[systemd-devel] PgSQL, MySQL systemd services - how to rewrite complex init scripts?

[Tom Lane]

Gustavo Sverzut Barbieri <barbieri at profusion.mobi> writes:
> 2011/4/9 Michał Piotrowski <mkkp4x4 at gmail.com>:
>> Postgresql script has perform_initdb(), initdb() and upgrade()
>> functions. ...
>> Mysql script also has some data dir creation code - I think it can
>> also be moved to separated script.

> As mentioned with handful similar cases: this should be handled as
> part of the daemon itself, not initscript.  That's the final solution
> we should aim as it's the only sane place to do it.

[ shrug... ]  Users of these databases are accustomed to having that
functionality provided in that way.  Not only does this mean fewer
scripts to package, it guarantees that the initialization actions have
the same ideas as the daemon start/stop actions about configuration
details (eg, where the database files are located).  The daemon can
*not* source that knowledge internally, at least not without destroying
its configurability, so what you say above is a non-solution.

If you take an absolutist position that systemd scripts cannot be used
for such purposes, that will either result in kluged-up solutions or
non-adoption of systemd.  You'd be better off in the long run to realize
that there is a reason for the traditional initscript infrastructure to
provide extra "custom" actions for particular services, and to offer an
equivalent capability.

Just sayin.

			regards, tom lane