[Pkg-dns-devel] Bug#867192: Bug#867192: Bug#867192: let systemd know about the pid file

[Robert Edmonds]

Daniel Kahn Gillmor wrote:
> On Tue 2017-07-11 21:45:22 -0400, Simon Deziel wrote:
> > Having a PID file seems to be the easiest way to make both systemd and
> > SysV happy.
> 
> fwiw, i think that systemd would be happier without a pidfile.  using a
> pidfile introduces a failure mode (as we see here) that is entirely
> unnecessary in a system with proper process supervision.
> 
> The fact that systemd *can* do something about a pidfile doesn't mean
> that anyone should prefer it.  I really hope we can drop pidfiles where
> we don't need them.

Unfortunately, we have to continue supporting the sysvinit script (the
only plausible "compelling reason" to remove the sysvinit script per
#746715 I can think of would be the removal of sysvinit itself from the
archive), and the only way to configure Unbound's 'pidfile' parameter is
via the config.

So we either need to configure systemd to delete Unbound's pidfile, or
we could develop and contribute a patch upstream that allows overriding
the pidfile via the command-line. Then we could disable the pidfile by
default (for modern init systems), and enable the pidfile via the
command-line (for sysvinit) in the init script.

-- 
Robert Edmonds
edmonds at debian.org