Re: [gentoo-amd64] Re: Please get me straight about sysvinit vs. systemd, udev vs eudev vs mdev, virtuals and other things...

[Mark Knecht <markknecht@gmail.com>]

On Mon, Mar 3, 2014 at 10:57 AM, Rich Freeman <rich0@gentoo.org> wrote:
> On Mon, Mar 3, 2014 at 1:38 PM, Mark Knecht <markknecht@gmail.com> wrote:
>> If I understand this all then systemd, in it's current state, is going
>> to require removing udev as a stand-along package, will remove
>> sysvinit as systemd provides /sbin/init, and will also replace OpenRC
>> with it's own code for starting and stopping services? It's a big
>> change but it's one of the reasons why I built the backup install on
>> the SSD. None of this really touches my spinning rust install I use
>> daily.
>
> I suggest you read the systemd docs.

I agree. Prior to Canek's previous email I wasn't giving this much
real though. With his response, your additional info and some study of
the docs I may try it later this week.

> Installing systemd will not
> remove sysvinit or openrc.  However, after you change your kernel
> command line they will not be run as pid1 or as a service manager, and
> systemd has its own configuration for services.  You can basically
> switch back and forth as long as you maintain your settings in
> parallel.
>

OK, that helps  with the worry that something goes wrong and the whole
system is left unbootable.

> There is work to make it possible to use systemd without having openrc
> installed.  The main issue right now is a few packages use functions
> in openrc which are not present in systemd, so that needs some
> refactoring.  However, having them both installed in parallel doesn't
> really cost anything besides a few inodes (and not all that many).
>
> Rich
>

Thanks,
Mark