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