# Copyright 2021 The KubeEdge Authors.
#
# 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.
"""This script contains some common tools."""
import socket
from functools import wraps
[docs]def get_host_ip():
"""Get local ip address."""
ip = '127.0.0.1'
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
try:
s.connect(("8.8.8.8", 80))
ip = s.getsockname()[0]
except Exception:
pass
finally:
s.close()
return ip
[docs]def singleton(cls):
"""Set class to singleton class.
:param cls: class
:return: instance
"""
__instances__ = {}
@wraps(cls)
def get_instance(*args, **kw):
"""Get class instance and save it into glob list."""
if cls not in __instances__:
__instances__[cls] = cls(*args, **kw)
return __instances__[cls]
return get_instance