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virt-manager/virtconv/ovf.py

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#
# Copyright 2009, 2013 Red Hat, Inc.
# Cole Robinson <crobinso@redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301 USA.
#
import logging
import os
import libxml2
import virtinst
from .formats import parser_class
# Mapping of ResourceType value to device type
# http://konkretcmpi.org/cim218/CIM_ResourceAllocationSettingData.html
#
# "Other" [1]
# "Computer System" [2]
# "Processor" [3]
# "Memory" [4]
# "IDE Controller" [5]
# "Parallel SCSI HBA" [6]
# "FC HBA" [7]
# "iSCSI HBA" [8]
# "IB HCA" [9]
# "Ethernet Adapter" [10]
# "Other Network Adapter" [11]
# "I/O Slot" [12]
# "I/O Device" [13]
# "Floppy Drive" [14]
# "CD Drive" [15]
# "DVD drive" [16]
# "Disk Drive" [17]
# "Tape Drive" [18]
# "Storage Extent" [19]
# "Other storage device" [20]
# "Serial port" [21]
# "Parallel port" [22]
# "USB Controller" [23]
# "Graphics controller" [24]
# "IEEE 1394 Controller" [25]
# "Partitionable Unit" [26]
# "Base Partitionable Unit" [27]
# "Power" [28]
# "Cooling Capacity" [29]
# "Ethernet Switch Port" [30]
DEVICE_CPU = "3"
DEVICE_MEMORY = "4"
DEVICE_IDE_BUS = "5"
DEVICE_SCSI_BUS = "6"
DEVICE_ETHERNET = "10"
DEVICE_DISK = "17"
DEVICE_GRAPHICS = "24"
# AllocationUnits mapping can be found in Appendix C here:
# http://www.dmtf.org/standards/documents/CIM/DSP0004.pdf
def _ovf_register_namespace(ctx):
ctx.xpathRegisterNs("ovf", "http://schemas.dmtf.org/ovf/envelope/1")
ctx.xpathRegisterNs("ovfenv", "http://schemas.dmtf.org/ovf/environment/1")
ctx.xpathRegisterNs("rasd", "http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_ResourceAllocationSettingData")
ctx.xpathRegisterNs("vssd", "http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_VirtualSystemSettingData")
ctx.xpathRegisterNs("vmw", "http://www.vmware.com/schema/ovf")
ctx.xpathRegisterNs("xsi", "http://www.w3.org/2001/XMLSchema-instance")
def node_list(node):
child_list = []
child = node.children
while child:
child_list.append(child)
child = child.next
return child_list
def _get_child_content(parent_node, child_name):
for node in node_list(parent_node):
if node.name == child_name:
return node.content
return None
def _xml_parse_wrapper(xml, parse_func, *args, **kwargs):
"""
Parse the passed xml string into an xpath context, which is passed
to parse_func, along with any extra arguments.
"""
doc = None
ctx = None
ret = None
try:
doc = libxml2.parseDoc(xml)
ctx = doc.xpathNewContext()
_ovf_register_namespace(ctx)
ret = parse_func(doc, ctx, *args, **kwargs)
finally:
if ctx is not None:
ctx.xpathFreeContext()
if doc is not None:
doc.freeDoc()
return ret
def _convert_alloc_val(ignore, val):
# This is a hack, but should we really have to decode
# allocation units = "bytes * 2^20"?
val = float(val)
if val > 100000000:
# Assume bytes
return int(round(val / 1024.0 / 1024.0))
elif val > 100000:
# Assume kilobytes
return int(round(val / 1024.0))
elif val < 32:
# Assume GiB
return int(val * 1024)
return int(val)
def _import_file(doc, ctx, conn, input_file):
ignore = doc
def xpath_str(path):
ret = ctx.xpathEval(path)
result = None
if ret is not None:
if type(ret) == list:
if len(ret) >= 1:
result = ret[0].content
else:
result = ret
return result
def bool_val(val):
if str(val).lower() == "false":
return False
elif str(val).lower() == "true":
return True
return False
def xpath_nodechildren(path):
# Return the children of the first node found by the xpath
nodes = ctx.xpathEval(path)
if not nodes:
return []
return node_list(nodes[0])
def _lookup_disk_path(path):
fmt = "vmdk"
ref = None
def _path_has_prefix(prefix):
if path.startswith(prefix):
return path[len(prefix):]
if path.startswith("ovf:" + prefix):
return path[len("ovf:" + prefix):]
return False
if _path_has_prefix("/disk/"):
disk_ref = _path_has_prefix("/disk/")
xpath = (_make_section_xpath(envbase, "DiskSection") +
"/ovf:Disk[@ovf:diskId='%s']" % disk_ref)
if not ctx.xpathEval(xpath):
raise ValueError(_("Unknown disk reference id '%s' "
"for path %s.") % (path, disk_ref))
ref = xpath_str(xpath + "/@ovf:fileRef")
elif _path_has_prefix("/file/"):
ref = _path_has_prefix("/file/")
else:
raise ValueError(_("Unknown storage path type %s.") % path)
xpath = (envbase + "/ovf:References/ovf:File[@ovf:id='%s']" % ref)
if not ctx.xpathEval(xpath):
raise ValueError(_("Unknown reference id '%s' "
"for path %s.") % (ref, path))
return xpath_str(xpath + "/@ovf:href"), fmt
is_ovirt_format = False
envbase = "/ovf:Envelope[1]"
vsbase = envbase + "/ovf:VirtualSystem"
if not ctx.xpathEval(vsbase):
vsbase = envbase + "/ovf:Content[@xsi:type='ovf:VirtualSystem_Type']"
is_ovirt_format = True
def _make_section_xpath(base, section_name):
if is_ovirt_format:
return (base +
"/ovf:Section[@xsi:type='ovf:%s_Type']" % section_name)
return base + "/ovf:%s" % section_name
osbase = _make_section_xpath(vsbase, "OperatingSystemSection")
vhstub = _make_section_xpath(vsbase, "VirtualHardwareSection")
if not ctx.xpathEval(vsbase):
raise RuntimeError("Did not find any VirtualSystem section")
if not ctx.xpathEval(vhstub):
raise RuntimeError("Did not find any VirtualHardwareSection")
vhbase = vhstub + "/ovf:Item[rasd:ResourceType='%s']"
# General info
name = xpath_str(vsbase + "/ovf:Name")
desc = xpath_str(vsbase + "/ovf:AnnotationSection/ovf:Annotation")
if not desc:
desc = xpath_str(vsbase + "/ovf:Description")
vcpus = xpath_str((vhbase % DEVICE_CPU) + "/rasd:VirtualQuantity")
sockets = xpath_str((vhbase % DEVICE_CPU) + "/rasd:num_of_sockets")
cores = xpath_str((vhbase % DEVICE_CPU) + "/rasd:num_of_cores")
mem = xpath_str((vhbase % DEVICE_MEMORY) + "/rasd:VirtualQuantity")
alloc_mem = xpath_str((vhbase % DEVICE_MEMORY) +
"/rasd:AllocationUnits")
os_id = xpath_str(osbase + "/@id")
os_version = xpath_str(osbase + "/@version")
# This is the VMWare OS name
os_vmware = xpath_str(osbase + "/@osType")
logging.debug("OS parsed as: id=%s version=%s vmware=%s",
os_id, os_version, os_vmware)
# Sections that we handle
# NetworkSection is ignored, since I don't have an example of
# a valid section in the wild.
parsed_sections = ["References", "DiskSection", "NetworkSection",
"VirtualSystem"]
# Check for unhandled 'required' sections
for env_node in xpath_nodechildren(envbase):
if env_node.name in parsed_sections:
continue
elif env_node.isText():
continue
logging.debug("Unhandled XML section '%s'",
env_node.name)
if not bool_val(env_node.prop("required")):
continue
raise StandardError(_("OVF section '%s' is listed as "
"required, but parser doesn't know "
"how to handle it.") %
env_node.name)
disk_buses = {}
for node in ctx.xpathEval(vhbase % DEVICE_IDE_BUS):
instance_id = _get_child_content(node, "InstanceID")
disk_buses[instance_id] = "ide"
for node in ctx.xpathEval(vhbase % DEVICE_SCSI_BUS):
instance_id = _get_child_content(node, "InstanceID")
disk_buses[instance_id] = "scsi"
ifaces = []
for node in ctx.xpathEval(vhbase % DEVICE_ETHERNET):
iface = virtinst.VirtualNetworkInterface(conn)
# XXX: Just ignore 'source' info and choose the default
net_model = _get_child_content(node, "ResourceSubType")
if net_model and not net_model.isdigit():
iface.model = net_model.lower()
iface.set_default_source()
ifaces.append(iface)
disks = []
for node in ctx.xpathEval(vhbase % DEVICE_DISK):
bus_id = _get_child_content(node, "Parent")
path = _get_child_content(node, "HostResource")
bus = disk_buses.get(bus_id, "ide")
fmt = "raw"
if path:
path, fmt = _lookup_disk_path(path)
disk = virtinst.VirtualDisk(conn)
disk.path = path
disk.driver_type = fmt
disk.bus = bus
disk.device = "disk"
disks.append(disk)
# XXX: Convert these OS values to something useful
ignore = os_version
ignore = os_id
ignore = os_vmware
guest = conn.caps.lookup_virtinst_guest()
guest.installer = virtinst.ImportInstaller(conn)
if not name:
name = os.path.basename(input_file)
guest.name = name.replace(" ", "_")
guest.description = desc or None
if vcpus:
guest.vcpus = int(vcpus)
elif sockets or cores:
if sockets:
guest.cpu.sockets = int(sockets)
if cores:
guest.cpu.cores = int(cores)
guest.cpu.vcpus_from_topology()
if mem:
guest.memory = _convert_alloc_val(alloc_mem, mem) * 1024
for dev in ifaces + disks:
guest.add_device(dev)
return guest
class ovf_parser(parser_class):
"""
Support for OVF appliance configurations.
Whitepaper: http://www.vmware.com/pdf/ovf_whitepaper_specification.pdf
Spec: http://www.dmtf.org/standards/published_documents/DSP0243_1.0.0.pdf
"""
name = "ovf"
suffix = ".ovf"
@staticmethod
def identify_file(input_file):
"""
Return True if the given file is of this format.
"""
if os.path.getsize(input_file) > (1024 * 1024 * 2):
return
infile = open(input_file, "r")
xml = infile.read()
infile.close()
def parse_cb(doc, ctx):
ignore = doc
return bool(ctx.xpathEval("/ovf:Envelope"))
try:
return _xml_parse_wrapper(xml, parse_cb)
except Exception, e:
logging.debug("Error parsing OVF XML: %s", str(e))
return False
@staticmethod
def export_libvirt(conn, input_file):
infile = open(input_file, "r")
xml = infile.read()
infile.close()
logging.debug("Importing OVF XML:\n%s", xml)
return _xml_parse_wrapper(xml, _import_file, conn, input_file)
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