Re: libinit idea

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1



On 02/23/2014 02:09 PM, Nikolai Lifanov wrote:
> On 2014-02-23 13:47, David Chisnall wrote:
>> On 23 Feb 2014, at 18:31, Freddie Cash <fjwcash_at_gmail.com>
>> wrote:
>> 
>>> The main developer for systemd is very anti-portability and 
>>> anti-!Linux. He had actively rejected patches that made his
>>> projects work on non-Linux systems. In order to port systemd to
>>> a non-Linux system, he wants you to first implement every Linux
>>> feature that systemd uses.
>>> 
>>> systemd is a non-starter, and not with considering.
>> 
>> I don't think that's a relevant discussion.  The license would
>> likely preclude systemd from making it into the base system
>> anyway.  Please let's not be too negative about the author of
>> systemd: he's responsible for more people switching from Linux to
>> FreeBSD than any other single individual I can think of and I
>> would strongly encourage him to continue.
>> 
> 
> I also noticed this.
> 
>> The relevant question is whether it does anything in a way that
>> is sufficiently sensible to merit a FreeBSD service management 
>> infrastructure doing it in the same (or a similar) way.
>> 
>> Oh, two things missing from my original list:
>> 
>> - Service jails should be able to run without an init process,
>> with just the required libraries installed and the host machine's
>> init system starting the jail and the service process(es) inside
>> it.
>> 
> 
> Isn't this a bit too complicated? If there is an init script under 
> $jail/usr/local/etc/rc.d, then the host init will need to find it,
> which can be even more complicated if rc search path in the jail is
> customized (prefixed if it's managed by a different department, for
> example). Host init will have to read the jail configuration, parse
> it too, and then manage children and pids of the jailed services,
> including reparenting, all within a jail context. Then the admin in
> that jail would need to be able to restart services, affecting host
> init, which opens a whole new can of worms. If init program is
> skinny and not too complicated, which it is, there is no tangible
> overhead. And if a jail really needs a single simple service, init
> process in the jail can *be* that, like jexec myjail /bin/sh -c
> somestuff (or even /usr/local/bin/myservice -c myservice conf).
> 
>> - The init system should use process descriptors, not pids, for 
>> tracking processes, preventing issues with pid reuse and so on
>> (and removing the need to write pid files).  If process
>> descriptors do not provide the required functionality (e.g. the
>> ability to trace forked children) then this should be added.
>> 
> 
> This is a good idea.
> 
>> David

openrc already does this and runs on FreeBSD, ive been using it on 5
boxes in testing so far, clealy replaces init without breaking rc.conf
configurations.

>> 
>> _______________________________________________ 
>> freebsd-current_at_freebsd.org mailing list 
>> http://lists.freebsd.org/mailman/listinfo/freebsd-current To
>> unsubscribe, send any mail to 
>> "freebsd-current-unsubscribe_at_freebsd.org"
> _______________________________________________ 
> freebsd-current_at_freebsd.org mailing list 
> http://lists.freebsd.org/mailman/listinfo/freebsd-current To
> unsubscribe, send any mail to
> "freebsd-current-unsubscribe_at_freebsd.org"
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1

iQEcBAEBAgAGBQJTCkyWAAoJEP7cFACJNhNalmgH/1hquNUT75g4xOGc8CX+RyVD
kVYKW2SUgMOCCQwgXMydsZUafQ8kLSU24H8T9W2J/q2WDm1lWedqeO9/yk7t3pNS
8+c8YsTIuAYtPgiBES65YW667Cj9+FwN268fEqF58/WNS6kNx8snCfoRkvy6l7jN
M62ajdNJtgSxF/Iwyfuq4W6REBW3CF4rL+g64OGrK8PQ6yPteJfM3CUGQoUlHXZC
KHHY+qMYBSb/H0j9z7PzcpJsC/bb4fJRzccfVc34IV0ovdevLtQeJojTy4E55NhB
kWTX1EDRYVxv9Zvy1uPut5qAtc0b+UB5sAPON0RGxBB0rzjzIYZXlieKo4s752w=
=BXYO
-----END PGP SIGNATURE-----