how to write a loop to convert all erb files to regular file?

[yi zhao]

Hi, 

so we have a few template setup under my_module/templates/ 

like 

create_pre_rac_setup.sh.erb

run_this_rac.sh.erb

....

and I write someting in init.pp 

  $db_setup_home = "$dbnamehome/dbs/create_$dbname"

     file { "$db_setup_home/create_pre_rac_setup_$dbname.sh":

     ensure => 'file',

     content => template("${module_name}/create_pre_rac_setup.sh.erb"),

     mode => '0644',

     owner => 1001,

     group => 1000,

   }

    file { "$db_setup_home/run_this_rac_$dbname.sh":

     ensure => 'file',

     content => template("${module_name}/run_this_rac.sh.erb"),

     mode => '0644',

     owner => 1001,

     group => 1000,

   }

but if I have 500 templates, I would have to write 500 files which is against puppet thinking, is there a way to write a loop to read all template files under my_module/templates/

then just loop to create the files with the same naming standard?

thank you.

[David Schmitt]

Hi,

Use a "define" for this:
https://docs.puppetlabs.com/puppet/4.2/reference/lang_defined_types.html

To sketch a solution:

define rac_script($home, $source) {
file { "${home}/${name}.sh:
content => template("${source}/${name}.sh.erb",
...
}
}

rac_script {
[ 'create_pre_rac_setup', 'run_this_rac', ... ]:
home => "$dbnamehome/dbs/create_$dbname",
source => $module_name,
}

This would still need a list of all the scripts to deploy, but you can
use e.g.
https://github.com/puppetlabs/puppetlabs-stdlib/#get_module_path and
https://docs.puppetlabs.com/references/latest/function.html#generate to
create that list dynamically with a small script on the master, or
create a custom function to do so in ruby.


Cheers, D.

[David Schmitt]

On 21/10/2015 21:32, yi zhao wrote:

Hi,David,

thank you for the quick reply, I am new to resource type define so may need your help to troubleshoot:

mycode:

 $db_setup_home = "${dbnamehome}/dbs/create_${dbname}"

     define rac_script($home, $source) {

       file { "${home}/${name}.txt":

         content => template("${module_name}/${name}.txt.erb",

^^ needs closing bracket


D.

         mode => '0644',

         owner => 1001,

         group => 1000,

       }

     }

       rac_script {

          [ 'create_pre_rac_setup',

            'run_this_rac',

            'create_catalog',

            'create_database_rac',

          ]:

             home => "$db_setup_home",

             source => "$module_name",

        }

error:

Debug: Caching connection for https://puppet:8140

Error: Could not retrieve catalog from remote server: Error 400 on SERVER: Syntax error at '=>' at /etc/puppetlabs/code/environments/production/modules/exadata/manifests/init.pp:152:15 on node node1.example.com

Warning: Not using cache on failed catalog

Error: Could not retrieve catalog; skipping run

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[yi zhao]

end up I just use a simple array to solve the issue:

Examples

Declaring Resources

Since the focus of the Puppet language is declaring resources, most people will want to use iteration to declare many similar resources at once:

$binaries = ["cfacter", "facter", "hiera", "mco", "puppet", "puppetserver"]

# function call with lambda:
$binaries.each |String $binary| {
  file {"/usr/bin/$binary":
    ensure => link,
    target => "/opt/puppetlabs/bin/$binary",
  }
}

On Tuesday, October 20, 2015 at 5:23:13 PM UTC-7, yi zhao wrote: