Puppet users - Feb 2013 - How to check service status to write monit snippet.

Hi all.
 I''m working on monit module. I have an array of services to configure 
monit via ENC.
 I need a consistent module logic so services arriving as input parameter 
must running on node agent.

 I''m trying to find out if there is services running to configure monit
snippets.
 So, The snippet will be only written into /etc/monit/conf.d when service 
is running.

 Let''s say an input parameter like :

  services => [''ntp'',''ssh'']

 But ntp service is not running. In that case I need the snippet for
''ntp''
service not be written on conf.d 

 Is there simple way to do it ?.


 Thanks in advanced, eduardo.
 

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Hi,

I''m almost certain I don''t really understand your problem, but
here''s
the most simple answer, so we can work from there:

Your ENC should set a variable value for each service on each node, e.g.:

$ssh => true
$ntp => false
...

If a given value is true, include the snippet. If not, don''t.

On 02/23/2013 06:33 PM, eduardo wrote:
>  Hi all.
>  I''m working on monit module. I have an array of services to
configure
> monit via ENC.
>  I need a consistent module logic so services arriving as input
> parameter must running on node agent.
> 
>  I''m trying to find out if there is services running to configure
monit
> snippets.
>  So, The snippet will be only written into /etc/monit/conf.d when
> service is running.
> 
>  Let''s say an input parameter like :
> 
>   services => [''ntp'',''ssh'']
> 
>  But ntp service is not running. In that case I need the snippet for
> ''ntp'' service not be written on conf.d
> 
>  Is there simple way to do it ?.
> 
> 
>  Thanks in advanced, eduardo.
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Thanks felix, 
 I''m trying to do a validator for monit module.
 I''m pretending down services are not controlled by monit, avoiding
false
alarm from monit service.

 I was work around with something like :

class monit($services) {

 include monit::checkservice, 
            monit::snippet

 monit::checkservice::checksrv{ $::monit::services : }

------

class monit::checkservice {
 define checksrv {
   notify { "Checking service $name":}
   service { $name:
       noop => true,
       hasstatus => false,
       status => "/usr/local/bin/check_service.sh ${name}",
   }
 }
}

 where $services is array of services from ENC.
 But it have been unsuccessfully. I can see notifies messages foreach 
element from array but status script is not executed like i expected 
foreach item.


 regards, eduardo.




El sábado, 23 de febrero de 2013 12:33:51 UTC-5, eduardo
escribió:
>
>  Hi all.
>  I''m working on monit module. I have an array of services to
configure
> monit via ENC.
>  I need a consistent module logic so services arriving as input parameter 
> must running on node agent.
>
>  I''m trying to find out if there is services running to configure
monit
> snippets.
>  So, The snippet will be only written into /etc/monit/conf.d when service 
> is running.
>
>  Let''s say an input parameter like :
>
>   services => [''ntp'',''ssh'']
>
>  But ntp service is not running. In that case I need the snippet for
''ntp''
> service not be written on conf.d 
>
>  Is there simple way to do it ?.
>
>
>  Thanks in advanced, eduardo.
>  
>
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Hi,

that''s actually a sound implementation.

Try this for debugging:

$comma_separated_list = inline_template("
<%= scope.lookupvar("::monit::services") * '', ''
%>")

notify { "Services list: $comma_separated_list": }

Inside a class, not inside the defined type.

Cheers,
Felix

On 02/25/2013 03:52 PM, eduardo wrote:
>  Thanks felix,
>  I''m trying to do a validator for monit module.
>  I''m pretending down services are not controlled by monit,
avoiding
> false alarm from monit service.
> 
>  I was work around with something like :
> 
> class monit($services) {
> 
>  include monit::checkservice,
>             monit::snippet
> 
>  monit::checkservice::checksrv{ $::monit::services : }
> 
> ------
> 
> class monit::checkservice {
>  define checksrv {
>    notify { "Checking service $name":}
>    service { $name:
>        noop => true,
>        hasstatus => false,
>        status => "/usr/local/bin/check_service.sh ${name}",
>    }
>  }
> }
> 
>  where $services is array of services from ENC.
>  But it have been unsuccessfully. I can see notifies messages foreach
> element from array but status script is not executed like i expected
> foreach item.
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On 02/23/2013 06:33 PM, eduardo wrote:
>  Hi all.
>  I''m working on monit module. I have an array of services to
configure
> monit via ENC.
>  I need a consistent module logic so services arriving as input
> parameter must running on node agent.
> 
>  I''m trying to find out if there is services running to configure
monit
> snippets.
>  So, The snippet will be only written into /etc/monit/conf.d when
> service is running.
> 
>  Let''s say an input parameter like :
> 
>   services => [''ntp'',''ssh'']
> 
>  But ntp service is not running. In that case I need the snippet for
> ''ntp'' service not be written on conf.d
> 
>  Is there simple way to do it ?.
Either you write your own facts that state if the service is running, or
use exported resources from modules that manage services.

First method isn''t bullet proof, because if services are not running
and
they are supposed to, monit checks won''t be activated in the first
place.

Second method forces other modules to add support to your specific monit
module implementation, so module won''t be reusable. But I would go the
latter path.

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