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Sometimes it is pretty obvious when Puppet changes something in your
infrastructure and bad things happen in a big dramatic way. Other times
it’s not so obvious. It can be invaluable to be able to correlate
changes made by Puppet to other events happening in your infrastructure.
For example, in this diagram we have plotted the load average from a
group of servers. Blue vertical lines mark points in time when puppet
modified a resource on a host in the group. We can see that immediately
following a puppet change the load spiked on one of the servers.
Code available on github:
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