Puppet users - Feb 2011 - Multiple external commands with puppet

Hi,

I want to execute multiple sed commands using the exec commands within
puppet. I can only setup one command parameter. For now i have to give
a long list of commands separated with ";"  in order to use the single
command parameter. I know there are other efficient ways to solve this
problem. But my requirement is such i need to execute multiple
commands using the exec tool within  puppet. Any one have who can give
me a hint how this problem could be solved.

NOTE: I need only the command parameter of exec. I dont need the other
parameters

Regards,
Kevin

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Are you able to group these sed statements into a script and pass arguments to
the script to do whatever set of executions are needed for that specific
dataset?

I may not understand your ''need'' exactly, either. Can you
explain more of what you are trying to accomplish and less about what
you''ve chosen to accomplish it with. May help stir-up better answers.

-Mark

On Feb 3, 2011, at 11:23 AM, linuxbsdfreak wrote:
> Hi,
> 
> I want to execute multiple sed commands using the exec commands within
> puppet. I can only setup one command parameter. For now i have to give
> a long list of commands separated with ";"  in order to use the
single
> command parameter. I know there are other efficient ways to solve this
> problem. But my requirement is such i need to execute multiple
> commands using the exec tool within  puppet. Any one have who can give
> me a hint how this problem could be solved.
> 
> NOTE: I need only the command parameter of exec. I dont need the other
> parameters
> 
> Regards,
> Kevin
> 
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While it''s perfectly appropriate to have multiple exec{} or a single
exec{} with a multi-line command in your puppet manifest, once you reach a
certain level of complexity you almost invariably want to switch to a
file{"/usr/local/scripts": ...}
exec{"/usr/local/scripts/doit": ...} model.  The script can be
trivially customized for the local system by puppet giving you great
flexibility, while allowing more complex code paths or alternate languages to be
easily used.

On Feb 3, 2011, at 8:29 AM, Mark Stanislav wrote:
> Are you able to group these sed statements into a script and pass arguments
to the script to do whatever set of executions are needed for that specific
dataset?
> 
> I may not understand your ''need'' exactly, either. Can you
explain more of what you are trying to accomplish and less about what
you''ve chosen to accomplish it with. May help stir-up better answers.
> 
> -Mark
> 
> On Feb 3, 2011, at 11:23 AM, linuxbsdfreak wrote:
> 
>> Hi,
>> 
>> I want to execute multiple sed commands using the exec commands within
>> puppet. I can only setup one command parameter. For now i have to give
>> a long list of commands separated with ";"  in order to use
the single
>> command parameter. I know there are other efficient ways to solve this
>> problem. But my requirement is such i need to execute multiple
>> commands using the exec tool within  puppet. Any one have who can give
>> me a hint how this problem could be solved.
>> 
>> NOTE: I need only the command parameter of exec. I dont need the other
>> parameters
>> 
>> Regards,
>> Kevin
>> 
>> -- 
>> 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
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>> For more options, visit this group at
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>> 
> 
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> 
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On Thu, Feb 3, 2011 at 08:23, linuxbsdfreak <linuxbsdfreak@gmail.com>
wrote:
> I want to execute multiple sed commands using the exec commands within
> puppet. I can only setup one command parameter. For now i have to give
> a long list of commands separated with ";"  in order to use the
single
> command parameter. I know there are other efficient ways to solve this
> problem. But my requirement is such i need to execute multiple
> commands using the exec tool within  puppet. Any one have who can give
> me a hint how this problem could be solved.
>
> NOTE: I need only the command parameter of exec. I dont need the other
> parameters
So, uh, your constraints are kind of strange, and suggest to me that
there is something else you are not telling us about what you are
trying to do that we should probably know.  It would be a big help if
you could post the manifest that is causing trouble somewhere.

Anyhow, you can do this a bunch of ways; can you just pass your
multiple operations to the single sed instance?  That should behave
the same way as multiple sed instances, in pretty much every case I
can imagine.

If that isn''t possible for some reason, you can always fall back to
invoking the shell:

  exec { "example":
    command => "/bin/sh -c ''sed -e s@very@strange@ | sed -e
s@choice@here@''"
  }

Finally, as already noted, installing the script as an extra file
would be a really good way to make this easier to manage in future and
all.

Regards,
    Daniel

PS: If you are trying to do multiple, independent things in the one
command, please don''t.  Running multiple exec operations to mutate the
file, and making sure they are all equipped with an appropriate
''unless'' or ''onlyif'' is much better in the
long term.

-- 
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✉ Daniel Pittman <daniel@puppetlabs.com>
✆ Contact me via gtalk, email, or phone: +1 (877) 575-9775
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