I have played with cfengine for a while and set up an environment with about 20 client machines.One day /var/cfengine/inputs was empty on one of these machines. I don't know why and it was easy to fix, but I wasn't warned about it - I came across it by accident. So, how many of my cfengine-activated clients do really run cfengine? I ended up visiting all of them and found a few more with problems - such a brute force method doesn't scale well.
How do you monitor this? Maybe activate a policy from time to time to send an email to you? Analyse the log files to verify that all clients check in every hour (my clients are on an hourly cf-execd)? Use other tools such as ganglia/nagios/icinga? Any best practice here? - Erlend Leganger
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