Puppet users - Mar 2013 - Reference first member of array in manifest

Hi all,

How do I reference the first member in the $ntpd_servers array in the code 
below. Any pointers to the official Puppet (or Ruby?) documentation would 
be much appreciated.

class ntp {

  $ntpd_servers = [ "0.rhel.pool.ntp.org",
"1.rhel.pool.ntp.org",
"2.rhel.pool.ntp.org" ]

  exec { "set_clock":  
    subscribe   => File["/etc/ntp.conf"],  
    command     => "/sbin/service ntpd stop && /sbin/ntpdate 
<FIRST_MEMBER_OF_ARRAY> && /sbin/service ntpd start",  
    refreshonly => true;  
  }  

}

Regards,
Willem.

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It''s just normal subscript notation.

$ntpd_servers[0]

http://docs.puppetlabs.com/puppet/3/reference/lang_datatypes.html#arrays

Just as a note, ntpd has an option, -g I believe, that''s used to set
the
time and start the service all at once. I think it''s a little preferred
over ntpdate these days. Not sure what flavor of linux you''re running,
but
on centos, that flag is default when run through he init script. It would 
probably be cleaner for you if you could use that flag and then just a 
service resource subscribed to the conf file.

On Tuesday, March 26, 2013 6:01:44 AM UTC-7, Willem Bos
wrote:
>
> Hi all,
>
> How do I reference the first member in the $ntpd_servers array in the code 
> below. Any pointers to the official Puppet (or Ruby?) documentation would 
> be much appreciated.
>
> class ntp {
>
>   $ntpd_servers = [ "0.rhel.pool.ntp.org",
"1.rhel.pool.ntp.org", "
> 2.rhel.pool.ntp.org" ]
>
>   exec { "set_clock":  
>     subscribe   => File["/etc/ntp.conf"],  
>     command     => "/sbin/service ntpd stop &&
/sbin/ntpdate
> <FIRST_MEMBER_OF_ARRAY> && /sbin/service ntpd start",  
>     refreshonly => true;  
>   }  
>
> }
>
> Regards,
> Willem.
>
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O man, I should have thought of that myself... Thanks.

I didn''t want to use ''-g'' as it enables large time
changes but I - just
know - found out that is the default on RHEL6. So I''ll probably just
add
''-g'' to /etc/sysconfig/ntpd on RHEL5 also :-)

Regards,
Willem.

On Tuesday, March 26, 2013 5:38:04 PM UTC+1, Ellison Marks
wrote:
>
> It''s just normal subscript notation.
>
> $ntpd_servers[0]
>
> http://docs.puppetlabs.com/puppet/3/reference/lang_datatypes.html#arrays
>
> Just as a note, ntpd has an option, -g I believe, that''s used to
set the
> time and start the service all at once. I think it''s a little
preferred
> over ntpdate these days. Not sure what flavor of linux you''re
running, but
> on centos, that flag is default when run through he init script. It would 
> probably be cleaner for you if you could use that flag and then just a 
> service resource subscribed to the conf file.
>
> On Tuesday, March 26, 2013 6:01:44 AM UTC-7, Willem Bos wrote:
>>
>> Hi all,
>>
>> How do I reference the first member in the $ntpd_servers array in the 
>> code below. Any pointers to the official Puppet (or Ruby?)
documentation
>> would be much appreciated.
>>
>> class ntp {
>>
>>   $ntpd_servers = [ "0.rhel.pool.ntp.org",
"1.rhel.pool.ntp.org", "
>> 2.rhel.pool.ntp.org" ]
>>
>>   exec { "set_clock":  
>>     subscribe   => File["/etc/ntp.conf"],  
>>     command     => "/sbin/service ntpd stop &&
/sbin/ntpdate
>> <FIRST_MEMBER_OF_ARRAY> && /sbin/service ntpd
start",
>>     refreshonly => true;  
>>   }  
>>
>> }
>>
>> Regards,
>> Willem.
>>
>
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