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# ============LICENSE_START=======================================================
# ONAP - SO
# ================================================================================
# Copyright (C) 2020 Huawei Technologies Co., Ltd. All rights reserved.
# ================================================================================
# 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.
# ============LICENSE_END=========================================================
import os
import logging
import json
import shutil
import conf
import ems_util
OPERATION_NAME = "swFallback"
logging.basicConfig(level=logging.INFO, format=conf.LOGGER_FORMAT, filename=ems_util.get_log_file(OPERATION_NAME))
logger = logging.getLogger(OPERATION_NAME)
def fallback(ne_info_list):
logger.info("NE info list: %s" % ne_info_list)
ne_list = []
num_failure = 0
for ne_info in ne_info_list:
if ne_info.get("status") == conf.STATUS_DOWNLOADING:
ne_info["status"] = conf.STATUS_ACTIVATED
ems_util.update_ne_info(ne_info)
ne_entry = {
"nEIdentification": ne_info["nEIdentification"],
"swFallbackStatus": "fallbackSuccessful"
}
ne_list.append(ne_entry)
continue
sw_install_dir_in_ne = ems_util.get_install_dir(ne_info['omIP'])
if ne_info.get("status") == conf.STATUS_INSTALLING:
old_sw_version = ne_info.get("currentSwVersion", "")
current_sw_version = ne_info.get("targetSwVersion", "")
else:
old_sw_version = ne_info.get("oldSwVersion", "")
current_sw_version = ne_info.get("currentSwVersion", "")
old_sw_dir = os.path.join(sw_install_dir_in_ne, old_sw_version)
if not old_sw_version or not os.path.isdir(old_sw_dir):
ne_entry = {
"nEIdentification": ne_info["nEIdentification"],
"swFallbackStatus": "fallbackUnsuccessful"
}
logger.error("oldSwVersion (%s) or oldSwDirectory (%s) is none" % (old_sw_version, old_sw_dir))
ne_list.append(ne_entry)
num_failure += 1
continue
current_sw_dir = os.path.join(sw_install_dir_in_ne, current_sw_version)
if current_sw_version and os.path.isdir(current_sw_dir) and current_sw_dir != old_sw_dir:
shutil.rmtree(current_sw_dir, ignore_errors=True)
old_cwd = os.getcwd()
os.chdir(sw_install_dir_in_ne)
if os.path.islink(conf.CURRENT_VERSION_DIR):
os.remove(conf.CURRENT_VERSION_DIR)
os.symlink(old_sw_version, conf.CURRENT_VERSION_DIR)
os.chdir(old_cwd)
installed_sw_db = os.path.join(old_sw_dir, conf.INSTALLED_SW_FILE)
if os.path.isfile(installed_sw_db):
with open(installed_sw_db) as f_installed_sw:
installed_sw_table = json.load(f_installed_sw)
if not installed_sw_table:
installed_sw_table = {}
else:
installed_sw_table = {}
ne_info["installedSw"] = installed_sw_table
if "oldSwVersion" in ne_info:
ne_info["currentSwVersion"] = ne_info["oldSwVersion"]
del ne_info["oldSwVersion"]
if "targetSwVersion" in ne_info:
del ne_info["targetSwVersion"]
if "downloadedSwLocation" in ne_info:
if os.path.isdir(ne_info["downloadedSwLocation"]):
shutil.rmtree(ne_info["downloadedSwLocation"], ignore_errors=True)
del ne_info["downloadedSwLocation"]
ne_info["status"] = conf.STATUS_ACTIVATED
ems_util.update_ne_info(ne_info)
ne_entry = {
"nEIdentification": ne_info["nEIdentification"],
"swFallbackStatus": "fallbackSuccessful"
}
ne_list.append(ne_entry)
if num_failure == 0:
result = conf.RESULT_SUCCESS
elif num_failure == len(ne_info_list):
result = conf.RESULT_FAILURE
else:
result = conf.RESULT_PARTLY
logger.info("Fallback SW result: %s" % result)
ret_value = {
"nEList": ne_list,
"result": result
}
return ret_value
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