the bottom of the chart.</para>
<programlisting>local-fs-pre.target
- |
- v
+ |
+ v
(various mounts and (various swap (various cryptsetup
- fsck services...) devices...) devices...) (various low-level (various low-level
- | | | services: udevd, API VFS mounts:
- v v v tmpfiles, random mqueue, configfs,
+ fsck services...) devices...) devices...) (various low-level (various low-level
+ | | | services: udevd, API VFS mounts:
+ v v v tmpfiles, random mqueue, configfs,
local-fs.target swap.target cryptsetup.target seed, sysctl, ...) debugfs, ...)
- | | | | |
- \__________________|_________________ | ___________________|____________________/
- \|/
- v
- sysinit.target
- |
- ____________________________________/|\________________________________________
- / | | | \
- | | | | |
- v v | v v
- (various (various | (various rescue.service
- timers...) paths...) | sockets...) |
- | | | | v
- v v | v <emphasis>rescue.target</emphasis>
- timers.target paths.target | sockets.target
- | | | |
- v |_________________ | ___________________/
- \|/
- v
- basic.target
- |
- ____________________________________/| emergency.service
- / | | |
- | | | v
- v v v <emphasis>emergency.target</emphasis>
- display- (various system (various system
- manager.service services services)
- | required for |
- | graphical UIs) v
- | | <emphasis>multi-user.target</emphasis>
- | | |
- \_________________ | _________________/
- \|/
- v
- <emphasis>graphical.target</emphasis></programlisting>
+ | | | | |
+ \__________________|_________________ | ___________________|____________________/
+ \|/
+ v
+ sysinit.target
+ |
+ ____________________________________/|\________________________________________
+ / | | | \
+ | | | | |
+ v v | v v
+ (various (various | (various rescue.service
+ timers...) paths...) | sockets...) |
+ | | | | v
+ v v | v <emphasis>rescue.target</emphasis>
+ timers.target paths.target | sockets.target
+ | | | |
+ v |_________________ | ___________________/
+ \|/
+ v
+ basic.target
+ |
+ ____________________________________/| emergency.service
+ / | | |
+ | | | v
+ v v v <emphasis>emergency.target</emphasis>
+ display- (various system (various system
+ manager.service services services)
+ | required for |
+ | graphical UIs) v
+ | | <emphasis>multi-user.target</emphasis>
+ | | |
+ \_________________ | _________________/
+ \|/
+ v
+ <emphasis>graphical.target</emphasis></programlisting>
<para>Target units that are commonly used as boot targets are
<emphasis>emphasized</emphasis>. These units are good choices as
goal targets, for example by passing them to the
<varname>systemd.unit=</varname> kernel command line option (see
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>)
- or by symlinking <filename>default.target</filename> to
- them.</para>
+ or by symlinking <filename>default.target</filename> to them.
+ </para>
<para><filename>timers.target</filename> is pulled-in by
<filename>basic.target</filename> asynchronously. This allows
<filename>/sysroot</filename>.
</para>
-<programlisting> : (beginning identical to above)
- :
- v
- basic.target
- | emergency.service
- ______________________/| |
- / | v
- | sysroot.mount <emphasis>emergency.target</emphasis>
- | |
- | v
- | initrd-root-fs.target
- | |
- | v
- v initrd-parse-etc.service
- (custom initrd |
- services...) v
- | (sysroot-usr.mount and
- | various mounts marked
- | with fstab option
- | x-initrd.mount...)
- | |
- | v
- | initrd-fs.target
- \______________________ |
- \|
- v
- initrd.target
- |
- v
- initrd-cleanup.service
- isolates to
- initrd-switch-root.target
- |
- v
- ______________________/|
- / v
- | initrd-udevadm-cleanup-db.service
- v |
- (custom initrd |
- services...) |
- \______________________ |
- \|
- v
- initrd-switch-root.target
- |
- v
- initrd-switch-root.service
- |
- v
- Transition to Host OS</programlisting>
+<programlisting> : (beginning identical to above)
+ :
+ v
+ basic.target
+ | emergency.service
+ ______________________/| |
+ / | v
+ | sysroot.mount <emphasis>emergency.target</emphasis>
+ | |
+ | v
+ | initrd-root-fs.target
+ | |
+ | v
+ v initrd-parse-etc.service
+ (custom initrd |
+ services...) v
+ | (sysroot-usr.mount and
+ | various mounts marked
+ | with fstab option
+ | x-initrd.mount...)
+ | |
+ | v
+ | initrd-fs.target
+ \______________________ |
+ \|
+ v
+ initrd.target
+ |
+ v
+ initrd-cleanup.service
+ isolates to
+ initrd-switch-root.target
+ |
+ v
+ ______________________/|
+ / v
+ | initrd-udevadm-cleanup-db.service
+ v |
+ (custom initrd |
+ services...) |
+ \______________________ |
+ \|
+ v
+ initrd-switch-root.target
+ |
+ v
+ initrd-switch-root.service
+ |
+ v
+ Transition to Host OS</programlisting>
</refsect1>
-
<refsect1>
<title>System Manager Shutdown</title>
<para>System shutdown with systemd also consists of various target
units with some minimal ordering structure applied:</para>
-<programlisting> (conflicts with (conflicts with
- all system all file system
- services) mounts, swaps,
- | cryptsetup
- | devices, ...)
- | |
- v v
- shutdown.target umount.target
- | |
- \_______ ______/
- \ /
- v
- (various low-level
- services)
- |
- v
- final.target
- |
- _____________________________________/ \_________________________________
- / | | \
- | | | |
- v v v v
+<programlisting> (conflicts with (conflicts with
+ all system all file system
+ services) mounts, swaps,
+ | cryptsetup
+ | devices, ...)
+ | |
+ v v
+ shutdown.target umount.target
+ | |
+ \_______ ______/
+ \ /
+ v
+ (various low-level
+ services)
+ |
+ v
+ final.target
+ |
+ _____________________________________/ \_________________________________
+ / | | \
+ | | | |
+ v v v v
systemd-reboot.service systemd-poweroff.service systemd-halt.service systemd-kexec.service
- | | | |
- v v v v
- <emphasis>reboot.target</emphasis> <emphasis>poweroff.target</emphasis> <emphasis>halt.target</emphasis> <emphasis>kexec.target</emphasis></programlisting>
+ | | | |
+ v v v v
+ <emphasis>reboot.target</emphasis> <emphasis>poweroff.target</emphasis> <emphasis>halt.target</emphasis> <emphasis>kexec.target</emphasis></programlisting>
<para>Commonly used system shutdown targets are
<emphasis>emphasized</emphasis>.</para>
~ianmdlvl / elogind.git / commitdiff