mirror of
https://github.com/meta-llama/llama-stack.git
synced 2025-10-15 14:43:48 +00:00
108 lines
3.7 KiB
Python
108 lines
3.7 KiB
Python
# Copyright (c) Meta Platforms, Inc. and affiliates.
|
|
# All rights reserved.
|
|
#
|
|
# This source code is licensed under the terms described in the LICENSE file in
|
|
# the root directory of this source tree.
|
|
|
|
import os
|
|
from datetime import datetime
|
|
from time import time
|
|
|
|
import pytz
|
|
from boto3 import Session
|
|
from botocore.credentials import RefreshableCredentials
|
|
from botocore.session import get_session
|
|
|
|
|
|
class RefreshableBotoSession:
|
|
"""
|
|
Boto Helper class which lets us create a refreshable session so that we can cache the client or resource.
|
|
|
|
Usage
|
|
-----
|
|
session = RefreshableBotoSession().refreshable_session()
|
|
|
|
client = session.client("bedrock-runtime") # we now can cache this client object without worrying about expiring credentials
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
region_name: str = None,
|
|
profile_name: str = None,
|
|
session_ttl: int = 30000,
|
|
):
|
|
"""
|
|
Initialize `RefreshableBotoSession`
|
|
|
|
Parameters
|
|
----------
|
|
region_name : str (optional)
|
|
Default region when creating a new connection. Will check AWS_REGION or AWS_DEFAULT_REGION env vars if not provided.
|
|
|
|
profile_name : str (optional)
|
|
The name of a profile to use. Will check environment variables before using profile.
|
|
"""
|
|
# Check environment variables for region
|
|
self.region_name = (
|
|
region_name
|
|
or os.environ.get("AWS_REGION")
|
|
or os.environ.get("AWS_DEFAULT_REGION")
|
|
)
|
|
self.profile_name = profile_name
|
|
self.session_ttl = session_ttl
|
|
|
|
def __get_session_credentials(self):
|
|
"""
|
|
Get session credentials from environment variables or session
|
|
"""
|
|
# Check for credentials in environment variables first
|
|
if all(
|
|
key in os.environ for key in ["AWS_ACCESS_KEY_ID", "AWS_SECRET_ACCESS_KEY"]
|
|
):
|
|
expiry_time = (
|
|
os.environ.get("EXPIRY_TIME")
|
|
or datetime.fromtimestamp(time() + self.session_ttl)
|
|
.replace(tzinfo=pytz.utc)
|
|
.isoformat()
|
|
)
|
|
credentials = {
|
|
"access_key": os.environ["AWS_ACCESS_KEY_ID"],
|
|
"secret_key": os.environ["AWS_SECRET_ACCESS_KEY"],
|
|
"token": os.environ.get("AWS_SESSION_TOKEN"), # Optional
|
|
"expiry_time": expiry_time,
|
|
}
|
|
return credentials
|
|
|
|
# Fall back to profile-based credentials
|
|
session = Session(region_name=self.region_name, profile_name=self.profile_name)
|
|
|
|
session_credentials = session.get_credentials().get_frozen_credentials()
|
|
credentials = {
|
|
"access_key": session_credentials.access_key,
|
|
"secret_key": session_credentials.secret_key,
|
|
"token": session_credentials.token,
|
|
"expiry_time": datetime.fromtimestamp(time() + self.session_ttl)
|
|
.replace(tzinfo=pytz.utc)
|
|
.isoformat(),
|
|
}
|
|
|
|
return credentials
|
|
|
|
def refreshable_session(self) -> Session:
|
|
"""
|
|
Get refreshable boto3 session.
|
|
"""
|
|
# Get refreshable credentials
|
|
refreshable_credentials = RefreshableCredentials.create_from_metadata(
|
|
metadata=self.__get_session_credentials(),
|
|
refresh_using=self.__get_session_credentials,
|
|
method="sts-assume-role",
|
|
)
|
|
|
|
# attach refreshable credentials current session
|
|
session = get_session()
|
|
session._credentials = refreshable_credentials
|
|
session.set_config_variable("region", self.region_name)
|
|
autorefresh_session = Session(botocore_session=session)
|
|
|
|
return autorefresh_session
|