Forum: CFEngine Help
Subject: Re: inserting lines into crontab
Author: davidlee
Link to topic: https://cfengine.com/forum/read.php?3,23442,23466#msg-23466

Neil:  Thanks for your second reply.  What my team members would like is the 
capability simply to maintain a centralised repository of crontab-like snippet 
files.  This has great merit from the simplicity standpoint.  These will get 
installed onto a variety of different machines with different functions, so 
those snippets will somehow need integrating into each system's own cron 
functions.  And I have to say that I very much sympathise with this viewpoint.

I believe in cfengine! So I would fully envision using each machine's cfengine 
to import (perhaps selectively) those snippet files and insert them into that 
machines own cron functionality.  But what we are trying to avoid is having to 
write the cron entries deep in the murky depths of cfengine syntax, when a file 
repository sitting alongside those cfengine files will be just as clean, and a 
lot more comprehensible.  (Contrast the visual shock of, for example, Ryan's 
method with the elegance of a one-line file snippet (three lines if you include 
possible start and end markers. ) 

I believe in cfengine!  But that's not the same as thinking "because I have 
this great hammer, therefore I have to coerce every single detail of every 
single problem to look like a nail".  Rather I'm thinking "because I have this 
great Swiss-army penknife, I should use the right tools in the right places".  
And for us, that would the simplicity of writing crontab-like file snippets as 
files (unencumbered by the complexity and therefore error-dangers of writing 
cfengine scripts for each line of each crontab), and asking cfengine to promise 
to maintain those into the target systems.

Mike's earlier suggestion of "/etc/cron.d" looks very good.  I've just written 
and tested the cfengine scripting to do this.  It installs such snippets and 
maintains changes to them.  All under the control of cfengine.

Ryan: Thanks for the idea.  As discussed above, my team members (including me!) 
reckon it is much cleaner (the KISS principle) to maintain file snippets if 
reasonably possible.  And i think the method I have outlined is fully 
conformant with cfengine principles, isn't it?

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