fix session_ttl passing

llama_stack/providers/adapters/safety/together/together.py

@@ -43,11 +43,11 @@ class TogetherSafetyImpl(Safety, NeedsRequestProviderData, ShieldsProtocolPrivat
         ]
 
     async def run_shield(
-        self, shield_type: str, messages: List[Message], params: Dict[str, Any] = None
+        self, identifier: str, messages: List[Message], params: Dict[str, Any] = None
     ) -> RunShieldResponse:
-        shield_def = await self.shield_store.get_shield(shield_type)
+        shield_def = await self.shield_store.get_shield(identifier)
         if not shield_def:
-            raise ValueError(f"Unknown shield {shield_type}")
+            raise ValueError(f"Unknown shield {identifier}")
 
         model = shield_def.params.get("model", "llama_guard")
         if model not in TOGETHER_SHIELD_MODEL_MAP:

llama_stack/providers/registry/inference.py

@@ -124,7 +124,7 @@ def available_providers() -> List[ProviderSpec]:
             api=Api.inference,
             adapter=AdapterSpec(
                 adapter_type="bedrock",
-                pip_packages=["boto3", "pytz"],
+                pip_packages=["boto3"],
                 module="llama_stack.providers.adapters.inference.bedrock",
                 config_class="llama_stack.providers.adapters.inference.bedrock.BedrockConfig",
             ),

llama_stack/providers/registry/safety.py

@@ -43,7 +43,7 @@ def available_providers() -> List[ProviderSpec]:
             api=Api.safety,
             adapter=AdapterSpec(
                 adapter_type="bedrock",
-                pip_packages=["boto3", "pytz"],
+                pip_packages=["boto3"],
                 module="llama_stack.providers.adapters.safety.bedrock",
                 config_class="llama_stack.providers.adapters.safety.bedrock.BedrockSafetyConfig",
             ),

llama_stack/providers/utils/bedrock/client.py

@@ -56,6 +56,7 @@ def create_bedrock_client(
             "aws_session_token": config.aws_session_token,
             "region_name": config.region_name,
             "profile_name": config.profile_name,
+            "session_ttl": config.session_ttl,
         }
 
         # Remove None values
@@ -66,7 +67,9 @@ def create_bedrock_client(
     else:
         return (
             RefreshableBotoSession(
-                region_name=config.region_name, profile_name=config.profile_name
+                region_name=config.region_name,
+                profile_name=config.profile_name,
+                session_ttl=config.session_ttl,
             )
             .refreshable_session()
             .client(service_name)

llama_stack/providers/utils/bedrock/config.py

@@ -53,3 +53,7 @@ class BedrockBaseConfig(BaseModel):
         description="The time in seconds till a timeout exception is thrown when attempting to read from a connection."
         "The default is 60 seconds.",
     )
+    session_ttl: Optional[int] = Field(
+        default=3600,
+        description="The time in seconds till a session expires. The default is 3600 seconds (1 hour).",
+    )

llama_stack/providers/utils/bedrock/refreshable_boto_session.py

@@ -4,11 +4,10 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
-from datetime import datetime
+import datetime
 from time import time
 from uuid import uuid4
 
-import pytz
 from boto3 import Session
 from botocore.credentials import RefreshableCredentials
 from botocore.session import get_session
@@ -90,9 +89,9 @@ class RefreshableBotoSession:
                 "access_key": session_credentials.access_key,
                 "secret_key": session_credentials.secret_key,
                 "token": session_credentials.token,
-                "expiry_time": datetime.fromtimestamp(time() + self.session_ttl)
+                "expiry_time": datetime.datetime.fromtimestamp(
-                .replace(tzinfo=pytz.utc)
+                    time() + self.session_ttl, datetime.timezone.utc
-                .isoformat(),
+                ).isoformat(),
             }
 
         return credentials