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What is the meaning behind stdlib::stages?

asked 2013-01-30 17:37:45 -0600

There are run stages defined in the puppetlabs-stdlib module. I was wondering if there were any examples of what types of modules or applications might go in each stage? Right now I put yumrepo configuration, installation of LSB packages, and Puppet configuration in the setup stage and have everything else run in main. What sort of things (like tomcat deployment in setup_app and then WARfile deployment in deploy_app) have you done with the stdlib run stages?

The high level stages are (in order):

 * setup
 * main
 * runtime
 * setup_infra
 * deploy_infra
 * setup_app
 * deploy_app
 * deploy
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answered 2013-01-30 21:23:46 -0600

nanliu gravatar image

updated 2013-01-30 21:26:12 -0600

TLDR, the benefits of stages are limited and there are few appropriate usages. Maybe 'setup' stage for repos, but I would not touch any of the other stages.

The problem with using stages is it dramatically complicates dependency. If class tomcat is in stage main (the default), I can easily specify Class['tomcat'] <- Class['myapp'], However if class tomcat is in 'setup_app' stage, that dependency will fail, because class myapp defaults in stage main which comes before 'setup_app' stage. I'm not aware of any Puppet Labs module that uses stdlib::stages.

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Could stages be used to upgrade the puppet client on the node, before a full run is started?

Martijn Heemels gravatar imageMartijn Heemels ( 2013-03-10 19:21:22 -0600 )edit
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You'll run into issues since puppet will term itself. I would suggest upgrades done cleanly in a separate environment. See https://github.com/adrienthebo/puppet-pe_upgrade

nanliu gravatar imagenanliu ( 2013-04-05 15:28:53 -0600 )edit

Thanks nanliu. That sounds doable, and is actually a reasonably clean solution.

Martijn Heemels gravatar imageMartijn Heemels ( 2013-04-13 15:53:28 -0600 )edit

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Asked: 2013-01-30 17:37:45 -0600

Seen: 500 times

Last updated: Jan 30 '13