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7fee11a29c
virt-manager/virtinst/osdict.py
Fabiano Fidêncio 7fee11a29c osdict: Add _OsTree() class 
Similarly to the _OsMedia() class, let's create a _OsTree() class which,
at least for now, has only one method that returns the OsinfoTree
object.

Although this class & method are not extrictly needed, having them makes
the code more consistent.

Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>
2019-07-16 16:54:29 -04:00

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#
# List of OS Specific data
#
# Copyright 2006-2008, 2013-2014 Red Hat, Inc.
#
# This work is licensed under the GNU GPLv2 or later.
# See the COPYING file in the top-level directory.
import datetime
import os
import re
from gi.repository import Libosinfo
from .logger import log
def _in_testsuite():
return "VIRTINST_TEST_SUITE" in os.environ
###################
# Sorting helpers #
###################
def _sortby(osobj):
"""
Combines distro+version to make a more sort friendly string. Examples
fedora25 -> fedora-0025000000000000
ubuntu17.04 -> ubuntu-0017000400000000
win2k8r2 -> win-0006000100000000
"""
if osobj.is_generic():
# Sort generic at the end of the list
return "zzzzzz-000000000000"
version = osobj.version
try:
t = version.split(".")
t = t[:min(4, len(t))] + [0] * (4 - min(4, len(t)))
new_version = ""
for n in t:
new_version = new_version + ("%.4i" % int(n))
version = new_version
except Exception:
pass
return "%s-%s" % (osobj.distro, version)
def _sort(tosort):
sortby_mappings = {}
distro_mappings = {}
retlist = []
for key, osinfo in tosort.items():
# Libosinfo has some duplicate version numbers here, so append .1
# if there's a collision
sortby = _sortby(osinfo)
while sortby_mappings.get(sortby):
sortby = sortby + ".1"
sortby_mappings[sortby] = key
# Group by distro first, so debian is clumped together, fedora, etc.
distro = osinfo.distro
if osinfo.is_generic():
distro = "zzzzzz"
if distro not in distro_mappings:
distro_mappings[distro] = []
distro_mappings[distro].append(sortby)
# We want returned lists to be sorted descending by 'distro', so we get
# debian5, debian4, fedora14, fedora13
# rather than
# debian4, debian5, fedora13, fedora14
for distro_list in list(distro_mappings.values()):
distro_list.sort()
distro_list.reverse()
sorted_distro_list = list(distro_mappings.keys())
sorted_distro_list.sort()
# Build the final list of sorted os objects
for distro in sorted_distro_list:
distro_list = distro_mappings[distro]
for key in distro_list:
orig_key = sortby_mappings[key]
retlist.append(tosort[orig_key])
return retlist
class _OsinfoIter:
"""
Helper to turn osinfo style get_length/get_nth lists into python
iterables
"""
def __init__(self, listobj):
self.current = 0
self.listobj = listobj
self.high = -1
if self.listobj:
self.high = self.listobj.get_length() - 1
def __iter__(self):
return self
def __next__(self):
if self.current > self.high:
raise StopIteration
ret = self.listobj.get_nth(self.current)
self.current += 1
return ret
class _OSDB(object):
"""
Entry point for the public API
"""
def __init__(self):
self.__os_loader = None
self.__all_variants = None
# This is only for back compatibility with pre-libosinfo support.
# This should never change.
_aliases = {
"altlinux": "altlinux1.0",
"debianetch": "debian4",
"debianlenny": "debian5",
"debiansqueeze": "debian6",
"debianwheezy": "debian7",
"freebsd10": "freebsd10.0",
"freebsd6": "freebsd6.0",
"freebsd7": "freebsd7.0",
"freebsd8": "freebsd8.0",
"freebsd9": "freebsd9.0",
"mandriva2009": "mandriva2009.0",
"mandriva2010": "mandriva2010.0",
"mbs1": "mbs1.0",
"msdos": "msdos6.22",
"openbsd4": "openbsd4.2",
"opensolaris": "opensolaris2009.06",
"opensuse11": "opensuse11.4",
"opensuse12": "opensuse12.3",
"rhel4": "rhel4.0",
"rhel5": "rhel5.0",
"rhel6": "rhel6.0",
"rhel7": "rhel7.0",
"ubuntuhardy": "ubuntu8.04",
"ubuntuintrepid": "ubuntu8.10",
"ubuntujaunty": "ubuntu9.04",
"ubuntukarmic": "ubuntu9.10",
"ubuntulucid": "ubuntu10.04",
"ubuntumaverick": "ubuntu10.10",
"ubuntunatty": "ubuntu11.04",
"ubuntuoneiric": "ubuntu11.10",
"ubuntuprecise": "ubuntu12.04",
"ubuntuquantal": "ubuntu12.10",
"ubunturaring": "ubuntu13.04",
"ubuntusaucy": "ubuntu13.10",
"virtio26": "fedora10",
"vista": "winvista",
"winxp64": "winxp",
# Old --os-type values
"linux": "generic",
"windows": "winxp",
"solaris": "solaris10",
"unix": "freebsd9.0",
"other": "generic",
}
#################
# Internal APIs #
#################
def _make_default_variants(self):
ret = {}
# Generic variant
v = _OsVariant(None)
ret[v.name] = v
return ret
@property
def _os_loader(self):
if not self.__os_loader:
loader = Libosinfo.Loader()
loader.process_default_path()
self.__os_loader = loader
return self.__os_loader
@property
def _all_variants(self):
if not self.__all_variants:
loader = self._os_loader
allvariants = self._make_default_variants()
db = loader.get_db()
oslist = db.get_os_list()
for o in _OsinfoIter(oslist):
osi = _OsVariant(o)
allvariants[osi.name] = osi
self.__all_variants = allvariants
return self.__all_variants
###############
# Public APIs #
###############
def lookup_os_by_full_id(self, full_id, raise_error=False):
for osobj in self._all_variants.values():
if osobj.full_id == full_id:
return osobj
if raise_error:
raise ValueError(_("Unknown libosinfo ID '%s'") % full_id)
def lookup_os(self, key, raise_error=False):
if key in self._aliases:
alias = self._aliases[key]
# Added 2018-10-02. Maybe remove aliases in a year
log.warning(
_("OS name '%s' is deprecated, using '%s' instead. "
"This alias will be removed in the future."), key, alias)
key = alias
ret = self._all_variants.get(key)
if ret is None and raise_error:
raise ValueError(_("Unknown OS name '%s'. "
"See `osinfo-query os` for valid values.") % key)
return ret
def guess_os_by_iso(self, location):
try:
media = Libosinfo.Media.create_from_location(location, None)
except Exception as e:
log.debug("Error creating libosinfo media object: %s", str(e))
return None
if not self._os_loader.get_db().identify_media(media):
return None # pragma: no cover
return media.get_os().get_short_id(), _OsMedia(media)
def guess_os_by_tree(self, location):
if location.startswith("/"):
location = "file://" + location
if _in_testsuite() and not location.startswith("file:"):
# We have mock network tests, but we don't want to pass the
# fake URL to libosinfo because it slows down the testcase
return None
try:
tree = Libosinfo.Tree.create_from_location(location, None)
except Exception as e:
log.debug("Error creating libosinfo tree object for "
"location=%s : %s", location, str(e))
return None
osobj, treeobj = self._os_loader.get_db().guess_os_from_tree(tree)
if not osobj:
return None # pragma: no cover
return osobj.get_short_id(), treeobj
def list_os(self):
"""
List all OSes in the DB
"""
sortmap = {}
for name, osobj in self._all_variants.items():
sortmap[name] = osobj
return _sort(sortmap)
OSDB = _OSDB()
#####################
# OsResources class #
#####################
class _OsResources:
def __init__(self, minimum, recommended):
self._minimum = self._convert_to_dict(minimum)
self._recommended = self._convert_to_dict(recommended)
def _convert_to_dict(self, resources):
"""
Convert an OsResources object to a dictionary for easier
lookups. Layout is: {arch: {strkey: value}}
"""
ret = {}
for r in _OsinfoIter(resources):
vals = {}
vals["ram"] = r.get_ram()
vals["n-cpus"] = r.get_n_cpus()
vals["storage"] = r.get_storage()
ret[r.get_architecture()] = vals
return ret
def _get_key(self, resources, key, arch):
for checkarch in [arch, "all"]:
if checkarch in resources and key in resources[checkarch]:
return resources[checkarch][key]
def _get_minimum_key(self, key, arch):
val = self._get_key(self._minimum, key, arch)
if val and val > 0:
return val
def _get_recommended_key(self, key, arch):
val = self._get_key(self._recommended, key, arch)
if val and val > 0:
return val
# If we are looking for a recommended value, but the OS
# DB only has minimum resources tracked, double the minimum
# value as an approximation at a 'recommended' value
val = self._get_minimum_key(key, arch)
if val:
log.debug("No recommended value found for key='%s', "
"using minimum=%s * 2", key, val)
return val * 2
return None
def get_minimum_ram(self, arch):
return self._get_minimum_key("ram", arch)
def get_recommended_ram(self, arch):
return self._get_recommended_key("ram", arch)
def get_recommended_ncpus(self, arch):
return self._get_recommended_key("n-cpus", arch)
def get_recommended_storage(self, arch):
return self._get_recommended_key("storage", arch)
#####################
# OsVariant classes #
#####################
class _OsVariant(object):
def __init__(self, o):
self._os = o
self._family = self._os and self._os.get_family() or None
self.full_id = self._os and self._os.get_id() or None
self.name = self._os and self._os.get_short_id() or "generic"
self.label = self._os and self._os.get_name() or "Generic default"
self.codename = self._os and self._os.get_codename() or ""
self.distro = self._os and self._os.get_distro() or ""
self.version = self._os and self._os.get_version() or None
self.eol = self._get_eol()
def __repr__(self):
return "<%s name=%s>" % (self.__class__.__name__, self.name)
########################
# Internal helper APIs #
########################
def _is_related_to(self, related_os_list, osobj=None,
check_derives=True, check_upgrades=True, check_clones=True):
osobj = osobj or self._os
if not osobj:
return False
if osobj.get_short_id() in related_os_list:
return True
check_list = []
def _extend(newl):
for obj in newl:
if obj not in check_list:
check_list.append(obj)
if check_derives:
_extend(osobj.get_related(
Libosinfo.ProductRelationship.DERIVES_FROM).get_elements())
if check_clones:
_extend(osobj.get_related(
Libosinfo.ProductRelationship.CLONES).get_elements())
if check_upgrades:
_extend(osobj.get_related(
Libosinfo.ProductRelationship.UPGRADES).get_elements())
for checkobj in check_list:
if (checkobj.get_short_id() in related_os_list or
self._is_related_to(related_os_list, osobj=checkobj,
check_upgrades=check_upgrades,
check_derives=check_derives,
check_clones=check_clones)):
return True
return False
def _get_all_devices(self):
if not self._os:
return []
return list(_OsinfoIter(self._os.get_all_devices()))
def _device_filter(self, devids=None, cls=None):
ret = []
devids = devids or []
for dev in self._get_all_devices():
if devids and dev.get_id() not in devids:
continue
if cls and not re.match(cls, dev.get_class()):
continue
ret.append(dev.get_name())
return ret
###############
# Cached APIs #
###############
def _get_eol(self):
eol = self._os and self._os.get_eol_date() or None
rel = self._os and self._os.get_release_date() or None
# We can use os.get_release_status() & osinfo.ReleaseStatus.ROLLING
# if we require libosinfo >= 1.4.0.
release_status = self._os and self._os.get_param_value(
Libosinfo.OS_PROP_RELEASE_STATUS) or None
def _glib_to_datetime(glibdate):
date = "%s-%s" % (glibdate.get_year(), glibdate.get_day_of_year())
return datetime.datetime.strptime(date, "%Y-%j")
now = datetime.datetime.today()
if eol is not None:
return now > _glib_to_datetime(eol)
# Rolling distributions are never EOL.
if release_status == "rolling":
return False
# If no EOL is present, assume EOL if release was > 5 years ago
if rel is not None:
rel5 = _glib_to_datetime(rel) + datetime.timedelta(days=365 * 5)
return now > rel5
return False
###############
# Public APIs #
###############
def get_handle(self):
return self._os
def is_generic(self):
return self._os is None
def is_windows(self):
return self._family in ['win9x', 'winnt', 'win16']
def broken_uefi_with_hyperv(self):
# Some windows versions are broken with hyperv enlightenments + UEFI
# https://bugzilla.redhat.com/show_bug.cgi?id=1185253
# https://bugs.launchpad.net/qemu/+bug/1593605
return self.name in ("win2k8r2", "win7")
def get_clock(self):
if self.is_windows() or self._family in ['solaris']:
return "localtime"
return "utc"
def supported_netmodels(self):
return self._device_filter(cls="net")
def supports_usbtablet(self):
# If no OS specified, still default to tablet
if not self._os:
return True
devids = ["http://usb.org/usb/80ee/0021"]
return bool(self._device_filter(devids=devids))
def supports_virtiodisk(self):
# virtio-block and virtio1.0-block
devids = ["http://pcisig.com/pci/1af4/1001",
"http://pcisig.com/pci/1af4/1042"]
return bool(self._device_filter(devids=devids))
def supports_virtioscsi(self):
# virtio-scsi and virtio1.0-scsi
devids = ["http://pcisig.com/pci/1af4/1004",
"http://pcisig.com/pci/1af4/1048"]
return bool(self._device_filter(devids=devids))
def supports_virtionet(self):
# virtio-net and virtio1.0-net
devids = ["http://pcisig.com/pci/1af4/1000",
"http://pcisig.com/pci/1af4/1041"]
return bool(self._device_filter(devids=devids))
def supports_virtiorng(self):
# virtio-rng and virtio1.0-rng
devids = ["http://pcisig.com/pci/1af4/1005",
"http://pcisig.com/pci/1af4/1044"]
return bool(self._device_filter(devids=devids))
def supports_virtioballoon(self):
# virtio-balloon and virtio1.0-balloon
devids = ["http://pcisig.com/pci/1af4/1002",
"http://pcisig.com/pci/1af4/1045"]
return bool(self._device_filter(devids=devids))
def supports_virtioserial(self):
devids = ["http://pcisig.com/pci/1af4/1003",
"http://pcisig.com/pci/1af4/1043"]
if self._device_filter(devids=devids):
return True
# osinfo data was wrong for RHEL/centos here until Oct 2018
# Remove this hack after 6 months or so
return self._is_related_to("rhel6.0")
def supports_virtioinput(self):
# virtio1.0-input
devids = ["http://pcisig.com/pci/1af4/1052"]
return bool(self._device_filter(devids=devids))
def supports_usb3(self):
# qemu-xhci
devids = ["http://pcisig.com/pci/1b36/0004"]
return bool(self._device_filter(devids=devids))
def supports_virtio1(self):
# Use virtio1.0-net device as a proxy for virtio1.0 as a whole
devids = ["http://pcisig.com/pci/1af4/1041"]
return bool(self._device_filter(devids=devids))
def supports_chipset_q35(self):
# For our purposes, check for the union of q35 + virtio1.0 support
if self.supports_virtionet() and not self.supports_virtio1():
return False
devids = ["http://qemu.org/chipset/x86/q35"]
return bool(self._device_filter(devids=devids))
def get_recommended_resources(self):
minimum = self._os and self._os.get_minimum_resources() or None
recommended = self._os and self._os.get_recommended_resources() or None
return _OsResources(minimum, recommended)
def get_network_install_required_ram(self, guest):
if hasattr(self._os, "get_network_install_resources"):
resources = self._os.get_network_install_resources()
for r in _OsinfoIter(resources):
arch = r.get_architecture()
if arch == guest.os.arch or arch == "all":
return r.get_ram()
def get_kernel_url_arg(self):
"""
Kernel argument name the distro's installer uses to reference
a network source, possibly bypassing some installer prompts
"""
if not self._os:
return None
# SUSE distros
if self.distro in ["caasp", "sle", "sled", "sles", "opensuse"]:
return "install"
if self.distro not in ["centos", "rhel", "fedora"]:
return None
# Red Hat distros
try:
if re.match(r"[0-9]+-unknown", self.version):
version = float(self.version.split("-")[0])
else:
version = float(self.version)
except Exception:
# Can hit this for -rawhide or -unknown
version = 999
if self.distro in ["centos", "rhel"] and version < 7:
return "method"
if self.distro in ["fedora"] and version < 19:
return "method"
return "inst.repo"
def get_location(self, arch):
treelist = []
if self._os:
treelist = list(_OsinfoIter(self._os.get_tree_list()))
if not treelist:
raise RuntimeError(
_("OS '%s' does not have a URL location") % self.name)
# Some distros have more than one URL for a specific architecture,
# which is the case for Fedora and different variants (Server,
# Workstation). Later on, we'll have to differentiate that and return
# the right one.
for tree in treelist:
if tree.get_architecture() == arch:
return tree.get_url()
raise RuntimeError(
_("OS '%s' does not have a URL location for the %s architecture") %
(self.name, arch))
def get_install_script_list(self):
if not self._os:
return [] # pragma: no cover
return list(_OsinfoIter(self._os.get_install_script_list()))
class _OsMedia(object):
def __init__(self, osinfo_media):
self._media = osinfo_media
def get_kernel_path(self):
return self._media.get_kernel_path()
def get_initrd_path(self):
return self._media.get_initrd_path()
def supports_installer_script(self):
return self._media.supports_installer_script()
def is_netinst(self):
variants = list(_OsinfoIter(self._media.get_os_variants()))
for variant in variants:
if "netinst" in variant.get_id():
return True
return False
def get_install_script_list(self):
return list(_OsinfoIter(self._media.get_install_script_list()))
def get_osinfo_media(self):
return self._media
class _OsTree(object):
def __init__(self, osinfo_tree):
self._tree = osinfo_tree
def get_osinfo_tree(self):
return self._tree
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