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Diffstat (limited to 'compass-tasks/hdsdiscovery/hdmanager.py')
| -rw-r--r-- | compass-tasks/hdsdiscovery/hdmanager.py | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/compass-tasks/hdsdiscovery/hdmanager.py b/compass-tasks/hdsdiscovery/hdmanager.py new file mode 100644 index 0000000..028d444 --- /dev/null +++ b/compass-tasks/hdsdiscovery/hdmanager.py @@ -0,0 +1,171 @@ +# Copyright 2014 Huawei Technologies Co. Ltd +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +"""Manage hdsdiscovery functionalities.""" +import logging +import os +import re + +from compass.hdsdiscovery.error import TimeoutError +from compass.hdsdiscovery import utils +from compass.utils import setting_wrapper as setting +from compass.utils import util + + +UNREACHABLE = 'unreachable' +NOTSUPPORTED = 'notsupported' +ERROR = 'error' +REPOLLING = 'repolling' + + +class HDManager(object): + """Process a request.""" + + def __init__(self): + base_dir = os.path.dirname(os.path.realpath(__file__)) + self.vendors_dir = os.path.join(base_dir, 'vendors') + self.vendor_plugins_dir = os.path.join(self.vendors_dir, '?/plugins') + self.snmp_sysdescr = 'sysDescr.0' + + def learn(self, host, credential, vendor, req_obj, oper="SCAN", **kwargs): + """Insert/update record of switch_info. + + Get expected results from switch according to sepcific operation. + + :param req_obj: the object of a machine + :param host: switch IP address + :param credientials: credientials to access switch + :param oper: operations of the plugin (SCAN, GETONE, SET) + :param kwargs(optional): key-value pairs + """ + plugin_dir = self.vendor_plugins_dir.replace('?', vendor) + if not os.path.exists(plugin_dir): + logging.error('No such directory: %s', plugin_dir) + return None + + plugin = utils.load_module(req_obj, plugin_dir, host, credential) + if not plugin: + # No plugin found! + # TODO(Grace): add more code to catch excpetion or unexpected state + logging.error('no plugin %s to load from %s', req_obj, plugin_dir) + return None + + return plugin.process_data(oper, **kwargs) + + def is_valid_vendor(self, host, credential, vendor): + """Check if vendor is associated with this host and credential + + :param host: switch ip + :param credential: credential to access switch + :param vendor: the vendor of switch + """ + vendor_dir = os.path.join(self.vendors_dir, vendor) + if not os.path.exists(vendor_dir): + logging.error('no such directory: %s', vendor_dir) + return False + + sys_info, err = self.get_sys_info(host, credential) + if not sys_info: + logging.debug("[hdsdiscovery][hdmanager][is_valid_vendor]" + "failded to get sys information: %s", err) + return False + + instance = utils.load_module(vendor, vendor_dir) + if not instance: + logging.debug("[hdsdiscovery][hdmanager][is_valid_vendor]" + "No such vendor found!") + return False + + if instance.is_this_vendor(sys_info): + logging.info("[hdsdiscovery][hdmanager][is_valid_vendor]" + "vendor %s is correct!", vendor) + return True + + return False + + def get_vendor(self, host, credential): + """Check and get vendor of the switch. + + :param host: switch ip: + :param credential: credential to access switch + :return a tuple (vendor, switch_state, error) + """ + + switch_lists = util.load_configs(setting.MACHINE_LIST_DIR) + switch_list = [] + for items in switch_lists: + for item in items['MACHINE_LIST']: + for k, v in item.items(): + switch_list.append(k) + if host in switch_list: + return ("appliance", "Found", "") + + # TODO(grace): Why do we need to have valid IP? + # a hostname should also work. + if not utils.valid_ip_format(host): + logging.error("host '%s' is not valid IP address!", host) + return (None, ERROR, "Invalid IP address %s!" % host) + + if not utils.is_valid_snmp_v2_credential(credential): + logging.debug("******The credential %s of host %s cannot " + "be used for either SNMP v2 or SSH*****", + credential, host) + return (None, ERROR, "Invalid credential") + + sys_info, err = self.get_sys_info(host, credential) + if not sys_info: + return (None, UNREACHABLE, err) + + # List all vendors in vendors directory -- a directory but hidden + # under ../vendors + all_vendors = [o for o in os.listdir(self.vendors_dir) + if os.path.isdir(os.path.join(self.vendors_dir, o)) + and re.match(r'^[^\.]', o)] + + logging.debug("[get_vendor][available vendors]: %s ", all_vendors) + logging.debug("[get_vendor] System Information is [%s]", sys_info) + + # TODO(grace): should not conver to lower. The vendor impl can choose + # to do case-insensitive match + # sys_info = sys_info.lower() + vendor = None + for vname in all_vendors: + vpath = os.path.join(self.vendors_dir, vname) + instance = utils.load_module(vname, vpath) + if not instance: + logging.error('no instance %s load from %s', vname, vpath) + continue + + if instance.is_this_vendor(sys_info): + logging.info("[get_vendor]****Found vendor '%s'****", vname) + vendor = vname + break + + if not vendor: + logging.debug("[get_vendor] No vendor found! <==================") + return (None, NOTSUPPORTED, "Not supported switch vendor!") + + return (vendor, REPOLLING, "") + + def get_sys_info(self, host, credential): + """get sys info.""" + sys_info = None + try: + sys_info = utils.snmpget_by_cl(host, + credential, + self.snmp_sysdescr) + except TimeoutError as error: + return (None, error.message) + + return (sys_info, "") |