Toolset to render and manage AWS CloudFormation ( )
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import os
import time
import boto3
import botocore.session
from botocore import credentials
import logging
logger = logging.getLogger(__name__)
class BotoConnection():
_sessions= {}
_clients = {}
def __init__(self, profile=None, region=None):
self.region = region
self.profile = profile
def _get_session(self, profile=None, region=None):
if self._sessions.get((profile,region)):
return self._sessions[(profile,region)]
# Construct botocore session with cache
# Setup boto to cache STS tokens for MFA
# Change the cache path from the default of ~/.aws/boto/cache to the one used by awscli
session_vars = {}
if profile:
session_vars['profile'] = (None,None,profile,None)
if region and region != 'global':
session_vars['region'] = (None,None,region,None)
session = botocore.session.Session(session_vars=session_vars)
cli_cache = os.path.join(os.path.expanduser('~'),'.aws/cli/cache')
session.get_component('credential_provider').get_provider('assume-role').cache = credentials.JSONFileCache(cli_cache)
self._sessions[(profile,region)] = session
return session
def _get_client(self, service, profile=None, region=None):
if self._clients.get((profile,region,service)):
return self._clients[(profile,region,service)]
session = self._get_session(profile,region)
client = boto3.Session(botocore_session=session).client(service)
self._clients[(profile,region,service)] = client
return client
def call(self, service, command, kwargs={}, profile=None, region=None):
while True:
client = self._get_client(service, profile, region)
return getattr(client, command)(**kwargs)
except botocore.exceptions.ClientError as e:
if e.response['Error']['Code'] == 'Throttling':
logger.warning("Throttling exception occured during {} - retry after 3s".format(command))
raise e