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import datetime
import json
import logging
from json import JSONDecodeError
from typing import Optional
from constants import HIDDEN_VALUE
from core.entities.provider_configuration import ProviderConfiguration
from core.helper import encrypter
from core.helper.model_provider_cache import ProviderCredentialsCache, ProviderCredentialsCacheType
from core.model_manager import LBModelManager
from core.model_runtime.entities.model_entities import ModelType
from core.model_runtime.entities.provider_entities import (
ModelCredentialSchema,
ProviderCredentialSchema,
)
from core.model_runtime.model_providers import model_provider_factory
from core.provider_manager import ProviderManager
from extensions.ext_database import db
from models.provider import LoadBalancingModelConfig
logger = logging.getLogger(__name__)
class ModelLoadBalancingService:
def __init__(self) -> None:
self.provider_manager = ProviderManager()
def enable_model_load_balancing(self, tenant_id: str, provider: str, model: str, model_type: str) -> None:
"""
enable model load balancing.
:param tenant_id: workspace id
:param provider: provider name
:param model: model name
:param model_type: model type
:return:
"""
# Get all provider configurations of the current workspace
provider_configurations = self.provider_manager.get_configurations(tenant_id)
# Get provider configuration
provider_configuration = provider_configurations.get(provider)
if not provider_configuration:
raise ValueError(f"Provider {provider} does not exist.")
# Enable model load balancing
provider_configuration.enable_model_load_balancing(model=model, model_type=ModelType.value_of(model_type))
def disable_model_load_balancing(self, tenant_id: str, provider: str, model: str, model_type: str) -> None:
"""
disable model load balancing.
:param tenant_id: workspace id
:param provider: provider name
:param model: model name
:param model_type: model type
:return:
"""
# Get all provider configurations of the current workspace
provider_configurations = self.provider_manager.get_configurations(tenant_id)
# Get provider configuration
provider_configuration = provider_configurations.get(provider)
if not provider_configuration:
raise ValueError(f"Provider {provider} does not exist.")
# disable model load balancing
provider_configuration.disable_model_load_balancing(model=model, model_type=ModelType.value_of(model_type))
def get_load_balancing_configs(
self, tenant_id: str, provider: str, model: str, model_type: str
) -> tuple[bool, list[dict]]:
"""
Get load balancing configurations.
:param tenant_id: workspace id
:param provider: provider name
:param model: model name
:param model_type: model type
:return:
"""
# Get all provider configurations of the current workspace
provider_configurations = self.provider_manager.get_configurations(tenant_id)
# Get provider configuration
provider_configuration = provider_configurations.get(provider)
if not provider_configuration:
raise ValueError(f"Provider {provider} does not exist.")
# Convert model type to ModelType
model_type = ModelType.value_of(model_type)
# Get provider model setting
provider_model_setting = provider_configuration.get_provider_model_setting(
model_type=model_type,
model=model,
)
is_load_balancing_enabled = False
if provider_model_setting and provider_model_setting.load_balancing_enabled:
is_load_balancing_enabled = True
# Get load balancing configurations
load_balancing_configs = (
db.session.query(LoadBalancingModelConfig)
.filter(
LoadBalancingModelConfig.tenant_id == tenant_id,
LoadBalancingModelConfig.provider_name == provider_configuration.provider.provider,
LoadBalancingModelConfig.model_type == model_type.to_origin_model_type(),
LoadBalancingModelConfig.model_name == model,
)
.order_by(LoadBalancingModelConfig.created_at)
.all()
)
if provider_configuration.custom_configuration.provider:
# check if the inherit configuration exists,
# inherit is represented for the provider or model custom credentials
inherit_config_exists = False
for load_balancing_config in load_balancing_configs:
if load_balancing_config.name == "__inherit__":
inherit_config_exists = True
break
if not inherit_config_exists:
# Initialize the inherit configuration
inherit_config = self._init_inherit_config(tenant_id, provider, model, model_type)
# prepend the inherit configuration
load_balancing_configs.insert(0, inherit_config)
else:
# move the inherit configuration to the first
for i, load_balancing_config in enumerate(load_balancing_configs[:]):
if load_balancing_config.name == "__inherit__":
inherit_config = load_balancing_configs.pop(i)
load_balancing_configs.insert(0, inherit_config)
# Get credential form schemas from model credential schema or provider credential schema
credential_schemas = self._get_credential_schema(provider_configuration)
# Get decoding rsa key and cipher for decrypting credentials
decoding_rsa_key, decoding_cipher_rsa = encrypter.get_decrypt_decoding(tenant_id)
# fetch status and ttl for each config
datas = []
for load_balancing_config in load_balancing_configs:
in_cooldown, ttl = LBModelManager.get_config_in_cooldown_and_ttl(
tenant_id=tenant_id,
provider=provider,
model=model,
model_type=model_type,
config_id=load_balancing_config.id,
)
try:
if load_balancing_config.encrypted_config:
credentials = json.loads(load_balancing_config.encrypted_config)
else:
credentials = {}
except JSONDecodeError:
credentials = {}
# Get provider credential secret variables
credential_secret_variables = provider_configuration.extract_secret_variables(
credential_schemas.credential_form_schemas
)
# decrypt credentials
for variable in credential_secret_variables:
if variable in credentials:
try:
credentials[variable] = encrypter.decrypt_token_with_decoding(
credentials.get(variable), decoding_rsa_key, decoding_cipher_rsa
)
except ValueError:
pass
# Obfuscate credentials
credentials = provider_configuration.obfuscated_credentials(
credentials=credentials, credential_form_schemas=credential_schemas.credential_form_schemas
)
datas.append(
{
"id": load_balancing_config.id,
"name": load_balancing_config.name,
"credentials": credentials,
"enabled": load_balancing_config.enabled,
"in_cooldown": in_cooldown,
"ttl": ttl,
}
)
return is_load_balancing_enabled, datas
def get_load_balancing_config(
self, tenant_id: str, provider: str, model: str, model_type: str, config_id: str
) -> Optional[dict]:
"""
Get load balancing configuration.
:param tenant_id: workspace id
:param provider: provider name
:param model: model name
:param model_type: model type
:param config_id: load balancing config id
:return:
"""
# Get all provider configurations of the current workspace
provider_configurations = self.provider_manager.get_configurations(tenant_id)
# Get provider configuration
provider_configuration = provider_configurations.get(provider)
if not provider_configuration:
raise ValueError(f"Provider {provider} does not exist.")
# Convert model type to ModelType
model_type = ModelType.value_of(model_type)
# Get load balancing configurations
load_balancing_model_config = (
db.session.query(LoadBalancingModelConfig)
.filter(
LoadBalancingModelConfig.tenant_id == tenant_id,
LoadBalancingModelConfig.provider_name == provider_configuration.provider.provider,
LoadBalancingModelConfig.model_type == model_type.to_origin_model_type(),
LoadBalancingModelConfig.model_name == model,
LoadBalancingModelConfig.id == config_id,
)
.first()
)
if not load_balancing_model_config:
return None
try:
if load_balancing_model_config.encrypted_config:
credentials = json.loads(load_balancing_model_config.encrypted_config)
else:
credentials = {}
except JSONDecodeError:
credentials = {}
# Get credential form schemas from model credential schema or provider credential schema
credential_schemas = self._get_credential_schema(provider_configuration)
# Obfuscate credentials
credentials = provider_configuration.obfuscated_credentials(
credentials=credentials, credential_form_schemas=credential_schemas.credential_form_schemas
)
return {
"id": load_balancing_model_config.id,
"name": load_balancing_model_config.name,
"credentials": credentials,
"enabled": load_balancing_model_config.enabled,
}
def _init_inherit_config(
self, tenant_id: str, provider: str, model: str, model_type: ModelType
) -> LoadBalancingModelConfig:
"""
Initialize the inherit configuration.
:param tenant_id: workspace id
:param provider: provider name
:param model: model name
:param model_type: model type
:return:
"""
# Initialize the inherit configuration
inherit_config = LoadBalancingModelConfig(
tenant_id=tenant_id,
provider_name=provider,
model_type=model_type.to_origin_model_type(),
model_name=model,
name="__inherit__",
)
db.session.add(inherit_config)
db.session.commit()
return inherit_config
def update_load_balancing_configs(
self, tenant_id: str, provider: str, model: str, model_type: str, configs: list[dict]
) -> None:
"""
Update load balancing configurations.
:param tenant_id: workspace id
:param provider: provider name
:param model: model name
:param model_type: model type
:param configs: load balancing configs
:return:
"""
# Get all provider configurations of the current workspace
provider_configurations = self.provider_manager.get_configurations(tenant_id)
# Get provider configuration
provider_configuration = provider_configurations.get(provider)
if not provider_configuration:
raise ValueError(f"Provider {provider} does not exist.")
# Convert model type to ModelType
model_type = ModelType.value_of(model_type)
if not isinstance(configs, list):
raise ValueError("Invalid load balancing configs")
current_load_balancing_configs = (
db.session.query(LoadBalancingModelConfig)
.filter(
LoadBalancingModelConfig.tenant_id == tenant_id,
LoadBalancingModelConfig.provider_name == provider_configuration.provider.provider,
LoadBalancingModelConfig.model_type == model_type.to_origin_model_type(),
LoadBalancingModelConfig.model_name == model,
)
.all()
)
# id as key, config as value
current_load_balancing_configs_dict = {config.id: config for config in current_load_balancing_configs}
updated_config_ids = set()
for config in configs:
if not isinstance(config, dict):
raise ValueError("Invalid load balancing config")
config_id = config.get("id")
name = config.get("name")
credentials = config.get("credentials")
enabled = config.get("enabled")
if not name:
raise ValueError("Invalid load balancing config name")
if enabled is None:
raise ValueError("Invalid load balancing config enabled")
# is config exists
if config_id:
config_id = str(config_id)
if config_id not in current_load_balancing_configs_dict:
raise ValueError("Invalid load balancing config id: {}".format(config_id))
updated_config_ids.add(config_id)
load_balancing_config = current_load_balancing_configs_dict[config_id]
# check duplicate name
for current_load_balancing_config in current_load_balancing_configs:
if current_load_balancing_config.id != config_id and current_load_balancing_config.name == name:
raise ValueError("Load balancing config name {} already exists".format(name))
if credentials:
if not isinstance(credentials, dict):
raise ValueError("Invalid load balancing config credentials")
# validate custom provider config
credentials = self._custom_credentials_validate(
tenant_id=tenant_id,
provider_configuration=provider_configuration,
model_type=model_type,
model=model,
credentials=credentials,
load_balancing_model_config=load_balancing_config,
validate=False,
)
# update load balancing config
load_balancing_config.encrypted_config = json.dumps(credentials)
load_balancing_config.name = name
load_balancing_config.enabled = enabled
load_balancing_config.updated_at = datetime.datetime.now(datetime.timezone.utc).replace(tzinfo=None)
db.session.commit()
self._clear_credentials_cache(tenant_id, config_id)
else:
# create load balancing config
if name == "__inherit__":
raise ValueError("Invalid load balancing config name")
# check duplicate name
for current_load_balancing_config in current_load_balancing_configs:
if current_load_balancing_config.name == name:
raise ValueError("Load balancing config name {} already exists".format(name))
if not credentials:
raise ValueError("Invalid load balancing config credentials")
if not isinstance(credentials, dict):
raise ValueError("Invalid load balancing config credentials")
# validate custom provider config
credentials = self._custom_credentials_validate(
tenant_id=tenant_id,
provider_configuration=provider_configuration,
model_type=model_type,
model=model,
credentials=credentials,
validate=False,
)
# create load balancing config
load_balancing_model_config = LoadBalancingModelConfig(
tenant_id=tenant_id,
provider_name=provider_configuration.provider.provider,
model_type=model_type.to_origin_model_type(),
model_name=model,
name=name,
encrypted_config=json.dumps(credentials),
)
db.session.add(load_balancing_model_config)
db.session.commit()
# get deleted config ids
deleted_config_ids = set(current_load_balancing_configs_dict.keys()) - updated_config_ids
for config_id in deleted_config_ids:
db.session.delete(current_load_balancing_configs_dict[config_id])
db.session.commit()
self._clear_credentials_cache(tenant_id, config_id)
def validate_load_balancing_credentials(
self,
tenant_id: str,
provider: str,
model: str,
model_type: str,
credentials: dict,
config_id: Optional[str] = None,
) -> None:
"""
Validate load balancing credentials.
:param tenant_id: workspace id
:param provider: provider name
:param model_type: model type
:param model: model name
:param credentials: credentials
:param config_id: load balancing config id
:return:
"""
# Get all provider configurations of the current workspace
provider_configurations = self.provider_manager.get_configurations(tenant_id)
# Get provider configuration
provider_configuration = provider_configurations.get(provider)
if not provider_configuration:
raise ValueError(f"Provider {provider} does not exist.")
# Convert model type to ModelType
model_type = ModelType.value_of(model_type)
load_balancing_model_config = None
if config_id:
# Get load balancing config
load_balancing_model_config = (
db.session.query(LoadBalancingModelConfig)
.filter(
LoadBalancingModelConfig.tenant_id == tenant_id,
LoadBalancingModelConfig.provider_name == provider,
LoadBalancingModelConfig.model_type == model_type.to_origin_model_type(),
LoadBalancingModelConfig.model_name == model,
LoadBalancingModelConfig.id == config_id,
)
.first()
)
if not load_balancing_model_config:
raise ValueError(f"Load balancing config {config_id} does not exist.")
# Validate custom provider config
self._custom_credentials_validate(
tenant_id=tenant_id,
provider_configuration=provider_configuration,
model_type=model_type,
model=model,
credentials=credentials,
load_balancing_model_config=load_balancing_model_config,
)
def _custom_credentials_validate(
self,
tenant_id: str,
provider_configuration: ProviderConfiguration,
model_type: ModelType,
model: str,
credentials: dict,
load_balancing_model_config: Optional[LoadBalancingModelConfig] = None,
validate: bool = True,
) -> dict:
"""
Validate custom credentials.
:param tenant_id: workspace id
:param provider_configuration: provider configuration
:param model_type: model type
:param model: model name
:param credentials: credentials
:param load_balancing_model_config: load balancing model config
:param validate: validate credentials
:return:
"""
# Get credential form schemas from model credential schema or provider credential schema
credential_schemas = self._get_credential_schema(provider_configuration)
# Get provider credential secret variables
provider_credential_secret_variables = provider_configuration.extract_secret_variables(
credential_schemas.credential_form_schemas
)
if load_balancing_model_config:
try:
# fix origin data
if load_balancing_model_config.encrypted_config:
original_credentials = json.loads(load_balancing_model_config.encrypted_config)
else:
original_credentials = {}
except JSONDecodeError:
original_credentials = {}
# encrypt credentials
for key, value in credentials.items():
if key in provider_credential_secret_variables:
# if send [__HIDDEN__] in secret input, it will be same as original value
if value == HIDDEN_VALUE and key in original_credentials:
credentials[key] = encrypter.decrypt_token(tenant_id, original_credentials[key])
if validate:
if isinstance(credential_schemas, ModelCredentialSchema):
credentials = model_provider_factory.model_credentials_validate(
provider=provider_configuration.provider.provider,
model_type=model_type,
model=model,
credentials=credentials,
)
else:
credentials = model_provider_factory.provider_credentials_validate(
provider=provider_configuration.provider.provider, credentials=credentials
)
for key, value in credentials.items():
if key in provider_credential_secret_variables:
credentials[key] = encrypter.encrypt_token(tenant_id, value)
return credentials
def _get_credential_schema(
self, provider_configuration: ProviderConfiguration
) -> ModelCredentialSchema | ProviderCredentialSchema:
"""
Get form schemas.
:param provider_configuration: provider configuration
:return:
"""
# Get credential form schemas from model credential schema or provider credential schema
if provider_configuration.provider.model_credential_schema:
credential_schema = provider_configuration.provider.model_credential_schema
else:
credential_schema = provider_configuration.provider.provider_credential_schema
return credential_schema
def _clear_credentials_cache(self, tenant_id: str, config_id: str) -> None:
"""
Clear credentials cache.
:param tenant_id: workspace id
:param config_id: load balancing config id
:return:
"""
provider_model_credentials_cache = ProviderCredentialsCache(
tenant_id=tenant_id, identity_id=config_id, cache_type=ProviderCredentialsCacheType.LOAD_BALANCING_MODEL
)
provider_model_credentials_cache.delete()
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