Difference between revisions of "Initramfs zfs boot"
From copec
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* The linux kernel is initially bootstrapped. | * The linux kernel is initially bootstrapped. | ||
* The compiled-in initramfs is mounted and executed. | * The compiled-in initramfs is mounted and executed. | ||
| − | * * It mounts the external initramfs; Deletes everything under its own initramfs; Executes the external initramfs /init | + | ** It mounts the external initramfs; Deletes everything under its own initramfs; Executes the external initramfs /init |
| + | |||
| + | ==== (External) initramfs init ==== | ||
| + | * Create | ||
| + | ** /dev | ||
| + | ** /root | ||
| + | ** /sys | ||
| + | ** /proc | ||
| + | ** /tmp | ||
| + | ** /var/lock | ||
| + | * Mount | ||
| + | ** /sys | ||
| + | ** /proc | ||
| + | ** /dev | ||
| + | ** /dev/pts | ||
| + | ** /run | ||
| + | * Create | ||
| + | ** /run/initramfs | ||
| + | * Setup bash exports | ||
| + | * Setup hostname | ||
| + | * Source | ||
| + | ** /conf/initramfs.conf | ||
| + | ** /conf/conf.d/* | ||
| + | ** /scripts/functions | ||
| + | |||
| + | * Parse command line options | ||
| + | ** init root rootflags rootfstype rootdelay resumedelay loop loopflags loopfstype crytopts nfsroot netboot ip ip6 boot ubi.mtd resume resume_offset noresume drop_capabilities panic quiet ro rw debug break blacklist netconsole BOOTIF hwaddr fastboot forcefsck fsckfix fsckmode fsck.repair recovery | ||
| + | |||
| + | * Default | ||
| + | ** BOOT=local | ||
| + | ** noresume | ||
| + | |||
| + | * maybe_break top | ||
| + | ** export BOOT | ||
| + | ** run_scripts /scripts/init-top | ||
| + | * maybe_break modules | ||
| + | ** load_modules | ||
| + | * maybe_break premount | ||
| + | ** run_scripts /scripts/init-premount | ||
| + | * maybe_break mount | ||
| + | * /scripts/local | ||
| + | * /scripts/nfs | ||
| + | * /scripts/BOOT | ||
| + | * parse_numeric ROOT | ||
| + | * maybe_break mountroot | ||
| + | * mount_top | ||
| + | * mount_premount | ||
| + | * mountroot | ||
| + | |||
| + | * Mount | ||
| + | ** /usr | ||
| + | |||
| + | * mount_bottom | ||
| + | * nfs_bottom | ||
| + | * local_bottom | ||
| + | * maybe_break bottom | ||
| + | ** run_scripts /scripts/init-bottom | ||
Latest revision as of 12:40, 24 January 2017
Overview
Both Debian and Ubuntu fail to boot when there is an arbitrarily more complex zpool than a single vdev that contains the bootfs.
Notes on Boot Process
- The linux kernel is initially bootstrapped.
- The compiled-in initramfs is mounted and executed.
- It mounts the external initramfs; Deletes everything under its own initramfs; Executes the external initramfs /init
(External) initramfs init
- Create
- /dev
- /root
- /sys
- /proc
- /tmp
- /var/lock
- Mount
- /sys
- /proc
- /dev
- /dev/pts
- /run
- Create
- /run/initramfs
- Setup bash exports
- Setup hostname
- Source
- /conf/initramfs.conf
- /conf/conf.d/*
- /scripts/functions
- Parse command line options
- init root rootflags rootfstype rootdelay resumedelay loop loopflags loopfstype crytopts nfsroot netboot ip ip6 boot ubi.mtd resume resume_offset noresume drop_capabilities panic quiet ro rw debug break blacklist netconsole BOOTIF hwaddr fastboot forcefsck fsckfix fsckmode fsck.repair recovery
- Default
- BOOT=local
- noresume
- maybe_break top
- export BOOT
- run_scripts /scripts/init-top
- maybe_break modules
- load_modules
- maybe_break premount
- run_scripts /scripts/init-premount
- maybe_break mount
- /scripts/local
- /scripts/nfs
- /scripts/BOOT
- parse_numeric ROOT
- maybe_break mountroot
- mount_top
- mount_premount
- mountroot
- Mount
- /usr
- mount_bottom
- nfs_bottom
- local_bottom
- maybe_break bottom
- run_scripts /scripts/init-bottom
