I'm trying to get a cron entry to exist based on the contents of a file.
I tried this:
exec { "check-cron":
command => "/bin/echo",
logoutput => true,
onlyif => "/bin/grep 'crontab' /etc/crontab.txt"
}
cron { exec-date:
require => Exec["check-cron"],
ensure => "present",
command => "date >> /tmp/date.log",
user => "root",
minute => "*/10"
}
My grep returns a value of 2 because /etc/crontab.txt does not exist:
# /bin/grep 'crontab' /etc/crontab.txt
grep: /etc/crontab.txt: No such file or directory
# echo $?
2
and yet puppet wants to install the crontab:
# /usr/sbin/puppetd --test --noop
info: Caching catalog at /var/lib/puppet/localconfig.yaml
notice: Starting catalog run
notice: //Cron[exec-date]/ensure: is absent, should be present (noop)
notice: Finished catalog run in 4.22 seconds
Once I put the text in /etc/crontab.txt, the logic gets reversed:
# echo crontab >> /etc/crontab.txt
# /usr/sbin/puppetd --test --noop
info: Caching catalog at /var/lib/puppet/localconfig.yaml
notice: Starting catalog run
notice: //Exec[check-cron]/returns: is notrun, should be 0 (noop)
notice: //Cron[exec-date]/ensure: is absent, should be present (noop)
notice: Finished catalog run in 4.27 seconds
According to the documentation on onlyif:
If this parameter is set, then this exec will only run if the command
returns 0.
I'm stumped. And I may not be approaching this in the right way. Any
pointers would be appreciated. Also, the logic here (if I had it working)
would not permit *removal* of the cron job if it exists. I could put two
logically opposite entries in there to do that, but now it just seems pretty
ugly, so I suspect I'm missing the elegant solution.
Pete
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