Puppet users - Aug 2011 - help using unless in exec for postgres database creation

Hi,

I have the following exec type:

exec{"createdb":
        path => "/usr/bin:/usr/sbin:/bin",
        command => "sudo -u postgres createdb -U postgres -E UNICODE
opennms",
        unless => "sudo -u postgres psql -l | grep opennms >
/dev/null",
        require => Service["postgresql"],
     }

Where this basically says, if the database exists don''t run the create
database command.  However, the unless statement doesn''t behave like it
should and puppet apply seems to execute the exec command regardless of what the
unless statement returns.
Below is the error I receive.


err: /Stage[main]/Opennms/Exec[createdb]/returns: change from notrun to 0 
failed: sudo -u postgres createdb -U postgres -E UNICODE opennms returned 1
instead of one of [0] at
/etc/puppetlabs/puppet/modules/opennms/manifests/init.pp:87.

So my question is why is exec ignoring the unless statement?  Also is there a
better way of handling database creation than using exec?



Corey


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