Re: [Puppet Users] Re: howto trigger action on another client

Andreas Kuntzagk
Fri, 24 Jun 2011 13:39:12 -0000

jcbollinger wrote:
>
> On Jun 24, 3:14 am, Andreas Kuntzagk <andreas.kuntz...@mdc-berlin.de>
> wrote:
>> Hi,
>>
>> I want to automate installation of GridEngine with puppet. GE comes
with some
>> prepared script for automatic installation.
>> Unfortunately this is to be run on the GE master to install the
executions host
>> (=clients).  (This then will run some commands on the exec host via
ssh)
>> So from puppet''s perspective if an agent on an execution host
notices that GE is
>> not installed but should it has to tell the agent on the GE master to
run the
>> install script.
>> Is there an easy (puppet) way to do it?
>> My idea is to have the exec host write its name into a file
"hosts_to_install"
>> on a common NFS and have the master check that file. But maybe there
are better
>> ways.
>> Does anybody here has some other GE related recipes?
>
>
> Exported resources are the Puppet means for one node to provide
> resources for another.  In this case, the execution host could export
> an Exec resource for the master to collect and apply.

Hmm, in the (very short) time I''ve been working with puppet I have not
stumbled
across exported resources. Any pointer where I should start reading?

> The tricky part
> might be to come up with an ''unless'' parameter for it to
ensure that
> the master does not attempt to install the execution host twice.  This
> has the advantage that it does not rely on a shared file or indeed on
> NFS at all.  It does entail a delay between when the execution
host''s
> configuration is applied and when GE is actually installed, however.

I can live with that delay. The solution I proposed will probably have the same
delay - between the puppet run on the exec host and the puppet run on the
master.

> Your idea has merit too.  It is certainly possible to use Puppet on
> the execution hosts to ensure (or not) that some accessible file has a
> specific line.  There is no native resource for this narrow purpose
> (augeas notwithstanding), but you can find recipes on the PuppetLabs
> wiki.  If you have no other need for exported resources then it may be
> to your advantage to avoid them.

Yeah, I''m aware of "addifnosuchline" exec''s and the
like.

Thanks, Andreas