Use virtio disk driver from NixOS/nixops#9

nix-community · Jul 2, 2020 · 5084482 · 5084482
1 parent 92401ed
commit 5084482
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Showing 2 changed files with 8 additions and 2 deletions.
diff --git a/nix/libvirtd.nix b/nix/libvirtd.nix
@@ -176,6 +176,12 @@ in
     boot.loader.grub.device = "/dev/sda";
     boot.loader.timeout = 0;
 
+    imports =
+      [ <nixpkgs/nixos/modules/profiles/qemu-guest.nix>
+      ];
+    boot.initrd.availableKernelModules = [ "virtio_pci" "virtio_blk" "virtio_net" ];
+    boot.kernelModules = [ "kvm-intel" ];
+
     services.openssh.enable = true;
     services.openssh.startWhenNeeded = false;
     services.openssh.extraConfig = "UseDNS no";

diff --git a/nixopsvirtd/backends/libvirtd.py b/nixopsvirtd/backends/libvirtd.py
@@ -296,9 +296,9 @@ def _make_os(defn):
             '  <devices>',
             '    <emulator>{2}</emulator>',
             '    <disk type="file" device="disk">',
-            '      <driver name="qemu" type="qcow2"/>',
+            '      <driver name="qemu" type="qcow2" cache="none" io="native"/>',
             '      <source file="{3}"/>',
-            '      <target dev="hda"/>',
+            '      <target dev="hda" bus="virtio"/>',
             '    </disk>',
             '\n'.join([self._make_iface(n) for n in defn.networks]),
             '    <graphics type="vnc" port="-1" autoport="yes"/>' if not defn.headless else "",