Hi Ludo’,
On 2023-03-28 17:25, Ludovic Courtès wrote:
>
> Nope. :-) What is ‘my-heartbeat-job’ doing?
It queries shepherd to see if a service is running and sends a restart if
required.
It looks like this: (#$task is what will perform the actual checks)
--8<---------------cut here---------------start------------->8---
(define* (heartbeat-supervisor #:key (name #f) service task
#:allow-other-keys)
;; Query service status and restart if needed.
(program-file
(format #f "~@[~a-~]heartbeat-supervisor.scm" name)
(with-imported-modules (source-module-closure
'((gnu services herd)))
#~(begin
(use-modules (gnu services herd)
(srfi srfi-1))
(define (is-service-running? sym)
(lambda (x)
(and (live-service-running x)
(memq sym (live-service-provision x)))))
(let ((running? (not (null?
(any (is-service-running? '#$service)
(current-services))))))
(when running?
(case (status:exit-val (system* #$task))
((0) #t)
((125)
(format #t "Heartbeat worker error~%"))
(else
(format #t "Issuing restart for service '~a'~%" '#$service)
(restart-service '#$service)))))
(exit)))))
--8<---------------cut here---------------end--------------->8---
This message also shows up if you're using certbot-service-type,
so it's not specific to the snippet above.
Cheers,
Bruno
