Concerns about Puppet 4 master serving Puppet 3 clients

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Peter Berghold

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Jan 14, 2019, 10:22:24 AM1/14/19
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I am about to have our first Puppet 4 Puppet master into our production environment. We have a very large community of Puppet 3 "leaf nodes" being managed by our old Puppet 3 infrastructure. 

What issues might I run into with that and what should I do to mitigate this?

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Peter L. Berghold                       Salty....@gmail.com

http://science-fiction.berghold.net

Henrik Lindberg

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Jan 14, 2019, 11:01:21 AM1/14/19
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On 2019-01-14 16:22, Peter Berghold wrote:
> I am about to have our first Puppet 4 Puppet master into our production
> environment. We have a very large community of Puppet 3 "leaf nodes"
> being managed by our old Puppet 3 infrastructure.
>
> What issues might I run into with that and what should I do to mitigate
> this?
>

It is a quite open ended question unfortunately. You may want to start
reading here: https://puppet.com/docs/puppet/4.10/upgrade_major_pre.html
and then come back with more specific questions.

- henrik
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Visit my Blog "Puppet on the Edge"
http://puppet-on-the-edge.blogspot.se/

jcbollinger

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Jan 15, 2019, 8:52:35 AM1/15/19
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On Monday, January 14, 2019 at 10:01:21 AM UTC-6, Henrik Lindberg wrote:
On 2019-01-14 16:22, Peter Berghold wrote:
> I am about to have our first Puppet 4 Puppet master into our production
> environment. We have a very large community of Puppet 3 "leaf nodes"
> being managed by our old Puppet 3 infrastructure.
>
> What issues might I run into with that and what should I do to mitigate
> this?
>

It is a quite open ended question unfortunately. You may want to start
reading here: https://puppet.com/docs/puppet/4.10/upgrade_major_pre.html
and then come back with more specific questions. 


Hmmm.  I took the question to be about whether there were known issues revolving around a P4 master serving catalogs to P3 agents.  I didn't think P4 broke the pattern that the master supports agents from the previous generation.  Or is that less of a pattern than I thought?


John
 

Eric Sorenson

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Jan 16, 2019, 11:52:12 AM1/16/19
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You're correct John - Puppet 4 masters using Puppet Server will work with Puppet 3 agents.  If the catalog compiles (Henrik's point), the agent/master comms will be fine.

Note the same is not true for Apache/Passenger based Puppet 4 setups - the URL rewriting that enables the compatibility is only implemented in puppetserver.

--eric
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