I’ve really been getting into cfengine lately to manage configurations across multiple servers.

One thing I want to do is to make sure that the proper services are started. Making sure they’re running is easy with the processes command:

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processes:
        "cfenvd" restart "/sbin/service cfenvd restart"

I also want to make sure that cfenvd is in the startup scripts. My solution earlier was

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shellcommands:
  "/usr/bin/test -f /etc/rc3.d/S*cfenvd  || /sbin/chkconfig cfenvd on"

Which worked, but was run every time and generated unnecessary emails.

I tried some variants of

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classes:
  service_cfenvd_on = ( ReturnsZero("/sbin/chkconfig --list cfenvd | grep -q 3:on") )

but for some reason the pipe causes problems.

Reading through the chkconfig man page, I see that a simple “chkconfig cfenvd” will return 0 if the service is started in the current runlevel, and 1 otherwise. Thus:

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classes:
    service_cfenvd_on = ( ReturnsZero("/sbin/chkconfig --level 3 cfenvd") )
shellcommands:
    !service_cfenvd_on::
         "/sbin/chkconfig cfenvd on"