On Tue, 2012-06-19 at 03:23 -0700, Duncan wrote: > Hi folks, I'm scratching my head with a problem with system load. > > When Puppet checks in every hour, runs through all our checks, then > exits having confirmed that everything is indeed as expected, the vast > majority of the time no changes are made. But we still load our > systems with this work every hour just to make sure. Our current > configuration isn't perhaps the most streamlined, taking 5 minutes for > a run. > > The nature of our system, however, is highly virtualised with hundreds > of servers running on a handful of physical hosts. It got me thinking > about how to reduce the system load of Puppet runs as much as > possible. Especially when there may be a move to outsource to > virtualisation hosts who charge per CPU usage (but that's a business > decision, not mine). > > Is there a prescribed method for reducing Puppet runs to only be done > when necessary? Running an md5sum comparison on a file every hour > isn't much CPU work, but can it be configured so that Puppet runs are > triggered by file changes? I know inotify can help me here, but I was > wondering if there's anything already built-in?
It depends on what you really want to achieve. Part of the CPU consumption is to make sure the configuration on the node is correct. I see a possibility where: * you don't care if there is some configuration drift on the agent (ie manual modifications for instance) * you run the agent on demand when you need a change This can be done with something like MCollective where you can decide to remotely launch some puppet runs as you see fit. Now you need to have a way to map from manifest modification to a set of hosts where you need a puppet run (which might not be that trivial). -- Brice Figureau Follow the latest Puppet Community evolutions on www.planetpuppet.org! -- You received this message because you are subscribed to the Google Groups "Puppet Users" group. To post to this group, send email to puppet-users@googlegroups.com. To unsubscribe from this group, send email to puppet-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/puppet-users?hl=en.
