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|
{
config,
lib,
pkgs,
...
}:
let
cfg = config.services.emile.libvirtnix;
in
{
options.services.emile.libvirtnix = with lib; {
enable = mkEnableOption "enable libvirtnix";
instances = mkOption {
type = types.attrsOf (
types.submodule (
{ name, ... }:
{
options = {
enable = mkEnableOption "enable this instance";
domain = mkOption {
type = types.submodule (import ./domain.nix);
};
};
}
)
);
default = { };
description = ''
A full libvirt config, statically defined using nix.
'';
example = ''
{
domain = {
name = "vm";
};
}
'';
};
};
config = lib.mkIf cfg.enable {
systemd.services = lib.mapAttrs' (
name: guest:
lib.nameValuePair "libvirtd-guest-${name}" {
after = [ "libvirtd.service" ];
requires = [ "libvirtd.service" ];
wantedBy = [ "multi-user.target" ];
serviceConfig = {
Type = "oneshot";
RemainAfterExit = "yes";
};
script =
let
xml =
pkgs.writeText "libvirt-guest-${name}.xml" ''<domain ''
+ (lib.optionalString (guest.domain.type != "") "type='${guest.domain.type}' ")
+ (lib.optionalString (guest.domain.id != 0) "id='${guest.domain.type}'")
+ ''>''
+ (lib.optionalString (guest.domain.name != "") "<name>${guest.domain.name}</name>")
+ (lib.optionalString (guest.domain.name != "") "<name>${guest.domain.name}</name>")
+ (lib.optionalString (guest.domain.uuid != "") "<uuid>${guest.domain.uuid}</uuid>")
+ (lib.optionalString (guest.domain.genid != "") "<genid>${guest.domain.genid}</genid>")
+ (lib.optionalString (guest.domain.title != "") "<title>${guest.domain.title}</title>")
+ (lib.optionalString (
guest.domain.description != ""
) "<description>${guest.domain.description}</description>")
+ (lib.optionalString (guest.domain.metadata != "") "${guest.domain.metadata}")
+ ''
<os>
<type>hvm</type>
</os>
<memory unit="GiB">${toString guest.domain.memory}</memory>
<devices>
<disk type="volume">
<source volume="guest-${name}"/>
<target dev="vda" bus="virtio"/>
</disk>
<graphics type="spice" autoport="yes"/>
<input type="keyboard" bus="usb"/>
</devices>
<features>
<acpi/>
</features>
</domain>
'';
in
''
uuid="$(${pkgs.libvirt}/bin/virsh domuuid '${name}' || true)"
${pkgs.libvirt}/bin/virsh define <(sed "s/UUID/$uuid/" '${xml}')
${pkgs.libvirt}/bin/virsh start '${name}'
'';
preStop = ''
${pkgs.libvirt}/bin/virsh shutdown '${name}'
let "timeout = $(date +%s) + 10"
while [ "$(${pkgs.libvirt}/bin/virsh list --name | grep --count '^${name}$')" -gt 0 ]; do
if [ "$(date +%s)" -ge "$timeout" ]; then
# Meh, we warned it...
${pkgs.libvirt}/bin/virsh destroy '${name}'
else
# The machine is still running, let's give it some time to shut down
sleep 0.5
fi
done
'';
}
) config.services.emile.libvirtnix.instances;
};
}
|
