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nixos/libvirtd: support out-of-tree vhost-user drivers

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Add an option allowing packages containing out-of-tree vhost-user drivers for
QEMU to be specified. The relevant configurations are then linked at runtime
where libvirt expects them.
An example use case for this is virtiofs.
This commit is contained in:
Alois Wohlschlager 2023-12-31 07:25:34 +01:00 committed by Alyssa Ross
parent 62c8b51c27
commit 77e5fa5ea6
1 changed files with 17 additions and 0 deletions
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17
nixos/modules/virtualisation/libvirtd.nix
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@ -116,6 +116,15 @@ let
QEMU's swtpm options.
'';
};
vhostUserPackages = mkOption {
type = types.listOf types.package;
default = [ ];
example = lib.literalExpression "[ pkgs.virtiofsd ]";
description = lib.mdDoc ''
Packages containing out-of-tree vhost-user drivers.
'';
};
};
};
@ -502,6 +511,14 @@ in
# https://libvirt.org/daemons.html#monolithic-systemd-integration
systemd.sockets.libvirtd.wantedBy = [ "sockets.target" ];
systemd.tmpfiles.rules = let
vhostUserCollection = pkgs.buildEnv {
name = "vhost-user";
paths = cfg.qemu.vhostUserPackages;
pathsToLink = [ "/share/qemu/vhost-user" ];
};
in [ "L+ /var/lib/qemu/vhost-user - - - - ${vhostUserCollection}/share/qemu/vhost-user" ];
security.polkit = {
enable = true;
extraConfig = ''