Re: [Puppet Users] Duplicate definition + parameterized classes + class scope

[chris_sny...@sra.com]

Crap.  I'm trying to dump Bcfg2 and move to something reasonable.  But so 
far, all my initial assumptions and patterns for Puppet fail.  I think in 
terms of heirarchy and inheritence for my systems (all nodes install a core 
set of packages, some have exceptions for those core set of packages, etc) 
and as best as I can understand it Puppet's DSL really wants me to create a 
set of flat, non-hierarchial, non-inheritable set of nodes/classes. And for 
me that's completely un-managable.  

I'm reviewing the Puppet-user archives now and I'm seeing a lot of people 
with similar problems but no good patterns for solutions.

I want to be able do something like this (hierarchial, inheritance with 
overloading):

class base {
   package { 'sshd' : ensure => present }
   package {'ntp:      ensure => present }
}

node a,b,c {
   class { 'base' : }
}

node d {
   class { 'base' : }
   Package{'sshd': ensure => false }   
}

What I'm afraid I have to do is this (flat, redefine lots of nodes and 
duplicate data):

class base 
   package {'ntp:      ensure => present }
   # More common packages defined
}

node a,b,c {
   class { 'base' : }
   package { 'sshd' : ensure => present }
}

node d {
   class { 'base' : }
   package { 'sshd' : ensure => false}
}

or worse (sometype of parameter passing in the worst, un-managable way):

class base ( # list ever possible ensure parameter, etc ) { 
   package { 'sshd' : ensure => $ssh_ensure }
   package {'ntp:      ensure => $ntp_ensure }
   # More common packages defined
}

node a,b,c {
   class { 'base' : }}
}

node d {
   class { 'base' : ssh_ensure => false}
}


I'm  open to any and all suggestions.

thx
Chris.

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