Add warning to the documentation of
`virtualisation.docker.storageDriver` that changing will cause any
existing containers and images to become inaccessible.
waagent's extension `Microsoft.OSTCExtensions.VMAccessForLinux` requires Python, otherwise it would be failed to install with the following error message in `/var/log/waagent.log`:
```
No Python interpreter found on the box
```
waagent's extension `Microsoft.CPlat.Core.RunCommandLinux` needs lsof, otherwise it would produce the following error message in `/var/log/waagent.log`:
```
/var/lib/waagent/Microsoft.Azure.Extensions.CustomScript-2.1.10/bin/custom-script-shim: line 60: lsof: command not found
```
The virtualisation.directBoot.initrd option was added for netboot
images, but the assertion to check directBoot enabled if it was used
caused an infinite recursion if it was. Minimal reproduction:
import nixos/tests/make-test-python.nix ({ pkgs, ... }: {
name = "";
nodes = {
machine = { config, ...}: {
imports = [ nixos/modules/installer/netboot/netboot-minimal.nix ];
virtualisation.directBoot = {
enable = true;
initrd = "${config.system.build.netbootRamdisk}/${config.system.boot.loader.initrdFile}";
};
};
};
testScript = "";
}) {}
The fix is to swap the two conditions, so that cfg.directBoot.enable
is checked first, and the initrd comparision will be short circuited.
This wasn't noticed during review because in earlier versions of the
virtualisation.directBoot patch, the assertion was accidentally in the
conditional above, so wasn't evaluated unless port forwarding was in
use.
The idea is to run an async process waiting for swtpm
and we have to ensure that `FD_CLOEXEC` is cleared on this process'
stdin file descriptor, we use `fdflags` for this, a loadable builtin in
Bash ≥ 5.
The async process when exited will terminate `swtpm`, we bind the
termination of the async process to the termination of QEMU by virtue of
having `qemu` exec in that Bash script.
Signed-off-by: Arthur Gautier <baloo@superbaloo.net>
Co-authored-by: Raito Bezarius <masterancpp@gmail.com>
Recent change to nixos-rebuild (https://github.com/NixOS/nixpkgs/pull/258571)
adds systemd-run, which brings with it a cleaner environment
(ie $PATH not available).
Workaround: use absolute path for ln to avoid command-not-found error
This commit makes auto-restarting declarative containers optional.
This is useful when you don't want changes to your config to automatically
restart the container and thus stop any applications running inside it.
Allow the user to disable overriding the fileSystems option with
virtualisation.fileSystems by setting
`virtualisation.fileSystems = lib.mkForce { };`.
With this change you can use the qemu-vm module to boot from an external
image that was not produced by the qemu-vm module itself. The user can
now re-use the modularly set fileSystems option instead of having to
reproduce it in virtualisation.fileSystems.
A couple notes:
---------------
Adding invalid `console=` parameters is not an issue. Any invalid
console is unused. The kernel will use the "rightmost" (last) valid
`console=` parameter as the default output. Thus the SBBR-mandated AMA0
on A1, and ttyS0 on x86_64 as documented by Oracle.
`nvme_core.shutdown_timeout=10` was added as it was written this way in
the A1 images. Unclear whether `nvme.shutdown_timeout=10` is wrong. At
worst this is a no-op.
This commit makes the OpenSSH option `PermitRootLogin` available to be
configured by other NixOS modules when using the Google Cloud Engine
(GCE) NixOS image builder. Other options like `PasswordAuthentication`
were already configurable, so I think it makes sense to make `PermitRootLogin`
configurable as well is order to disable it completely, for example.
NOTES:
@jakeschurch did not realize that is was already updated on master, but not
backported to 23.05 channel
Signed-off-by: Jake Schurch <jakeschurch@gmail.com>
We were setting the systemd pre-start script through the
systemd.services.<name>.preStart NixOS option. This option uses a
string containing the pre-start script as input.
In some scenarios, you want to extend this script to perform some
additional actions before launching a container.
At the moment, your only option is to mkForce the pre-start string and
rewrite a preStart script from scratch. Potentially vendoring the
Nixpkgs pre-start script in your custom pre-start script. (you can
also create a new service unit in charge of running the custom
pre-start and create a dependency link between the units, but that's
also sub-optimal).
The systemd.services.<name>.serviceConfig.ExecStartPre NixOS option
gives us a better way to extend a pre-start script. Instead of being a
simple script, this option can be a list of scripts. The NixOS module
system then merges the multiple list declarations instead of
overriding them. Meaning that if we use this ExecStartPre option, we
can trivially extend the exec-start script: just add the custom script
in the systemd service override and you're done.
ExecStartPre behaves a tiny bit differently from preStart. Instead of
expecting a string containing a script, it expects a path pointing to
a script. We take advantage of this API change to check the pre-start
script with shellCheck via the pkgs.writeShellApplication function.
This change removes the bespoke logic around identifying block devices.
Instead of trying to find the right device by iterating over
`qemu.drives` and guessing the right partition number (e.g.
/dev/vda{1,2}), devices are now identified by persistent names provided
by udev in /dev/disk/by-*.
Before this change, the root device was formatted on demand in the
initrd. However, this makes it impossible to use filesystem identifiers
to identify devices. Now, the formatting step is performed before the VM
is started. Because some tests, however, rely on this behaviour, a
utility function to replace this behaviour in added in
/nixos/tests/common/auto-format-root-device.nix.
Devices that contain neither a partition table nor a filesystem are
identified by their hardware serial number which is injecetd via QEMU
(and is thus persistent and predictable). PCI paths are not a reliably
way to identify devices because their availability and numbering depends
on the QEMU machine type.
This change makes the module more robust against changes in QEMU and the
kernel (non-persistent device naming) and by decoupling abstractions
(i.e. rootDevice, bootPartition, and bootLoaderDevice) enables further
improvement down the line.
As with many things, we have scenarios where we don't want to boot on a
disk / bootloader and also we don't want to boot directly.
Sometimes, we want to boot through an OptionROM of our NIC, e.g. netboot
scenarios or let the firmware decide something, e.g. UEFI PXE (or even
UEFI OptionROM!).
This is composed of:
- `directBoot.enable`: whether to direct boot or not
- `directBoot.initrd`: enable overriding the
`config.system.build.initialRamdisk` defaults, useful for
netbootRamdisk for example.
This makes it possible.
