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