On Wednesday, October 10, 2012 11:10:32 AM UTC-5, trevman wrote: > > I'm looking for a way to balance out services when insuring the content of > configuration files. > > Example is how to do this with /etc/yp.conf: > ## > domain example.com server 192.168.1.2 > domain example.com server 192.168.1.3 > domain example.com server 192.168.1.4 > ## > > I'd like to *change the order of the entries *in a random or rotating > fashion so that multiple machines would get a *different *order so that > we can scale the services without having to invest in a load balancer. > > Obviously, we wouldn't want the contents to continually change on every > machine, so the tests would need to be appropriate. > > Any ideas? > > There are lots of ways you could do this, but the the ready-built fqdn_rotate() function in Puppetlabs's add-in "stdlib" module (https://github.com/puppetlabs/puppetlabs-stdlib) would probably serve as a good foundation. Put the NIS server IPs in an array, shuffle it with fqdn_rand(), and read the results out into your yp.conf template. Each node will have a consistent order as long as its FQDN does not change.
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