Puppet users - Jul 2007 - Does Puppet ensure that a service is up and running?

Just curious as to the functionality of puppet. Does Puppet ensure that a
service is up and running as long as puppet is running?
   
  Ie, I want to make sure ssh is always running, if for some reason ssh
get''s shut down, does puppet start it back up when it does
it''s config sync run?
   
  Thanks!

       
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Pinpoint customers who are looking for what you sell. 

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If your service is configured to be running and Puppet sees that it''s
not, it will start it.
 
Puppet isn''t a dedicated monitoring tool though - I''d
recommend Monit
for that.
 
James


________________________________

	From: puppet-users-bounces@madstop.com
[mailto:puppet-users-bounces@madstop.com] On Behalf Of Brent Clements
	Sent: Thursday, 5 July 2007 1:38 PM
	To: puppet-users@madstop.com
	Subject: [Puppet-users] Does Puppet ensure that a service is up
and running?
	
	
	Just curious as to the functionality of puppet. Does Puppet
ensure that a service is up and running as long as puppet is running?
	 
	Ie, I want to make sure ssh is always running, if for some
reason ssh get''s shut down, does puppet start it back up when it does
it''s config sync run?
	 
	Thanks!

	
________________________________

	Pinpoint customers
<http://us.rd.yahoo.com/evt=48250/*http://searchmarketing.yahoo.com/arp/
sponsoredsearch_v9.php?o=US2226&cmp=Yahoo&ctv=AprNI&s=Y&s2=EM&b=50>
who
are looking for what you sell. 


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Definitely monit + puppet. You can even have puppet monitoring that monit is
running, and monit monitoring puppet...
 
puppet :
        service {
                "monit":
                        ensure => running,
                        enable => true;
        }

monit :
check process puppetd with pidfile /var/run/puppet/puppetd.pid
        start program = "/etc/init.d/puppet start"
        stop program = "/etc/init.d/puppet stop"

(you would have also to monitor puppetmaster)
 
Jean-François
 
________________________________

De : puppet-users-bounces@madstop.com [mailto:puppet-users-bounces@madstop.com]
De la part de HARRIS Jimmy (AXA-Tech-AU)
Envoyé : jeudi 5 juillet 2007 05:43
À : Puppet User Discussion
Objet : Re: [Puppet-users] Does Puppet ensure that a service is up andrunning?


If your service is configured to be running and Puppet sees that it''s
not, it will start it.
 
Puppet isn''t a dedicated monitoring tool though - I''d
recommend Monit for that.
 
James


________________________________

	From: puppet-users-bounces@madstop.com
[mailto:puppet-users-bounces@madstop.com] On Behalf Of Brent Clements
	Sent: Thursday, 5 July 2007 1:38 PM
	To: puppet-users@madstop.com
	Subject: [Puppet-users] Does Puppet ensure that a service is up and running?
	
	
	Just curious as to the functionality of puppet. Does Puppet ensure that a
service is up and running as long as puppet is running?
	 
	Ie, I want to make sure ssh is always running, if for some reason ssh
get''s shut down, does puppet start it back up when it does
it''s config sync run?
	 
	Thanks!

	
________________________________

	Pinpoint customers
<http://us.rd.yahoo.com/evt=48250/*http://searchmarketing.yahoo.com/arp/sponsoredsearch_v9.php?o=US2226&cmp=Yahoo&ctv=AprNI&s=Y&s2=EM&b=50>
who are looking for what you sell.





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the intended recipient you must not use, distribute or copy this 
email.  If you have received this email in error please notify the 
sender immediately and delete this email. Any views expressed in this 
email are not necessarily the views of AXA-Tech Australia.   Thank you.
**********************************************************************************


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On 7/5/2007 2:25 AM, BUSTARRET, Jean-francois wrote:
> Definitely monit + puppet. You can even have puppet monitoring that monit
is running, and monit monitoring puppet...
>  
> puppet :
>         service {
>                 "monit":
>                         ensure => running,
>                         enable => true;
>         }
> 
> monit :
> check process puppetd with pidfile /var/run/puppet/puppetd.pid
>         start program = "/etc/init.d/puppet start"
>         stop program = "/etc/init.d/puppet stop"
> 
> (you would have also to monitor puppetmaster)
And if you''re not running monit, you can do it purely with cron. Mind 
any line breaks that may have crept in, there may be Linux-specific 
flags to ps, and you can adapt this for puppetmasterd, too:

# Bulletproof puppetd -- if puppetd dies, cron will restart it at
# the top of the hour. In the unlikely event that cron dies, puppetd
# will restart it on its next run. We''re screwed if both cron and
# puppetd die, though.
cron { restart-puppet:
     command => "if [ -e /var/run/puppetd.pid ]; then ps uw -p `cat 
/var/run/puppetd.pid` | grep -q '' ruby /usr/sbin/puppetd'' ||
(rm
/var/run/puppetd.pid; /etc/init.d/puppet start); fi",
     user    => root,
     minute  => 0,
}

service { cron:
     ensure => running,
     enable => true,
}

-- 
Mike Renfro  / R&D Engineer, Center for Manufacturing Research,
931 372-3601 / Tennessee Technological University -- renfro@tntech.edu

Hi all, I''m new to this list and to puppet. I can make a contribution
here so here I am :-)

Mike Renfro escribió:
> On 7/5/2007 2:25 AM, BUSTARRET, Jean-francois wrote:
>> Definitely monit + puppet. You can even have puppet monitoring that
monit is running, and monit monitoring puppet...
>>  
>> puppet :
[...]
> # Bulletproof puppetd -- if puppetd dies, cron will restart it at
> # the top of the hour. In the unlikely event that cron dies, puppetd
> # will restart it on its next run. We''re screwed if both cron and
> # puppetd die, though.
What I''ve done in this cases is to make some simple bash script that is
run from ''init'' directly, in ''respawn'' mode,
adding a line in
/etc/inittab similar to this:

C0:respawn:2345:/usr/local/sbin/check_puppetd.sh

Inside the script I can have something like:

while [ 1 ]
do
	EXPR=`ps ax | grep puppetd | grep -v grep | grep -v $0 | wc -l`
	if [ "$EXPR" == "0" ]
	then
		/etc/init.d/puppetd restart
	fi

	sleep 60
done

If for some reason the script dies, init will re-execute it. If for some
reason init dies....well, you''re screwed :-)

Best regards
-- 
Lucas Di Pentima - Santa Fe, Argentina - Jabber ID: lucas@lunix.com.ar
LUNIX: Soluciones en GNU/Linux - http://www.lunix.com.ar
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At work we run puppetmasterd and puppetd under daemontools on >200 machines
and it works well.  Avoids having to use monit/cron and less intrusive/more
flexible than using /etc/inittab.

-- 
Jos Backus
jos at catnook.com

Quoting Jos Backus <jos@catnook.com>:
> At work we run puppetmasterd and puppetd under daemontools on >200
machines
> and it works well.  Avoids having to use monit/cron and less intrusive/more
> flexible than using /etc/inittab.
>
Please ignore my ignorance, but what is ''daemontools''?  How
does using
this avoid using monit/cron? How would /etc/inittab play into this?

Maybe all my questions will be answered by the first question! :)

Thanks for the feedback.

Mike B.

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barsalou <barjunk@attglobal.net> writes:
> Please ignore my ignorance, but what is ''daemontools''?
http://cr.yp.to/daemontools.html

I''m tempted to do the same thing; we already use daemontools for a ton
of
stuff.  Although we''ll probably replace daemontools with something with
a
slightly saner license at some point in our environment.

-- 
Russ Allbery (rra@stanford.edu)             <http://www.eyrie.org/~eagle/>

Quoting Russ Allbery <rra@stanford.edu>:
> barsalou <barjunk@attglobal.net> writes:
>
>> Please ignore my ignorance, but what is
''daemontools''?
>
> http://cr.yp.to/daemontools.html
>
> I''m tempted to do the same thing; we already use daemontools for a
ton of
> stuff.  Although we''ll probably replace daemontools with something
with a
> slightly saner license at some point in our environment.
>
Thanks for that.


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Russ Allbery wrote:
> barsalou <barjunk@attglobal.net> writes:
> 
>> Please ignore my ignorance, but what is
''daemontools''?
> 
> http://cr.yp.to/daemontools.html
> 
> I''m tempted to do the same thing; we already use daemontools for a
ton of
> stuff.  Although we''ll probably replace daemontools with something
with a
> slightly saner license at some point in our environment.
You might look into runit.  I believe you can just use the 
daemontools-alike programs, without actually going so far as to replace 
init.

http://smarden.org/runit/

Jordan

On Thu, Jul 05, 2007 at 08:48:54AM -0800, barsalou
wrote:
> Quoting Jos Backus <jos@catnook.com>:
> 
>> At work we run puppetmasterd and puppetd under daemontools on >200 
>> machines
>> and it works well.  Avoids having to use monit/cron and less 
>> intrusive/more
>> flexible than using /etc/inittab.
>> 
> 
> Please ignore my ignorance, but what is ''daemontools''? 
How does using this
> avoid using monit/cron? How would /etc/inittab play into this?
 
daemontools is a collection of tools for managing UNIX services.

See http://cr.yp.to/daemontools.html for details.

Sample run file:

    #!/bin/sh

    exec 2>&1

    user=release

    # Allow user to control this service
    chown $user supervise supervise/control supervise/ok

    exec \
    /usr/sbin/puppetmasterd \
	--verbose \
	--debug \
	--manifest=/etc/puppet/manifests/site.pp \
	--templatedir=/cc/ops/config/puppet/templates \
	--logdest=/var/log/puppet/puppetmaster.log

-- 
Jos Backus
jos at catnook.com