BusyBox doesn't handle the "auto" filesystem type very well: fsck will
just ignore such filesystems, and mount will only work properly if the
required kernel module is already loaded. Therefore, use blkid to
determine the filesystem type.
Also generate an /etc/fstab in the initrd rootfs on the fly. This is
useful if you're dropped into an emergency shell since it allows you
to say "fsck /dev/sda1" or "mount /dev/sda" and have the right thing
happen.
Using BusyBox instead of Bash plus a bunch of other tools gives us a
much more feature-full, yet smaller initrd. In particular, BusyBox
contains networking commands such as ip and a DHCP client, useful for
NFS boots. It's also much more convenient for rescue situations
because the shell has builtin readline support and there are many more
tools (including vi).
Upstart requires /dev/ptmx since its 1.4, and will lock up in case of it missing.
I was hitting this in the fuloong, where I don't use the nixos initrd.
svn path=/nixos/trunk/; revision=34429
* Load scsi_wait_scan after all other kernel modules to ensure that
all SCSI device nodes have been created.
* Increase the timeout for the appearance of the root device to 20
seconds.
* Do a "udevadm settle" just after the root device has appeared to
make sure that udev isn't accessing the device anymore (hopefully).
On EC2 (Xen), I've seen fsck on the root fail randomly with "device
in use" errors.
svn path=/nixos/trunk/; revision=33650
* Add a slash to the end of $MODULE_DIR, as expected by depmod. (Not
that running depmod from the command line is all that useful, since
you can't use it to update the tree in the Nix store. But at least
commands like "depmod -n" work now.) Reported by Kirill Elagin on
IRC.
svn path=/nixos/trunk/; revision=33312
It needs udevd to be running because the modules may require
firmware. Thanks to Mathijs and Arie for pointing this out.
svn path=/nixos/trunk/; revision=33234
modprobe.
* Move the implementation of boot.kernelModules from the udev job to
the activation script. This prevents races with the udev job.
* Drop references to the "capability" kernel module, which no longer
exists.
svn path=/nixos/trunk/; revision=33208
This allows setting a fixed device name per array, thus ensuring that at boot,
the arrays will always be mounted with the same names. I think this allows
solving the problem of grub getting confused about softraid device names
(prefix and root), if the devices always get the same naming at initrd.
svn path=/nixos/trunk/; revision=33033
I set it as default because users can benefit of this without having to prepare
their nixos first, and I don't think it will break any nixos for the initrd
size increase.
It can be disabled with 'boot.initrd.withExtraTools = false'.
svn path=/nixos/trunk/; revision=33000
