def _check_version_header(self):
if "x-ms-version" not in self._headers:
versions = self._get_versions()
if WIRE_SERVER_VERSION not in versions.Versions.Supported.Version:
raise exception.MetadaNotFoundException(
"Unsupported Azure WireServer version: %s" %
WIRE_SERVER_VERSION)
self._headers["x-ms-version"] = WIRE_SERVER_VERSION
def get_metadata_service():
# Return the first service that loads correctly
cl = classloader.ClassLoader()
for class_path in CONF.metadata_services:
service = cl.load_class(class_path)()
try:
if service.load():
return service
except Exception as ex:
LOG.error("Failed to load metadata service '%s'" % class_path)
LOG.exception(ex)
raise exception.MetadaNotFoundException("No available service found")
def _get_wire_server_endpoint_address(self):
total_time = 300
poll_time = 5
retries = total_time / poll_time
while True:
try:
options = dhcp.get_dhcp_options()
endpoint = (options or {}).get(WIRESERVER_DHCP_OPTION)
if not endpoint:
raise exception.MetadaNotFoundException(
"Cannot find Azure WireServer endpoint address")
return socket.inet_ntoa(endpoint)
except Exception:
if not retries:
raise
time.sleep(poll_time)
retries -= 1