On 14-09-11 12:29, [email protected] wrote:
> 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?
>
we use the /etc/cron.d setup and use this bundle maybe you find it useful
###
# Install a cronjob in a Vixie cron environment
#
bundle agent sara_cronjob(name,command,user,mins,hours,day_of_month,
month,day_of_week)
{
vars:
any::
"vixie_cron_dir" string => "/etc/cron.d";
classes:
"VIXIE_CRON" expression => isdir("$(vixie_cron_dir)");
files:
VIXIE_CRON::
"$(vixie_cron_dir)/$(name)"
comment => "Vixie cron: one command per file",
create => "true",
edit_defaults => empty,
edit_line => append_if_no_line("$(mins) $(hours)
$(day_of_month) $(month) $(day_of_week) $(user) $(command)"),
perms => mo("644","root"),
classes => if_repaired( cron_job_added );
reports:
!VIXIE_CRON::
"No Vixie cron software installed";
cron_job_added::
"$(name) is installed in $(vixie_cron_dir)";
}
Usage:
"any" usebundle =>
sara_cronjob("cfexecd","/etc/cfengine3/check_cfexecd.sh","root","*/4","*","*","*","*");
--
********************************************************************
* Bas van der Vlies e-mail: [email protected] *
* SARA - Academic Computing Services Amsterdam, The Netherlands *
********************************************************************
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