Create a variable variable

[rvlinden]

Hi all,

 

I'm wondering if puppet can create a variable based on another variable ??

Here is an example

 

3 global varibles

 

$::gbl_users_groups = app1,app2

$::gbl_users_accounts_app1 = app1user1,app1user2

$::gbl_users_accounts_app2 = app2user1,app2user2

 

What does work is this

 

$groups_name_array = split($::gbl_users_accounts_app1,',')

 or

$groups_name_array = split($::gbl_users_accounts_app2,',')

 

 

What I really want to do, is replace the static app1 and app2 within the $groups_name_array, to something dynamic like this

 

$groups_array = split($::gbl_users_groups,',')

$groups_name_array = split($::gbl_users_accounts_$groups_array,',')

 

If have tried various combination, but just can seen to find the right one (if it is possible)

 

Any suggestions

 

Regards, Rene

[Henrik Lindberg]

Did you consider using a hash?

$x = { 'app1' => 'app1user1,app1user2', 'app2 => '...' }
$group = 'app1'
$y = split($x[$group], ',')

In the DSL it is not possible to reference a variable in a dynamic way
(i.e. compute the variable name), but you can compute a hash key.

e.g.
$group_nrb = 1
$y = split($x["app${group_nbr}"], ',')

Hope that helps
- henrik

On 2012-15-10 14:12, rvlinden wrote:
> Hi all,
> I'm wondering if puppet can create a variable based on another variable ??
> Here is an example
> 3 global varibles
> $::gbl_users_groups = app1,app2
> $::gbl_users_accounts_app1 = app1user1,app1user2
> $::gbl_users_accounts_app2 = app2user1,app2user2
> What does work is this
> $groups_name_array = split($::gbl_users_accounts_app1,',')
> or
> $groups_name_array = split($::gbl_users_accounts_app2,',')
> What I really want to do, is replace the static app1 and app2 within the
> $groups_name_array, to something dynamic like this
> $groups_array = split($::gbl_users_groups,',')

> $groups_name_array = split($::gbl_users_accounts_*$groups_array*,',')

> If have tried various combination, but just can seen to find the right
> one (if it is possible)
> Any suggestions
> Regards, Rene
>

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[John Warburton]

On 15 October 2012 23:12, rvlinden <rene.vand...@gmail.com> wrote:

Hi all,

 

I'm wondering if puppet can create a variable based on another variable ??

Here is an example

A quick google of "puppet variable variables" found me https://blog.kumina.nl/2010/09/puppet-tipstricks-variable-variables/

I've used the method described

John