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.
Adds a new option to the virtualisation modules that enables specifying explicitly named network interfaces in QEMU VMs.
The existing `virtualisation.vlans` option is still supported for cases where the name of the network interface is irrelevant.
Libvirt support calling user defined hooks on certains events.
Documentation can be found https://libvirt.org/hooks.html.
This commit allow specifying these hooks via the
virtualisation.libvirtd.hooks.<name>.* options
Calling `eval-config.nix` without a `system` from a Nix flake fails with
`error: attribute 'currentSystem' missing` since #230523. Setting
`system = null` removes the use of `currentSystem` and instead uses the
value from the `nixpkgs` module.
Context summary:
'vma create' can't otherwise write to tmpfs such as /dev/shm.
This is important when used from non-nixos machines which may
have /build as tmpfs.
VMA is Proxmox's virtual machine image format that wraps QEMU images,
augmenting these with proxmox-specific configuration file.
proxmox-image.nix uses the VMA tool to create vma image files.
The VMA tool exists as a patchset ontop of QEMU.
VMA writes its output with open() and O_DIRECT flag.
O_DIRECT does not work on Linux tmpfs [1]. Thus:
$ vma create ~/output.vma ... # works, assuming home isn't tmpfs.
$ vma create /dev/shm/output.vma ... # fails since /dev/shm is tmpfs
Failure results in assert(*errp == NULL).
O_DIRECT is a cache performance hint.
But it currently blocks our usage of nixos-generate -f proxmox from
Non-NixOS hosts and Docker.
The patch here simply removes O_DIRECT:
vma-writer.c later performs memalign due to O_DIRECT, but this is
safe to do with or without O_DIRECT.
Ideally, this should be fixed in upstream Proxmox: Perhaps by falling
back to open without O_DIRECT.
Another attempt to fix this SIGABRT is [2], which writes the vma file
directory to $out/ folder -- however that may still be tmpfs mounted
which it is in our case.
[1] https://lore.kernel.org/lkml/45A29EC2.8020502@tmr.com/t/
[2] https://github.com/NixOS/nixpkgs/pull/224282
`useEFIBoot` is somewhat misleading, but we should make it possible to
enable UEFI environment / firmware without buying into a bootloader.
This makes it possible.
Previously, it was possible to run with a tmpfs / with
`virtualisation.diskImage = null;`, this was likely broken by my changes
in 4b4e4c3ef9.
It is reintroduced by disabling properly the bootloader for now, as it
is complicated to make it work with.
Now that `useBootLoader` produces a full system image, moving disk
images can be slow because they have a full Nix store in them.
It does not make sense to keep the 9p mountpoint to shadow the
/nix/store of the VM.
We disable it if we have `useBootLoader` and introduce an option for
easy overrides.
This option has been introduced in 678eed323f without realizing there was this
PR inflight, unfortunately, it collide with what this PR does and make
it irrelevant.
Therefore, I remove it here.
trying to get all of the podman functionality to work with the wrapper
is becoming more complicated with each release, it isn't sustainable
removing the wrapper does mean that using extraPackages will need to build from source
- remove unnecessary serviceConfig overrides
- set HELPER_BINARIES_DIR to libexec/podman
- use install.bin target on linux for podman/tmpfiles
- also installs quadlet/rootlessport in libexec
- symlink binaries from helpersBin into HELPER_BINARIES_DIR
- remove unnecessary rootlessport output
- remove unnecessary substituteInPlace
The typo creates an empty directory 0755 in initrd rootfs rather than
create the Nix store directories with mode 0755.
I guess setting the mode is not strictly necessary if it worked before
this change, but I'll leave the `-m 0755` in just in case.
trying to get all of the podman functionality to work with the wrapper
is becoming more complicated with each release, it isn't sustainable
removing the wrapper does mean that using extraPackages will need to build from source
- include pkgs.zfs by default in the wrapped podman used by the module so it is cached
- anyone using zfsUnstable will need to build from source
- remove unnecessary serviceConfig overrides
- set HELPER_BINARIES_DIR during build
- use install.bin target on linux for podman/tmpfiles
- also installs quadlet/rootlessport in libexec
- remove unnecessary rootlessport output
- remove unnecessary substituteInPlace
This is because vSphere version 6.7.0.51000 errors with
Issues detected with selected template. Details: -
78:7:VALUE_ILLEGAL: Value ''3'' of Parent element does not refer
to a ref of type DiskControllerReference.
when using SATA.
