def _check_response(self, response):
"""Checks the response from GCE for error messages.
:param response: GCE response
:return: nothing
:raises: CloudProviderError with error message from GCE
"""
if "error" in response:
error = response['error']['errors'][0]['message']
raise CloudProviderError("The following error occurred while "
"interacting with the cloud provider "
"`%s`" % error)
def _connect(self):
"""
Connect to the EC2 cloud provider.
:return: :py:class:`boto.ec2.connection.EC2Connection`
:raises: Generic exception on error
"""
# check for existing connection
if self._ec2_connection:
return self._ec2_connection
try:
log.debug("Connecting to EC2 endpoint %s", self._ec2host)
# connect to webservice
ec2_connection = boto.ec2.connect_to_region(
self._region_name,
aws_access_key_id=self._access_key,
aws_secret_access_key=self._secret_key,
is_secure=self._secure,
host=self._ec2host,
port=self._ec2port,
path=self._ec2path,
)
# With the loose setting `BOTO_USE_ENDPOINT_HEURISTICS`
# which is necessary to work around issue #592, Boto will
# now accept *any* string as an AWS region name;
# furthermore, it *always* returns a connection object --
# so the only way to check that we are not going to run
# into trouble is to check that there *is* a valid host
# name on the other end of the connection.
if ec2_connection.host:
log.debug("EC2 connection has been successful.")
else:
raise CloudProviderError(
"Cannot establish connection to EC2 region {0}".format(
self._region_name))
if not self._vpc:
vpc_connection = None
self._vpc_id = None
else:
vpc_connection, self._vpc_id = self._find_vpc_by_name(
self._vpc)
except Exception as err:
log.error("Error connecting to EC2: %s", err)
raise
self._ec2_connection, self._vpc_connection = (ec2_connection,
vpc_connection)
return self._ec2_connection