dracut.bootup(7) centos man page | unix.com

DRACUT.BOOTUP(7)						      dracut							  DRACUT.BOOTUP(7)

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)

dracut								    06/12/2014							  DRACUT.BOOTUP(7)