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import os.path
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import random
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import shutil
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from collections import defaultdict
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import yaml
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from django.conf import settings
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from django.core.cache import cache
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from django.core.files.storage import default_storage
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from django.db import models
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from django.utils.translation import gettext_lazy as _
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from rest_framework.serializers import ValidationError
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from assets.models import Platform
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from common.db.models import JMSBaseModel
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from common.utils import lazyproperty, get_logger
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from common.utils.yml import yaml_load_with_i18n
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logger = get_logger(__name__)
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__all__ = ['Applet', 'AppletPublication']
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class Applet(JMSBaseModel):
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class Type(models.TextChoices):
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general = 'general', _('General')
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web = 'web', _('Web')
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class Edition(models.TextChoices):
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community = 'community', _('Community')
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enterprise = 'enterprise', _('Enterprise')
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name = models.SlugField(max_length=128, verbose_name=_('Name'), unique=True)
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display_name = models.CharField(max_length=128, verbose_name=_('Display name'))
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version = models.CharField(max_length=16, verbose_name=_('Version'))
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author = models.CharField(max_length=128, verbose_name=_('Author'))
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edition = models.CharField(max_length=128, choices=Edition.choices, default=Edition.community,
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verbose_name=_('Edition'))
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type = models.CharField(max_length=16, verbose_name=_('Type'), default='general', choices=Type.choices)
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is_active = models.BooleanField(default=True, verbose_name=_('Is active'))
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builtin = models.BooleanField(default=False, verbose_name=_('Builtin'))
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protocols = models.JSONField(default=list, verbose_name=_('Protocol'))
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can_concurrent = models.BooleanField(default=False, verbose_name=_('Can concurrent'))
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tags = models.JSONField(default=list, verbose_name=_('Tags'))
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comment = models.TextField(default='', blank=True, verbose_name=_('Comment'))
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hosts = models.ManyToManyField(
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through_fields=('applet', 'host'), through='AppletPublication',
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to='AppletHost', verbose_name=_('Hosts')
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)
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class Meta:
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verbose_name = _("Applet")
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def __str__(self):
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return self.name
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@property
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def path(self):
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if self.builtin:
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return os.path.join(settings.APPS_DIR, 'terminal', 'applets', self.name)
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else:
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return default_storage.path('applets/{}'.format(self.name))
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@lazyproperty
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def readme(self):
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readme_file = os.path.join(self.path, 'README.md')
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if os.path.isfile(readme_file):
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with open(readme_file, 'r') as f:
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return f.read()
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return ''
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@property
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def manifest(self):
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path = os.path.join(self.path, 'manifest.yml')
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if not os.path.exists(path):
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return None
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with open(path, 'r') as f:
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return yaml.safe_load(f)
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@property
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def icon(self):
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path = os.path.join(self.path, 'icon.png')
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if not os.path.exists(path):
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return None
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return os.path.join(settings.MEDIA_URL, 'applets', self.name, 'icon.png')
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@staticmethod
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def validate_pkg(d):
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files = ['manifest.yml', 'icon.png', 'setup.yml']
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for name in files:
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path = os.path.join(d, name)
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if not os.path.exists(path):
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raise ValidationError({'error': _('Applet pkg not valid, Missing file {}').format(name)})
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with open(os.path.join(d, 'manifest.yml'), encoding='utf8') as f:
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manifest = yaml_load_with_i18n(f)
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if not manifest.get('name', ''):
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raise ValidationError({'error': 'Missing name in manifest.yml'})
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return manifest
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def load_platform_if_need(self, d):
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from assets.serializers import PlatformSerializer
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from assets.const import CustomTypes
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if not os.path.exists(os.path.join(d, 'platform.yml')):
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return
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try:
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with open(os.path.join(d, 'platform.yml'), encoding='utf8') as f:
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data = yaml_load_with_i18n(f)
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except Exception as e:
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raise ValidationError({'error': _('Load platform.yml failed: {}').format(e)})
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if data['category'] != 'custom':
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raise ValidationError({'error': _('Only support custom platform')})
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try:
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tp = data['type']
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except KeyError:
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raise ValidationError({'error': _('Missing type in platform.yml')})
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if not data.get('automation'):
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data['automation'] = CustomTypes._get_automation_constrains()['*']
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created_by = 'Applet:{}'.format(self.name)
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instance = self.get_related_platform()
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s = PlatformSerializer(data=data, instance=instance)
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s.add_type_choices(tp, tp)
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s.is_valid(raise_exception=True)
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p = s.save()
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p.created_by = created_by
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p.save(update_fields=['created_by'])
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@classmethod
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def install_from_dir(cls, path, builtin=True):
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from terminal.serializers import AppletSerializer
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manifest = cls.validate_pkg(path)
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name = manifest['name']
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instance = cls.objects.filter(name=name).first()
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serializer = AppletSerializer(instance=instance, data=manifest)
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serializer.is_valid(raise_exception=True)
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instance = serializer.save(builtin=builtin)
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instance.load_platform_if_need(path)
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pkg_path = default_storage.path('applets/{}'.format(name))
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if os.path.exists(pkg_path):
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shutil.rmtree(pkg_path)
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shutil.copytree(path, pkg_path)
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return instance, serializer
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host_prefer_key_tpl = 'applet_host_prefer_{}'
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@classmethod
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def clear_host_prefer(cls):
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cache.delete_pattern(cls.host_prefer_key_tpl.format('*'))
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def _select_by_load(self, hosts):
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using_keys = cache.keys(self.host_prefer_key_tpl.format('*'))
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using_host_ids = cache.get_many(using_keys)
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counts = defaultdict(int)
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for host_id in using_host_ids.values():
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counts[host_id] += 1
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hosts = list(sorted(hosts, key=lambda h: counts[h.id]))
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return hosts[0]
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def select_host(self, user, asset):
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hosts = self.hosts.filter(is_active=True)
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hosts = [host for host in hosts if host.load != 'offline']
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if not hosts:
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return None
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spec_label = asset.labels.filter(name__in=['AppletHost', '发布机']).first()
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if spec_label:
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matched = [host for host in hosts if host.name == spec_label.value]
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if matched:
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return matched[0]
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hosts = [h for h in hosts if h.auto_create_accounts]
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prefer_key = self.host_prefer_key_tpl.format(user.id)
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prefer_host_id = cache.get(prefer_key, None)
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pref_host = [host for host in hosts if host.id == prefer_host_id]
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if pref_host:
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host = pref_host[0]
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else:
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host = self._select_by_load(hosts)
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cache.set(prefer_key, str(host.id), timeout=None)
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return host
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def get_related_platform(self):
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created_by = 'Applet:{}'.format(self.name)
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platform = Platform.objects.filter(created_by=created_by).first()
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return platform
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@staticmethod
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def random_select_prefer_account(user, host, accounts):
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msg = 'Applet host remain public accounts: {}: {}'.format(host.name, len(accounts))
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if len(accounts) == 0:
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logger.error(msg)
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return None
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prefer_host_account_key = 'applet_host_prefer_account_{}_{}'.format(user.id, host.id)
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prefer_account_id = cache.get(prefer_host_account_key, None)
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prefer_account = None
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if prefer_account_id:
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prefer_account = accounts.filter(id=prefer_account_id).first()
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if prefer_account:
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account = prefer_account
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else:
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account = random.choice(accounts)
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cache.set(prefer_host_account_key, account.id, timeout=None)
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return account
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accounts_using_key_tmpl = 'applet_host_accounts_{}_{}_{}'
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def select_a_public_account(self, user, host, valid_accounts):
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using_keys = cache.keys(self.accounts_using_key_tmpl.format(host.id, '*', '*')) or []
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accounts_username_used = list(cache.get_many(using_keys).values())
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logger.debug('Applet host account using: {}: {}'.format(host.name, accounts_username_used))
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accounts = valid_accounts.exclude(username__in=accounts_username_used)
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public_accounts = accounts.filter(username__startswith='jms_')
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if not public_accounts:
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public_accounts = accounts.exclude(username__in=['Administrator', 'root'])
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account = self.random_select_prefer_account(user, host, public_accounts)
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return account
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def try_to_use_private_account(self, user, host, valid_accounts):
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host_can_concurrent = str(host.deploy_options.get('RDS_fSingleSessionPerUser', 0)) == '0'
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app_can_concurrent = self.can_concurrent or self.type == 'web'
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all_can_concurrent = host_can_concurrent and app_can_concurrent
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private_account = valid_accounts.filter(username='js_{}'.format(user.username)).first()
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if not private_account:
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logger.debug('Private account not found ...')
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return None
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# 优先使用 private account，支持并发或者不支持并发时，如果私有没有被占用，则使用私有
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account = None
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# 如果都支持，不管私有是否被占用，都使用私有
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if all_can_concurrent:
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logger.debug('All can concurrent, use private account')
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account = private_account
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# 如果主机都不支持并发，则查询一下私有账号有没有任何应用使用，如果没有被使用，则使用私有
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elif not host_can_concurrent:
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private_using_key = self.accounts_using_key_tmpl.format(host.id, private_account.username, '*')
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private_is_using = len(cache.keys(private_using_key))
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logger.debug("Private account is using: {}".format(private_is_using))
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if not private_is_using:
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account = private_account
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# 如果主机支持，但是应用不支持并发，则查询一下私有账号有没有被这个应用使用, 如果没有被使用，则使用私有
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elif host_can_concurrent and not app_can_concurrent:
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private_app_using_key = self.accounts_using_key_tmpl.format(host.id, private_account.username, self.name)
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private_is_using_by_this_app = cache.get(private_app_using_key, False)
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logger.debug("Private account is using {} by {}".format(private_is_using_by_this_app, self.name))
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if not private_is_using_by_this_app:
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account = private_account
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return account
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def select_host_account(self, user, asset):
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# 选择激活的发布机
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host = self.select_host(user, asset)
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if not host:
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return None
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logger.info('Select applet host: {}'.format(host.name))
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valid_accounts = host.accounts.all().filter(is_active=True, privileged=False)
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account = self.try_to_use_private_account(user, host, valid_accounts)
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if not account:
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logger.debug('No private account, try to use public account')
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account = self.select_a_public_account(user, host, valid_accounts)
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if not account:
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logger.debug('No available account for applet host: {}'.format(host.name))
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return None
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ttl = 60 * 60 * 24
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lock_key = self.accounts_using_key_tmpl.format(host.id, account.username, self.name)
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cache.set(lock_key, account.username, ttl)
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res = {
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'host': host,
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'account': account,
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'lock_key': lock_key,
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'ttl': ttl
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}
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logger.debug('Select host and account: {}'.format(res))
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return res
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def delete(self, using=None, keep_parents=False):
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platform = self.get_related_platform()
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if platform and platform.assets.count() == 0:
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platform.delete()
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return super().delete(using, keep_parents)
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class AppletPublication(JMSBaseModel):
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applet = models.ForeignKey('Applet', on_delete=models.CASCADE, related_name='publications',
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verbose_name=_('Applet'))
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host = models.ForeignKey('AppletHost', on_delete=models.CASCADE, related_name='publications',
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verbose_name=_('Hosting'))
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status = models.CharField(max_length=16, default='pending', verbose_name=_('Status'))
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comment = models.TextField(default='', blank=True, verbose_name=_('Comment'))
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class Meta:
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unique_together = ('applet', 'host')
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