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Tim Harper

2008-Nov-03 18:44 UTC

[Puppet Users] How to duplicate the ''parameter absent'' behavior of user

I have a define that acts as a convenience wrapper around the user  
type and a few other things.

With the ''user'' type, if don''t pass the uid
parameter, it will default
to let the system auto-assign it.  However, passing uid => null,  
false, -1, etc all try and set a specific uid, which is obviously wrong.

Am I up a creek without a paddle :)?  Anybody have any idea how to do  
this?

Here''s what I have so far (it sucks, but it''s the best I could
do to
work around):

define normal_user ( $ensure = present, $comment = "Puppet created  
user", $groups = [], $default_password = false, $key_type =
"ssh-rsa",
$key_name = "puppet-installed-key", $key = false, $uid = false, $gid =
false) {
   # how do you pass in a variable as undefined???
   if $uid {
     user { $title:
       ensure     => $ensure,
       comment    => $comment,
       home       => "/home/$title",
       managehome => true,
       groups     => $groups,
       gid        => $gid,
       uid        => $uid
     }
   } else {
     user { $title:
       ensure     => $ensure,
       comment    => $comment,
       home       => "/home/$title",
       managehome => true,
       groups     => $groups,
     }
   }
   if $key {
     ssh_authorized_key { $title: ensure => $ensure, type =>  
$key_type, user => $title, name => $key_name, key => $key }
   }
   if $default_password {
     default_password { $title: password => $default_password }
   }
}



Thanks!

Tim

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Marcin Owsiany

2008-Nov-03 18:48 UTC

head link

[Puppet Users] Re: How to duplicate the ''parameter absent'' behavior of user

On Mon, Nov 03, 2008 at 11:44:08AM -0700, Tim Harper
wrote:> 
> I have a define that acts as a convenience wrapper around the user  
> type and a few other things.
> 
> With the ''user'' type, if don''t pass the uid
parameter, it will default
> to let the system auto-assign it.  However, passing uid => null,  
If memory serves me, it should be uid => nil

-- 
Marcin Owsiany <marcin@owsiany.pl>              http://marcin.owsiany.pl/
GnuPG: 1024D/60F41216  FE67 DA2D 0ACA FC5E 3F75  D6F6 3A0D 8AA0 60F4 1216
 
"Every program in development at MIT expands until it can read mail."
                                                              -- Unknown

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Paul Lathrop

2008-Nov-04 01:47 UTC

head link

[Puppet Users] Re: How to duplicate the ''parameter absent'' behavior of user

You want uid => undef

--Paul

On Mon, Nov 3, 2008 at 11:44 AM, Tim Harper <timcharper@gmail.com>
wrote:>
> I have a define that acts as a convenience wrapper around the user
> type and a few other things.
>
> With the ''user'' type, if don''t pass the uid
parameter, it will default
> to let the system auto-assign it.  However, passing uid => null,
> false, -1, etc all try and set a specific uid, which is obviously wrong.
>
> Am I up a creek without a paddle :)?  Anybody have any idea how to do
> this?
>
> Here''s what I have so far (it sucks, but it''s the best I
could do to
> work around):
>
> define normal_user ( $ensure = present, $comment = "Puppet created
> user", $groups = [], $default_password = false, $key_type =
"ssh-rsa",
> $key_name = "puppet-installed-key", $key = false, $uid = false,
$gid > false) {
>   # how do you pass in a variable as undefined???
>   if $uid {
>     user { $title:
>       ensure     => $ensure,
>       comment    => $comment,
>       home       => "/home/$title",
>       managehome => true,
>       groups     => $groups,
>       gid        => $gid,
>       uid        => $uid
>     }
>   } else {
>     user { $title:
>       ensure     => $ensure,
>       comment    => $comment,
>       home       => "/home/$title",
>       managehome => true,
>       groups     => $groups,
>     }
>   }
>   if $key {
>     ssh_authorized_key { $title: ensure => $ensure, type =>
> $key_type, user => $title, name => $key_name, key => $key }
>   }
>   if $default_password {
>     default_password { $title: password => $default_password }
>   }
> }
>
>
>
> Thanks!
>
> Tim
>
> >
>
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2008-Nov-04 03:46 UTC

head link

[Puppet Users] Re: How to duplicate the ''parameter absent'' behavior of user

Can''t undef only be used with the inheritance syntax?

The closest we have to initializing to undefined is an empty string  
('''') - you can compare this quite easily in .6  - check the
language
tut - but you need to do a case/selector for comparism pre-.6

E.g.;
case $uid {
   '''': {
     user { ''..'':
       other_params => whatever
     }
   }
   default: {
     user { ''..'':
       uid => $uid
     }
   }
}

On 4/11/2008, at 2:47 PM, "Paul Lathrop"
<paul@tertiusfamily.net> wrote:
>
> You want uid => undef
>
> --Paul
>
> On Mon, Nov 3, 2008 at 11:44 AM, Tim Harper <timcharper@gmail.com>  
> wrote:
>>
>> I have a define that acts as a convenience wrapper around the user
>> type and a few other things.
>>
>> With the ''user'' type, if don''t pass the uid
parameter, it will
>> default
>> to let the system auto-assign it.  However, passing uid => null,
>> false, -1, etc all try and set a specific uid, which is obviously  
>> wrong.
>>
>> Am I up a creek without a paddle :)?  Anybody have any idea how to do
>> this?
>>
>> Here''s what I have so far (it sucks, but it''s the
best I could do to
>> work around):
>>
>> define normal_user ( $ensure = present, $comment = "Puppet created
>> user", $groups = [], $default_password = false, $key_type =
"ssh-
>> rsa",
>> $key_name = "puppet-installed-key", $key = false, $uid =
false,
>> $gid >> false) {
>>  # how do you pass in a variable as undefined???
>>  if $uid {
>>    user { $title:
>>      ensure     => $ensure,
>>      comment    => $comment,
>>      home       => "/home/$title",
>>      managehome => true,
>>      groups     => $groups,
>>      gid        => $gid,
>>      uid        => $uid
>>    }
>>  } else {
>>    user { $title:
>>      ensure     => $ensure,
>>      comment    => $comment,
>>      home       => "/home/$title",
>>      managehome => true,
>>      groups     => $groups,
>>    }
>>  }
>>  if $key {
>>    ssh_authorized_key { $title: ensure => $ensure, type =>
>> $key_type, user => $title, name => $key_name, key => $key }
>>  }
>>  if $default_password {
>>    default_password { $title: password => $default_password }
>>  }
>> }
>>
>>
>>
>> Thanks!
>>
>> Tim
>>
>>>
>>
>
> >
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Tim Harper

2008-Nov-04 19:44 UTC

head link

[Puppet Users] Re: How to duplicate the ''parameter absent'' behavior of user

>> You want uid => undef
>>
>> --Paul
>

Thanks Paul - this is the lead I needed to get to at least a work  
around.

Given:

=== EXHIBIT A ==define user_test() {
   user { $title:
     ensure     => present,
     uid        => undef
   }
}

node "server" {
   user_test { ''boogy'': }
}

=== EXHIBIT B ==define user_test(uid = undef) {
   user { $title:
     ensure     => present,
     uid        => $uid
   }
}

node "server" {
   user_test { ''boogy'': }
}

=== EXHIBIT C ==define user_test(uid = undef) {
   user { $title:
     ensure     => present,
     uid        => $uid ? { undef => undef, default => $uid }
   }
}

node "server" {
   user_test { ''boogy'': }
}

=== EXHIBIT D ==define user_test(uid = false) {
   user { $title:
     ensure     => present,
     uid        => $uid ? { false => undef, default => $uid }
   }
}

node "server" {
   user_test { ''boogy'': }
}
=== END EXHIBITS ==



=== OUTPUT FROM EXHIBIT B ==puppetd --test
info: Caching catalog at /var/puppet/state/localconfig.yaml
notice: Starting catalog run
err: //Node[server]/User_test[boogy]/User[boogy]/uid: change from 511  
to  failed: Could not set uid on user[boogy]: Execution of ''/usr/sbin/ 
usermod -u  boogy'' returned 4: usermod: uid 0 is not unique

notice: Finished catalog run in 5.80 seconds
=== END OUTPUT ==


Results:

EXHIBIT A: works (except I can''t specify uid, naturally)
EXHIBIT B: fails (see OUTPUT FROM EXHIBIT B)
EXHIBIT C: fails (similar to OUTPUT FROM EXHIBIT B)
EXHIBIT D: works!

So, apparently you can''t assign undef to a variable. I''m
thinking this
is a bug.  Thoughts, anyone?

Thanks,

Tim

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2008-Nov-04 20:54 UTC

head link

[Puppet Users] Re: How to duplicate the ''parameter absent'' behavior of user

As my reply soriginally tated, undef is part of the override syntax  
and as such is only valid in an inherited, overridden resource. I.e.;  
not a bug.

Perhaps a feature request, although I personally believe that empty  
string assignment is sufficient.

On 5/11/2008 at 8:44 AM, Tim Harper <timcharper@gmail.com> wrote:
>
>>> You want uid => undef
>>>
>>> --Paul
>>
>
>
> Thanks Paul - this is the lead I needed to get to at least a work
> around.
>
> Given:
>
> === EXHIBIT A ==> define user_test() {
>   user { $title:
>     ensure     => present,
>     uid        => undef
>   }
> }
>
> node "server" {
>   user_test { ''boogy'': }
> }
>
> === EXHIBIT B ==> define user_test(uid = undef) {
>   user { $title:
>     ensure     => present,
>     uid        => $uid
>   }
> }
>
> node "server" {
>   user_test { ''boogy'': }
> }
>
> === EXHIBIT C ==> define user_test(uid = undef) {
>   user { $title:
>     ensure     => present,
>     uid        => $uid ? { undef => undef, default => $uid }
>   }
> }
>
> node "server" {
>   user_test { ''boogy'': }
> }
>
> === EXHIBIT D ==> define user_test(uid = false) {
>   user { $title:
>     ensure     => present,
>     uid        => $uid ? { false => undef, default => $uid }
>   }
> }
>
> node "server" {
>   user_test { ''boogy'': }
> }
> === END EXHIBITS ==>
>
>
>
> === OUTPUT FROM EXHIBIT B ==> puppetd --test
> info: Caching catalog at /var/puppet/state/localconfig.yaml
> notice: Starting catalog run
> err: //Node[server]/User_test[boogy]/User[boogy]/uid: change from 511
> to  failed: Could not set uid on user[boogy]: Execution of
''/usr/sbin/
> usermod -u  boogy'' returned 4: usermod: uid 0 is not unique
>
> notice: Finished catalog run in 5.80 seconds
> === END OUTPUT ==>
>
>
> Results:
>
> EXHIBIT A: works (except I can''t specify uid, naturally)
> EXHIBIT B: fails (see OUTPUT FROM EXHIBIT B)
> EXHIBIT C: fails (similar to OUTPUT FROM EXHIBIT B)
> EXHIBIT D: works!
>
> So, apparently you can''t assign undef to a variable. I''m
thinking this
> is a bug.  Thoughts, anyone?
>
> Thanks,
>
> Tim
>
> >
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Tim Harper

2008-Nov-04 21:10 UTC

head link

[Puppet Users] Re: How to duplicate the ''parameter absent'' behavior of user

On Nov 4, 2008, at 1:54 PM, Aj wrote:
>
> As my reply soriginally tated, undef is part of the override syntax
> and as such is only valid in an inherited, overridden resource. I.e.;
> not a bug.
>
> Perhaps a feature request, although I personally believe that empty
> string assignment is sufficient.
Thanks for the reply, Aj :)

I can agree that it''s not a bug, though being unable replicate the  
parameter behavior of core Type''s without resulting to ruby is a bit  
of a gotcha.  I''ll continue with the workaround achieved by EXHIBIT D
>
> On 5/11/2008 at 8:44 AM, Tim Harper <timcharper@gmail.com> wrote:
>> === EXHIBIT D ==>> define user_test(uid = false) {
>>  user { $title:
>>    ensure     => present,
>>    uid        => $uid ? { false => undef, default => $uid }
>>  }
>> }
>>
>> node "server" {
>>  user_test { ''boogy'': }
>> }
>>
:)

Tim

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Luke Kanies

2008-Nov-12 22:58 UTC

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[Puppet Users] Re: How to duplicate the ''parameter absent'' behavior of user

On Nov 4, 2008, at 12:54 PM, Aj wrote:
> As my reply soriginally tated, undef is part of the override syntax
> and as such is only valid in an inherited, overridden resource. I.e.;
> not a bug.
>
> Perhaps a feature request, although I personally believe that empty
> string assignment is sufficient.

Undef is a valid rvalue just about anywhere; works fine outside of  
overrides.

-- 
An expert is a person who has made all the mistakes that can be made
in a very narrow field. - Niels Bohr
---------------------------------------------------------------------
Luke Kanies | http://reductivelabs.com | http://madstop.com


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Puppet users - Nov 2008 - How to duplicate the 'parameter absent' behavior of user

[Puppet Users] How to duplicate the ''parameter absent'' behavior of user

[Puppet Users] Re: How to duplicate the ''parameter absent'' behavior of user

[Puppet Users] Re: How to duplicate the ''parameter absent'' behavior of user

[Puppet Users] Re: How to duplicate the ''parameter absent'' behavior of user

[Puppet Users] Re: How to duplicate the ''parameter absent'' behavior of user

[Puppet Users] Re: How to duplicate the ''parameter absent'' behavior of user

[Puppet Users] Re: How to duplicate the ''parameter absent'' behavior of user

[Puppet Users] Re: How to duplicate the ''parameter absent'' behavior of user