def _detect_protocol(self, protocols): """ Probe protocol endpoints in turn. """ self.clear_protocol() for retry in range(0, MAX_RETRY): for protocol_name in protocols: try: protocol = self._detect_wire_protocol() \ if protocol_name == "WireProtocol" \ else self._detect_metadata_protocol() IOErrorCounter.set_protocol_endpoint( endpoint=protocol.endpoint) return protocol except ProtocolError as e: logger.info("Protocol endpoint not found: {0}, {1}", protocol_name, e) if retry < MAX_RETRY - 1: logger.info("Retry detect protocols: retry={0}", retry) time.sleep(PROBE_INTERVAL) raise ProtocolNotFoundError("No protocol found.")
def _get_protocol(self): """ Get protocol instance based on previous detecting result. """ protocol_file_path = self._get_protocol_file_path() if not os.path.isfile(protocol_file_path): raise ProtocolNotFoundError("No protocol found") protocol_name = fileutil.read_file(protocol_file_path) if protocol_name == prots.WireProtocol: endpoint = self._get_wireserver_endpoint() return WireProtocol(endpoint) elif protocol_name == prots.MetadataProtocol: return MetadataProtocol() else: raise ProtocolNotFoundError(("Unknown protocol: {0}" "").format(protocol_name))
def _get_protocol(self): """ Get protocol instance based on previous detecting result. """ protocol_file_path = os.path.join(conf.get_lib_dir(), PROTOCOL_FILE_NAME) if not os.path.isfile(protocol_file_path): raise ProtocolNotFoundError("No protocol found") protocol_name = fileutil.read_file(protocol_file_path) if protocol_name == "WireProtocol": endpoint = self._get_wireserver_endpoint() return WireProtocol(endpoint) elif protocol_name == "MetadataProtocol": return MetadataProtocol() else: raise ProtocolNotFoundError(("Unknown protocol: {0}" "").format(protocol_name))
def _detect_protocol(self): """ Probe protocol endpoints in turn. """ self.clear_protocol() for retry in range(0, MAX_RETRY): try: endpoint = self.dhcp_handler.endpoint if endpoint is None: # pylint: disable=W0105 ''' Check if DHCP can be used to get the wire protocol endpoint ''' # pylint: enable=W0105 dhcp_available = self.osutil.is_dhcp_available() if dhcp_available: logger.info( "WireServer endpoint is not found. Rerun dhcp handler" ) try: self.dhcp_handler.run() except DhcpError as e: raise ProtocolError(ustr(e)) endpoint = self.dhcp_handler.endpoint else: logger.info("_detect_protocol: DHCP not available") endpoint = self.get_wireserver_endpoint() try: protocol = WireProtocol(endpoint) protocol.detect() self._set_wireserver_endpoint(endpoint) return protocol except ProtocolError as e: logger.info( "WireServer is not responding. Reset dhcp endpoint") self.dhcp_handler.endpoint = None self.dhcp_handler.skip_cache = True raise e except ProtocolError as e: logger.info("Protocol endpoint not found: {0}", e) if retry < MAX_RETRY - 1: logger.info("Retry detect protocol: retry={0}", retry) time.sleep(PROBE_INTERVAL) raise ProtocolNotFoundError("No protocol found.")
def check_wire_protocol_version(self): uri = VERSION_INFO_URI.format(self.endpoint) version_info_xml = self.fetch_config(uri, None) version_info = VersionInfo(version_info_xml) preferred = version_info.get_preferred() if PROTOCOL_VERSION == preferred: logger.info("Wire protocol version:{0}", PROTOCOL_VERSION) elif PROTOCOL_VERSION in version_info.get_supported(): logger.info("Wire protocol version:{0}", PROTOCOL_VERSION) logger.warn("Server prefered version:{0}", preferred) else: error = ("Agent supported wire protocol version: {0} was not " "advised by Fabric.").format(PROTOCOL_VERSION) raise ProtocolNotFoundError(error)
def _detect_protocol(self, protocols): """ Probe protocol endpoints in turn. """ self.clear_protocol() for retry in range(0, MAX_RETRY): for protocol in protocols: try: if protocol == "WireProtocol": return self._detect_wire_protocol() if protocol == "MetadataProtocol": return self._detect_metadata_protocol() except ProtocolError as e: logger.info("Protocol endpoint not found: {0}, {1}", protocol, e) if retry < MAX_RETRY - 1: logger.info("Retry detect protocols: retry={0}", retry) time.sleep(PROBE_INTERVAL) raise ProtocolNotFoundError("No protocol found.")