Source code for stacker.session_cache

from __future__ import print_function
from __future__ import division
from __future__ import absolute_import
import boto3
import logging
from .ui import ui

logger = logging.getLogger(__name__)

# A global credential cache that can be shared among boto3 sessions. This is
# inherently threadsafe thanks to the GIL:
credential_cache = {}

default_profile = None

[docs]def get_session(region, profile=None): """Creates a boto3 session with a cache Args: region (str): The region for the session profile (str): The profile for the session Returns: :class:`boto3.session.Session`: A boto3 session with credential caching """ if profile is None: logger.debug("No AWS profile explicitly provided. " "Falling back to default.") profile = default_profile logger.debug("Building session using profile \"%s\" in region \"%s\"" % (profile, region)) session = boto3.Session(region_name=region, profile_name=profile) c = session._session.get_component('credential_provider') provider = c.get_provider('assume-role') provider.cache = credential_cache provider._prompter = ui.getpass return session