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Simon Hönscheid

2013-Aug-09 15:47 UTC

[Puppet Users] looping over an hashmap in an .pp file

I have an interesting problem an I found no solution yet:

I want puppet to repeat an exec for every hast element I have:

$database_users = [ {  user                  => ''jira'',
                                 passwort            =>
''supersecure'',
                                 userpermissions => ''LOGIN CREATEDB 
NOSUPERUSER NOCREATEROLE''
                              },     
                              {  user                  =>
''test'',
                                 passwort           =>
''test'',
                                 userpermissions => ''CREATEDB
NOSUPERUSER
NOCREATEROLE''
                              },
                            ]    

now i want to do something in config.pp with it, for every element. is 
there a solution?

  exec { "echo \"CREATE ROLE ${database_user[user]}  WITH 
${database_user[userpermissions]} PASSWORD
''${database_user[password]}'';\"|
psql":
  onlyif => "test `echo \"\\dg\" | psql| grep
${database_user[user]}|wc -l`
-eq 0"
}

thanks simon

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Sergey Arlashin

2013-Aug-09 16:10 UTC

head link

Re: [Puppet Users] looping over an hashmap in an .pp file

Hi Simon,
You can use create_resources
http://docs.puppetlabs.com/references/latest/function.html#createresources

--
Best regards,
Sergey


On Aug 9, 2013, at 7:47 PM, Simon Hönscheid
<simon.hoenscheid.plista@gmail.com> wrote:
> I have an interesting problem an I found no solution yet:
> 
> I want puppet to repeat an exec for every hast element I have:
> 
> $database_users = [ {  user                  =>
''jira'',
>                                  passwort            =>
''supersecure'',
>                                  userpermissions => ''LOGIN
CREATEDB NOSUPERUSER NOCREATEROLE''
>                               },     
>                               {  user                  =>
''test'',
>                                  passwort           =>
''test'',
>                                  userpermissions => ''CREATEDB
NOSUPERUSER NOCREATEROLE''
>                               },
>                             ]    
> 
> now i want to do something in config.pp with it, for every element. is
there a solution?
> 
>   exec { "echo \"CREATE ROLE ${database_user[user]}  WITH
${database_user[userpermissions]} PASSWORD
''${database_user[password]}'';\"| psql":
>   onlyif => "test `echo \"\\dg\" | psql| grep
${database_user[user]}|wc -l` -eq 0"
> }
> 
> thanks simon
> 
> -- 
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>  
>  
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Sergey Arlashin

2013-Aug-09 16:14 UTC

head link

Re: [Puppet Users] looping over an hashmap in an .pp file

also you can use the following way to iterate over a hash:

  $foo = [
            { "addr" => "bar",
              "port" => "1" },
            { "addr" => "bat",
              "port" => "2" }
         ]
  testmod::bar {$foo:}

  define testmod::bar () {
     $var1 = $name["addr"]
     $var2 = $name["port"]
     notify {"${var1}_${var2}": }
  }


--
Best regards,
Sergey Arlashin

On Aug 9, 2013, at 7:47 PM, Simon Hönscheid
<simon.hoenscheid.plista@gmail.com> wrote:
> I have an interesting problem an I found no solution yet:
> 
> I want puppet to repeat an exec for every hast element I have:
> 
> $database_users = [ {  user                  =>
''jira'',
>                                  passwort            =>
''supersecure'',
>                                  userpermissions => ''LOGIN
CREATEDB NOSUPERUSER NOCREATEROLE''
>                               },     
>                               {  user                  =>
''test'',
>                                  passwort           =>
''test'',
>                                  userpermissions => ''CREATEDB
NOSUPERUSER NOCREATEROLE''
>                               },
>                             ]    
> 
> now i want to do something in config.pp with it, for every element. is
there a solution?
> 
>   exec { "echo \"CREATE ROLE ${database_user[user]}  WITH
${database_user[userpermissions]} PASSWORD
''${database_user[password]}'';\"| psql":
>   onlyif => "test `echo \"\\dg\" | psql| grep
${database_user[user]}|wc -l` -eq 0"
> }
> 
> thanks simon
> 
> -- 
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>  
>  
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Simon Hönscheid

2013-Aug-09 16:16 UTC

head link

Re: [Puppet Users] looping over an hashmap in an .pp file

thanks, that looks great!
does that work with 2.7.x with storedconfigs but without hiera backend?

Am Freitag, 9. August 2013 18:10:42 UTC+2 schrieb Sergey
Arlashin:>
> Hi Simon,
> You can use create_resources 
> http://docs.puppetlabs.com/references/latest/function.html#createresources
>
> --
> Best regards,
> Sergey
>
>
> On Aug 9, 2013, at 7:47 PM, Simon Hönscheid
<simon.hoens...@gmail.com<javascript:>>
> wrote:
>
> I have an interesting problem an I found no solution yet:
>
> I want puppet to repeat an exec for every hast element I have:
>
> $database_users = [ {  user                  =>
''jira'',
>                                  passwort            =>
''supersecure'',
>                                  userpermissions => ''LOGIN
CREATEDB
> NOSUPERUSER NOCREATEROLE''
>                               },     
>                               {  user                  =>
''test'',
>                                  passwort           =>
''test'',
>                                  userpermissions => ''CREATEDB
NOSUPERUSER
> NOCREATEROLE''
>                               },
>                             ]    
>
> now i want to do something in config.pp with it, for every element. is 
> there a solution?
>
>   exec { "echo \"CREATE ROLE ${database_user[user]}  WITH 
> ${database_user[userpermissions]} PASSWORD
''${database_user[password]}'';\"|
> psql":
>   onlyif => "test `echo \"\\dg\" | psql| grep
${database_user[user]}|wc
> -l` -eq 0"
> }
>
> thanks simon
>
> -- 
> You received this message because you are subscribed to the Google Groups 
> "Puppet Users" group.
> To unsubscribe from this group and stop receiving emails from it, send an 
> email to puppet-users...@googlegroups.com <javascript:>.
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puppet...@googlegroups.com<javascript:>
> .
> Visit this group at http://groups.google.com/group/puppet-users.
> For more options, visit https://groups.google.com/groups/opt_out.
>  
>  
>
>
>
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Sergey Arlashin

2013-Aug-09 16:21 UTC

head link

Re: [Puppet Users] looping over an hashmap in an .pp file

I''m using 3.2 without hiera backend and have never tried to iterate
over a hash in 2.7. So you can try and report the result :)

--
Best regards,
Sergey Arlashin

On Aug 9, 2013, at 8:16 PM, Simon Hönscheid
<simon.hoenscheid.plista@gmail.com> wrote:
> thanks, that looks great!
> does that work with 2.7.x with storedconfigs but without hiera backend?
> 
> Am Freitag, 9. August 2013 18:10:42 UTC+2 schrieb Sergey Arlashin:
> Hi Simon,
> You can use create_resources
http://docs.puppetlabs.com/references/latest/function.html#createresources
> 
> --
> Best regards,
> Sergey
> 
> 
> On Aug 9, 2013, at 7:47 PM, Simon Hönscheid
<simon.hoens...@gmail.com> wrote:
> 
>> I have an interesting problem an I found no solution yet:
>> 
>> I want puppet to repeat an exec for every hast element I have:
>> 
>> $database_users = [ {  user                  =>
''jira'',
>>                                  passwort            =>
''supersecure'',
>>                                  userpermissions => ''LOGIN
CREATEDB NOSUPERUSER NOCREATEROLE''
>>                               },     
>>                               {  user                  =>
''test'',
>>                                  passwort           =>
''test'',
>>                                  userpermissions =>
''CREATEDB NOSUPERUSER NOCREATEROLE''
>>                               },
>>                             ]    
>> 
>> now i want to do something in config.pp with it, for every element. is
there a solution?
>> 
>>   exec { "echo \"CREATE ROLE ${database_user[user]}  WITH
${database_user[userpermissions]} PASSWORD
''${database_user[password]}'';\"| psql":
>>   onlyif => "test `echo \"\\dg\" | psql| grep
${database_user[user]}|wc -l` -eq 0"
>> }
>> 
>> thanks simon
>> 
>> -- 
>> You received this message because you are subscribed to the Google
Groups "Puppet Users" group.
>> To unsubscribe from this group and stop receiving emails from it, send
an email to puppet-users...@googlegroups.com.
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>> Visit this group at http://groups.google.com/group/puppet-users.
>> For more options, visit https://groups.google.com/groups/opt_out.
>>  
>>  
> 
> 
> -- 
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>  
>  
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jcbollinger

2013-Aug-12 13:39 UTC

head link

[Puppet Users] Re: looping over an hashmap in an .pp file

On Friday, August 9, 2013 10:47:27 AM UTC-5, Simon Hönscheid
wrote:>
> I have an interesting problem an I found no solution yet:
>
> I want puppet to repeat an exec for every hast element I have:
>
> $database_users = [ {  user                  =>
''jira'',
>                                  passwort            =>
''supersecure'',
>                                  userpermissions => ''LOGIN
CREATEDB
> NOSUPERUSER NOCREATEROLE''
>                               },     
>                               {  user                  =>
''test'',
>                                  passwort           =>
''test'',
>                                  userpermissions => ''CREATEDB
NOSUPERUSER
> NOCREATEROLE''
>                               },
>                             ]    
>
> now i want to do something in config.pp with it, for every element. is 
> there a solution?
>
>   exec { "echo \"CREATE ROLE ${database_user[user]}  WITH 
> ${database_user[userpermissions]} PASSWORD
''${database_user[password]}'';\"|
> psql":
>   onlyif => "test `echo \"\\dg\" | psql| grep
${database_user[user]}|wc
> -l` -eq 0"
> }
>
> thanks simon
>

If you actually did have a hashmap (the local terminology being simply 
"hash") then your options would be different, but what you show is
actually
an array of hashes.  Puppet DSL does not have a general foreach feature, 
and neither of Sergey''s suggestions is viable: passing the array as a 
resource title will cause the elements (the hashes) to be flattened to 
strings, and the data structure is not quite correct for create_resources().

From a data perspective, the problem is that your individual hashes are 
anonymous.  That they carry identifying data internally is irrelevant -- 
it''s meaningful to you, but not to Puppet generally.  Would it be
feasible
to structure your data along these lines instead?

$database_users = { ''jira'' => {
                                 password            =>
''supersecure'',
                                 userpermissions => ''LOGIN CREATEDB 
NOSUPERUSER NOCREATEROLE''
                              },
                              ''test'' => {
                                 password           =>
''test'',
                                 userpermissions => ''CREATEDB
NOSUPERUSER
NOCREATEROLE''
                              },
                            }

That is the general form you would want to use with create_resources() and 
a definition along these lines:

define database::user ( $password, $userpermissions ) {
  exec { "db_user_${title}":
    command => "echo \"CREATE ROLE ${title}  WITH
${userpermissions}
PASSWORD ''${password}'';\"| psql",
    unless => "echo ''\\dg'' | psql | grep -q
${title}"
  }
}

Alternatively, there are sometimes reasons to prefer explicit resource 
declarations over create_resources().  With the same (revised) form of the 
data, you could also do this:

  $db_usernames = keys($database_users)
  database::user2 { $db_usernames:
    userdata => $database_users
  }

with a slightly different definition:

define database::user2 ( $all_data ) {
  $data = $all_data[$title]
  exec { "db_user_${title}":
    command => "echo \"CREATE ROLE ${title}  WITH 
${data[''userpermissions'']} PASSWORD
''${data[''password'']}'';\"| psql",
    unless => "echo ''\\dg'' | psql | grep -q
${title}"
  }
}

Alternatively, if the top user data hash is in a class variable somewhere, 
then you can consider skipping passing it as a parameter, and let the 
definition instead access it directly.


John

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Dick Davies

2013-Aug-12 14:43 UTC

head link

Re: [Puppet Users] looping over an hashmap in an .pp file

+1 for create_resources. I use it on 2.7 without storeconfigs, and it
doesn''t
involve hiera at all. I just declare $modulename::data = [ {.....}]
and feed that into
a resource with:

create_resources(resourcename, $modulename::data)

One gotcha: this is a function (essentially a macro that expands into
a load of resource definitions
before they get sent down to the node) - so if you make any typos etc.
it won''t be obvious on
the puppet reports. the master should log errors that''ll help you
debug it, though.


On 9 August 2013 17:16, Simon Hönscheid
<simon.hoenscheid.plista@gmail.com> wrote:> thanks, that looks great!
> does that work with 2.7.x with storedconfigs but without hiera backend?
>
> Am Freitag, 9. August 2013 18:10:42 UTC+2 schrieb Sergey Arlashin:
>>
>> Hi Simon,
>> You can use create_resources
>>
http://docs.puppetlabs.com/references/latest/function.html#createresources
>>
>> --
>> Best regards,
>> Sergey
>>
>>
>> On Aug 9, 2013, at 7:47 PM, Simon Hönscheid
<simon.hoens...@gmail.com>
>> wrote:
>>
>> I have an interesting problem an I found no solution yet:
>>
>> I want puppet to repeat an exec for every hast element I have:
>>
>> $database_users = [ {  user                  =>
''jira'',
>>                                  passwort            =>
''supersecure'',
>>                                  userpermissions => ''LOGIN
CREATEDB
>> NOSUPERUSER NOCREATEROLE''
>>                               },
>>                               {  user                  =>
''test'',
>>                                  passwort           =>
''test'',
>>                                  userpermissions =>
''CREATEDB NOSUPERUSER
>> NOCREATEROLE''
>>                               },
>>                             ]
>>
>> now i want to do something in config.pp with it, for every element. is
>> there a solution?
>>
>>   exec { "echo \"CREATE ROLE ${database_user[user]}  WITH
>> ${database_user[userpermissions]} PASSWORD
''${database_user[password]}'';\"|
>> psql":
>>   onlyif => "test `echo \"\\dg\" | psql| grep
${database_user[user]}|wc
>> -l` -eq 0"
>> }
>>
>> thanks simon
>>
>> --
>> You received this message because you are subscribed to the Google
Groups
>> "Puppet Users" group.
>> To unsubscribe from this group and stop receiving emails from it, send
an
>> email to puppet-users...@googlegroups.com.
>> To post to this group, send email to puppet...@googlegroups.com.
>>
>> Visit this group at http://groups.google.com/group/puppet-users.
>> For more options, visit https://groups.google.com/groups/opt_out.
>>
>>
>>
>>
> --
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>
>
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Puppet users - Aug 2013 - looping over an hashmap in an .pp file

[Puppet Users] looping over an hashmap in an .pp file

Re: [Puppet Users] looping over an hashmap in an .pp file

Re: [Puppet Users] looping over an hashmap in an .pp file

Re: [Puppet Users] looping over an hashmap in an .pp file

Re: [Puppet Users] looping over an hashmap in an .pp file

[Puppet Users] Re: looping over an hashmap in an .pp file

Re: [Puppet Users] looping over an hashmap in an .pp file