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Luke Bigum

2012-May-11 10:57 UTC

[Puppet Users] override resource created with create_resource function

Hello,

Is it possible to override a resource that is created with the 
create_resource function?

This manifest does not compile:

------------------
$hash = { ''msg'' => { message => ''woof''
} }

class base {
   create_resources(''notify'', $hash)
}

class over inherits base {
   Notify[''msg''] { message => ''meow'' }
}

class { ''base'': }
class { ''over'': }
-----------------

Thanks,

-Luke

-- 
Luke Bigum

Information Systems
Ph: +44 (0) 20 3192 2520
luke.bigum@lmax.com | http://www.lmax.com
LMAX, Yellow Building, 1A Nicholas Road, London W11 4AN


FX and CFDs are leveraged products that can result in losses exceeding
your deposit.  They are not suitable for everyone so please ensure you
fully understand the risks involved.  The information in this email is not
directed at residents of the United States of America or any other
jurisdiction where trading in CFDs and/or FX is restricted or prohibited
by local laws or regulations.

The information in this email and any attachment is confidential and is
intended only for the named recipient(s). The email may not be disclosed
or used by any person other than the addressee, nor may it be copied in
any way. If you are not the intended recipient please notify the sender
immediately and delete any copies of this message. Any unauthorised
copying, disclosure or distribution of the material in this e-mail is
strictly forbidden.

LMAX operates a multilateral trading facility.  Authorised and regulated 
by the Financial Services Authority (firm registration number 509778) and
is registered in England and Wales (number 06505809). 
Our registered address is Yellow Building, 1A Nicholas Road, London, W11
4AN.

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Nan Liu

2012-May-11 17:29 UTC

head link

Re: [Puppet Users] override resource created with create_resource function

On Fri, May 11, 2012 at 3:57 AM, Luke Bigum <Luke.Bigum@lmax.com>
wrote:> Hello,
>
> Is it possible to override a resource that is created with the
> create_resource function?
>
> This manifest does not compile:
>
> ------------------
> $hash = { ''msg'' => { message =>
''woof'' } }
>
> class base {
>  create_resources(''notify'', $hash)
> }
>
> class over inherits base {
>  Notify[''msg''] { message => ''meow'' }
> }
>
> class { ''base'': }
> class { ''over'': }
> -----------------
You can''t declare both classes, but you can override resources in
class over, because we can merge hash values before calling create
resource.

The example here is obviously contrived, but I assume you have a
bigger hash you want to merge. The merge function comes from stdlib:

# don''t inherit base we can create the resources here instead.
class over {
  $local_setting = { ''msg'' => { message =>
''meow''} }
  $newhash = merge($local_setting, $hash)
  create_resource(''notify'', $newhash}
}

Thanks,

Nan

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Luke Bigum

2012-May-14 08:08 UTC

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Re: [Puppet Users] override resource created with create_resource function

Hi Nan,

Thanks for the reply. I did start thinking about how I could use the 
merge function to achieve what I wanted. I was messing around with 
something like this (which obviously doesn''t work because of the 
inheritance order):

-----------------------
$hash = { ''msg'' => { message => ''woof''
} }

class base($more_hash = undef) {
   if ($more_hash) {
     $real_hash = merge($more_hash, $hash)
   } else {
     $real_hash = $hash
   }
   create_resources(''notify'', $real_hash)
}

class over inherits base {
   $more_hash = { ''msg'' => { message =>
''meow'' } }
}

class { ''base'': }
class { ''over'': }
------------------------

This question relates to my other post about a sysctl class. In my case 
I''d like the create_resources call to always reside within class
''base''
as that would be a standard declaration on all nodes - and that''s my 
real problem. Class ''base'' can''t be in a standard
list of declarations
if it''s ever going to take a parameter and be configurable. I have yet 
to find the perfect balance of common things to manage and 
configurability ;-)

-Luke

On 11/05/12 18:29, Nan Liu wrote:> On Fri, May 11, 2012 at 3:57 AM, Luke Bigum<Luke.Bigum@lmax.com> 
wrote:
>> Hello,
>>
>> Is it possible to override a resource that is created with the
>> create_resource function?
>>
>> This manifest does not compile:
>>
>> ------------------
>> $hash = { ''msg'' =>  { message => 
''woof'' } }
>>
>> class base {
>>   create_resources(''notify'', $hash)
>> }
>>
>> class over inherits base {
>>   Notify[''msg''] { message => 
''meow'' }
>> }
>>
>> class { ''base'': }
>> class { ''over'': }
>> -----------------
> You can''t declare both classes, but you can override resources in
> class over, because we can merge hash values before calling create
> resource.
>
> The example here is obviously contrived, but I assume you have a
> bigger hash you want to merge. The merge function comes from stdlib:
>
> # don''t inherit base we can create the resources here instead.
> class over {
>    $local_setting = { ''msg'' =>  { message => 
''meow''} }
>    $newhash = merge($local_setting, $hash)
>    create_resource(''notify'', $newhash}
> }
>
> Thanks,
>
> Nan
>

-- 
Luke Bigum

Information Systems
Ph: +44 (0) 20 3192 2520
luke.bigum@lmax.com | http://www.lmax.com
LMAX, Yellow Building, 1A Nicholas Road, London W11 4AN

FX and CFDs are leveraged products that can result in losses exceeding
your deposit.  They are not suitable for everyone so please ensure you
fully understand the risks involved.  The information in this email is not
directed at residents of the United States of America or any other
jurisdiction where trading in CFDs and/or FX is restricted or prohibited
by local laws or regulations.

The information in this email and any attachment is confidential and is
intended only for the named recipient(s). The email may not be disclosed
or used by any person other than the addressee, nor may it be copied in
any way. If you are not the intended recipient please notify the sender
immediately and delete any copies of this message. Any unauthorised
copying, disclosure or distribution of the material in this e-mail is
strictly forbidden.

LMAX operates a multilateral trading facility.  Authorised and regulated 
by the Financial Services Authority (firm registration number 509778) and
is registered in England and Wales (number 06505809). 
Our registered address is Yellow Building, 1A Nicholas Road, London, W11
4AN.

-- 
You received this message because you are subscribed to the Google Groups
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Brian Gallew

2012-May-14 08:23 UTC

head link

Re: [Puppet Users] override resource created with create_resource function

Your requirements are moving you to the "must use an ENC or Hiera or Ruby
DSL" camp.  Puppet''s static typing will absolutely prevent you
from doing
this the way you seem to be thinking about it.  At this point, your easiest
answer is probably to use Hiera for looking up the value of this hash.

On Mon, May 14, 2012 at 1:08 AM, Luke Bigum <Luke.Bigum@lmax.com> wrote:
> Hi Nan,
>
> Thanks for the reply. I did start thinking about how I could use the merge
> function to achieve what I wanted. I was messing around with something like
> this (which obviously doesn''t work because of the inheritance
order):
>
> -----------------------
>
> $hash = { ''msg'' => { message =>
''woof'' } }
>
> class base($more_hash = undef) {
>  if ($more_hash) {
>    $real_hash = merge($more_hash, $hash)
>  } else {
>    $real_hash = $hash
>  }
>  create_resources(''notify'', $real_hash)
> }
>
> class over inherits base {
>  $more_hash = { ''msg'' => { message =>
''meow'' } }
> }
>
> class { ''base'': }
> class { ''over'': }
> ------------------------
>
> This question relates to my other post about a sysctl class. In my case
> I''d like the create_resources call to always reside within class
''base'' as
> that would be a standard declaration on all nodes - and that''s my
real
> problem. Class ''base'' can''t be in a standard
list of declarations if it''s
> ever going to take a parameter and be configurable. I have yet to find the
> perfect balance of common things to manage and configurability ;-)
>
> -Luke
>
>
> On 11/05/12 18:29, Nan Liu wrote:
>
>> On Fri, May 11, 2012 at 3:57 AM, Luke Bigum<Luke.Bigum@lmax.com> 
wrote:
>>
>>> Hello,
>>>
>>> Is it possible to override a resource that is created with the
>>> create_resource function?
>>>
>>> This manifest does not compile:
>>>
>>> ------------------
>>> $hash = { ''msg'' =>  { message => 
''woof'' } }
>>>
>>> class base {
>>>  create_resources(''notify'', $hash)
>>> }
>>>
>>> class over inherits base {
>>>  Notify[''msg''] { message => 
''meow'' }
>>> }
>>>
>>> class { ''base'': }
>>> class { ''over'': }
>>> -----------------
>>>
>> You can''t declare both classes, but you can override resources
in
>> class over, because we can merge hash values before calling create
>> resource.
>>
>> The example here is obviously contrived, but I assume you have a
>> bigger hash you want to merge. The merge function comes from stdlib:
>>
>> # don''t inherit base we can create the resources here instead.
>> class over {
>>   $local_setting = { ''msg'' =>  { message => 
''meow''} }
>>   $newhash = merge($local_setting, $hash)
>>   create_resource(''notify'', $newhash}
>> }
>>
>> Thanks,
>>
>> Nan
>>
>>
>
> --
> Luke Bigum
>
> Information Systems
> Ph: +44 (0) 20 3192 2520
> luke.bigum@lmax.com | http://www.lmax.com
> LMAX, Yellow Building, 1A Nicholas Road, London W11 4AN
>
>
> FX and CFDs are leveraged products that can result in losses exceeding
> your deposit.  They are not suitable for everyone so please ensure you
> fully understand the risks involved.  The information in this email is not
> directed at residents of the United States of America or any other
> jurisdiction where trading in CFDs and/or FX is restricted or prohibited
> by local laws or regulations.
>
> The information in this email and any attachment is confidential and is
> intended only for the named recipient(s). The email may not be disclosed
> or used by any person other than the addressee, nor may it be copied in
> any way. If you are not the intended recipient please notify the sender
> immediately and delete any copies of this message. Any unauthorised
> copying, disclosure or distribution of the material in this e-mail is
> strictly forbidden.
>
> LMAX operates a multilateral trading facility.  Authorised and regulated
> by the Financial Services Authority (firm registration number 509778) and
> is registered in England and Wales (number 06505809). Our registered
> address is Yellow Building, 1A Nicholas Road, London, W11
> 4AN.
>
> --
> You received this message because you are subscribed to the Google Groups
> "Puppet Users" group.
> To post to this group, send email to puppet-users@googlegroups.com.
> To unsubscribe from this group, send email to puppet-users+unsubscribe@**
> googlegroups.com <puppet-users%2Bunsubscribe@googlegroups.com>.
> For more options, visit this group at http://groups.google.com/**
>
group/puppet-users?hl=en<http://groups.google.com/group/puppet-users?hl=en>
> .
>
>
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Puppet users - May 2012 - override resource created with create_resource function

[Puppet Users] override resource created with create_resource function

Re: [Puppet Users] override resource created with create_resource function

Re: [Puppet Users] override resource created with create_resource function

Re: [Puppet Users] override resource created with create_resource function