Puppet run order

Question

I've got a question on how to best do this senario, I've got a number of exec commands which need to be run in this order

Exec['A'] -> Exec['B']-> if var = 1(Exec['x']) if var = 2(Exec['y']) if var = 3 (Exec['z]) -> Exec['C'] -> Exec['D']

Basically I have an Exec then I have if statements and then I need to call an exec.

At this moment I've done the following

Exec['A'] { before Exec['B'] } 
Exec['B'] { subscribe Exec['A'] }
if var = 1(Exec['x']) { before Exec['C'] }
if var = 2(Exec['y']) { before Exec['C'] }
if var = 3 (Exec['z]) { before Exec['C'] }
Exec['C'] { before Exec['D'] }
Exec['D']

I'm not sure if this code is idempotent, I just want to confirm with the community in case they see anything I may not be seeing. I have a feeling that the if statements could run before the Exec['A'] which I do not want.

Felix Frank Felix Frank · Accepted Answer · 2014-05-20T15:01:52

The syntax is off, but this does indeed work

Exec['A'] { before => Exec['B'] }
if $var == 1 {
  Exec['x'] { before => Exec['C'] }
}
else {
  Exec['y'] { before => Exec['C'] }
}

Note that this code assumes that all the exec resources A, B, C, x and y have already been declared without any respective before parameters.

Puppet run order

3 Answers