When a NixOS system uses flakes, i.e., /etc/nixos/flake.nix exists, it
is impossible to use nixos-rebuild to build a pre-flake
configuration.nix. Of course, one can directly use nix command to
build the configuration, but not everybody remembers the correct nix
options to do that.
With the new option, it is possible to build a pre-flake configuration
with command like this:
nixos-rebuild build-vm -I nixos-config=./vm.nix --no-flake
The option might be useful for people following older pre-flake
tutorials on a flake-based system.
In https://github.com/NixOS/nixpkgs/pull/142747, the implementation
behind Machine.execute() has been changed to pipe all the command's
output into base64 on the guest machine.
Unfortunately this means that base64 is blocking until stdout is closed,
which in turn means that we now need to make sure that whenever we run a
program in background via "&" we also need to make sure to close stdout,
which we do by redirecting stdout to stderr.
Signed-off-by: aszlig <aszlig@nix.build>
This adds the option `networking.wg-quick.interfaces.<name>.autostart`, which defaults to `true`, which is the previous behavior. With this option set to `false`, the systemd-unit will no longer be set to `wantedBy = [ "multi-user.target" ]` and therefore the tunnel has to be enabled/disabled via `systemctl start/stop wg-quick-<name>`.
Co-authored-by: pennae <82953136+pennae@users.noreply.github.com>
Naively deduplicate VLANs in the python driver for NixOS tests. The
current implementation accidentally works, since the VLan class mutates
the environment. On construction it sets QEMU_VDE_SOCKET_${id} and this
environment variable gets overwritten once a second VLAN with the same
id is constructed. Because the NIC flags passed to qemu just use the
QEMU_VDE_SOCKET_${id} environment variable, this implicitly chooses a
single vde_switch process for each VLAN.
However, this leads to unusable vde_switch processes being spawned in
each test run and as a side effect makes it impossible to access the
correct VLan objects in the interactive test driver. It also makes it
remarkably hard to understand why the current implementation ever
worked.
The Nix-provided `nix-daemon.socket` file has a
> ConditionPathIsReadWrite=/nix/var/nix/daemon-socket/socket
line, to skip that unit if /nix/var/nix/daemon-socket/socket is
read-only (which is the case in some nixos-containers with that folder
bind-ro-mounted from the host).
In these cases, the unit was skipped.
Systemd 250 (rightfully) started to also skip in these cases:
> [ 237.187747] systemd[1]: Nix Daemon Socket was skipped because of a failed condition check (ConditionPathIsReadWrite=/nix/var/nix/daemon-socket).
However, systemd < 250 didn't skip if /nix/var/nix/daemon-socket/socket
didn't /exist at all/, and we were relying on this bug in the case for
fresh NixOS systems, to have /nix/var/nix/daemon-socket/socket created
initially.
Move the creation of that folder to systemd-tmpfiles, by shipping an
appropriate file in `${nixPackage}/lib/tmpfiles.d/nix-daemon.conf`
(NixOS/nix#6285).
In the meantime, set a systemd tmpfiles rule manually in NixOS.
This has been tested to still work with read-only bind-mounted
/nix/var/nix/daemon-socket/socket in containers, it'll keep them
read-only ;-)
some change in the last 24 hours altered the behaviour of st such that
it now dies with a non-zero exit code when the shell exits, so kill is
now necessary
