

Apache {
        backupsourcedir=/etc/httpd
        includes=a,b,c
        excludes=x,y,z
}

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On Fri, Feb 19, 2010 at 4:40 PM, Dan <obrien.dj@gmail.com>
wrote:
> Forgive my ignorance, but puppet and ruby are both very new to me.
>
> I am trying to use puppet for (amongst other things) manage a custom
> backup script i use on all my machines. The script reads a
> configuration file that tells it where to backup from and to. Every
> machine is different, some only backup a single folder where others
> backup many folders (an example config file is below). I figure the
> best way to do this with puppet would be to create a template
> configuration file for the backup script and add the custom
> definitions in each node manifest.
The best (read: absolute dirt simplest) approach I''ve found is to
have all nodes load a common Puppet module to:

1 create the master backup script, which slurps in every file in, say
/etc/backups.d
2. creates a cron entry to run the backup script
3. setup a definition to generate a ''snippet'' file in
/etc/backups.d

Your jboss module can just ''include backups'' and use the
definition to create
it''s own snippet directory.

Like I said, it''s dead simple - I''m sure there are better ways
using
things like
exported resources and storeconfigs, but this approach is working fairly well
for us to do things like apache vhosts, firewall rules, etc.

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