On Wed, Jul 21, 2010 at 03:13:12PM +0200, Lennart Poettering wrote: > On Tue, 20.07.10 20:24, Toshio Kuratomi (a.badger@xxxxxxxxx) wrote: > > > On Wed, Jul 14, 2010 at 2:50 PM, Adam Williamson <awilliam@xxxxxxxxxx> wrote: > > > On Wed, 2010-07-14 at 15:42 -0600, Kevin Fenzi wrote: > > > > > >> Perhaps someone could put together a wiki page for lazy sysadmins with > > >> a Q&A? ie, I used to do this in upstart/sysvinit, how do I do it with > > >> systemd? > > > > > > Jóhann Guðmundsson (viking_ice) has been working on something along > > > these lines: > > > > > > http://fedoraproject.org/wiki/User:Johannbg/QA/Systemd > > > > > > it was mentioned in the QA meeting a few weeks back. > > > > I have a few requests for things to add to that page :-) > > > > * What replaces chkconfig > > * What replaces /etc/init.d/SERVICENAME start | stop ? > > > > Similarly, for packaging guidelines updates, how do we install > > packages that provide services and have them not start up? > > The longer answers for most of these questions you find in Jóhann's > reply. But a few additional notes: > > - If you only install a SysV init script, then continue to use chkconfig > as usual. It works as intended to enable/disable SysV init > scripts. Only if you use native systemd unit files you should use > systemd-install instead. Note that most operations systemd-install > executes are very easy however, as all it does is creating/removing a > few suggested symlinks which are listed in a [Install] section in > the unit file. It is OK and even expected to manually create > additional symlinks, or remove symlinks, as the administrator likes. > > - Regardless whether systemd or SysV init scripts/unit files are used, > "systemctl start" and "systemctl stop" are the recommended > replacements for "service foo start" and "service foo stop". Howver, > as soon as https://bugzilla.redhat.com/show_bug.cgi?id=612728 is fixed > you can use the old syntax for SysV scripts too in which case the > right thing happens, but you'll get a blurb printed that suggests you > to use "systemctl" instead, the next time. > > - If you want to enable and possibly start a service from the %post of > an RPM then use the "systemd-install enable" command, which will > create a few symlinks as listed in the [Install] section of the unit > file. On top of that you may also pass --realize=... to the command, > which allows you to not only enable the unit for the next boot, but > also have the changes take effect immediately: i.e. --realize=reload > is the very least you should use, which simply makes systemd aware of > the changed symlinks. Then, at time of %preun you should use > --realize=yes which makes sure the daemon is stopped in > deinstallation. For a few daemons it makes sense to restart them if > they are running already during upgrade. Use --realize=minimal for > those. For even others (usually very low-level ones) it might even > make sense to start them right-away after installation, even if they > were not running before. For those use --realize=maybe. But which > option you use really depends on the package. Most packages > should probably stick to --realize=yes on %preun and --realize=reload > in %post. Suggested .spec file fragments you find in the daemon(7) man > page. > Normally, we don't want a service to be started just because the package has been installed: https://fedoraproject.org/wiki/Packaging/SysVInitScript. This is the current recommended scriptlets: %post # This adds the proper /etc/rc*.d links for the script /sbin/chkconfig --add <script> %preun if [ $1 = 0 ] ; then /sbin/service <script> stop >/dev/null 2>&1 /sbin/chkconfig --del <script> fi %postun if [ "$1" -ge "1" ] ; then /sbin/service <script> condrestart >/dev/null 2>&1 || : fi I think I've got the %preun translated correctly but I'm not sure about either the %post or %postun:: %post # Don't need a %post as systemd automatically knows about the defaults? %preun if [ $1 = 0 ] ; then /usr/bin/systemd-install disable %{unit name}.service --realize=disable > /dev/null 2>&1 || : fi %postun if [ "$1" -ge "1" ] ; then # Can't figure out how to do a conditional restart here. Help? fi -Toshio
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