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osinfo.py
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osinfo.py
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# SPDX-FileCopyrightText: Red Hat, Inc.
# SPDX-License-Identifier: GPL-2.0-or-later
from __future__ import absolute_import
import errno
import itertools
import glob
import linecache
import logging
import os
from collections import namedtuple
import six
from vdsm import utils
from vdsm.common import cache
from vdsm.common import commands
from vdsm.common import cpuarch
from vdsm.common import supervdsm
# For debian systems we can use python-apt if available
try:
import apt
python_apt = True
except ImportError:
python_apt = False
# For systems without rpm support
try:
import rpm
except ImportError:
pass
try:
from vdsm.gluster.api import GLUSTER_RPM_PACKAGES
from vdsm.gluster.api import GLUSTER_DEB_PACKAGES
glusterEnabled = True
except ImportError:
glusterEnabled = False
KernelFlags = namedtuple('KernelFlags', 'version, realtime')
NestedVirtualization = namedtuple('NestedVirtualization',
'enabled, kvm_module')
_FINDMNT = "findmnt"
class OSName:
UNKNOWN = 'unknown'
OVIRT = 'oVirt Node'
RHEL = 'RHEL'
FEDORA = 'Fedora'
RHEVH = 'RHEV Hypervisor'
DEBIAN = 'Debian'
class KdumpStatus(object):
UNKNOWN = -1
DISABLED = 0
ENABLED = 1
def kdump_status():
status = KdumpStatus.UNKNOWN
try:
# kdump status is written in kexec_crash_loaded
with open('/sys/kernel/kexec_crash_loaded', 'r') as f:
status = int(f.read().strip('\n'))
except EnvironmentError:
logging.info(
'Failed to open kexec_crash_loaded, status is unknown')
if status == KdumpStatus.ENABLED:
# check if fence_kdump is configured
status = KdumpStatus.DISABLED
try:
with open('/etc/kdump.conf', 'r') as f:
for line in f:
if line.startswith('fence_kdump_nodes'):
status = KdumpStatus.ENABLED
break
except EnvironmentError:
status = KdumpStatus.UNKNOWN
logging.exception(
'Cannot detect fence_kdump configuration, status is unknown'
)
return status
@cache.memoized
def _release_name():
if os.path.exists('/etc/rhev-hypervisor-release'):
return OSName.RHEVH
elif glob.glob('/etc/ovirt-node-*-release'):
return OSName.OVIRT
elif os.path.exists('/etc/fedora-release'):
return OSName.FEDORA
elif os.path.exists('/etc/redhat-release'):
return OSName.RHEL
elif os.path.exists('/etc/debian_version'):
return OSName.DEBIAN
else:
return OSName.UNKNOWN
def _parse_release_file(path):
data = {}
try:
with open(path) as f:
for line in f:
try:
key, value = [kv.strip() for kv in line.split('=', 1)]
except ValueError:
continue
data[key] = value
except IOError:
logging.exception('Fail to read release file')
return data
def _parse_node_version(path):
data = _parse_release_file(path)
return data.get('VERSION', ''), data.get('RELEASE', '')
def _next_gen_node():
"""
Return:
True if it's oVirt Node Next or RHV Node
"""
ts = rpm.TransactionSet()
for pkg in ts.dbMatch():
if (pkg['name'] == 'redhat-release-virtualization-host' or
pkg['name'] == 'ovirt-release-host-node'):
return True
return False
@cache.memoized
def _get_os_release_data(var_name):
"""
The /etc/os-release file contain operating
system identification data.
Param:
var_name is the variable name of /etc/os-release
Return:
return the value found or ""
"""
var_value = ''
_os_release_file = '/etc/os-release'
if os.path.exists(_os_release_file):
data = _parse_release_file(_os_release_file)
if data.get(var_name) is not None:
var_value = data.get(var_name).strip('"')
return var_value
def _get_pretty_name():
return _get_os_release_data('PRETTY_NAME')
def _get_version_id():
return _get_os_release_data('VERSION_ID')
@cache.memoized
def kernel_args(path='/proc/cmdline'):
with open(path, 'r') as f:
return f.readline().strip()
@cache.memoized
def kernel_args_dict(path='/proc/cmdline'):
cmdline = kernel_args().split(' ')
# This is poor and limited, but sufficient for key=value portion of
# cmdline.
ret = {}
for option in cmdline:
try:
key, value = option.split('=')
except ValueError:
continue
ret[key] = value
return ret
@cache.memoized
def version():
version = release_name = ''
osname = _release_name()
pretty_name = _get_pretty_name()
try:
if osname == OSName.RHEVH or osname == OSName.OVIRT:
version, release_name = _parse_node_version('/etc/default/version')
elif osname == OSName.DEBIAN:
version = linecache.getline('/etc/debian_version', 1).strip("\n")
release_name = "" # Debian just has a version entry
else:
release_path = '/etc/redhat-release'
ts = rpm.TransactionSet()
for er in ts.dbMatch('basenames', release_path):
if _next_gen_node():
version = _get_version_id()
release_name = er['release']
else:
version = er['version']
release_name = er['release']
except:
logging.error('failed to find version/release', exc_info=True)
return dict(release=release_name, version=version,
name=osname, pretty_name=pretty_name)
def selinux_status():
selinux = dict()
selinux['mode'] = str(utils.get_selinux_enforce_mode())
return selinux
def package_versions():
pkgs = {'kernel': runtime_kernel_flags().version}
if _release_name() in (OSName.RHEVH, OSName.OVIRT, OSName.FEDORA,
OSName.RHEL,):
KEY_PACKAGES = {
'glusterfs-cli': ('glusterfs-cli',),
'librbd1': ('librbd1',),
'libvirt': ('libvirt', 'libvirt-daemon-kvm'),
'mom': ('mom',),
'ovirt-hosted-engine-ha': ('ovirt-hosted-engine-ha',),
'openvswitch': ('openvswitch', 'ovirt-openvswitch'),
'nmstate': ('nmstate',),
'qemu-img': ('qemu-img', 'qemu-img-rhev', 'qemu-img-ev'),
'qemu-kvm': ('qemu-kvm', 'qemu-kvm-rhev', 'qemu-kvm-ev'),
'spice-server': ('spice-server',),
'vdsm': ('vdsm',),
'lvm2': ('lvm2', 'lvm2-libs'),
}
if glusterEnabled:
KEY_PACKAGES.update(GLUSTER_RPM_PACKAGES)
try:
ts = rpm.TransactionSet()
for pkg, names in six.iteritems(KEY_PACKAGES):
try:
mi = next(itertools.chain(
*[ts.dbMatch('name', name) for name in names]))
except StopIteration:
logging.debug("rpm package %s not found",
KEY_PACKAGES[pkg])
else:
pkgs[pkg] = {
'version': mi['version'],
'release': mi['release'],
}
except Exception:
logging.error('', exc_info=True)
elif _release_name() == OSName.DEBIAN and python_apt:
KEY_PACKAGES = {
'glusterfs-cli': 'glusterfs-cli',
'librbd1': 'librbd1',
'libvirt': 'libvirt0',
'mom': 'mom',
'qemu-img': 'qemu-utils',
'qemu-kvm': 'qemu-kvm',
'spice-server': 'libspice-server1',
'vdsm': 'vdsmd',
'lvm2': 'lvm2',
}
if glusterEnabled:
KEY_PACKAGES.update(GLUSTER_DEB_PACKAGES)
cache = apt.Cache()
for pkg in KEY_PACKAGES:
try:
deb_pkg = KEY_PACKAGES[pkg]
ver = cache[deb_pkg].installed.version
# Debian just offers a version
pkgs[pkg] = dict(version=ver, release="")
except Exception:
logging.error('', exc_info=True)
return pkgs
@cache.memoized
def runtime_kernel_flags():
ret = os.uname()
try:
ver, rel = ret[2].split('-', 1)
except ValueError:
logging.error('kernel release not found', exc_info=True)
ver, rel = '0', '0'
realtime = 'RT' in ret[3]
return KernelFlags(dict(version=ver, release=rel), realtime)
@cache.memoized
def nested_virtualization():
if cpuarch.is_ppc(cpuarch.real()):
return NestedVirtualization(False, None)
if cpuarch.is_s390(cpuarch.real()):
kvm_modules = ("kvm",)
else:
kvm_modules = ("kvm_intel", "kvm_amd")
for kvm_module in kvm_modules:
kvm_module_path = "/sys/module/%s/parameters/nested" % kvm_module
try:
with open(kvm_module_path) as f:
if f.readline().strip() in ("Y", "1"):
return NestedVirtualization(True, kvm_module)
except IOError as e:
if e.errno != errno.ENOENT:
logging.exception('Error checking %s nested virtualization',
kvm_module)
else:
logging.debug('%s nested virtualization not detected',
kvm_module)
logging.debug('Could not determine status of nested '
'virtualization')
return NestedVirtualization(False, None)
def kernel_features():
return supervdsm.getProxy().get_cpu_vulnerabilities()
@cache.memoized
def boot_uuid():
"""
Get the OS boot partition UUID
"""
cmd = [_FINDMNT, "--output=UUID", "--noheadings", "--target=/boot"]
output = commands.run(cmd)
return output.decode("utf-8").strip()