Hi!
Commit c311089b0b19f094e44d3f858c29f77d757332d1 adds ‘mcron-service’.
If you want to give it a try, your feedback is welcome! Excerpt from
the manual below.
Ludo’.
7.2.7.2 Scheduled Job Execution
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The ‘(gnu services mcron)’ module provides an interface to GNU mcron, a
daemon to run jobs at scheduled times (*note (mcron)Top::). GNU mcron
is similar to the traditional Unix ‘cron’ daemon; the main difference is
that it is implemented in Guile Scheme, which provides a lot of
flexibility when specifying the scheduling of jobs and their actions.
For example, to define an operating system that runs the ‘updatedb’
(*note (find)Invoking updatedb::) and the ‘guix gc’ commands (*note
Invoking guix gc::) daily:
(use-modules (guix) (gnu) (gnu services mcron))
(define updatedb-job
;; Run 'updatedb' at 3 AM every day.
#~(job '(next-hour '(3))
"updatedb --prunepaths='/tmp /var/tmp /gnu/store'"))
(define garbage-collector-job
;; Collect garbage 5 minutes after midnight every day.
#~(job "5 0 * * *" ;Vixie cron syntax
"guix gc -F 1G"))
(operating-system
;; ...
(services (cons (mcron-service (list garbage-collector-job
updatedb-job))
%base-services)))
*Note mcron job specifications: (mcron)Guile Syntax, for more
information on mcron job specifications. Below is the reference of the
mcron service.
-- Scheme Procedure: mcron-service JOBS [#:mcron MCRON2]
Return an mcron service running MCRON that schedules JOBS, a list
of gexps denoting mcron job specifications.
This is a shorthand for:
(service mcron-service-type
(mcron-configuration (mcron mcron) (jobs jobs)))
-- Scheme Variable: mcron-service-type
This is the type of the ‘mcron’ service, whose value is an
‘mcron-configuration’ object.
This service type can be the target of a service extension that
provides it additional job specifications (*note Service
Composition::). In other words, it is possible to define services
that provide addition mcron jobs to run.
-- Data Type: mcron-configuration
Data type representing the configuration of mcron.
‘mcron’ (default: MCRON2)
The mcron package to use.
‘jobs’
This is a list of gexps (*note G-Expressions::), where each
gexp corresponds to an mcron job specification (*note mcron
job specifications: (mcron)Syntax.).
