Puppet users - Apr 2013 - Need some suggestions about how to handle dependencies between different Puppet nodes

I''m trying to use puppet to automate IBM Domino installation. The first
demo that I want to make is including two servers. 

   - One will be the primary Domino Server. 
   - The other will be the additional server. 

Now the problem I met is when I have to define an sequence there because 
Domino additional server requires a server id that must be generated by the 
1st node. In other way, the 2nd node have to wait the 1st node finished, 
then it can be installed and configured. 

I tried to Google this similar issue. I found MCollective could be the 
answer but I can not find a example. Is there anyone knows how to handle 
dependencies between different Puppet nodes.

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Someone else was asking something similar a while ago.

The only solution I can remember is to export a file from the 1st node with
the server id in it and require that on the second node.

I would be using the ripienaar-concat module on puppet forge to manage the
config file and export the server id stanza from the first node.
You would need to put a require on the second node or some other check to
make sure it exists before building the second node.
You could also run a query against puppetdb and require that on the second
node.

Does that make sense?




On 19 April 2013 11:52, <pholas@gmail.com> wrote:
>
> I''m trying to use puppet to automate IBM Domino installation. The
first
> demo that I want to make is including two servers.
>
>    - One will be the primary Domino Server.
>    - The other will be the additional server.
>
> Now the problem I met is when I have to define an sequence there because
> Domino additional server requires a server id that must be generated by the
> 1st node. In other way, the 2nd node have to wait the 1st node finished,
> then it can be installed and configured.
>
> I tried to Google this similar issue. I found MCollective could be the
> answer but I can not find a example. Is there anyone knows how to handle
> dependencies between different Puppet nodes.
>
> --
> You received this message because you are subscribed to the Google Groups
> "Puppet Users" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to puppet-users+unsubscribe@googlegroups.com.
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>
>
>
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On Thursday, April 18, 2013 8:52:59 PM UTC-5, pho...@gmail.com
wrote:
>
>
> I''m trying to use puppet to automate IBM Domino installation. The
first
> demo that I want to make is including two servers. 
>
>    - One will be the primary Domino Server. 
>    - The other will be the additional server. 
>
> Now the problem I met is when I have to define an sequence there because 
> Domino additional server requires a server id that must be generated by the
> 1st node. In other way, the 2nd node have to wait the 1st node finished, 
> then it can be installed and configured. 
>
> I tried to Google this similar issue. I found MCollective could be the 
> answer but I can not find a example. Is there anyone knows how to handle 
> dependencies between different Puppet nodes.
>
Dependencies are one thing, but what you''re asking about is
orchestration
-- you want to control the relative timing and sequence of Puppet runs on 
different nodes.  Puppet does not currently provide for that.  MCollective 
could do, but I cannot speak to details there.

A question to ask yourself, however, is whether this is a problem you 
actually need to solve.  If you can tolerate the additional server being 
misconfigured for a short time -- at least with respect to Domino -- then 
you don''t really need to ensure that the primary is configured first.  
Instead, you can simply rely on the additional server to be configured 
correctly for the primary on the first Puppet run after the primary is 
configured.  By playing with the Puppet run interval, you can make that 
delay more or less as small as you like.


John

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