| #!/usr/bin/env python |
| |
| # Copyright 2015 The Kubernetes 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. |
| |
| import re |
| import subprocess |
| |
| from time import sleep |
| |
| |
| def get_version(bin_name): |
| """Get the version of an installed Kubernetes binary. |
| |
| :param str bin_name: Name of binary |
| :return: 3-tuple version (maj, min, patch) |
| |
| Example:: |
| |
| >>> `get_version('kubelet') |
| (1, 6, 0) |
| |
| """ |
| cmd = '{} --version'.format(bin_name).split() |
| version_string = subprocess.check_output(cmd).decode('utf-8') |
| return tuple(int(q) for q in re.findall("[0-9]+", version_string)[:3]) |
| |
| |
| def retry(times, delay_secs): |
| """ Decorator for retrying a method call. |
| |
| Args: |
| times: How many times should we retry before giving up |
| delay_secs: Delay in secs |
| |
| Returns: A callable that would return the last call outcome |
| """ |
| |
| def retry_decorator(func): |
| """ Decorator to wrap the function provided. |
| |
| Args: |
| func: Provided function should return either True od False |
| |
| Returns: A callable that would return the last call outcome |
| |
| """ |
| def _wrapped(*args, **kwargs): |
| res = func(*args, **kwargs) |
| attempt = 0 |
| while not res and attempt < times: |
| sleep(delay_secs) |
| res = func(*args, **kwargs) |
| if res: |
| break |
| attempt += 1 |
| return res |
| return _wrapped |
| |
| return retry_decorator |
