[thirdparty/dracut.git] / dracut.bootup.7.asc

DRACUT.BOOTUP(7)
================
:doctype: manpage
:man source:   dracut
:man manual:   dracut

NAME
----
dracut.bootup - boot ordering in the initramfs

DESCRIPTION
-----------

This flow chart illustrates the ordering of the services, if systemd is used in
the dracut initramfs.
----

                                    systemd-journal.socket
                                               |
                                               v
                                    dracut-cmdline.service
                                               |
                                               v
                                    dracut-pre-udev.service
                                               |
                                               v
                                     systemd-udevd.service
                                               |
                                               v
local-fs-pre.target                dracut-pre-trigger.service
         |                                     |
         v                                     v
 (various mounts)  (various swap  systemd-udev-trigger.service
         |           devices...)               |             (various low-level   (various low-level
         |               |                     |             services: seed,       API VFS mounts:
         v               v                     v             tmpfiles, random     mqueue, configfs,
  local-fs.target   swap.target     dracut-initqueue.service    sysctl, ...)        debugfs, ...)
         |               |                     |                    |                    |
         \_______________|____________________ | ___________________|____________________/
                                              \|/
                                               v
                                        sysinit.target
                                               |
                             _________________/|\___________________
                            /                  |                    \
                            |                  |                    |
                            v                  |                    v
                        (various               |              rescue.service
                       sockets...)             |                    |
                            |                  |                    v
                            v                  |              rescue.target
                     sockets.target            |
                            |                  |
                            \_________________ |                                 emergency.service
                                              \|                                         |
                                               v                                         v
                                         basic.target                             emergency.target
                                               |
                        ______________________/|
                       /                       |
                       |                       v
                       |            dracut-pre-mount.service
                       |                       |
                       |                       v
                       |                  sysroot.mount
                       |                       |
                       |                       v
                       |             initrd-root-fs.target
           (custom initrd services)            |
                       |                       v
                       |             dracut-mount.service
                       |                       |
                       |                       v
                       |            initrd-parse-etc.service
                       |                       |
                       |                       v
                       |            (sysroot-usr.mount and
                       |             various mounts marked
                       |               with fstab option
                       |                x-initrd.mount)
                       |                       |
                       |                       v
                       |                initrd-fs.target
                       \______________________ |
                                              \|
                                               v
                                          initrd.target
                                               |
                                               v
                                    dracut-pre-pivot.service
                                               |
                                               v
                                     initrd-cleanup.service
                                          isolates to
                                    initrd-switch-root.target
                                               |
                                               v
                        ______________________/|
                       /                       |
                       |        initrd-udevadm-cleanup-db.service
                       |                       |
           (custom initrd services)            |
                       |                       |
                       \______________________ |
                                              \|
                                               v
                                   initrd-switch-root.target
                                               |
                                               v
                                   initrd-switch-root.service
                                               |
                                               v
                                          switch-root
----


AUTHOR
------
Harald Hoyer

SEE ALSO
--------
*dracut*(8) *bootup*(7)
Commit	Line	Data
a1ebd771 HH	1	DRACUT.BOOTUP(7)
	2	================
	3	:doctype: manpage
	4	:man source: dracut
	5	:man manual: dracut
	6
	7	NAME
	8	----
	9	dracut.bootup - boot ordering in the initramfs
	10
	11	DESCRIPTION
	12	-----------
	13
ef9ddb91 HH	14	This flow chart illustrates the ordering of the services, if systemd is used in
ef9ddb91 HH	15	the dracut initramfs.
a1ebd771 HH	16	----
	17
	18	systemd-journal.socket
	19	\|
	20	v
	21	dracut-cmdline.service
	22	\|
	23	v
	24	dracut-pre-udev.service
	25	\|
	26	v
	27	systemd-udevd.service
	28	\|
	29	v
	30	local-fs-pre.target dracut-pre-trigger.service
	31	\| \|
	32	v v
	33	(various mounts) (various swap systemd-udev-trigger.service
	34	\| devices...) \| (various low-level (various low-level
	35	\| \| \| services: seed, API VFS mounts:
	36	v v v tmpfiles, random mqueue, configfs,
	37	local-fs.target swap.target dracut-initqueue.service sysctl, ...) debugfs, ...)
	38	\| \| \| \| \|
	39	\_______________\|____________________ \| ___________________\|____________________/
	40	\\|/
	41	v
	42	sysinit.target
	43	\|
	44	_________________/\|\___________________
	45	/ \| \
	46	\| \| \|
	47	v \| v
	48	(various \| rescue.service
	49	sockets...) \| \|
	50	\| \| v
	51	v \| rescue.target
	52	sockets.target \|
	53	\| \|
	54	\_________________ \| emergency.service
	55	\\| \|
	56	v v
	57	basic.target emergency.target
	58	\|
	59	______________________/\|
	60	/ \|
	61	\| v
	62	\| dracut-pre-mount.service
	63	\| \|
	64	\| v
	65	\| sysroot.mount
	66	\| \|
	67	\| v
	68	\| initrd-root-fs.target
	69	(custom initrd services) \|
	70	\| v
	71	\| dracut-mount.service
	72	\| \|
	73	\| v
	74	\| initrd-parse-etc.service
	75	\| \|
	76	\| v
	77	\| (sysroot-usr.mount and
	78	\| various mounts marked
	79	\| with fstab option
80	\| x-initrd.mount)
81	\| \|
82	\| v
83	\| initrd-fs.target
84	\______________________ \|
85	\\|
86	v
87	initrd.target
88	\|
89	v
90	dracut-pre-pivot.service
91	\|
92	v
93	initrd-cleanup.service
94	isolates to
95	initrd-switch-root.target
96	\|
97	v
98	______________________/\|
99	/ \|
100	\| initrd-udevadm-cleanup-db.service
101	\| \|
102	(custom initrd services) \|
103	\| \|
104	\______________________ \|
105	\\|
106	v
107	initrd-switch-root.target
108	\|
109	v
110	initrd-switch-root.service
111	\|
112	v
113	switch-root
114	----
115
116
117	AUTHOR
118	------
119	Harald Hoyer
120
121	SEE ALSO
122	--------
123	dracut(8) bootup(7)