name : profile_recommender.py import os import re import errno import procfs import subprocess from tuned.utils.config_parser import ConfigParser, Error try: import syspurpose.files have_syspurpose = True except: have_syspurpose = False import tuned.consts as consts import tuned.logs from tuned.utils.commands import commands log = tuned.logs.get() class ProfileRecommender: def __init__(self, is_hardcoded = False): self._is_hardcoded = is_hardcoded self._commands = commands() self._chassis_type = None def recommend(self): profile = consts.DEFAULT_PROFILE if self._is_hardcoded: return profile has_root = os.geteuid() == 0 if not has_root: log.warning("Profile recommender is running without root privileges. Profiles with virt recommendation condition will be omitted.") matching = self.process_config(consts.RECOMMEND_CONF_FILE, has_root=has_root) if matching is not None: return matching files = {} for directory in consts.RECOMMEND_DIRECTORIES: contents = [] try: contents = os.listdir(directory) except OSError as e: if e.errno != errno.ENOENT: log.error("error accessing %s: %s" % (directory, e)) for name in contents: path = os.path.join(directory, name) files[name] = path for name in sorted(files.keys()): path = files[name] matching = self.process_config(path, has_root=has_root) if matching is not None: return matching return profile def process_config(self, fname, has_root=True): matching_profile = None syspurpose_error_logged = False try: if not os.path.isfile(fname): return None config = ConfigParser(delimiters=('='), inline_comment_prefixes=('#'), strict=False) config.optionxform = str with open(fname) as f: config.read_file(f, fname) for section in config.sections(): match = True for option in config.options(section): value = config.get(section, option, raw=True) if value == "": value = r"^$" if option == "virt": if not has_root: match = False break if not re.match(value, self._commands.execute(["virt-what"])[1], re.S): match = False elif option == "system": if not re.match(value, self._commands.read_file( consts.SYSTEM_RELEASE_FILE, no_error = True), re.S): match = False elif option[0] == "/": if not os.path.exists(option) or not re.match(value, self._commands.read_file(option), re.S): match = False elif option[0:7] == "process": ps = procfs.pidstats() ps.reload_threads() if len(ps.find_by_regex(re.compile(value))) == 0: match = False elif option == "chassis_type": chassis_type = self._get_chassis_type() if not re.match(value, chassis_type, re.IGNORECASE): match = False elif option == "syspurpose_role": role = "" if have_syspurpose: s = syspurpose.files.SyspurposeStore( syspurpose.files.USER_SYSPURPOSE, raise_on_error = True) try: s.read_file() role = s.contents["role"] except (IOError, OSError, KeyError) as e: if hasattr(e, "errno") and e.errno != errno.ENOENT: log.error("Failed to load the syspurpose\ file: %s" % e) else: if not syspurpose_error_logged: log.error("Failed to process 'syspurpose_role' in '%s'\ , the syspurpose module is not available" % fname) syspurpose_error_logged = True if re.match(value, role, re.IGNORECASE) is None: match = False if match: # remove the ",.*" suffix r = re.compile(r",[^,]*$") matching_profile = r.sub("", section) break except (IOError, OSError, Error) as e: log.error("error processing '%s', %s" % (fname, e)) return matching_profile def _get_chassis_type(self): if self._chassis_type is not None: log.debug("returning cached chassis type '%s'" % self._chassis_type) return self._chassis_type # Check DMI sysfs first # Based on SMBios 3.3.0 specs (https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.3.0.pdf) DMI_CHASSIS_TYPES = ["", "Other", "Unknown", "Desktop", "Low Profile Desktop", "Pizza Box", "Mini Tower", "Tower", "Portable", "Laptop", "Notebook", "Hand Held", "Docking Station", "All In One", "Sub Notebook", "Space-saving", "Lunch Box", "Main Server Chassis", "Expansion Chassis", "Sub Chassis", "Bus Expansion Chassis", "Peripheral Chassis", "RAID Chassis", "Rack Mount Chassis", "Sealed-case PC", "Multi-system", "CompactPCI", "AdvancedTCA", "Blade", "Blade Enclosing", "Tablet", "Convertible", "Detachable", "IoT Gateway", "Embedded PC", "Mini PC", "Stick PC"] try: with open('/sys/devices/virtual/dmi/id/chassis_type', 'r') as sysfs_chassis_type: chassis_type_id = int(sysfs_chassis_type.read()) self._chassis_type = DMI_CHASSIS_TYPES[chassis_type_id] except IndexError: log.error("Unknown chassis type id read from dmi sysfs: %d" % chassis_type_id) except (OSError, IOError) as e: log.warn("error accessing dmi sysfs file: %s" % e) if self._chassis_type: log.debug("chassis type - %s" % self._chassis_type) return self._chassis_type # Fallback - try parsing dmidecode output try: p_dmi = subprocess.Popen(['dmidecode', '-s', 'chassis-type'], stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True) (dmi_output, dmi_error) = p_dmi.communicate() if p_dmi.returncode: log.error("dmidecode finished with error (ret %d): '%s'" % (p_dmi.returncode, dmi_error)) else: self._chassis_type = dmi_output.strip().decode() except (OSError, IOError) as e: log.warn("error executing dmidecode tool : %s" % e) if not self._chassis_type: log.debug("could not determine chassis type.") self._chassis_type = "" else: log.debug("chassis type - %s" % self._chassis_type) return self._chassis_type