puppet recursive directories creation

Question

I am trying to create recursively directories with same structure:

I have the followig dirs:

/some-1 /some-2 /some-3 /some-4

and inside each of them I'd like to create the same structure, let name it pool:

/some-1/pool /some-2/pool /some-3/pool /some-4/pool

as suggested by Albert an elegant solution could be via the "define" method of puppet.

define create_pool {
file { "/some-$title/pool":
    ensure => "directory",
    recurse => "true",
 }
}   

create_pool { [1,2,3,4]: }

Fortunately this solution is "looping" through the list:

Solution 1

define create_pool {
  file { "/some-$title":
    ensure => "directory"
  }
  file { "/some-$title/pool":
    ensure => "directory"
  }
}

create_pool { ["a", "b", "c", "d"]: }

a define automagically loops over its "arguments" :)

Solution 2

You can first create an array of directories you need either manually or:

$directories = split('/some/path/to/somewhere', '/')

and then create them in a loop:

each($directories) |$directory| {
  if ! defined (File[$directory]) {
    file { $directory: ensure => directory }
  }
}

I'm using if not defined to make sure I don't have conflicts between different modules/classes that reuse parts of the path.

Edit: You might be required to add parser=future to your puppet.conf for the loop to work.

Comments

[DrFalk3n]

As stated, passing such a list won't work, simply 'cause will create the wrong tree: Create_pool[3]/File[/some-1234/pool]/ensure: change from absent to directory failed: Cannot create /some-1234/pool; parent directory /some-1234 does not exists. What I need is /some-1/pool, /some-2/pool, /some-3/pool, /some-4/pool

[drAlberT]

This is a simple and obvious change to a sample code .. it suffice to add the creation of the parent directory first .. in the same define .. the question was the loop, not the creation of files or dirs .. or am I missing something? Anyway I edited to create the parent dir before the child, tnx

[DrFalk3n]

No doubt by the fact that your solution is elegant ( ;) as usual) but did you had time to give it a try!? I'll edit the question including your proposal that unfortunately is not "looping" too. What it tries to create is something like /some-1234/pool and not just 4 different dirs. That's why the question exist, indeed not that obvious, I suspect the task is a bit out of scope/philosophy for puppet.

[drAlberT]

I don't have a way to try now, but it should work .. are u sure the problem is not the use of numbers? try using 4 strings create_pool { ["one", "two", "three", "four"]: } BTW, stackoverflow.com/questions/12958114/… just confirm my approach afaics

[DrFalk3n]

Well numbers where coming from a tertiary application and not validated! So thnks to your last comment I fixed the issue...what else... Ad majora! Bis nächstes Mal!