from __future__ import unicode_literals import os import uuid from django.db import models from django.utils.translation import ugettext_lazy as _ from django.utils import timezone from django.conf import settings from django.core.files.storage import default_storage from django.core.cache import cache from assets.models import Asset from users.models import User from orgs.mixins.models import OrgModelMixin from common.db.models import TextChoices from ..backends import get_multi_command_storage class Session(OrgModelMixin): class LOGIN_FROM(TextChoices): ST = 'ST', 'SSH Terminal' RT = 'RT', 'RDP Terminal' WT = 'WT', 'Web Terminal' class PROTOCOL(TextChoices): SSH = 'ssh', 'ssh' RDP = 'rdp', 'rdp' VNC = 'vnc', 'vnc' TELNET = 'telnet', 'telnet' MYSQL = 'mysql', 'mysql' ORACLE = 'oracle', 'oracle' MARIADB = 'mariadb', 'mariadb' POSTGRESQL = 'postgresql', 'postgresql' K8S = 'k8s', 'kubernetes' id = models.UUIDField(default=uuid.uuid4, primary_key=True) user = models.CharField(max_length=128, verbose_name=_("User"), db_index=True) user_id = models.CharField(blank=True, default='', max_length=36, db_index=True) asset = models.CharField(max_length=128, verbose_name=_("Asset"), db_index=True) asset_id = models.CharField(blank=True, default='', max_length=36, db_index=True) system_user = models.CharField(max_length=128, verbose_name=_("System user"), db_index=True) system_user_id = models.CharField(blank=True, default='', max_length=36, db_index=True) login_from = models.CharField(max_length=2, choices=LOGIN_FROM.choices, default="ST", verbose_name=_("Login from")) remote_addr = models.CharField(max_length=128, verbose_name=_("Remote addr"), blank=True, null=True) is_success = models.BooleanField(default=True, db_index=True) is_finished = models.BooleanField(default=False, db_index=True) has_replay = models.BooleanField(default=False, verbose_name=_("Replay")) has_command = models.BooleanField(default=False, verbose_name=_("Command")) terminal = models.ForeignKey('terminal.Terminal', null=True, on_delete=models.DO_NOTHING, db_constraint=False) protocol = models.CharField(choices=PROTOCOL.choices, default='ssh', max_length=16, db_index=True) date_start = models.DateTimeField(verbose_name=_("Date start"), db_index=True, default=timezone.now) date_end = models.DateTimeField(verbose_name=_("Date end"), null=True) upload_to = 'replay' ACTIVE_CACHE_KEY_PREFIX = 'SESSION_ACTIVE_{}' _DATE_START_FIRST_HAS_REPLAY_RDP_SESSION = None def get_rel_replay_path(self, version=2): """ 获取session日志的文件路径 :param version: 原来后缀是 .gz，为了统一新版本改为 .replay.gz :return: """ suffix = '.replay.gz' if version == 1: suffix = '.gz' date = self.date_start.strftime('%Y-%m-%d') return os.path.join(date, str(self.id) + suffix) def get_local_path(self, version=2): rel_path = self.get_rel_replay_path(version=version) if version == 2: local_path = os.path.join(self.upload_to, rel_path) else: local_path = rel_path return local_path @property def asset_obj(self): return Asset.objects.get(id=self.asset_id) @property def user_obj(self): return User.objects.get(id=self.user_id) @property def _date_start_first_has_replay_rdp_session(self): if self.__class__._DATE_START_FIRST_HAS_REPLAY_RDP_SESSION is None: instance = self.__class__.objects.filter( protocol='rdp', has_replay=True ).order_by('date_start').first() if not instance: date_start = timezone.now() - timezone.timedelta(days=365) else: date_start = instance.date_start self.__class__._DATE_START_FIRST_HAS_REPLAY_RDP_SESSION = date_start return self.__class__._DATE_START_FIRST_HAS_REPLAY_RDP_SESSION def can_replay(self): if self.has_replay: return True if self.date_start < self._date_start_first_has_replay_rdp_session: return True return False @property def can_join(self): _PROTOCOL = self.PROTOCOL if self.is_finished: return False if self.login_from == self.LOGIN_FROM.RT: return False if self.protocol in [ _PROTOCOL.SSH, _PROTOCOL.VNC, _PROTOCOL.RDP, _PROTOCOL.TELNET, _PROTOCOL.K8S ]: return True else: return False @property def db_protocols(self): _PROTOCOL = self.PROTOCOL return [_PROTOCOL.MYSQL, _PROTOCOL.MARIADB, _PROTOCOL.ORACLE, _PROTOCOL.POSTGRESQL] @property def can_terminate(self): _PROTOCOL = self.PROTOCOL if self.is_finished: return False else: return True def save_replay_to_storage(self, f): local_path = self.get_local_path() try: name = default_storage.save(local_path, f) except OSError as e: return None, e if settings.SERVER_REPLAY_STORAGE: from ..tasks import upload_session_replay_to_external_storage upload_session_replay_to_external_storage.delay(str(self.id)) return name, None @classmethod def set_sessions_active(cls, session_ids): data = {cls.ACTIVE_CACHE_KEY_PREFIX.format(i): i for i in session_ids} cache.set_many(data, timeout=5*60) @classmethod def get_active_sessions(cls): return cls.objects.filter(is_finished=False) def is_active(self): key = self.ACTIVE_CACHE_KEY_PREFIX.format(self.id) return bool(cache.get(key)) @property def command_amount(self): command_store = get_multi_command_storage() return command_store.count(session=str(self.id)) @property def login_from_display(self): return self.get_login_from_display() @classmethod def generate_fake(cls, count=100, is_finished=True): import random from orgs.models import Organization from users.models import User from assets.models import Asset, SystemUser from orgs.utils import get_current_org from common.utils.random import random_datetime, random_ip org = get_current_org() if not org or org.is_root(): Organization.default().change_to() i = 0 users = User.objects.all()[:100] assets = Asset.objects.all()[:100] system_users = SystemUser.objects.all()[:100] while i < count: user_random = random.choices(users, k=10) assets_random = random.choices(assets, k=10) system_users = random.choices(system_users, k=10) ziped = zip(user_random, assets_random, system_users) sessions = [] now = timezone.now() month_ago = now - timezone.timedelta(days=30) for user, asset, system_user in ziped: ip = random_ip() date_start = random_datetime(month_ago, now) date_end = random_datetime(date_start, date_start+timezone.timedelta(hours=2)) data = dict( user=str(user), user_id=user.id, asset=str(asset), asset_id=asset.id, system_user=str(system_user), system_user_id=system_user.id, remote_addr=ip, date_start=date_start, date_end=date_end, is_finished=is_finished, ) sessions.append(Session(**data)) cls.objects.bulk_create(sessions) i += 10 class Meta: db_table = "terminal_session" ordering = ["-date_start"] def __str__(self): return "{0.id} of {0.user} to {0.asset}".format(self)