# -*- coding: utf-8 -*- # vim: set et sts=2: ############################################################################## # # Copyright (c) 2010, 2011, 2012 Vifib SARL and Contributors. # All Rights Reserved. # # WARNING: This program as such is intended to be used by professional # programmers who take the whole responsibility of assessing all potential # consequences resulting from its eventual inadequacies and bugs # End users who are looking for a ready-to-use solution with commercial # guarantees and support are strongly advised to contract a Free Software # Service Company # # 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 3 # 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. # ############################################################################## import ConfigParser import errno import fcntl import grp import json import logging import math import netaddr import netifaces import os import glob import pwd import random import shutil import socket import struct import subprocess import sys import threading import time import traceback import zipfile import platform from urllib2 import urlopen import lxml.etree import xml_marshaller.xml_marshaller import slapos.util from slapos.util import mkdir_p import slapos.slap as slap from slapos import version logger = logging.getLogger("slapos.format") # dict[str: ManagerClass] used in configuration and XML dump of computer # this dictionary is intended to be filled after each definition of a Manager available_managers = {} def prettify_xml(xml): root = lxml.etree.fromstring(xml) return lxml.etree.tostring(root, pretty_print=True) class OS(object): """Wrap parts of the 'os' module to provide logging of performed actions.""" _os = os def __init__(self, conf): self._dry_run = conf.dry_run self._logger = conf.logger add = self._addWrapper add('chown') add('chmod') add('makedirs') add('mkdir') def _addWrapper(self, name): def wrapper(*args, **kw): arg_list = [repr(x) for x in args] + [ '%s=%r' % (x, y) for x, y in kw.iteritems() ] self._logger.debug('%s(%s)' % (name, ', '.join(arg_list))) if not self._dry_run: getattr(self._os, name)(*args, **kw) setattr(self, name, wrapper) def __getattr__(self, name): return getattr(self._os, name) class UsageError(Exception): pass class NoAddressOnInterface(Exception): """ Exception raised if there is no address on the interface to construct IPv6 address with. Attributes: brige: String, the name of the interface. """ def __init__(self, interface): super(NoAddressOnInterface, self).__init__( 'No IPv6 found on interface %s to construct IPv6 with.' % interface ) class AddressGenerationError(Exception): """ Exception raised if the generation of an IPv6 based on the prefix obtained from the interface failed. Attributes: addr: String, the invalid address the exception is raised for. """ def __init__(self, addr): super(AddressGenerationError, self).__init__( 'Generated IPv6 %s seems not to be a valid IP.' % addr ) def getPublicIPv4Address(): test_list = [ { "url": 'https://api.ipify.org/?format=json' , "json_key": "ip"}, { "url": 'http://httpbin.org/ip', "json_key": "origin"}, { "url": 'http://jsonip.com', "json_key": "ip"}] previous = None ipv4 = None for test in test_list: if ipv4 is not None: previous = ipv4 try: ipv4 = json.load(urlopen(test["url"]))[test["json_key"]] except: ipv4 = None if ipv4 is not None and ipv4 == previous: return ipv4 def callAndRead(argument_list, raise_on_error=True): popen = subprocess.Popen(argument_list, stdout=subprocess.PIPE, stderr=subprocess.STDOUT) result = popen.communicate()[0] if raise_on_error and popen.returncode != 0: raise ValueError('Issue while invoking %r, result was:\n%s' % ( argument_list, result)) return popen.returncode, result def isGlobalScopeAddress(a): """Returns True if a is global scope IP v4/6 address""" ip = netaddr.IPAddress(a) return not ip.is_link_local() and not ip.is_loopback() and \ not ip.is_reserved() and ip.is_unicast() def netmaskToPrefixIPv4(netmask): """Convert string represented netmask to its integer prefix""" return netaddr.strategy.ipv4.netmask_to_prefix[ netaddr.strategy.ipv4.str_to_int(netmask)] def netmaskToPrefixIPv6(netmask): """Convert string represented netmask to its integer prefix""" return netaddr.strategy.ipv6.netmask_to_prefix[ netaddr.strategy.ipv6.str_to_int(netmask)] def getIfaceAddressIPv4(iface): """return dict containing ipv4 address netmask, network and broadcast address of interface""" if not iface in netifaces.interfaces(): raise ValueError('Could not find interface called %s to use as gateway ' \ 'for tap network' % iface) try: addresses_list = netifaces.ifaddresses(iface)[socket.AF_INET] if len (addresses_list) > 0: addresses = addresses_list[0].copy() addresses['network'] = str(netaddr.IPNetwork('%s/%s' % (addresses['addr'], addresses['netmask'])).cidr.network) return addresses else: return {} except KeyError: raise KeyError('Could not find IPv4 adress on interface %s.' % iface) def getIPv4SubnetAddressRange(ip_address, mask, size): """Check if a given ipaddress can be used to create 'size' host ip address, then return list of ip address in the subnet""" ip = netaddr.IPNetwork('%s/%s' % (ip_address, mask)) # Delete network and default ip_address from the list ip_list = [x for x in sorted(list(ip)) if str(x) != ip_address and x.value != ip.cidr.network.value] if len(ip_list) < size: raise ValueError('Could not create %s tap interfaces from address %s.' % ( size, ip_address)) return ip_list def _getDict(obj): """ Serialize an object into dictionaries. List and dict will remains the same, basic type too. But encapsulated object will be returned as dict. Set, collections and other aren't handle for now. Args: obj: an object of any type. Returns: A dictionary if the given object wasn't a list, a list otherwise. """ if isinstance(obj, list): return [_getDict(item) for item in obj] if isinstance(obj, dict): dikt = obj else: try: dikt = obj.__dict__ except AttributeError: return obj return { key: _getDict(value) \ for key, value in dikt.iteritems() \ # do not attempt to serialize logger: it is both useless and recursive. # do not serialize attributes starting with "_", let the classes have some privacy if not key.startswith("_") } class Manager(object): short_name = None def format(self): raise UnimplementedError("Implement function to format underlaying OS") def update(self): raise UnimplementedError("Implement function to format underlaying OS") class CGroupManager(Manager): """Manage cgroups in terms on initializing and runtime operations. This class takes advantage of slapformat being run periodically thus it can act as a "daemon" performing runtime tasks. """ short_name = 'cgroup' cpu_exclusive_file = ".slapos-cpu-exclusive" cpuset_path = "/sys/fs/cgroup/cpuset/" task_write_mode = "at" def __init__(self, computer): """Extract necessary information from the ``computer``. :param computer: slapos.format.Computer, extract necessary attributes """ self.instance_root = computer.instance_root self.software_gid = computer.software_gid logger.info("Allowing " + self.__class__.__name__) def __str__(self): """Manager representation when dumped to string.""" return self.short_name def is_allowed(self): return os.path.exists("/sys/fs/cgroup/cpuset/cpuset.cpus") def format(self): """Build CGROUP tree to fit SlapOS needs. - Create hierarchy of CPU sets so that every partition can have exclusive hold of one of the CPUs. """ self.prepare_cpuset() self.prepare_cpu_space() def update(self): """Control runtime state of the computer.""" cpu0_path = os.path.join(self.cpuset_path, "cpu0") if os.path.exists(cpu0_path): # proceed only whe CPUSETs were formatted by this manager self.prepare_cpu_space() self.ensure_exlusive_cpu() else: logger.warning("Computer was not formatted by {} because {} doesn't exist!".format( self.__class__.__name__, cpu0_path)) def prepare_cpuset(self): """Create cgroup folder per-CPU with exclusive access to the CPU. Those folders are "/sys/fs/cgroup/cpuset/cpu<N>". """ for cpu in self._cpu_list(): cpu_path = self._prepare_folder( os.path.join(self.cpuset_path, "cpu" + str(cpu))) with open(cpu_path + "/cpuset.cpus", "wt") as fx: fx.write(str(cpu)) # this cgroup manages only this cpu with open(cpu_path + "/cpuset.cpu_exclusive", "wt") as fx: fx.write("1") # manages it exclusively with open(cpu_path + "/cpuset.mems", "wt") as fx: fx.write("0") # it doesn't work without that os.chown(cpu_path + "/tasks", -1, self.software_gid) os.chmod(cpu_path + "/tasks", 0o664) def ensure_exlusive_cpu(self): """Move processes among exclusive CPUSets based on software release demands. We expect PIDs which require own CPU to be found in ~instance/.slapos-cpu-exclusive """ cpu_list = self._cpu_list() generic_cpu = cpu_list[0] exclusive_cpu_list = cpu_list[1:] # gather all running PIDs for filtering out stale PIDs running_pid_set = set() with open(os.path.join(self.cpuset_path, "tasks"), "rt") as fi: running_pid_set.update(map(int, fi.read().split())) with open(os.path.join(self.cpuset_path, "cpu" + str(generic_cpu), "tasks"), "rt") as fi: running_pid_set.update(map(int, fi.read().split())) # gather already exclusively running PIDs exclusive_pid_set = set() for exclusive_cpu in exclusive_cpu_list: with open(os.path.join(self.cpuset_path, "cpu" + str(exclusive_cpu), "tasks"), "rt") as fi: exclusive_pid_set.update(map(int, fi.read().split())) for request_file in glob.iglob(os.path.join(self.instance_root, '*', CGroupManager.cpu_exclusive_file)): with open(request_file, "rt") as fi: # take such PIDs which are either really running or are not already exclusive request_pid_list = [int(pid) for pid in fi.read().split() if int(pid) in running_pid_set or int(pid) not in exclusive_pid_set] with open(request_file, "wt") as fo: fo.write("") # empty file (we will write back only PIDs which weren't moved) for request_pid in request_pid_list: assigned_cpu = self._move_to_exclusive_cpu(request_pid) if assigned_cpu < 0: # if no exclusive CPU was assigned - write the PID back and try other time with open(request_file, "at") as fo: fo.write(str(request_pid) + "\n") def prepare_cpu_space(self): """Move all PIDs from the pool of all CPUs into the first exclusive CPU.""" with open(os.path.join(self.cpuset_path, "tasks"), "rt") as fi: running_list = sorted(list(map(int, fi.read().split())), reverse=True) first_cpu = self._cpu_list()[0] success_set = set() refused_set = set() for pid in running_list: try: self._move_task(pid, first_cpu) success_set.add(pid) time.sleep(0.01) except IOError as e: refused_set.add(pid) logger.debug("Refused to move {:d} PIDs: {!s}\n" "Suceeded in moving {:d} PIDs {!s}\n".format( len(refused_set), refused_set, len(success_set), success_set) ) def _cpu_list(self): """Extract IDs of available CPUs and return them as a list. The first one will be always used for all non-exclusive processes. :return: list[int] """ cpu_list = [] # types: list[int] with open(self.cpuset_path + "cpuset.cpus", "rt") as cpu_def: for cpu_def_split in cpu_def.read().strip().split(","): # IDs can be in form "0-4" or "0,1,2,3,4" if "-" in cpu_def_split: a, b = map(int, cpu_def_split.split("-")) cpu_list.extend(range(a, b + 1)) # because cgroup's range is inclusive continue cpu_list.append(int(cpu_def_split)) return cpu_list def _move_to_exclusive_cpu(self, pid): """Try all exclusive CPUs and place the ``pid`` to the first available one. :return: int, cpu_id of used CPU, -1 if placement was not possible """ exclusive_cpu_list = self._cpu_list()[1:] for exclusive_cpu in exclusive_cpu_list: # gather tasks assigned to current exclusive CPU task_path = os.path.join(self.cpuset_path, "cpu" + str(exclusive_cpu), "tasks") with open(task_path, "rt") as fi: task_list = fi.read().split() if len(task_list) > 0: continue # skip occupied CPUs return self._move_task(pid, exclusive_cpu)[1] return -1 def _move_task(self, pid, cpu_id): """Move ``pid`` to ``cpu_id``.""" with open(os.path.join(self.cpuset_path, "cpu" + str(cpu_id), "tasks"), self.task_write_mode) as fo: fo.write(str(pid) + "\n") return pid, cpu_id def _prepare_folder(self, folder): """If-Create folder and set group write permission.""" if not os.path.exists(folder): os.mkdir(folder) os.chown(folder, -1, self.software_gid) # make your life and testing easier and create mandatory files if they don't exist mandatory_file_list = ("tasks", "cpuset.cpus") for mandatory_file in mandatory_file_list: file_path = os.path.join(folder, mandatory_file) if not os.path.exists(file_path): with open(file_path, "wb"): pass # touche return folder # mark manager available available_managers[CGroupManager.short_name] = CGroupManager class Computer(object): """Object representing the computer""" def __init__(self, reference, interface=None, addr=None, netmask=None, ipv6_interface=None, software_user='slapsoft', tap_gateway_interface=None, instance_root=None, software_root=None, instance_storage_home=None, partition_list=None, managers=None): """ Attributes: reference: str, the reference of the computer. interface: str, the name of the computer's used interface. """ self.reference = str(reference) self.interface = interface self.partition_list = partition_list or [] self.address = addr self.netmask = netmask self.ipv6_interface = ipv6_interface self.software_user = software_user self.tap_gateway_interface = tap_gateway_interface # Used to be static attributes of the class object - didn't make sense (Marco again) assert instance_root is not None and software_root is not None, \ "Computer's instance_root and software_root must not be empty!" self.software_root = software_root self.instance_root = instance_root self.instance_storage_home = instance_storage_home # The following properties are updated on update() method self.public_ipv4_address = None self.os_type = None self.python_version = None self.slapos_version = None # HASA relation to managers (could turn into plugins with `format` and `update` methods) self.managers = managers # for serialization # hide list[Manager] from serializer by prepending "_" self._manager_list = tuple(filter(lambda manager: manager.is_allowed(), (available_managers[manager_str](self) for manager_str in managers))) \ if managers else tuple() def __getinitargs__(self): return (self.reference, self.interface) def getAddress(self, allow_tap=False): """ Return a list of the interface address not attributed to any partition (which are therefore free for the computer itself). Returns: False if the interface isn't available, else the list of the free addresses. """ if self.interface is None: return {'addr': self.address, 'netmask': self.netmask} computer_partition_address_list = [] for partition in self.partition_list: for address in partition.address_list: if netaddr.valid_ipv6(address['addr']): computer_partition_address_list.append(address['addr']) # Going through addresses of the computer's interface for address_dict in self.interface.getGlobalScopeAddressList(): # Comparing with computer's partition addresses if address_dict['addr'] not in computer_partition_address_list: return address_dict if allow_tap: # all addresses on interface are for partition, so let's add new one computer_tap = Tap('compdummy') computer_tap.createWithOwner(User('root'), attach_to_tap=True) self.interface.addTap(computer_tap) return self.interface.addAddr() # Can't find address raise NoAddressOnInterface('No valid IPv6 found on %s.' % self.interface.name) def update(self): """Update computer runtime info and state.""" for manager in self._manager_list: logger.info("Updating computer with " + manager.__class__.__name__) manager.update() # Collect environmental hardware/network information. self.public_ipv4_address = getPublicIPv4Address() self.slapos_version = version.version self.python_version = platform.python_version() self.os_type = platform.platform() def send(self, conf): """ Send a marshalled dictionary of the computer object serialized via_getDict. """ slap_instance = slap.slap() connection_dict = {} if conf.key_file and conf.cert_file: connection_dict['key_file'] = conf.key_file connection_dict['cert_file'] = conf.cert_file slap_instance.initializeConnection(conf.master_url, **connection_dict) slap_computer = slap_instance.registerComputer(self.reference) if conf.dry_run: return try: slap_computer.updateConfiguration(xml_marshaller.xml_marshaller.dumps(_getDict(self))) except slap.NotFoundError as error: raise slap.NotFoundError("%s\nERROR: This SlapOS node is not recognised by " "SlapOS Master and/or computer_id and certificates don't match. " "Please make sure computer_id of slapos.cfg looks " "like 'COMP-123' and is correct.\nError is : 404 Not Found." % error) def dump(self, path_to_xml, path_to_json, logger): """ Dump the computer object to an xml file via xml_marshaller. Args: path_to_xml: String, path to the file to load. path_to_json: String, path to the JSON version to save. """ computer_dict = _getDict(self) if path_to_json: with open(path_to_json, 'wb') as fout: fout.write(json.dumps(computer_dict, sort_keys=True, indent=2)) new_xml = xml_marshaller.xml_marshaller.dumps(computer_dict) new_pretty_xml = prettify_xml(new_xml) path_to_archive = path_to_xml + '.zip' if os.path.exists(path_to_archive) and os.path.exists(path_to_xml): # the archive file exists, we only backup if something has changed with open(path_to_xml, 'rb') as fin: if fin.read() == new_pretty_xml: # computer configuration did not change, nothing to write return if os.path.exists(path_to_xml): try: self.backup_xml(path_to_archive, path_to_xml) except: # might be a corrupted zip file. let's move it out of the way and retry. shutil.move(path_to_archive, path_to_archive + time.strftime('_broken_%Y%m%d-%H:%M')) try: self.backup_xml(path_to_archive, path_to_xml) except: # give up trying logger.exception("Can't backup %s:", path_to_xml) with open(path_to_xml, 'wb') as fout: fout.write(new_pretty_xml) for partition in self.partition_list: partition.dump() def backup_xml(self, path_to_archive, path_to_xml): """ Stores a copy of the current xml file to an historical archive. """ xml_content = open(path_to_xml).read() saved_filename = os.path.basename(path_to_xml) + time.strftime('.%Y%m%d-%H:%M') with zipfile.ZipFile(path_to_archive, 'a') as archive: archive.writestr(saved_filename, xml_content, zipfile.ZIP_DEFLATED) @classmethod def load(cls, path_to_xml, reference, ipv6_interface, tap_gateway_interface, instance_root=None, software_root=None, managers=None): """ Create a computer object from a valid xml file. Arg: path_to_xml: String, a path to a valid file containing a valid configuration. Return: A Computer object. """ with open(path_to_xml, "rb") as fi: dumped_dict = xml_marshaller.xml_marshaller.load(fi) # Reconstructing the computer object from the xml computer = Computer( reference=reference, addr=dumped_dict['address'], netmask=dumped_dict['netmask'], ipv6_interface=ipv6_interface, software_user=dumped_dict.get('software_user', 'slapsoft'), tap_gateway_interface=tap_gateway_interface, software_root=dumped_dict.get('software_root', software_root), instance_root=dumped_dict.get('instance_root', instance_root), managers=dumped_dict.get('managers', managers), ) for i, partition_dict in enumerate(dumped_dict['partition_list']): if partition_dict['user']: user = User(partition_dict['user']['name']) else: user = User('root') if partition_dict['tap']: tap = Tap(partition_dict['tap']['name']) if tap_gateway_interface: tap.ipv4_addr = partition_dict['tap'].get('ipv4_addr', '') tap.ipv4_netmask = partition_dict['tap'].get('ipv4_netmask', '') tap.ipv4_gateway = partition_dict['tap'].get('ipv4_gateway', '') tap.ipv4_network = partition_dict['tap'].get('ipv4_network', '') else: tap = Tap(partition_dict['reference']) if partition_dict.get('tun') is not None and partition_dict['tun'].get('ipv4_addr') is not None: tun = Tun(partition_dict['tun']['name'], i, len(dumped_dict['partition_list'])) tun.ipv4_addr = partition_dict['tun']['ipv4_addr'] else: tun = Tun("slaptun" + str(i), i, len(dumped_dict['partition_list'])) address_list = partition_dict['address_list'] external_storage_list = partition_dict.get('external_storage_list', []) partition = Partition( reference=partition_dict['reference'], path=partition_dict['path'], user=user, address_list=address_list, tap=tap, tun=tun, external_storage_list=external_storage_list, ) computer.partition_list.append(partition) return computer def _speedHackAddAllOldIpsToInterface(self): """ Speed hack: Blindly add all IPs from existing configuration, just to speed up actual computer configuration later on. """ # XXX-TODO: only add an address if it doesn't already exist. if self.ipv6_interface: interface_name = self.ipv6_interface elif self.interface: interface_name = self.interface.name else: return for partition in self.partition_list: try: for address in partition.address_list: try: netmask = netmaskToPrefixIPv6(address['netmask']) except: continue callAndRead(['ip', 'addr', 'add', '%s/%s' % (address['addr'], netmask), 'dev', interface_name]) except ValueError: pass def _addUniqueLocalAddressIpv6(self, interface_name): """ Create a unique local address in the interface interface_name, so that slapformat can build upon this. See https://en.wikipedia.org/wiki/Unique_local_address. """ command = 'ip address add dev %s fd00::1/64' % interface_name callAndRead(command.split()) @property def software_gid(self): """Return GID for self.software_user. Has to be dynamic because __init__ happens before ``format`` where we effectively create the user and group.""" return pwd.getpwnam(self.software_user)[3] def format(self, alter_user=True, alter_network=True, create_tap=True, use_unique_local_address_block=False): """ Setup underlaying OS so it reflects this instance (``self``). - setup interfaces and addresses - setup TAP and TUN interfaces - add groups and users - construct partitions inside slapgrid """ if alter_network and self.address is not None: self.interface.addAddr(self.address, self.netmask) if use_unique_local_address_block and alter_network: if self.ipv6_interface: network_interface_name = self.ipv6_interface else: network_interface_name = self.interface.name self._addUniqueLocalAddressIpv6(network_interface_name) for path in self.instance_root, self.software_root: if not os.path.exists(path): os.makedirs(path, 0o755) else: os.chmod(path, 0o755) # own self.software_root by software user slapsoft = User(self.software_user) slapsoft.path = self.software_root if alter_user: slapsoft.create() slapsoft_pw = pwd.getpwnam(slapsoft.name) os.chown(slapsoft.path, slapsoft_pw.pw_uid, slapsoft_pw.pw_gid) os.chmod(self.software_root, 0o755) # Iterate over all managers and let them `format` the computer too for manager in self._manager_list: logger.info("Formatting computer with " + manager.__class__.__name__) manager.format() # get list of instance external storage if exist instance_external_list = [] if self.instance_storage_home: # get all /XXX/dataN where N is a digit data_list = glob.glob(os.path.join(self.instance_storage_home, 'data*')) for i in range(0, len(data_list)): data_path = data_list.pop() the_digit = os.path.basename(data_path).split('data')[-1] if the_digit.isdigit(): instance_external_list.append(data_path) tap_address_list = [] if alter_network and self.tap_gateway_interface and create_tap: gateway_addr_dict = getIfaceAddressIPv4(self.tap_gateway_interface) tap_address_list = getIPv4SubnetAddressRange(gateway_addr_dict['addr'], gateway_addr_dict['netmask'], len(self.partition_list)) assert(len(self.partition_list) <= len(tap_address_list)) if alter_network: self._speedHackAddAllOldIpsToInterface() try: for partition_index, partition in enumerate(self.partition_list): # Reconstructing User's partition.path = os.path.join(self.instance_root, partition.reference) partition.user.setPath(partition.path) partition.user.additional_group_list = [slapsoft.name] partition.external_storage_list = ['%s/%s' % (path, partition.reference) for path in instance_external_list] if alter_user: partition.user.create() # Reconstructing Tap if partition.user and partition.user.isAvailable(): owner = partition.user else: owner = User('root') if alter_network and create_tap: # In case it has to be attached to the TAP network device, only one # is necessary for the interface to assert carrier if self.interface.attach_to_tap and partition_index == 0: partition.tap.createWithOwner(owner, attach_to_tap=True) else: partition.tap.createWithOwner(owner) # If tap_gateway_interface is specified, we don't add tap to bridge # but we create route for this tap if not self.tap_gateway_interface: self.interface.addTap(partition.tap) else: next_ipv4_addr = '%s' % tap_address_list.pop(0) if not partition.tap.ipv4_addr: # define new ipv4 address for this tap partition.tap.ipv4_addr = next_ipv4_addr partition.tap.ipv4_netmask = gateway_addr_dict['netmask'] partition.tap.ipv4_gateway = gateway_addr_dict['addr'] partition.tap.ipv4_network = gateway_addr_dict['network'] partition.tap.createRoutes() if alter_network and partition.tun is not None: # create TUN interface per partition as well partition.tun.createWithOwner(owner) partition.tun.createRoutes() # Reconstructing partition's directory partition.createPath(alter_user) partition.createExternalPath(alter_user) # Reconstructing partition's address # There should be two addresses on each Computer Partition: # * global IPv6 # * local IPv4, took from slapformat:ipv4_local_network if not partition.address_list: # regenerate partition.address_list.append(self.interface.addIPv4LocalAddress()) partition.address_list.append(self.interface.addAddr()) elif alter_network: # regenerate list of addresses old_partition_address_list = partition.address_list partition.address_list = [] if len(old_partition_address_list) != 2: raise ValueError( 'There should be exactly 2 stored addresses. Got: %r' % (old_partition_address_list,)) if not any(netaddr.valid_ipv6(q['addr']) for q in old_partition_address_list): raise ValueError('Not valid ipv6 addresses loaded') if not any(netaddr.valid_ipv4(q['addr']) for q in old_partition_address_list): raise ValueError('Not valid ipv6 addresses loaded') for address in old_partition_address_list: if netaddr.valid_ipv6(address['addr']): partition.address_list.append(self.interface.addAddr( address['addr'], address['netmask'])) elif netaddr.valid_ipv4(address['addr']): partition.address_list.append(self.interface.addIPv4LocalAddress( address['addr'])) else: raise ValueError('Address %r is incorrect' % address['addr']) finally: if alter_network and create_tap and self.interface.attach_to_tap: try: self.partition_list[0].tap.detach() except IndexError: pass class Partition(object): """Represent a computer partition.""" resource_file = ".slapos-resource" def __init__(self, reference, path, user, address_list, tap, external_storage_list=[], tun=None): """ Attributes: reference: String, the name of the partition. path: String, the path to the partition folder. user: User, the user linked to this partition. address_list: List of associated IP addresses. tap: Tap, the tap interface linked to this partition e.g. used as a bridge for kvm tun: Tun interface used for special apps simulating ethernet connections external_storage_list: Base path list of folder to format for data storage """ self.reference = str(reference) self.path = str(path) self.user = user self.address_list = address_list or [] self.tap = tap self.tun = tun self.external_storage_list = [] def __getinitargs__(self): return (self.reference, self.path, self.user, self.address_list, self.tap, self.tun) def createPath(self, alter_user=True): """ Create the directory of the partition, assign to the partition user and give it the 750 permission. In case if path exists just modifies it. """ self.path = os.path.abspath(self.path) owner = self.user if self.user else User('root') if not os.path.exists(self.path): os.mkdir(self.path, 0o750) if alter_user: owner_pw = pwd.getpwnam(owner.name) os.chown(self.path, owner_pw.pw_uid, owner_pw.pw_gid) os.chmod(self.path, 0o750) def createExternalPath(self, alter_user=True): """ Create and external directory of the partition, assign to the partition user and give it the 750 permission. In case if path exists just modifies it. """ for path in self.external_storage_list: storage_path = os.path.abspath(path) owner = self.user if self.user else User('root') if not os.path.exists(storage_path): os.mkdir(storage_path, 0o750) if alter_user: owner_pw = pwd.getpwnam(owner.name) os.chown(storage_path, owner_pw.pw_uid, owner_pw.pw_gid) os.chmod(storage_path, 0o750) def dump(self): """Dump available resources into ~partition_home/.slapos-resource.""" file_path = os.path.join(self.path, self.resource_file) logger.info("Partition resources saved to {}".format( self.reference, file_path)) data = _getDict(self) with open(file_path, "wb") as fo: json.dump(data, fo, sort_keys=True, indent=4) owner_pw = pwd.getpwnam(self.user.name) os.chmod(file_path, 0o640) os.chown(file_path, owner_pw.pw_uid, owner_pw.pw_gid) class User(object): """User: represent and manipulate a user on the system.""" path = None def __init__(self, user_name, additional_group_list=None): """ Attributes: user_name: string, the name of the user, who will have is home in """ self.name = str(user_name) self.shell = '/bin/sh' self.additional_group_list = additional_group_list def __getinitargs__(self): return (self.name,) def setPath(self, path): self.path = path def create(self): """ Create a user on the system who will be named after the self.name with its own group and directory. Returns: True: if the user creation went right """ # XXX: This method shall be no-op in case if all is correctly setup # This method shall check if all is correctly done # This method shall not reset groups, just add them grpname = 'grp_' + self.name if sys.platform == 'cygwin' else self.name try: grp.getgrnam(grpname) except KeyError: callAndRead(['groupadd', grpname]) user_parameter_list = ['-d', self.path, '-g', self.name, '-s', self.shell] if self.additional_group_list is not None: user_parameter_list.extend(['-G', ','.join(self.additional_group_list)]) user_parameter_list.append(self.name) try: pwd.getpwnam(self.name) except KeyError: user_parameter_list.append('-r') callAndRead(['useradd'] + user_parameter_list) else: # if the user is already created and used we should not fail callAndRead(['usermod'] + user_parameter_list, raise_on_error=False) # lock the password of user callAndRead(['passwd', '-l', self.name]) return True def isAvailable(self): """ Determine the availability of a user on the system Return: True: if available False: otherwise """ try: pwd.getpwnam(self.name) return True except KeyError: return False class Tap(object): "Tap represent a tap interface on the system" IFF_TAP = 0x0002 TUNSETIFF = 0x400454ca KEEP_TAP_ATTACHED_EVENT = threading.Event() MODE = "tap" def __init__(self, tap_name): """ Attributes: tap_name: String, the name of the tap interface. ipv4_address: String, local ipv4 to route to this tap ipv4_network: String, netmask to use when configure route for this tap gateway_ipv4: String, ipv4 of gateway to be used to reach local network """ self.name = str(tap_name) self.ipv4_addr = "" self.ipv4_netmask = "" self.ipv4_gateway = "" self.ipv4_network = "" def __getinitargs__(self): return (self.name,) def attach(self): """ Attach to the TAP interface, meaning that it just opens the TAP interface and waits for the caller to notify that it can be safely detached. Linux distinguishes administrative and operational state of an network interface. The former can be set manually by running ``ip link set dev <dev> up|down'', whereas the latter states that the interface can actually transmit data (for a wired network interface, it basically means that there is carrier, e.g. the network cable is plugged into a switch for example). In case of bridge: In order to be able to check the uniqueness of IPv6 address assigned to the bridge, the network interface must be up from an administrative *and* operational point of view. However, from Linux 2.6.39, the bridge reflects the state of the underlying device (e.g. the bridge asserts carrier if at least one of its ports has carrier) whereas it always asserted carrier before. This should work fine for "real" network interface, but will not work properly if the bridge only binds TAP interfaces, which, from 2.6.36, reports carrier only and only if an userspace program is attached. """ tap_fd = os.open("/dev/net/tun", os.O_RDWR) try: # Attach to the TAP interface which has previously been created fcntl.ioctl(tap_fd, self.TUNSETIFF, struct.pack("16sI", self.name, self.IFF_TAP)) except IOError as error: # If EBUSY, it means another program is already attached, thus just # ignore it... logger.warning("Cannot create interface " + self.name + ". Does it exist already?") if error.errno != errno.EBUSY: os.close(tap_fd) else: # Block until the caller send an event stating that the program can be # now detached safely, thus bringing down the TAP device (from 2.6.36) # and the bridge at the same time (from 2.6.39) self.KEEP_TAP_ATTACHED_EVENT.wait() finally: os.close(tap_fd) def detach(self): """ Detach to the TAP network interface by notifying the thread which attach to the TAP and closing the TAP file descriptor """ self.KEEP_TAP_ATTACHED_EVENT.set() def createWithOwner(self, owner, attach_to_tap=False): """ Create a tap interface on the system if it doesn't exist yet. """ check_file = '/sys/devices/virtual/net/%s/owner' % self.name owner_id = None if os.path.exists(check_file): with open(check_file) as fx: owner_id = fx.read().strip() try: owner_id = int(owner_id) except ValueError: owner_id = pwd.getpwnam(owner_id).pw_uid # if owner_id != pwd.getpwnam(owner.name).pw_uid: logger.warning("Wrong owner of TUN/TAP interface {}! Not touching it." "Expected {:d} got {:d}".format( self.name, pwd.getpwnam(owner.name).pw_uid, owner_id)) # if the interface already exists - don't do anything return callAndRead(['ip', 'tuntap', 'add', 'dev', self.name, 'mode', self.MODE, 'user', owner.name]) callAndRead(['ip', 'link', 'set', self.name, 'up']) if attach_to_tap: threading.Thread(target=self.attach).start() def createRoutes(self): """ Configure ipv4 route to reach this interface from local network """ if self.ipv4_addr: # Check if this route exits code, result = callAndRead(['ip', 'route', 'show', self.ipv4_addr], raise_on_error=False) if code == 0 and self.ipv4_addr in result and self.name in result: return callAndRead(['ip', 'route', 'add', self.ipv4_addr, 'dev', self.name]) else: raise ValueError("%s should not be empty. No ipv4 address assigned to %s" % (self.ipv4_addr, self.name)) class Tun(Tap): """Represent TUN interface which might be many per user.""" MODE = "tun" BASE_MASK = 12 BASE_NETWORK = "172.16.0.0" def __init__(self, name, sequence=None, partitions=None): """Create TUN interface with subnet according to the optional ``sequence`` number. :param name: name which will appear in ``ip list`` afterwards :param sequence: {int} position of this TUN among all ``partitions`` """ super(Tun, self).__init__(name) if sequence is not None: assert 0 <= sequence < partitions, "0 <= {} < {}".format(sequence, partitions) # create base IPNetwork ip_network = netaddr.IPNetwork(Tun.BASE_NETWORK + "/" + str(Tun.BASE_MASK)) # compute shift in BITS to separate ``partitions`` networks into subset # example: for 30 partitions we need log2(30) = 8 BITS mask_shift = int(math.ceil(math.log(int(partitions), 2.0))) # IPNetwork.subnet returns iterator over all possible subnets of given mask ip_subnets = list(ip_network.subnet(Tun.BASE_MASK + mask_shift)) subnet = ip_subnets[sequence] # For serialization purposes, convert directly to ``str`` self.ipv4_network = str(subnet) self.ipv4_addr = str(subnet.ip) self.ipv4_netmask = str(subnet.netmask) def createRoutes(self): """Extend for physical addition of network address because TAP let this on external class.""" if self.ipv4_network: # add an address code, _ = callAndRead(['ip', 'addr', 'add', self.ipv4_network, 'dev', self.name], raise_on_error=False) if code == 0: # address added to the interface - wait time.sleep(1) else: raise RuntimeError("Cannot setup address on interface {}. " "Address is missing.".format(self.name)) # create routes super(Tun, self).createRoutes() # add iptables rule to accept connections from this interface chain_rule = ['INPUT', '-i', self.name, '-j', 'ACCEPT'] code, _ = callAndRead(['iptables', '-C'] + chain_rule, raise_on_error=False) if code == 0: # 0 means the rule does not exits so we are free to insert it callAndRead(['iptables', '-I'] + chain_rule) class Interface(object): """Represent a network interface on the system""" def __init__(self, logger, name, ipv4_local_network, ipv6_interface=None): """ Attributes: name: String, the name of the interface """ self._logger = logger self.name = str(name) self.ipv4_local_network = ipv4_local_network self.ipv6_interface = ipv6_interface # Attach to TAP network interface, only if the interface interface does not # report carrier _, result = callAndRead(['ip', 'addr', 'list', self.name], raise_on_error=False) self.attach_to_tap = self.isBridge() and ('DOWN' in result.split('\n', 1)[0]) # XXX no __getinitargs__, as instances of this class are never deserialized. def getIPv4LocalAddressList(self): """ Returns currently configured local IPv4 addresses which are in ipv4_local_network """ if not socket.AF_INET in netifaces.ifaddresses(self.name): return [] return [ { 'addr': q['addr'], 'netmask': q['netmask'] } for q in netifaces.ifaddresses(self.name)[socket.AF_INET] if netaddr.IPAddress(q['addr'], 4) in netaddr.glob_to_iprange( netaddr.cidr_to_glob(self.ipv4_local_network)) ] def getGlobalScopeAddressList(self): """Returns currently configured global scope IPv6 addresses""" if self.ipv6_interface: interface_name = self.ipv6_interface else: interface_name = self.name try: address_list = [ q for q in netifaces.ifaddresses(interface_name)[socket.AF_INET6] if isGlobalScopeAddress(q['addr'].split('%')[0]) ] except KeyError: raise ValueError("%s must have at least one IPv6 address assigned" % interface_name) if sys.platform == 'cygwin': for q in address_list: q.setdefault('netmask', 'FFFF:FFFF:FFFF:FFFF::') # XXX: Missing implementation of Unique Local IPv6 Unicast Addresses as # defined in http://www.rfc-editor.org/rfc/rfc4193.txt # XXX: XXX: XXX: IT IS DISALLOWED TO IMPLEMENT link-local addresses as # Linux and BSD are possibly wrongly implementing it -- it is "too local" # it is impossible to listen or access it on same node # XXX: IT IS DISALLOWED to implement ad hoc solution like inventing node # local addresses or anything which does not exists in RFC! return address_list def isBridge(self): try: _, result = callAndRead(['brctl', 'show']) return any(line.startswith(self.name) for line in result.split("\n")) except Exception as e: # the binary "brctl" itself does not exist - bridge is imposible to exist logger.warning(str(e)) return False def getInterfaceList(self): """Returns list of interfaces already present on bridge""" interface_list = [] _, result = callAndRead(['brctl', 'show']) in_interface = False for line in result.split('\n'): if len(line.split()) > 1: if self.name in line: interface_list.append(line.split()[-1]) in_interface = True continue if in_interface: break elif in_interface: if line.strip(): interface_list.append(line.strip()) return interface_list def addTap(self, tap): """ Add the tap interface tap to the bridge. Args: tap: Tap, the tap interface. """ if tap.name not in self.getInterfaceList(): if self.isBridge(): callAndRead(['brctl', 'addif', self.name, tap.name]) else: logger.warning("Interface slapos.cfg:interface_name={} is not a bridge. " "TUN/TAP interface {} might not have internet connection." "".format(self.name, tap.name)) def _addSystemAddress(self, address, netmask, ipv6=True): """Adds system address to interface Returns True if address was added successfully. Returns False if there was issue. """ if ipv6: address_string = '%s/%s' % (address, netmaskToPrefixIPv6(netmask)) af = socket.AF_INET6 if self.ipv6_interface: interface_name = self.ipv6_interface else: interface_name = self.name else: af = socket.AF_INET address_string = '%s/%s' % (address, netmaskToPrefixIPv4(netmask)) interface_name = self.name # check if address is already took by any other interface for interface in netifaces.interfaces(): if interface != interface_name: address_dict = netifaces.ifaddresses(interface) if af in address_dict: if address in [q['addr'].split('%')[0] for q in address_dict[af]]: return False if not af in netifaces.ifaddresses(interface_name) \ or not address in [q['addr'].split('%')[0] for q in netifaces.ifaddresses(interface_name)[af] ]: # add an address callAndRead(['ip', 'addr', 'add', address_string, 'dev', interface_name]) # Fake success for local ipv4 if not ipv6: return True # wait few moments time.sleep(2) # Fake success for local ipv4 if not ipv6: return True # check existence on interface for ipv6 _, result = callAndRead(['ip', '-6', 'addr', 'list', interface_name]) for l in result.split('\n'): if address in l: if 'tentative' in l: # duplicate, remove callAndRead(['ip', 'addr', 'del', address_string, 'dev', interface_name]) return False # found and clean return True # even when added not found, this is bad... return False def _generateRandomIPv4Address(self, netmask): # no addresses found, generate new one # Try 10 times to add address, raise in case if not possible try_num = 10 while try_num > 0: addr = random.choice([q for q in netaddr.glob_to_iprange( netaddr.cidr_to_glob(self.ipv4_local_network))]).format() if (dict(addr=addr, netmask=netmask) not in self.getIPv4LocalAddressList()): # Checking the validity of the IPv6 address if self._addSystemAddress(addr, netmask, False): return dict(addr=addr, netmask=netmask) try_num -= 1 raise AddressGenerationError(addr) def addIPv4LocalAddress(self, addr=None): """Adds local IPv4 address in ipv4_local_network""" netmask = str(netaddr.IPNetwork(self.ipv4_local_network).netmask) if sys.platform == 'cygwin' \ else '255.255.255.255' local_address_list = self.getIPv4LocalAddressList() if addr is None: return self._generateRandomIPv4Address(netmask) elif dict(addr=addr, netmask=netmask) not in local_address_list: if self._addSystemAddress(addr, netmask, False): return dict(addr=addr, netmask=netmask) else: self._logger.warning('Impossible to add old local IPv4 %s. Generating ' 'new IPv4 address.' % addr) return self._generateRandomIPv4Address(netmask) else: # confirmed to be configured return dict(addr=addr, netmask=netmask) def addAddr(self, addr=None, netmask=None): """ Adds IP address to interface. If addr is specified and exists already on interface does nothing. If addr is specified and does not exists on interface, tries to add given address. If it is not possible (ex. because network changed) calculates new address. Args: addr: Wished address to be added to interface. netmask: Wished netmask to be used. Returns: Tuple of (address, netmask). Raises: AddressGenerationError: Couldn't construct valid address with existing one's on the interface. NoAddressOnInterface: There's no address on the interface to construct an address with. """ # Getting one address of the interface as base of the next addresses if self.ipv6_interface: interface_name = self.ipv6_interface else: interface_name = self.name interface_addr_list = self.getGlobalScopeAddressList() # No address found if len(interface_addr_list) == 0: raise NoAddressOnInterface(interface_name) address_dict = interface_addr_list[0] if addr is not None: if dict(addr=addr, netmask=netmask) in interface_addr_list: # confirmed to be configured return dict(addr=addr, netmask=netmask) if netmask == address_dict['netmask']: # same netmask, so there is a chance to add good one interface_network = netaddr.ip.IPNetwork('%s/%s' % (address_dict['addr'], netmaskToPrefixIPv6(address_dict['netmask']))) requested_network = netaddr.ip.IPNetwork('%s/%s' % (addr, netmaskToPrefixIPv6(netmask))) if interface_network.network == requested_network.network: # same network, try to add if self._addSystemAddress(addr, netmask): # succeed, return it return dict(addr=addr, netmask=netmask) else: self._logger.warning('Impossible to add old public IPv6 %s. ' 'Generating new IPv6 address.' % addr) # Try 10 times to add address, raise in case if not possible try_num = 10 netmask = address_dict['netmask'] while try_num > 0: addr = ':'.join(address_dict['addr'].split(':')[:-1] + ['%x' % ( random.randint(1, 65000), )]) socket.inet_pton(socket.AF_INET6, addr) if (dict(addr=addr, netmask=netmask) not in self.getGlobalScopeAddressList()): # Checking the validity of the IPv6 address if self._addSystemAddress(addr, netmask): return dict(addr=addr, netmask=netmask) try_num -= 1 raise AddressGenerationError(addr) def parse_computer_definition(conf, definition_path): conf.logger.info('Using definition file %r' % definition_path) computer_definition = ConfigParser.RawConfigParser({ 'software_user': 'slapsoft', }) computer_definition.read(definition_path) interface = None address = None netmask = None if computer_definition.has_option('computer', 'address'): address, netmask = computer_definition.get('computer', 'address').split('/') if (conf.alter_network and conf.interface_name is not None and conf.ipv4_local_network is not None): interface = Interface(logger=conf.logger, name=conf.interface_name, ipv4_local_network=conf.ipv4_local_network, ipv6_interface=conf.ipv6_interface) computer = Computer( reference=conf.computer_id, interface=interface, addr=address, netmask=netmask, ipv6_interface=conf.ipv6_interface, software_user=computer_definition.get('computer', 'software_user'), tap_gateway_interface=conf.tap_gateway_interface, ) partition_list = [] for partition_number in range(int(conf.partition_amount)): section = 'partition_%s' % partition_number user = User(computer_definition.get(section, 'user')) address_list = [] for a in computer_definition.get(section, 'address').split(): address, netmask = a.split('/') address_list.append(dict(addr=address, netmask=netmask)) tap = Tap(computer_definition.get(section, 'network_interface')) tun = Tun("slaptun" + str(partition_number), partition_number, int(conf.partition_amount)) if conf.create_tap else None partition = Partition(reference=computer_definition.get(section, 'pathname'), path=os.path.join(conf.instance_root, computer_definition.get(section, 'pathname')), user=user, address_list=address_list, tap=tap, tun=tun) partition_list.append(partition) computer.partition_list = partition_list return computer def parse_computer_xml(conf, xml_path): interface = Interface(logger=conf.logger, name=conf.interface_name, ipv4_local_network=conf.ipv4_local_network, ipv6_interface=conf.ipv6_interface) if os.path.exists(xml_path): conf.logger.debug('Loading previous computer data from %r' % xml_path) computer = Computer.load(xml_path, reference=conf.computer_id, ipv6_interface=conf.ipv6_interface, tap_gateway_interface=conf.tap_gateway_interface, software_root=conf.software_root, instance_root=conf.instance_root, managers=conf.managers) # Connect to the interface defined by the configuration computer.interface = interface else: # If no pre-existent configuration found, create a new computer object conf.logger.warning('Creating new computer data with id %r', conf.computer_id) computer = Computer( reference=conf.computer_id, software_root=conf.software_root, instance_root=conf.software_root, interface=interface, addr=None, netmask=None, ipv6_interface=conf.ipv6_interface, software_user=conf.software_user, tap_gateway_interface=conf.tap_gateway_interface, managers=conf.managers, ) partition_amount = int(conf.partition_amount) existing_partition_amount = len(computer.partition_list) if partition_amount < existing_partition_amount: conf.logger.critical('Requested amount of computer partitions (%s) is lower ' 'than already configured (%s), cannot continue', partition_amount, existing_partition_amount) sys.exit(1) elif partition_amount > existing_partition_amount: conf.logger.info('Adding %s new partitions', partition_amount - existing_partition_amount) for i in range(existing_partition_amount, partition_amount): # add new partitions partition = Partition( reference='%s%s' % (conf.partition_base_name, i), path=os.path.join(conf.instance_root, '%s%s' % ( conf.partition_base_name, i)), user=User('%s%s' % (conf.user_base_name, i)), address_list=None, tap=Tap('%s%s' % (conf.tap_base_name, i)), tun=Tun('slaptun' + str(i), i, partition_amount) ) computer.partition_list.append(partition) return computer def write_computer_definition(conf, computer): computer_definition = ConfigParser.RawConfigParser() computer_definition.add_section('computer') if computer.address is not None and computer.netmask is not None: computer_definition.set('computer', 'address', '/'.join( [computer.address, computer.netmask])) for partition_number, partition in enumerate(computer.partition_list): section = 'partition_%s' % partition_number computer_definition.add_section(section) address_list = [] for address in partition.address_list: address_list.append('/'.join([address['addr'], address['netmask']])) computer_definition.set(section, 'address', ' '.join(address_list)) computer_definition.set(section, 'user', partition.user.name) computer_definition.set(section, 'network_interface', partition.tap.name) computer_definition.set(section, 'pathname', partition.reference) computer_definition.write(open(conf.output_definition_file, 'w')) conf.logger.info('Stored computer definition in %r' % conf.output_definition_file) def random_delay(conf): # Add delay between 0 and 1 hour # XXX should be the contrary: now by default, and cron should have # --maximal-delay=3600 if not conf.now: duration = float(60 * 60) * random.random() conf.logger.info('Sleeping for %s seconds. To disable this feature, ' 'use with --now parameter in manual.' % duration) time.sleep(duration) def do_format(conf): random_delay(conf) if conf.input_definition_file: computer = parse_computer_definition(conf, conf.input_definition_file) else: # no definition file, figure out computer computer = parse_computer_xml(conf, conf.computer_xml) computer.instance_storage_home = conf.instance_storage_home conf.logger.info('Updating computer') address = computer.getAddress(conf.create_tap) computer.address = address['addr'] computer.netmask = address['netmask'] if conf.output_definition_file: write_computer_definition(conf, computer) computer.format(alter_user=conf.alter_user, alter_network=conf.alter_network, create_tap=conf.create_tap, use_unique_local_address_block=conf.use_unique_local_address_block) if getattr(conf, 'certificate_repository_path', None): mkdir_p(conf.certificate_repository_path, mode=0o700) computer.update() # Dumping and sending to the erp5 the current configuration if not conf.dry_run: computer.dump(path_to_xml=conf.computer_xml, path_to_json=conf.computer_json, logger=conf.logger) conf.logger.info('Posting information to %r' % conf.master_url) computer.send(conf) conf.logger.info('slapos successfully prepared the computer.') class FormatConfig(object): key_file = None cert_file = None alter_network = None alter_user = None create_tap = None computer_xml = None computer_json = None input_definition_file = None log_file = None output_definition_file = None dry_run = None software_user = None tap_gateway_interface = None use_unique_local_address_block = None instance_storage_home = None managers = None def __init__(self, logger): self.logger = logger @staticmethod def checkRequiredBinary(binary_list): missing_binary_list = [] for b in binary_list: if type(b) != type([]): b = [b] try: callAndRead(b) except ValueError: pass except OSError: missing_binary_list.append(b[0]) if missing_binary_list: raise UsageError('Some required binaries are missing or not ' 'functional: %s' % (','.join(missing_binary_list), )) def mergeConfig(self, args, configp): """ Set options given by parameters. Must be executed before setting up the logger. """ self.key_file = None self.cert_file = None # Set argument parameters for key, value in args.__dict__.items(): setattr(self, key, value) # Merges the arguments and configuration for section in ("slapformat", "slapos"): configuration_dict = dict(configp.items(section)) for key in configuration_dict: if not getattr(self, key, None): setattr(self, key, configuration_dict[key]) def setConfig(self): # setup some nones for parameter in ['interface_name', 'partition_base_name', 'user_base_name', 'tap_base_name', 'ipv4_local_network', 'ipv6_interface']: if getattr(self, parameter, None) is None: setattr(self, parameter, None) # Backward compatibility if not getattr(self, "interface_name", None) \ and getattr(self, "bridge_name", None): setattr(self, "interface_name", self.bridge_name) self.logger.warning('bridge_name option is deprecated and should be ' 'replaced by interface_name.') if not getattr(self, "create_tap", None) \ and getattr(self, "no_bridge", None): setattr(self, "create_tap", not self.no_bridge) self.logger.warning('no_bridge option is deprecated and should be ' 'replaced by create_tap.') # Set defaults lately if self.alter_network is None: self.alter_network = 'True' if self.alter_user is None: self.alter_user = 'True' if self.software_user is None: self.software_user = 'slapsoft' if self.create_tap is None: self.create_tap = True if self.tap_gateway_interface is None: self.tap_gateway_interface = '' if self.use_unique_local_address_block is None: self.use_unique_local_address_block = False # Convert strings to booleans for option in ['alter_network', 'alter_user', 'create_tap', 'use_unique_local_address_block']: attr = getattr(self, option) if isinstance(attr, str): if attr.lower() == 'true': root_needed = True setattr(self, option, True) elif attr.lower() == 'false': setattr(self, option, False) else: message = 'Option %r needs to be "True" or "False", wrong value: ' \ '%r' % (option, getattr(self, option)) self.logger.error(message) raise UsageError(message) # Split str into list[str] and check availability of every manager # Config value is expected to be strings separated by spaces or commas managers = [] for manager in self.managers.replace(",", " ").split(): if manager not in available_managers: raise ValueError("Unknown manager \"{}\"! Known are: {!s}".format( manager, list(available_managers.keys()))) managers.append(manager) self.managers = managers # replace original str with list[str] of known managers if not self.dry_run: if self.alter_user: self.checkRequiredBinary(['groupadd', 'useradd', 'usermod', ['passwd', '-h']]) if self.create_tap or self.alter_network: self.checkRequiredBinary(['ip']) # Required, even for dry run if self.alter_network and self.create_tap: self.checkRequiredBinary(['brctl']) # Check mandatory options for parameter in ('computer_id', 'instance_root', 'master_url', 'software_root', 'computer_xml'): if not getattr(self, parameter, None): raise UsageError("Parameter '%s' is not defined." % parameter) # Check existence of SSL certificate files, if defined for attribute in ['key_file', 'cert_file', 'master_ca_file']: file_location = getattr(self, attribute, None) if file_location is not None: if not os.path.exists(file_location): self.logger.fatal('File %r does not exist or is not readable.' % file_location) sys.exit(1) self.logger.debug('Started.') if self.dry_run: self.logger.info("Dry-run mode enabled.") if self.create_tap: self.logger.info("Tap creation mode enabled.") # Calculate path once self.computer_xml = os.path.abspath(self.computer_xml) if self.input_definition_file: self.input_definition_file = os.path.abspath(self.input_definition_file) if self.output_definition_file: self.output_definition_file = os.path.abspath(self.output_definition_file) tracing_monkeypatch_mark = [] def tracing_monkeypatch(conf): """Substitute os module and callAndRead function with tracing wrappers.""" # This function is called again if "slapos node boot" failed. # Don't wrap the logging method again, otherwise the output becomes double. if tracing_monkeypatch_mark: return global os global callAndRead real_callAndRead = callAndRead os = OS(conf) if conf.dry_run: def dry_callAndRead(argument_list, raise_on_error=True): if argument_list == ['brctl', 'show']: return real_callAndRead(argument_list, raise_on_error) else: return 0, '' callAndRead = dry_callAndRead def fake_getpwnam(user): class result(object): pw_uid = 12345 pw_gid = 54321 return result pwd.getpwnam = fake_getpwnam else: dry_callAndRead = real_callAndRead def logging_callAndRead(argument_list, raise_on_error=True): conf.logger.debug(' '.join(argument_list)) return dry_callAndRead(argument_list, raise_on_error) callAndRead = logging_callAndRead # Put a mark. This function was called once. tracing_monkeypatch_mark.append(None)