jobs, e.g. (from the nscd job)
{ name = "nscd";
description = "Name Service Cache Daemon";
startOn = "startup";
stopOn = "shutdown";
environment = { LD_LIBRARY_PATH = nssModulesPath; };
preStart =
''
mkdir -m 0755 -p /var/run/nscd
mkdir -m 0755 -p /var/db/nscd
'';
exec = "${pkgs.glibc}/sbin/nscd -f ${./nscd.conf} -d 2> /dev/null";
};
The Upstart job is generated from this. The main goal is to provide
some abstraction from the Upstart syntax. For instance, this should
make it easier to upgrade to newer versions of Upstart, to switch to
an entirely different process management system (e.g. initng or
launchd), or to test a job independantly from Upstart. (However the
startOn and stopOn attributes are tied to Upstart's event model.)
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It allows it to know whether `libnss-mdns' is available, which clients
can ask via the `IsNSSSupportAvailable' D-Bus method.
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-> No longer install graphical packages if the xserver is disabled.
-> avoid duplication of "mkIf config.services.xserver.enable".
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ove QEMU (and other NixOS instances that use a remote filesystem like
NFS):
* Don't take down the network interfaces during shutdown.
* Don't try to unmount the Nix store. Usually, this doesn't work
because it's still in use, but on remote filesystems like CIFS the
`-f' umount flag actually works.
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disabled. Other desktop/display/window manager modules should be
conditional on config.services.xserver.enable as well, but at least
they're disabled by default due to other options.
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* Make sure that reconfiguration in the live CD works properly by
including the proper configuration module in
/etc/nixos/configuration.nix. Ugly.
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configuration. No virtual disk image is generated; the VM shares a
Nix store with the host. This makes it very fast to build new VMs.
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$ nixos-hardware-scan > /etc/nixos/hardware.nix
and import the hardware.nix module in /etc/nixos/configuration.nix.
That way you can easily rescan for new hardware.
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exists. $NIXPKGS needs to be set, otherwise NixOS can't find
Nixpkgs (because in the chroot it's in /mnt/etc/nixos/nixpkgs).
Also clear LANG to shut up Perl warnings about the locale.
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This is because fsck.ext3 takes several minutes to recover the
journal, whereas the ext3 implementation in the kernel only takes a
few seconds. I'd love to know why this is the case...
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an X server and KDE 4. Thanks to squashfs it's only 466 MiB large.
`installation-cd-small.nix' builds the original, text-only
installation CD.
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size of the i686-linux ISO image from 463 MiB to 147 MiB. Hopefully
it also speeds up installation due to reduced seek time and larger
block sizes, but I haven't tested that yet (on real hardware).
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rescue-dvd.nix (not tested though), i.e. it has all its extra
packages and includes the build-time dependencies.
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iso-image.nix contains the minimal stuff necessary to build a
bootable ISO image containing the given configuration. The idea is
that this can be customised by providing additional modules, e.g. to
add extra packages to the image.
The ISO image is exported in the configuration attribute
system.build.isoImage. So it can be built as follows:
$ nix-build lib/eval-config.nix \
--arg configuration 'import ./modules/installer/cd-dvd/iso-image.nix' \
-A config.system.build.isoImage
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package) can be overriden by setting environment.systemPackages in
/etc/nixos/configuration.nix: it shouldn't be special-cased.
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need some devices. In particular this fixes the "Cannot open
virtual console 7" errors in VirtualBox. (There's nothing special
about VirtualBox, but the different timing makes it more likely to
trigger this bug.)
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previously failed to resolve the NTP server hostnames in its config
file, it will happily sit in a loop forever doing nothing.
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start script. It's probably not necessary, but more importantly, it
can hang forever if the network is down. (Actually it will sit in a
loop waiting for UDP packets that will never arrive.) This causes
the NixOS reboot to hang, since Upstart can't kill jobs stuck in
their start script.
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enabled as a session type. Since I'm lazy, provide it
unconditionally. Also have it include "common-console" to set
device ownership when logging in.
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initialising network interfaces, etc.) to modules/tasks. This
follows the Upstart terminology: a service is a job that doesn't
usually terminate (e.g. a daemon), while a task is a job that does
some work and then exits.
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passwords is now done in an activation scriptlet rather than an
Upstart job (not tested). BTW, we should get rid of this module and
add support to the users-groups.nix module for creating accounts
with an empty password.
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modules/programs/pwdutils.
* Renamed config.system.shell to config.users.defaultUserShell and
updated the description to make clear it has to be a non-store
path.
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configuration for specific programs. For instance, ssh.nix provides
the configuration for the SSH client; ssmtp.nix provides the
configuration for the `ssmtp' MTA.
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empty now), do more of bashrc.sh declaratively, and moved nsswitch
generation to modules/config/nsswitch.nix.
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Non-valid modules are commented inside the generated list.
Move module paths which are not the module directory into the legacy.nix file.
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into a NixOS module (modules/system/activation/top-level.nix -
couldn't think of a better name). The top-level derivation is
returned in config.system.build.system.
* Inlined system.sh in top-level.nix so that we don't have to pass
everything through environment variables.
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modules/config/system-path.nix. system/system.nix is now almost
empty.
* Removed the cleanStart option - it should be possible to get the
same functionality by overriding config.system.path (or defining
config.system.systemPackages with a higher priority - don't know if
that works though).
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modules/security/setuid-wrappers.nix.
* Removed the "path" activation scriptlet. The partial ordering was
underspecified (there was nothing ensuring that it came near the end
of the activation script), and it wasn't needed in any case.
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those that run daemons) to modules/services. This probably broke
some things since there are a few relative paths in modules
(e.g. imports of system/ids.nix).
* Moved some PAM modules out of etc/pam.d to the directories of NixOS
modules that use them.
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