This option requests compatibility with older NixOS releases with
respect to stateful data, in cases where new releases have defaults
that might be incompatible with system state of existing NixOS
deployments. For instance, if we change the default version of
PostgreSQL, existing deployments will break if the new version can't
read databases created by the old version.
So for example, setting
system.stateVersion = "15.07";
requests that options like services.postgresql.package use defaults
corresponding to the 15.07 release branch. Note that
nixos-generate-config emits this option. (In the future, NixOps may
set system.stateVersion to the NixOS release in use when the machine
was created.)
See also #7939 for another motivating example.
The resulting image can be copied to a SD card with `dd` and is directly
bootable by a suitably configured U-Boot. Though depending on the board, some
extra steps are required for copying U-Boot itself to the SD card.
Inside the image is a partition table, with a FAT32 /boot and a normal
writable EXT4 rootfs. It's possible to directly reuse the SD image's
partition layout and "install" NixOS on the same SD card by replacing
the default configuration.nix and nixos-rebuild, and actually is the
preferred way to use these images. To assist in this installation
method, the boot scripts on the image automatically resize the rootfs
partition to fit the SD card on the first boot.
The SD images come in two flavors; one for the ARMv6 Raspberry Pi,
and one multiplatform image for all the boards supported by the
mainline kernel's multi_v7_defconfig config target. At the moment, these
have been tested on:
- Raspberry Pi Model B (512MB model)
- NVIDIA Jetson TK1
- Linksprite pcDuino3 Nano
To build, run:
nix-build '<nixpkgs/nixos>' -A config.system.build.sdImage \
-I nixos-config='<nixpkgs/nixos/modules/installer/cd-dvd/sd-image-armv7l-multiplatform.nix>'
It comes in handy to alter the menu label if you're not building a NixOS
installer image but for example if you want to build a live system and
still want to re-use the iso-image.nix module.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Should fix at least nixos.tests.installer.simple.x86_64-linux
http://hydra.nixos.org/build/23001712:
machine# error: cannot download Encode-Locale-1.03.tar.gz from any mirror
machine# builder for ‘/nix/store/y8gbx2d2fdcvvjy1z53xksfgq66ydlx0-Encode-Locale-1.03.tar.gz.drv’ failed with exit code 1
machine# cannot build derivation ‘/nix/store/y1knci7rix3asnh2b4kfv8jhl2j99xih-perl-Encode-Locale-1.03.drv’: 1 dependencies couldn't be built
machine# cannot build derivation ‘/nix/store/7xspjwh48kg16drv1jjg5cffaqbxbp8p-perl-libwww-perl-6.05.drv’: 1 dependencies couldn't be built
machine# cannot build derivation ‘/nix/store/8qsmz3bbk1jwhh50c3i9700bkmn8ns5c-nss-cacert-3.19.1.drv’: 1 dependencies couldn't be built
machine# cannot build derivation ‘/nix/store/0rgf2l3mdszs4a989ympwc9gk2k8wq6z-nixos-artwork-e71b684.drv’: 1 dependencies couldn't be built
...
Commit 159fed47bc (nixos/grub: Fix video display on efi) changed BIOS
systems to start in non-text mode as well. Enable FB_VESA to get a
framebuffer console on BIOS systems. Change FRAMEBUFFER_CONSOLE to 'y'
instead of the default 'm' to so the user doesn't need to manually load
the fbcon module anymore.
Other distros have similar defaults, at least on Arch:
CONFIG_FB_VESA=y
CONFIG_FRAMEBUFFER_CONSOLE=y
and on Ubuntu (12.04):
CONFIG_FB_VESA=m
CONFIG_FRAMEBUFFER_CONSOLE=y
Fixes#8139
Passing the chroot flag to nixos-install without arguments should now give you a
Bash shell as intended rather than try an empty path.
This was masked by the user's shell (usually /bin/bash) being defaulted to by
chroot, and being found since their paths used NixOS conventions.
When bootstrapping from other distributions, nixos-install is unable to find
various tools in the chroot since their paths aren't aware of NixOS conventions.
This makes a small change to existing code by specifying nixpkgs/nixos instead
of just nixos when running nix-instantiate in the chroot. I haven't tested this
outside of bootstrapping, but the same specification is used elsewhere in the
code so I don't see why it wouldn't work.
This partially reverts commit 3a4fd0bfc6.
Addresses another concern by @edolstra that users might not want to
update *all* channels. We're now reverting to the old behaviour but
after updating the "nixos" channel, we just check whether the channel
ships with a file called ".update-on-nixos-rebuild" and if it exists, we
update that channel as well.
Other channels than these are not touched anymore.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Should make it even easier to use custom channels, because whenever the
user does a "nixos-rebuild --upgrade", it will also upgrade possibly
used ("used" as in referenced in configuration.nix) channels besides
"nixos". And if you also ship a channel tied to a particular version of
nixpkgs or even remove the "nixos" channels, you won't run into
unexpected situations where the system is not updating your custom
channels.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Fixes#6795.
This was co-authored with @bobvanderlinden.
(cherry picked from commit e19ac248ae59fd327c32b1ae3e37792c22a7c7ac)
Signed-off-by: Domen Kožar <domen@dev.si>
Conflicts:
nixos/modules/installer/cd-dvd/iso-image.nix
There are a number of hidden restrictions on the syslinux
configuration file that come into play when UNetbootin
compatiblity is desired. With this commit these are documented.
This changes the bootloader for iso generation from Grub to
syslinux. In addition this adds USB booting support, so that
"dd" can be used to burn the generated ISO to USB thumbdrives
instead of needing applications like UnetBootin.
‘nixos-rebuild dry-activate’ builds the new configuration and then
prints what systemd services would be stopped, restarted etc. if the
configuration were actually activated. This could be extended later to
show other activation actions (like uids being deleted).
To prevent confusion, ‘nixos-rebuild dry-run’ has been renamed to
‘nixos-rebuild dry-build’.
Since we're using HTTPS for the binary cache (introduced in faf0797) by
default, the binary cache should also be available during installation.
The file that is defined in SSL_CERT_FILE outside of the chroot is
copied over to /tmp/ca-cert.crt inside the chroot, so we have an
absolute path we can reference during nixos-install. However, this might
end up with the file not being cleaned up properly from outside of the
store, but neither would be /tmp/root so the cleanup issue needs to be
solved in another place (or commit to be more exact).
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Especially new users could be confused by this, so we're now marking
services.virtualbox.enable as obsolete and defaulting to
services.virtualboxGuest.enable instead. I believe this now makes it
clear, that this option is for guest additions only.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
The NixOS manual says modules have the following signature:
{ config, lib, pkgs, ... }:
But our generated configuration.nix file lacks the 'lib' part. Add it.
The host id value gets generated by reading a 32-bit value from
/dev/urandom.
This makes programs that rely on a correct host id more reliable.
It also makes using ZFS more seamless, as you don't need to configure
the hostId manually; instead, it becomes part of your config from the
moment you install NixOS.
The old boot.spl.hostid option was not working correctly due to an
upstream bug.
Instead, now we will create the /etc/hostid file so that all applications
(including the ZFS kernel modules, ZFS user-space applications and other
unrelated programs) pick-up the same system-wide host id. Note that glibc
(and by extension, the `hostid` program) also respect the host id configured in
/etc/hostid, if it exists.
The hostid option is now mandatory when using ZFS because otherwise, ZFS will
require you to force-import your ZFS pools if you want to use them, which is
undesirable because it disables some of the checks that ZFS does to make sure it
is safe to import a ZFS pool.
The /etc/hostid file must also exist when booting the initrd, before the SPL
kernel module is loaded, so that ZFS picks up the hostid correctly.
The complexity in creating the /etc/hostid file is due to having to
write the host ID as a 32-bit binary value, taking into account the
endianness of the machine, while using only shell commands and/or simple
utilities (to avoid exploding the size of the initrd).
This changes the bootloader for iso generation from Grub to
syslinux. In addition this adds USB booting support, so that
"dd" can be used to burn the generated ISO to USB thumbdrives
instead of needing applications like UnetBootin.
