Puppet users - Apr 2008 - Question: Do all puppetd run at the same time?

(I know more questions... :-))

I know the default for puppetd is to check puppetmasterd every half
hour, but my question does  each puppetd check at the same time?  Or
does it depend when puppetd is started or like a cronjob does it run
at the 1/2 hour and hour mark?  Is there some randomness to the times
they run?

My point is if they all run at the same time then if you have a large
amount of puppetd running the puppetmaster will get overtaxed during
those peek times.

Even if they do not all run at the same time can a randomness feature
be introduced (ie have an option to allow -+ seconds from the normal
internal?)  for each puppetd?

-L
--
Larry Ludwig
Empowering Media
1-866-792-0489 x600
Managed and Unmanaged Xen VPSes
http://www.hostcube.com/
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Larry Ludwig wrote:
> Even if they do not all run at the same time can a randomness feature
> be introduced (ie have an option to allow -+ seconds from the normal
> internal?)  for each puppetd?
See the splay option
(http://reductivelabs.com/trac/puppet/wiki/ConfigurationReference).

Regards

James Turnbull

- --
James Turnbull (james@lovedthanlost.net)
- --
Author of:
- - Pulling Strings with Puppet
(http://www.amazon.com/gp/product/1590599780/)
- - Pro Nagios 2.0
(http://www.amazon.com/gp/product/1590596099/)
- - Hardening Linux
(http://www.amazon.com/gp/product/1590594444/)
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thanks I didn''t see this option.

so my guess is correct that all puppetd by default run at the same
time unless this option is set?


On Apr 12, 1:59 pm, James Turnbull <ja...@lovedthanlost.net>
wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Larry Ludwig wrote:
> > Even if they do not all run at the same time can a randomness feature
> > be introduced (ie have an option to allow -+ seconds from the normal
> > internal?)  for each puppetd?
>
> See the splay option
> (http://reductivelabs.com/trac/puppet/wiki/ConfigurationReference).
>
> Regards
>
> James Turnbull
>
> - --
> James Turnbull (ja...@lovedthanlost.net)
> - --
> Author of:
> - - Pulling Strings with Puppet
> (http://www.amazon.com/gp/product/1590599780/)
> - - Pro Nagios 2.0
> (http://www.amazon.com/gp/product/1590596099/)
> - - Hardening Linux
> (http://www.amazon.com/gp/product/1590594444/)
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.7 (MingW32)
> Comment: Using GnuPG with Mozilla -http://enigmail.mozdev.org
>
> iD8DBQFIAPiU9hTGvAxC30ARAobrAKCwWhkUIO03tTNc3iqYy8XK7iVyaACgn7cx
> 5VKQHyElRwW8UprHre1Cubo> =nqOV
> -----END PGP SIGNATURE-----
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Yes but usually clients will drift apart due to either manual  
intervention or just differences in their manifests.  It''s actually  
pretty hard to keep them synchronized if that''s a goal.

-Blake


On Apr 12, 2008, at 11:44 AM, Larry Ludwig wrote:
>
> thanks I didn''t see this option.
>
> so my guess is correct that all puppetd by default run at the same
> time unless this option is set?
>
>
> On Apr 12, 1:59 pm, James Turnbull <ja...@lovedthanlost.net> wrote:
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA1
>>
>> Larry Ludwig wrote:
>>> Even if they do not all run at the same time can a randomness  
>>> feature
>>> be introduced (ie have an option to allow -+ seconds from the
normal
>>> internal?)  for each puppetd?
>>
>> See the splay option
>> (http://reductivelabs.com/trac/puppet/wiki/ConfigurationReference).
>>
>> Regards
>>
>> James Turnbull
>>
>> - --
>> James Turnbull (ja...@lovedthanlost.net)
>> - --
>> Author of:
>> - - Pulling Strings with Puppet
>> (http://www.amazon.com/gp/product/1590599780/)
>> - - Pro Nagios 2.0
>> (http://www.amazon.com/gp/product/1590596099/)
>> - - Hardening Linux
>> (http://www.amazon.com/gp/product/1590594444/)
>> -----BEGIN PGP SIGNATURE-----
>> Version: GnuPG v1.4.7 (MingW32)
>> Comment: Using GnuPG with Mozilla -http://enigmail.mozdev.org
>>
>> iD8DBQFIAPiU9hTGvAxC30ARAobrAKCwWhkUIO03tTNc3iqYy8XK7iVyaACgn7cx
>> 5VKQHyElRwW8UprHre1Cubo>> =nqOV
>> -----END PGP SIGNATURE-----
> >

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actually I don''t want them to update at the same time is the goal.

On Apr 12, 3:16 pm, Blake Barnett <sha...@gmail.com>
wrote:
> Yes but usually clients will drift apart due to either manual
> intervention or just differences in their manifests.  It''s
actually
> pretty hard to keep them synchronized if that''s a goal.
>
> -Blake
>
> On Apr 12, 2008, at 11:44 AM, Larry Ludwig wrote:
>
>
>
> > thanks I didn''t see this option.
>
> > so my guess is correct that all puppetd by default run at the same
> > time unless this option is set?
>
> > On Apr 12, 1:59 pm, James Turnbull <ja...@lovedthanlost.net>
wrote:
> >> -----BEGIN PGP SIGNED MESSAGE-----
> >> Hash: SHA1
>
> >> Larry Ludwig wrote:
> >>> Even if they do not all run at the same time can a randomness
> >>> feature
> >>> be introduced (ie have an option to allow -+ seconds from the
normal
> >>> internal?)  for each puppetd?
>
> >> See the splay option
> >>
(http://reductivelabs.com/trac/puppet/wiki/ConfigurationReference).
>
> >> Regards
>
> >> James Turnbull
>
> >> - --
> >> James Turnbull (ja...@lovedthanlost.net)
> >> - --
> >> Author of:
> >> - - Pulling Strings with Puppet
> >> (http://www.amazon.com/gp/product/1590599780/)
> >> - - Pro Nagios 2.0
> >> (http://www.amazon.com/gp/product/1590596099/)
> >> - - Hardening Linux
> >> (http://www.amazon.com/gp/product/1590594444/)
> >> -----BEGIN PGP SIGNATURE-----
> >> Version: GnuPG v1.4.7 (MingW32)
> >> Comment: Using GnuPG with Mozilla -http://enigmail.mozdev.org
>
> >> iD8DBQFIAPiU9hTGvAxC30ARAobrAKCwWhkUIO03tTNc3iqYy8XK7iVyaACgn7cx
> >> 5VKQHyElRwW8UprHre1Cubo> >> =nqOV
> >> -----END PGP SIGNATURE-----
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On Apr 12, 2008, at 12:46 PM, Larry Ludwig wrote:
> (I know more questions... :-))
>
> I know the default for puppetd is to check puppetmasterd every half
> hour, but my question does  each puppetd check at the same time?  Or
> does it depend when puppetd is started or like a cronjob does it run
> at the 1/2 hour and hour mark?  Is there some randomness to the times
> they run?

Puppet clients run every half an hour based on when they are started.   
Given the unlikelihood of rebooting your whole network at once (unless  
you''re running a cluster), you should see a relatively even load  
across the runinterval.

-- 
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with company. -- Gian Vincenzo Gravina
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> Puppet clients run every half an hour based on when they are started.
> Given the unlikelihood of rebooting your whole network at once (unless
> you''re running a cluster), you should see a relatively even load
> across the runinterval.
Well if say all VPSes are restarted on a node (VPS node that is) then
yes they will all be running at the same time.

Kernel upgrades that require a reboot will make them sync up to be
either close to each other.  So it is possible.

-L
--
Larry Ludwig
Empowering Media
1-866-792-0489 x600
Managed and Unmanaged Xen VPSes
http://www.hostcube.com/
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Hi Larry,

I think that you''ll see that over time, this method have its way of
balancing the load over your server.
there are a lot of factors, for example your hardware, the host specific
manifest, the server load at that specific time etc.. so even if most
servers starts more or less at the same time, I have seen in my environment
that after some time the load is more or less average across the 30 minutes.

Ohad

On Mon, Apr 14, 2008 at 4:11 AM, Larry Ludwig <larrylud@gmail.com> wrote:
>
> > Puppet clients run every half an hour based on when they are started.
> > Given the unlikelihood of rebooting your whole network at once (unless
> > you''re running a cluster), you should see a relatively even
load
> > across the runinterval.
>
> Well if say all VPSes are restarted on a node (VPS node that is) then
> yes they will all be running at the same time.
>
> Kernel upgrades that require a reboot will make them sync up to be
> either close to each other.  So it is possible.
>
> -L
> --
> Larry Ludwig
> Empowering Media
> 1-866-792-0489 x600
> Managed and Unmanaged Xen VPSes
> http://www.hostcube.com/
> >
>
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OoO En cette soirée bien amorcée  du dimanche 13 avril 2008, vers 22:11,
Larry Ludwig <larrylud@gmail.com> disait:
>> Puppet clients run every half an hour based on when they are started.
>> Given the unlikelihood of rebooting your whole network at once (unless
>> you''re running a cluster), you should see a relatively even
load
>> across the runinterval.
> Well if say all VPSes are restarted on a node (VPS node that is) then
> yes they will all be running at the same time.
On VPS, I choosed  to not run puppet as a daemon on  all nodes. I have a
crontab like this:
 vsomething -q vserver --running -- exec /usr/sbin/puppetd --onetime
--no-daemonize

This will call puppet in sequence on each vserver.
-- 
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