How to apply template based on a string in a file

[Ray]

Newbie question:  

I need to be able to apply a specific template based on whether a string is found in an 

existing file on the client or not. I tried the following (found an example somewhere... it does not work.. always falls into the first condition)

What would be the correct way to check for the value in the file?

 if "grep STANDARD /var/adm/buildIT/ServerBuild.dat 2>/dev/null"

    {

      file { '/etc/openssh/sshd_config':

        ensure  => file,

        backup  => false,

        content => template("sshdconfig/sshdconfigsol.erb"),

        notify => Service['ssh']

      }

      service { 'ssh':

        ensure => running,

        enable => true,

        hasstatus => true,

        hasrestart => true,

      }

    }

    else

    {

      file { '/etc/openssh/sshd_config':

        ensure  => file,

        backup  => false,

        content => template("sshdconfig/sshdconfigsolpm.erb"),

        notify => Service['ssh']

      }

      service { 'ssh':

        ensure => running,

        enable => true,

        hasstatus => true,

        hasrestart => true,

      }

  }

[Johan De Wit]

If you need information from the client, then you should think 'facter'.

Or you could write a custom fact, or use external facts.

http://puppetlabs.com/blog/facter-1-7-introduces-external-facts
http://docs.puppetlabs.com/guides/custom_facts.html

HTH

Jo

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[Denmat]

Or place those values in hiera. 

To view this discussion on the web visit https://groups.google.com/d/msgid/puppet-users/52FE164C.6070803%40open-future.be.

[José Luis Ledesma]

Hi,

I think that the problem here  is a big misunderstood about how puppet works. Puppet DSL is a declarative language, you do not have to tell what to do (grep "xxx" on file "yyy"), you have to tell which final state do you want. Obviously this final state may depend on data (facts/hiera) but never on an action (grep)

Moreover, puppet manifests are compiled in the puppetmaster (so  if it would be possible to do a grep or any other action, it would be made on the master).

The problem you are facing is that the code

if "any string that you may want"

is always true (at least the string is empty) that's why always falls in the first condition.

regards,

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