then every unshare(CLONE_NEWNS) system call causes a new entry to be
created in /dev/cgroup/<pid>, which is not removed automatically.
This can cause subsequent calls to unshare() to fail if the PID has
wrapped around. Worse, a large number of entries in /dev/cgroup
causes a very substantial system slowdown: doing 10,000
fork()/unshare(CLONE_NEWNS)/exit() calls took 21s without the "ns"
subsystem, but 2m43s with it, and the system slows down permanently
until the entries in /dev/cgroup are removed (going to a load of > 6
on my laptop).
This is particularly important for Nix because its chroot feature
uses unshare(CLONE_NEWNS). (http://yellowgrass.org/issue/Nix/219)
svn path=/nixos/trunk/; revision=27216
be set when udevd calls external programs. (The udev manpage claims
that udevd passes its own environment variables, but this is not the
case.)
* Get rid of some udev rule hacks that no longer seem needed.
svn path=/nixos/trunk/; revision=25991
problem is that configuration values below a mkIf are evaluated
strictly even if the condition is false. Thus "${luksRoot}" causes
an evaluation error. As a workaround, use the empty string instead
of `null' as the default value. However, we should really fix the
laziness of mkIf. It's likely that NixOS evaluation would be much
faster if it didn't have to evaluate disabled configuration values.
svn path=/nixos/trunk/; revision=24477
in /etc/xen/auto at boot time, to save all running domains during
shutdown, and to restore all saved domains at boot time.
svn path=/nixos/trunk/; revision=24121
init script. This removes the need for the `systemConfig' boot
parameter; `init=<stage-2-init>' is enough. However, the GRUB menu
builder still needs to add `systemConfig' to the kernel command line
for compatibility with old configurations.
svn path=/nixos/trunk/; revision=23775
* Moved some scriptlets to the appropriate modules.
* Put the scriptlet that sets the default path at the start, since it
never makes sense not to have it there. It no longer needs to be
declared as a dependency.
* If a scriptlet has no dependencies, it can be denoted as a plain
string (i.e., `noDepEntry' is not needed anymore).
svn path=/nixos/trunk/; revision=23762
like `build-vm', but boots using the regular boot loader (i.e. GRUB
1 or 2) rather than booting directly from the kernel/initrd. Thus
it allows testing of GRUB.
svn path=/nixos/trunk/; revision=23747
build hook uses this directory to store temporary GC roots. (It
creates it if it doesn't exist, but it's better to do it here as
well to ensure the right ownership and permissions.)
* Clear /nix/var/nix/gcroots/tmp and /nix/var/nix/temproots at boot
time.
svn path=/nixos/trunk/; revision=23417
root=... kernel command line parameter, instead of hard-coding it in
`fileSystems'. This is to allow CD-to-USB converters such as
UNetbootin to rewrite the kernel command line to the label or UUID
of the USB stick.
svn path=/nixos/trunk/; revision=23024
we want to generate the GRUB menu without actually installing GRUB
(because Amazon supplies its own pv-grub), and each menu entry
requires "root (hd0)". For the first, allow boot.loader.grub.device
to be set to "nodev" to indicate that the GRUB menu should be
generated without installing GRUB. For the second, add an option
boot.loader.grub.extraPerEntryConfig to allow commands to be added
to each GRUB menu entry (in this case, "root (hd0)").
svn path=/nixos/trunk/; revision=22712
INFORMATION" SCSI command:
https://bugzilla.redhat.com/show_bug.cgi?id=609049
As a result, `cdrom_id' doesn't print
ID_CDROM_MEDIA_TRACK_COUNT_DATA, which in turn prevents the
/dev/disk/by-label symlinks from being created. We need these in
the NixOS installation CD, so use ID_CDROM_MEDIA in the
corresponding udev rules for now. This was the behaviour in udev <=
154. See also
http://www.spinics.net/lists/hotplug/msg03935.html
svn path=/nixos/trunk/; revision=22691
screws up the X server (CPU usage goes to 100%, switching virtual
consoles no longer works, etc.). TODO: we need some generic way to
mark jobs that shouldn't be started automatically.
svn path=/nixos/trunk/; revision=22608
current namespace). This prevents warnings about the aufs/tmpfs
mounts from the initrd used by the installation CD.
svn path=/nixos/branches/boot-order/; revision=22299
shutdown. (Portmap and statd are needed during shutdown to unmount
NFS volumes but have open files in /var/run.)
* In the shutdown job, don't kill PIDs belonging to Upstart jobs that
are still running. If they don't stop on the "starting shutdown"
event, then they're needed during shutdown (such as portmap and
statd).
* NFS test: test whether the shutdown quickly unmounts NFS volumes
(i.e. whether portmap and statd are still running).
svn path=/nixos/branches/boot-order/; revision=22204
swapfiles cannot be unmounted or even remounted read-only.
* In the remount, pass `-t none' to get a more informative error
message if the filesystem is in use.
svn path=/nixos/branches/boot-order/; revision=22179
`su'.
* The `usermod' from `shadow' allows setting a supplementary group
equal to the user's primary group, so the special hack for the
`nixbld' group is no longer needed.
* Removed /etc/default/passwd since it's not used by the new passwd.
The hash is configured in pam_unix.
* Move some values for `security.setuidPrograms' and
`security.pam.services' to the appropriate modules.
svn path=/nixos/trunk/; revision=22107
This ensures that they're gone by the time the shutdown job runs, so
it doesn't have to stop them itself.
* Don't respawn tasks, as it doesn't seem useful (if they fail they're
likely to fail again if they're restarted).
svn path=/nixos/trunk/; revision=22099
to use the standard (coreutils) tools.
* Use util-linux's `switch_root' to switch over to the target root
FS. It automatically moves over the /dev, /proc and /sys from stage
1, so stage 2 doesn't need to set them up again.
svn path=/nixos/trunk/; revision=22085
By default, they take the usual value of "50% of physical RAM".
As /dev/shm can be filled by anyone, and tmpfs does not trigger the OOM killer (and
can hang the machine due to a lack of RAM), I need to configure that down
in order to avoid crashes.
There is still left the /var/run/nscd tmpfs filesystem, also created with 50%
of the RAM, but at least not writeable by anyone. We could find a reasonable
low value for that, or allow configuration.
svn path=/nixos/trunk/; revision=21140
the current configuration don't match the running kernel. This
ensures that modprobe still works after a "nixos-rebuild switch" to
a configuration that has a different kernel version.
svn path=/nixos/trunk/; revision=19696
to the nixpkgs trunk 'kernelPackages'.
Seeing a strange kernelPackages mentioned in installation-cd-rescue (2.6.31_something) I
update that to 2.6.32.
svn path=/nixos/trunk/; revision=19443
readd r19267 (the issue should be fixed now)
Eelco Dolstra and Nicolas Pierron both kept asking me to pay attention
to the rendered manual. There is one catch: example settings such as
pkgs.kernelPackages_2_6_25 are correct however they don't render
properly. Moreover you don't want those examples to be evaluated (maybe
compiling a kernel ?) when building the manual only.
So use Strings and add a copy & paste note.
This is still a hacky. Maybe a kind of typed "verbatim" expression
should be added (?)
svn path=/nixos/trunk/; revision=19281
pkgs/build-support/vm). This should make the NixOS regression tests
more robust on heavily loaded systems, where they now frequently
fail:
server# mounting //10.0.2.4/qemu on /hostfs...
server# [ 8.233991] Slow work thread pool: Starting up
server# [ 8.234721] Slow work thread pool: Ready
server# [ 23.271708] CIFS VFS: No response for cmd 114 mid 1
server# [ 23.272443] CIFS VFS: cifs_mount failed w/return code = -112
server# mount: Host is down
server# [ 23.275188] Kernel panic - not syncing: Attempted to kill init!
Maybe there is a configurable timeout somewhere, which would be much
nicer...
svn path=/nixos/trunk/; revision=19248
write some magic string to ttyS0. This removes the dependency on
having a CIFS mount.
* Use a thread to process the stdout/stderr of each QEMU instance.
* Add a kernel command line parameter "stage1panic" to tell stage 1 to
panic if an error occurs. This is faster than waiting until
connect() times out.
svn path=/nixos/trunk/; revision=19212
/nix bind mounted from a fs not rootfs.
As niksnut found, if the sources of bind mounted directories are
umounted before remounting them as "ro", a "mount -o remount,ro" on the
bind targets will not leave the filesystem properly umounted, the same
way as a "-o remount,ro" would do on a usual filesystem.
So, the trick of always remounting as 'ro' before attempting an umount seems
to fix the problem.
svn path=/nixos/trunk/; revision=19008
GRUB version changes. (That's the complete version from the name
attribute, not the boot.loader.grub.version attribute.) The current
version is recorded in /boot/grub/version. This is required to
prevent massive breakage when we change the default value of
boot.loader.grub.version to "2".
svn path=/nixos/trunk/; revision=18997
modules that should be added to the initrd, but should only be
loaded on demand (e.g. by the kernel or by udev). This is
especially useful in the installation CD, where we now only load the
modules needed by the hardware.
* Enable automatic modprobing by udev in the initrd.
svn path=/nixos/trunk/; revision=18975
automatically loaded by the kernel, load it at boot time.
* Put the ext2 module (which used to be built in) in the initrd to
prevent unexpected breakage.
svn path=/nixos/trunk/; revision=18963
qemu_kvm. Installation doesn't take place yet. VM is started
printing a remote controlled "Hello".
This serves as example how to run a vm within a bulid job.
svn path=/nixos/trunk/; revision=18887
unmounted or at least remounted read-only during shutdown. Upstart
0.6 apparently uses nscd to do some name lookups, resulting in it
holding some mmap mappings to deleted files in /var/run/nscd.
E.g. lsof shows:
init 1 root DEL REG 253,0 1850313 /var/run/nscd/dbyn3Piz
init 1 root DEL REG 253,0 1850312 /var/run/nscd/dbt2e8PH
See also http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=324900.
This is a workaround - it would be better if Upstart didn't do this.
svn path=/nixos/branches/upstart-0.6/; revision=18258
statically configured interface (i.e. we're not running dhclient).
Otherwise the ntpd job won't be triggered.
* Use the "-n" flag of "initctl emit" to send the event
asynchronously.
svn path=/nixos/branches/upstart-0.6/; revision=18227
no longer emits specific events for those. Instead it emits a
"runlevel" event. The "runlevel" task starts the "shutdown" task to
perform the desired action.
* Upstart 0.6 no longer has a "shutdown" event, so "stop on shutdown"
no longer works. Therefore the shutdown task explicitly stops all
running Upstart jobs, before sending a TERM/KILL signal to all
remaining processes.
* Do a "chvt 1" at the start of the shutdown task to switch to the
console.
* Use /dev/console instead of /dev/tty1, since if somebody is logged
in on tty1, bad things will happen.
svn path=/nixos/branches/upstart-0.6/; revision=18224
is "ready". This prevents ugly race conditions, e.g. HAL failing to
start because dbus hasn't finished starting yet.
* Support post-start scripts. These are executed after the job's main
process has started but before the job's "started" event is
emitted. For instance, the udev job uses this to perform "udevadm
trigger / settle" to create all devices. Previously this had to be
done in the pre-start script, so the daemon had to started in the
pre-start script as well.
svn path=/nixos/branches/upstart-0.6/; revision=18211
* Replace an obscure piece of code by its equivalent based on the
recursiveUpdate function. Undefined the obsolete name of
boot.grubDevice to avoid conflicts.
svn path=/nixos/trunk/; revision=18049
with an empty password, rather than with a hashed empty password.
The latter is a security risk, because it allows remote root logins
if a user enables sshd before setting a proper root password.
* Allow empty passwords for login and slim, but nothing else.
svn path=/nixos/trunk/; revision=17833
style of declaring Upstart jobs. While at it, converted them to the
current NixOS module style and improved some option descriptions.
Hopefully I didn't break too much :-)
svn path=/nixos/trunk/; revision=17761
Purpose: Allow overwriding of properties such as:
config.jobAttrs.sshd.startOn = "never";
thanks to Nicolas Pierron for reviewing and
extending nixpkgs to make this possible
I'll convert most of the jobs ASAP so please don't care
about the depreceateion much right now
svn path=/nixos/trunk/; revision=17650
* Renamed some of the new Grub options to more sensible names
(e.g. extraGrubEntries to extraEntries, bootMount to bootDevice,
etc.).
svn path=/nixos/trunk/; revision=17494
grub. Its options are no more inside 'boot', but inside 'boot.loader.grub'.
I added a new bootloader configuration for nixos, generationsDir. It creates
/boot/default/{init,initrd,kernel,system} symlinks, and the same for the generations
in /boot/system-$gen/{init,initrd,kernel,system}.
I can program the u-boot loader to load /boot/default files always, and have
a minimal nixos boot loader installer functionality. Additionally, I can refer
to the other system generations easily, with a simple 'ls' in /boot.
svn path=/nixos/trunk/; revision=17460
* Change the module syntax of the example to follow Eelco's suggestions.
* Add a section "Building your own NixOS CD", which explain how to replace
configuration.nix by the configuration file of a live CD/DVD.
* Fix "Testing the installer" and "Testing the initrd" to fit the location
of derivations.
svn path=/nixos/trunk/; revision=17105
into one argument "modules".
* release.nix: fixed the manual job.
* ISO generation: break an infinite recursion. Don't know why this
suddenly happens. Probably because of the nixpkgs.config change,
but I don't see why. Maybe the option evaluation is too strict.
svn path=/nixos/trunk/; revision=16878
util-linux-ng instead of e2fsprogs, blkid is in util-linux-ng, and
we need to manually create /dev/.udev prior to starting udevd for
some reason.
svn path=/nixos/trunk/; revision=16691
(e.g. --install-grub instead of $NIXOS_INSTALL_GRUB). Also support
some nix-build options (e.g. --show-trace and -j).
svn path=/nixos/branches/modular-nixos/; revision=16560
jobs, e.g. (from the nscd job)
{ name = "nscd";
description = "Name Service Cache Daemon";
startOn = "startup";
stopOn = "shutdown";
environment = { LD_LIBRARY_PATH = nssModulesPath; };
preStart =
''
mkdir -m 0755 -p /var/run/nscd
mkdir -m 0755 -p /var/db/nscd
'';
exec = "${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.)
svn path=/nixos/branches/modular-nixos/; revision=16376
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.
svn path=/nixos/branches/modular-nixos/; revision=16036
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...
svn path=/nixos/branches/modular-nixos/; revision=15965
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).
svn path=/nixos/branches/modular-nixos/; revision=15930
