Puppet users - Dec 2007 - exec when missing a file but service installed.

Hi all,

   I am new to this list and puppet. I am working at the Rutherford
Appleton Lab and am part of a team that looks after several hundred
servers mainly running Scientific Linux (based on RedHat). I am
currently looking at puppet to be used to perform what is currently done
by kickstart scripts, with these performing an on going configuration
job once the systems are built.

   My current problem is one where I have a need that arises on a couple
of occasions where a service/program is installed, or should be
installed and a file created by that service needs to be created, but is
done by the service/program itself. One of these is the slocate
databases so I require a manifest that does the following:

	Check that slocate is installed
	Check if the slocate db exists (/var/lib/slocate/slocatedb)
		And if not run ''updatedb''
	Else
		Do nothing.


I did come up with the following but it does not work.

	File { "/var/lib/slocate/slocate.db":
		requires => Package["slocate"],
		notify	=> Exec[/usr/bin/updatedb"]
	}

Can anyone point me in the right direction.

Guy


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On Monday 03 December 2007, Weatherburn, G (Guy) wrote:
> Hi all,
>
>    I am new to this list and puppet. I am working at the Rutherford
> Appleton Lab and am part of a team that looks after several hundred
> servers mainly running Scientific Linux (based on RedHat). I am
> currently looking at puppet to be used to perform what is currently done
> by kickstart scripts, with these performing an on going configuration
> job once the systems are built.
>
>    My current problem is one where I have a need that arises on a couple
> of occasions where a service/program is installed, or should be
> installed and a file created by that service needs to be created, but is
> done by the service/program itself. One of these is the slocate
> databases so I require a manifest that does the following:
>
> 	Check that slocate is installed
> 	Check if the slocate db exists (/var/lib/slocate/slocatedb)
> 		And if not run ''updatedb''
> 	Else
> 		Do nothing.
>
>
> I did come up with the following but it does not work.
>
> 	File { "/var/lib/slocate/slocate.db":
> 		requires => Package["slocate"],
> 		notify	=> Exec[/usr/bin/updatedb"]
> 	}
>
> Can anyone point me in the right direction.
Use the "unless" parameter of the Exec type.


Regards, DavidS


- -- 
The primary freedom of open source is not the freedom from cost, but the free-
dom to shape software to do what you want. This freedom is /never/ exercised
without cost, but is available /at all/ only by accepting the very different
costs associated with open source, costs not in money, but in time and effort.
- -- http://www.schierer.org/~luke/log/20070710-1129/on-forks-and-forking
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On 12/3/2007 10:52 AM, David Schmitt wrote:
> On Monday 03 December 2007, Weatherburn, G (Guy) wrote:
>>    My current problem is one where I have a need that arises on a
couple
>> of occasions where a service/program is installed, or should be
>> installed and a file created by that service needs to be created, but
is
>> done by the service/program itself. One of these is the slocate
>> databases so I require a manifest that does the following:
>>
>> 	Check that slocate is installed
>> 	Check if the slocate db exists (/var/lib/slocate/slocatedb)
>> 		And if not run ''updatedb''
>> 	Else
>> 		Do nothing.
>>
>>
>> I did come up with the following but it does not work.
>>
>> 	File { "/var/lib/slocate/slocate.db":
>> 		requires => Package["slocate"],
>> 		notify	=> Exec[/usr/bin/updatedb"]
>> 	}
>>
>> Can anyone point me in the right direction.
> 
> Use the "unless" parameter of the Exec type.
Use ''unless'' if you want to decide based off the return value
of a
program, or ''creates'' if you want to decide based simply off
the
existence of a particular file.

-- 
Mike Renfro  / R&D Engineer, Center for Manufacturing Research,
931 372-3601 / Tennessee Technological University

Thanks for that eventually got it going with the following:


        exec { "update-locate-db" :
                command => "/usr/bin/updatedb",
                unless  => "/usr/bin/test -e
''/var/lib/slocate/slocate.db''"
        }

Works for me. 

Thanks for all the great work on puppet folks.

Guy

-----Original Message-----
From: puppet-users-bounces@madstop.com
[mailto:puppet-users-bounces@madstop.com] On Behalf Of Mike Renfro
Sent: 03 December 2007 17:10
To: Puppet User Discussion
Subject: Re: [Puppet-users] exec when missing a file but service
installed.

On 12/3/2007 10:52 AM, David Schmitt wrote:
> On Monday 03 December 2007, Weatherburn, G (Guy) wrote:
>>    My current problem is one where I have a need that arises on a
couple
>> of occasions where a service/program is installed, or should be
>> installed and a file created by that service needs to be created, but
is
>> done by the service/program itself. One of these is the slocate
>> databases so I require a manifest that does the following:
>>
>> 	Check that slocate is installed
>> 	Check if the slocate db exists (/var/lib/slocate/slocatedb)
>> 		And if not run ''updatedb''
>> 	Else
>> 		Do nothing.
>>
>>
>> I did come up with the following but it does not work.
>>
>> 	File { "/var/lib/slocate/slocate.db":
>> 		requires => Package["slocate"],
>> 		notify	=> Exec[/usr/bin/updatedb"]
>> 	}
>>
>> Can anyone point me in the right direction.
> 
> Use the "unless" parameter of the Exec type.
Use ''unless'' if you want to decide based off the return value
of a
program, or ''creates'' if you want to decide based simply off
the
existence of a particular file.

-- 
Mike Renfro  / R&D Engineer, Center for Manufacturing Research,
931 372-3601 / Tennessee Technological University
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