dracut.bootup.7.asc

   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)