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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 14:31:17 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 14:31:17 +0000 |
commit | 8020f71afd34d7696d7933659df2d763ab05542f (patch) | |
tree | 2fdf1b5447ffd8bdd61e702ca183e814afdcb4fc /collectors/python.d.plugin/python_modules/bases/FrameworkServices/LogService.py | |
parent | Initial commit. (diff) | |
download | netdata-upstream.tar.xz netdata-upstream.zip |
Adding upstream version 1.37.1.upstream/1.37.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'collectors/python.d.plugin/python_modules/bases/FrameworkServices/LogService.py')
-rw-r--r-- | collectors/python.d.plugin/python_modules/bases/FrameworkServices/LogService.py | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/collectors/python.d.plugin/python_modules/bases/FrameworkServices/LogService.py b/collectors/python.d.plugin/python_modules/bases/FrameworkServices/LogService.py new file mode 100644 index 0000000..a55e33f --- /dev/null +++ b/collectors/python.d.plugin/python_modules/bases/FrameworkServices/LogService.py @@ -0,0 +1,82 @@ +# -*- coding: utf-8 -*- +# Description: +# Author: Pawel Krupa (paulfantom) +# Author: Ilya Mashchenko (ilyam8) +# SPDX-License-Identifier: GPL-3.0-or-later + +from glob import glob +import sys +import os + +from bases.FrameworkServices.SimpleService import SimpleService + + +class LogService(SimpleService): + def __init__(self, configuration=None, name=None): + SimpleService.__init__(self, configuration=configuration, name=name) + self.log_path = self.configuration.get('path') + self.__glob_path = self.log_path + self._last_position = 0 + self.__re_find = dict(current=0, run=0, maximum=60) + self.__open_args = {'errors': 'replace'} if sys.version_info[0] > 2 else {} + + def _get_raw_data(self): + """ + Get log lines since last poll + :return: list + """ + lines = list() + try: + if self.__re_find['current'] == self.__re_find['run']: + self._find_recent_log_file() + size = os.path.getsize(self.log_path) + if size == self._last_position: + self.__re_find['current'] += 1 + return list() # return empty list if nothing has changed + elif size < self._last_position: + self._last_position = 0 # read from beginning if file has shrunk + + with open(self.log_path, **self.__open_args) as fp: + fp.seek(self._last_position) + for line in fp: + lines.append(line) + self._last_position = fp.tell() + self.__re_find['current'] = 0 + except (OSError, IOError) as error: + self.__re_find['current'] += 1 + self.error(str(error)) + + return lines or None + + def _find_recent_log_file(self): + """ + :return: + """ + self.__re_find['run'] = self.__re_find['maximum'] + self.__re_find['current'] = 0 + self.__glob_path = self.__glob_path or self.log_path # workaround for modules w/o config files + path_list = glob(self.__glob_path) + if path_list: + self.log_path = max(path_list) + return True + return False + + def check(self): + """ + Parse basic configuration and check if log file exists + :return: boolean + """ + if not self.log_path: + self.error('No path to log specified') + return None + + if self._find_recent_log_file() and os.access(self.log_path, os.R_OK) and os.path.isfile(self.log_path): + return True + self.error('Cannot access {0}'.format(self.log_path)) + return False + + def create(self): + # set cursor at last byte of log file + self._last_position = os.path.getsize(self.log_path) + status = SimpleService.create(self) + return status |