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NixOS VM tests: Use 9p instead of CIFS

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This commit is contained in:
Eelco Dolstra 2013-07-05 17:24:49 +02:00
parent edab9e4976
commit c8fca8c8fc
2 changed files with 23 additions and 63 deletions
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2
modules/profiles/qemu-guest.nix
View File

@ -4,6 +4,6 @@
{ config, pkgs, ... }:
{
boot.initrd.availableKernelModules = [ "virtio_net" "virtio_pci" "virtio_blk" ];
boot.initrd.availableKernelModules = [ "virtio_net" "virtio_pci" "virtio_blk" "9p" "9pnet_virtio" ];
boot.kernelModules = [ "virtio_balloon" "virtio_console" ];
}

84
modules/virtualisation/qemu-vm.nix
View File

@ -162,23 +162,13 @@ let
${toString config.virtualisation.diskSize}M || exit 1
fi
# Start Samba (which wants to put its socket and config files in TMPDIR).
# Create a directory for exchanging data with the VM.
if [ -z "$TMPDIR" -o -z "$USE_TMPDIR" ]; then
TMPDIR=$(mktemp -d nix-vm-smbd.XXXXXXXXXX --tmpdir)
TMPDIR=$(mktemp -d nix-vm.XXXXXXXXXX --tmpdir)
fi
cd $TMPDIR
mkdir -p $TMPDIR/xchg
EXTRA_SAMBA_CONF="
[shared]
force user = $WHO
path = ''${SHARED_DIR:-$TMPDIR/xchg}
read only = no
guest ok = yes
"
${pkgs.vmTools.startSamba}
idx=2
extraDisks=""
${flip concatMapStrings cfg.emptyDiskImages (size: ''
@ -189,13 +179,16 @@ let
# Start QEMU.
# "-boot menu=on" is there, because I don't know how to make qemu boot from 2nd hd.
exec ${pkgs.qemu_kvm}/bin/qemu-kvm \
exec ${pkgs.qemu}/bin/qemu-system-${if pkgs.stdenv.system == "x86_64-linux" then "x86_64" else "i386"} \
-enable-kvm \
-name ${vmName} \
-m ${toString config.virtualisation.memorySize} \
${optionalString (pkgs.stdenv.system == "x86_64-linux") "-cpu kvm64"} \
-net nic,vlan=0,model=virtio \
-chardev socket,id=samba,path=./samba \
-net user,vlan=0,guestfwd=tcp:10.0.2.4:445-chardev:samba''${QEMU_NET_OPTS:+,$QEMU_NET_OPTS} \
-net user,vlan=0''${QEMU_NET_OPTS:+,$QEMU_NET_OPTS} \
-virtfs local,path=/nix/store,security_model=none,mount_tag=store \
-virtfs local,path=$TMPDIR/xchg,security_model=none,mount_tag=xchg \
-virtfs local,path=''${SHARED_DIR:-$TMPDIR/xchg},security_model=none,mount_tag=shared \
${if cfg.useBootLoader then ''
-drive index=0,id=drive1,file=$NIX_DISK_IMAGE,if=virtio,cache=writeback,werror=report \
-drive index=1,id=drive2,file=${bootDisk}/disk.img,if=virtio,readonly \
@ -271,12 +264,6 @@ in
boot.loader.grub.device = mkOverride 50 "/dev/vda";
# All the modules the initrd needs to mount the host filesystem via
# CIFS. Also use paravirtualised network and block devices for
# performance.
boot.initrd.availableKernelModules =
[ "cifs" "nls_utf8" "hmac" "md4" "ecb" "des_generic" "sha256" ];
boot.initrd.supportedFilesystems = optional cfg.writableStore "unionfs-fuse";
boot.initrd.extraUtilsCommands =
@ -287,10 +274,6 @@ in
boot.initrd.postDeviceCommands =
''
# Set up networking. Needed for CIFS mounting.
ip link set eth0 up
ip addr add 10.0.2.15/24 dev eth0
# If the disk image appears to be empty, run mke2fs to
# initialise.
FSTYPE=$(blkid -o value -s TYPE /dev/vda || true)
@ -338,30 +321,29 @@ in
virtualisation.qemu.options = [ "-vga std" "-usbdevice tablet" ];
# Mount the host filesystem via CIFS, and bind-mount the Nix store
# of the host into our own filesystem. We use mkOverride to allow
# this module to be applied to "normal" NixOS system configuration,
# where the regular value for the `fileSystems' attribute should be
# Mount the host filesystem via 9P, and bind-mount the Nix store of
# the host into our own filesystem. We use mkOverride to allow this
# module to be applied to "normal" NixOS system configuration, where
# the regular value for the `fileSystems' attribute should be
# disregarded for the purpose of building a VM test image (since
# those filesystems don't exist in the VM).
fileSystems = mkOverride 10
(let mode = if builtins.compareVersions "3.5" config.boot.kernelPackages.kernel.version == 1 then "none" else "ntlm"; in
{ "/".device = "/dev/vda";
"/nix/store" =
{ device = "//10.0.2.4/store";
fsType = "cifs";
options = "guest,sec=${mode},noperm,noacl";
{ device = "store";
fsType = "9p";
options = "trans=virtio,version=9p2000.L,msize=1048576,cache=loose";
};
"/tmp/xchg" =
{ device = "//10.0.2.4/xchg";
fsType = "cifs";
options = "guest,sec=${mode},noperm,noacl";
{ device = "xchg";
fsType = "9p";
options = "trans=virtio,version=9p2000.L,msize=1048576,cache=loose";
neededForBoot = true;
};
"/tmp/shared" =
{ device = "//10.0.2.4/shared";
fsType = "cifs";
options = "guest,sec=${mode},noperm,noacl";
{ device = "shared";
fsType = "9p";
options = "trans=virtio,version=9p2000.L,msize=1048576";
neededForBoot = true;
};
} // optionalAttrs cfg.useBootLoader
@ -371,24 +353,10 @@ in
options = "ro";
noCheck = true; # fsck fails on a r/o filesystem
};
});
};
swapDevices = mkOverride 50 [ ];
# Starting DHCP brings down eth0, which kills the connection to the
# host filesystem and thus deadlocks the system.
networking.useDHCP = false;
networking.defaultGateway = mkOverride 200 "10.0.2.2";
networking.nameservers = [ "10.0.2.3" ];
networking.interfaces = singleton
{ name = "eth0";
ipAddress = "10.0.2.15";
prefixLength = 24;
};
# Don't run ntpd in the guest. It should get the correct time from KVM.
services.ntp.enable = false;
@ -399,13 +367,6 @@ in
ln -s ${pkgs.writeScript "run-nixos-vm" startVM} $out/bin/run-${vmName}-vm
'';
# sendfile() is currently broken over CIFS, so fix it here for all
# configurations that use Apache.
services.httpd.extraConfig =
''
EnableSendFile Off
'';
# When building a regular system configuration, override whatever
# video driver the host uses.
services.xserver.videoDriver = mkOverride 50 null;
@ -427,7 +388,6 @@ in
(isEnabled "VIRTIO_PCI")
(isEnabled "VIRTIO_NET")
(isEnabled "EXT4_FS")
(isEnabled "CIFS")
(isYes "BLK_DEV")
(isYes "PCI")
(isYes "EXPERIMENTAL")