Bernardo Reino via Postfix-users:
> >> I cannot imagine why/when the cerbot client would fail to run the
> >> post-hooks (in a sane environment).
> >
> > Systems crash. What are the reliability guarantees from the certbot
> > client: will it run once, or will it somehow maintain state and
> > recover when a run was interrupted by a system crash?
>
> In such cases, and/or just "on top" of the certbot renewal hooks,
> one could have a cron job doing "postmap" and/or "postfix reload"
> or whatever, as Viktor wrote. (but again, then your cron job must
> make sure that certbot is not (con)currently running).
In other words, reliable execution requires a cron job, idempotent
actions, and a locking mechanism.
Wietse
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