Puppet users - Sep 2009 - Do resources support some form of inheritance/prototyping?

Hi!

Does anybody know, if resources can be inherited?

Example:

I would like to define three files with owner=root and group=bin and
mode=754.
To do that you can write:
file { "file1":
  owner=root,
  group=bin,
  mode=754,
}
file { "file2":
  owner=root,
  group=bin,
  mode=754,
}
file { "file3":
  owner=root,
  group=bin,
  mode=754,
}


As you can see there is a bit of redundancy there.
The more elegant way would be something like this (fictive code!):

file_prototype {
  owner=root,
  group=bin,
  mode=754,
}
file { "file1": include file_prototype, }
file { "file2": include file_prototype, }
file { "file3": include file_prototype, }

Does something similar to code above exists in puppet? Or any
workaround that does similar trick?

Thank you,
b.


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On Tue, Sep 15, 2009 at 5:39 PM, Bostjan Skufca
<bostjan.skufca@gmail.com>wrote:
>
> Hi!
>
> Does anybody know, if resources can be inherited?
>
> Example:
>
> I would like to define three files with owner=root and group=bin and
> mode=754.
> To do that you can write:
> file { "file1":
>  owner=root,
>  group=bin,
>  mode=754,
> }
> file { "file2":
>  owner=root,
>  group=bin,
>  mode=754,
> }
> file { "file3":
>  owner=root,
>  group=bin,
>  mode=754,
> }
>
>
> As you can see there is a bit of redundancy there.
>
You should do this with setting resource defaults in the current scope
instead like:

File { ensure => file, owner => root, group => bin, mode => 0754, }

file { ["file1", "file2", "file3"]: }

http://reductivelabs.com/trac/puppet/wiki/LanguageTutorial#resource-defaults



> The more elegant way would be something like this (fictive code!):
>
> file_prototype {
>  owner=root,
>  group=bin,
>  mode=754,
> }
> file { "file1": include file_prototype, }
> file { "file2": include file_prototype, }
> file { "file3": include file_prototype, }
>
> Does something similar to code above exists in puppet? Or any
> workaround that does similar trick?
>
> Thank you,
> b.
>
>
> >
>

-- 
Nigel Kersten
nigelk@google.com
System Administrator
Google Inc.

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2009/9/16 Nigel Kersten <nigelk@google.com>:
>
>
> On Tue, Sep 15, 2009 at 5:39 PM, Bostjan Skufca
<bostjan.skufca@gmail.com>
> wrote:
>>
>> Hi!
>>
>> Does anybody know, if resources can be inherited?
>>
>> Example:
>>
>> I would like to define three files with owner=root and group=bin and
>> mode=754.
>> To do that you can write:
>> file { "file1":
>>  owner=root,
>>  group=bin,
>>  mode=754,
>> }
>> file { "file2":
>>  owner=root,
>>  group=bin,
>>  mode=754,
>> }
>> file { "file3":
>>  owner=root,
>>  group=bin,
>>  mode=754,
>> }
>>
>>
>> As you can see there is a bit of redundancy there.
>
> You should do this with setting resource defaults in the current scope
> instead like:
>
> File { ensure => file, owner => root, group => bin, mode =>
0754, }
>
> file { ["file1", "file2", "file3"]: }
>
Or:

file { ["file1", "file2", "file3"]:
    owner=root,
    group=bin,
    mode=754,
}

Or using a define or articulated as:

    file {
        "file1":
            owner => "root",
            group => "bin",
            mode  => 754;
        "file2":
            owner => "root",
            group => "bin",
            mode  => 754;
        "file3":
            owner => "root",
            group => "bin",
            mode  => 754;
    }

Regards

James Turnbull

-- 
Author of:
* Pro Linux Systems Administration (http://tinyurl.com/linuxadmin)
* Pulling Strings with Puppet (http://tinyurl.com/pupbook)
* Pro Nagios 2.0 (http://tinyurl.com/pronagios)
* Hardening Linux (http://tinyurl.com/hardeninglinux)

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I believed that defaults could only be set for global scope. Funny:)

Thank you both for your hints!

b.


On Sep 16, 2:58 am, Nigel Kersten <nig...@google.com>
wrote:
> On Tue, Sep 15, 2009 at 5:39 PM, Bostjan Skufca
<bostjan.sku...@gmail.com>wrote:
>
>
>
>
>
> > Hi!
>
> > Does anybody know, if resources can be inherited?
>
> > Example:
>
> > I would like to define three files with owner=root and group=bin and
> > mode=754.
> > To do that you can write:
> > file { "file1":
> >  owner=root,
> >  group=bin,
> >  mode=754,
> > }
> > file { "file2":
> >  owner=root,
> >  group=bin,
> >  mode=754,
> > }
> > file { "file3":
> >  owner=root,
> >  group=bin,
> >  mode=754,
> > }
>
> > As you can see there is a bit of redundancy there.
>
> You should do this with setting resource defaults in the current scope
> instead like:
>
> File { ensure => file, owner => root, group => bin, mode =>
0754, }
>
> file { ["file1", "file2", "file3"]: }
>
> http://reductivelabs.com/trac/puppet/wiki/LanguageTutorial#resource-d...
>
>
>
> > The more elegant way would be something like this (fictive code!):
>
> > file_prototype {
> >  owner=root,
> >  group=bin,
> >  mode=754,
> > }
> > file { "file1": include file_prototype, }
> > file { "file2": include file_prototype, }
> > file { "file3": include file_prototype, }
>
> > Does something similar to code above exists in puppet? Or any
> > workaround that does similar trick?
>
> > Thank you,
> > b.
>
> --
> Nigel Kersten
> nig...@google.com
> System Administrator
> Google Inc.
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2009/9/16 James Turnbull
<james@lovedthanlost.net>:
> file { ["file1", "file2", "file3"]:
>    owner=root,
>    group=bin,
>    mode=754,
> }
That should read:

file { ["file1", "file2", "file3"]:
   owner => root,
   group => bin,
   mode => 754,
}

Regards

James Turnbull

-- 
Author of:
* Pro Linux Systems Administration (http://tinyurl.com/linuxadmin)
* Pulling Strings with Puppet (http://tinyurl.com/pupbook)
* Pro Nagios 2.0 (http://tinyurl.com/pronagios)
* Hardening Linux (http://tinyurl.com/hardeninglinux)

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On Tue, Sep 15, 2009 at 6:46 PM, Bostjan Skufca
<bostjan.skufca@gmail.com>wrote:
>
> I believed that defaults could only be set for global scope. Funny:)
>
> Thank you both for your hints!
>
I actually thought this too, but it''s for the current and inherited
scopes
it seems.

Moving to declaring File defaults in each class has made my manifests *so*
much more readable....


>
> b.
>
>
> On Sep 16, 2:58 am, Nigel Kersten <nig...@google.com> wrote:
> > On Tue, Sep 15, 2009 at 5:39 PM, Bostjan Skufca <
> bostjan.sku...@gmail.com>wrote:
> >
> >
> >
> >
> >
> > > Hi!
> >
> > > Does anybody know, if resources can be inherited?
> >
> > > Example:
> >
> > > I would like to define three files with owner=root and group=bin
and
> > > mode=754.
> > > To do that you can write:
> > > file { "file1":
> > >  owner=root,
> > >  group=bin,
> > >  mode=754,
> > > }
> > > file { "file2":
> > >  owner=root,
> > >  group=bin,
> > >  mode=754,
> > > }
> > > file { "file3":
> > >  owner=root,
> > >  group=bin,
> > >  mode=754,
> > > }
> >
> > > As you can see there is a bit of redundancy there.
> >
> > You should do this with setting resource defaults in the current scope
> > instead like:
> >
> > File { ensure => file, owner => root, group => bin, mode
=> 0754, }
> >
> > file { ["file1", "file2", "file3"]: }
> >
> >
http://reductivelabs.com/trac/puppet/wiki/LanguageTutorial#resource-d...
> >
> >
> >
> > > The more elegant way would be something like this (fictive
code!):
> >
> > > file_prototype {
> > >  owner=root,
> > >  group=bin,
> > >  mode=754,
> > > }
> > > file { "file1": include file_prototype, }
> > > file { "file2": include file_prototype, }
> > > file { "file3": include file_prototype, }
> >
> > > Does something similar to code above exists in puppet? Or any
> > > workaround that does similar trick?
> >
> > > Thank you,
> > > b.
> >
> > --
> > Nigel Kersten
> > nig...@google.com
> > System Administrator
> > Google Inc.
> >
>

-- 
Nigel Kersten
nigelk@google.com
System Administrator
Google Inc.

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