KQEMU was a linux kernel module for accelerating the QEMU virtual
machine on x86 hardware. Since QEMU 0.11 (and up), there is no support
for KQEMU any more, the focus is now on KVM.
http://wiki.qemu.org/KQemu/Doc
We already enable VNC and SDL support by default and adding spice only
increases the closure size from 513 MB to 518 MB.
Closure size:
du -sch $(nix-store -qR ./result)
apcupsd is a daemon for controlling APC UPSes. It is very simple to
configure. If you have an USB based UPS, the default settings should be
useable without further adjustments:
services.apcupsd.enable = true;
This will give you autodetection of USB UPSes, network access limited to
localhost (for security) and the shutdown sequence will be started when
the system when the battery level is below 50 percent, or when the UPS
has calculated that it has 5 minutes or less of remaining power-on time.
You can provide your own configuration file contents with this option:
services.apcupsd.configText = "contents of apcupsd.conf";
Bug/annoyance 1: When apcupsd calls "wall" (on powerfail etc. events),
it prints an error message because stdout is not connected to a tty (it
is connected to the journal):
wall: cannot get tty name: Inappropriate ioctl for device
The message still gets through though, to ctrl-alt-f[1-6] terminals.
Bug/annoyance 2: apcupsd tries to call "mail" (on powerfail etc.
events), and that fails because I'm not passing in any mail program at
the moment (because that would require more configuration options). A
solution to this would be to simply let the user fully configure the
apcupsd event handling logic in nix.
This is in preparation of making a stable release/branch. The version
number is <YY>.<MM>, Ubuntu style, denoting the intended release
year/month. It also has a release codename ("Aardvark").
