Commit a16f0d77 authored by Dimitris Aragiorgis's avatar Dimitris Aragiorgis Committed by Thomas Thrainer
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Prepare kvm options to support -device for disks

Newer kvm version support -device driver,... option where available
drivers can be found by running kvm -device ? command. Currently
ganeti uses `if` property of driver to define the disk type to use
which is also passed as hvparam. This patch prepares the use of
-device option only for paravirtual disks. To support other drivers
as well we must create a mapping between the values passed now as
disk_type hvparam and existing drivers. Note that if -device is used
`if` property of `drive` option should be `none`.
Signed-off-by: default avatarDimitris Aragiorgis <>
Signed-off-by: default avatarThomas Thrainer <>
Reviewed-by: default avatarThomas Thrainer <>
parent 66d3d195
......@@ -546,6 +546,7 @@ class KVMHypervisor(hv_base.BaseHypervisor):
_VIRTIO = "virtio"
_VIRTIO_NET_PCI = "virtio-net-pci"
_VIRTIO_BLK_PCI = "virtio-blk-pci"
_MIGRATION_STATUS_RE = re.compile(r"Migration\s+status:\s+(\w+)",
re.M | re.I)
......@@ -575,7 +576,8 @@ class KVMHypervisor(hv_base.BaseHypervisor):
_NETDEV_RE = re.compile(r"^-netdev\s", re.M)
_DISPLAY_RE = re.compile(r"^-display\s", re.M)
_MACHINE_RE = re.compile(r"^-machine\s", re.M)
_NEW_VIRTIO_RE = re.compile(r"^name \"%s\"" % _VIRTIO_NET_PCI, re.M)
_VIRTIO_NET_RE = re.compile(r"^name \"%s\"" % _VIRTIO_NET_PCI, re.M)
_VIRTIO_BLK_RE = re.compile(r"^name \"%s\"" % _VIRTIO_BLK_PCI, re.M)
# match -drive.*boot=on|off on different lines, but in between accept only
# dashes not preceeded by a new line (which would mean another option
# different than -drive is starting)
......@@ -1038,15 +1040,26 @@ class KVMHypervisor(hv_base.BaseHypervisor):
hvp = instance.hvparams
boot_disk = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_DISK
kvm_path = hvp[constants.HV_KVM_PATH]
# whether this is an older KVM version that uses the boot=on flag
# on devices
needs_boot_flag =
dev_opts = []
device_driver = None
disk_type = hvp[constants.HV_DISK_TYPE]
if disk_type == constants.HT_DISK_PARAVIRTUAL:
if_val = ",if=%s" % self._VIRTIO
devlist = self._GetKVMOutput(kvm_path, self._KVMOPT_DEVICELIST)
# TODO: uncomment when -device is used
# if_val = ",if=none"
# will be passed in -device option as driver
device_driver = self._VIRTIO_BLK_PCI
except errors.HypervisorError, _:
if_val = ",if=%s" % disk_type
# Cache mode
......@@ -1084,6 +1097,8 @@ class KVMHypervisor(hv_base.BaseHypervisor):
drive_val = "file=%s,format=raw%s%s%s" % \
(drive_uri, if_val, boot_val, cache_val)
if device_driver:
dev_opts.extend(["-drive", drive_val])
return dev_opts
......@@ -1569,7 +1584,7 @@ class KVMHypervisor(hv_base.BaseHypervisor):
nic_model = self._VIRTIO
devlist = self._GetKVMOutput(kvm_path, self._KVMOPT_DEVICELIST)
nic_model = self._VIRTIO_NET_PCI
vnet_hdr = up_hvp[constants.HV_VNET_HDR]
except errors.HypervisorError, _:
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