prometheus-pve-sd/prometheuspvesd/logger.py

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#!/usr/bin/env python3
"""Global utility methods and classes."""
import logging
import os
import sys
import colorama
from pythonjsonlogger import jsonlogger
from prometheuspvesd.utils import Singleton
from prometheuspvesd.utils import to_bool
CONSOLE_FORMAT = "{}{}[%(levelname)s]{} %(message)s"
JSON_FORMAT = "%(asctime)s %(levelname)s %(message)s"
def _should_do_markup():
py_colors = os.environ.get("PY_COLORS", None)
if py_colors is not None:
return to_bool(py_colors)
return sys.stdout.isatty() and os.environ.get("TERM") != "dumb"
colorama.init(autoreset=True, strip=not _should_do_markup())
class LogFilter(object):
"""A custom log filter which excludes log messages above the logged level."""
def __init__(self, level):
"""
Initialize a new custom log filter.
:param level: Log level limit
:returns: None
"""
self.__level = level
def filter(self, logRecord): # noqa
# https://docs.python.org/3/library/logging.html#logrecord-attributes
return logRecord.levelno <= self.__level
class SimpleFormatter(logging.Formatter):
"""Logging Formatter for simple logs."""
def format(self, record): # noqa
return logging.Formatter.format(self, record)
class MultilineFormatter(logging.Formatter):
"""Logging Formatter to reset color after newline characters."""
def format(self, record): # noqa
record.msg = record.msg.replace("\n", "\n{}... ".format(colorama.Style.RESET_ALL))
return logging.Formatter.format(self, record)
class MultilineJsonFormatter(jsonlogger.JsonFormatter):
"""Logging Formatter to remove newline characters."""
def format(self, record): # noqa
record.msg = record.msg.replace("\n", " ")
return jsonlogger.JsonFormatter.format(self, record)
class Log:
"""Handle logging."""
def __init__(self, level=logging.WARNING, name="prometheuspvesd", log_format="console"):
self.logger = logging.getLogger(name)
self.logger.setLevel(level)
self.logger.addHandler(self._get_error_handler(log_format))
self.logger.addHandler(self._get_warning_handler(log_format))
self.logger.addHandler(self._get_info_handler(log_format))
self.logger.addHandler(self._get_critical_handler(log_format))
self.logger.addHandler(self._get_debug_handler(log_format))
self.logger.propagate = False
def _get_error_handler(self, log_format):
handler = logging.StreamHandler(sys.stderr)
handler.setLevel(logging.ERROR)
handler.addFilter(LogFilter(logging.ERROR))
if log_format == "json":
handler.setFormatter(MultilineJsonFormatter(JSON_FORMAT))
elif log_format == "simple":
handler.setFormatter(SimpleFormatter())
else:
handler.setFormatter(
MultilineFormatter(
self.error(
CONSOLE_FORMAT.format(
colorama.Fore.RED, colorama.Style.BRIGHT, colorama.Style.RESET_ALL
)
)
)
)
return handler
def _get_warning_handler(self, log_format):
handler = logging.StreamHandler(sys.stdout)
handler.setLevel(logging.WARNING)
handler.addFilter(LogFilter(logging.WARNING))
if log_format == "json":
handler.setFormatter(MultilineJsonFormatter(JSON_FORMAT))
elif log_format == "simple":
handler.setFormatter(SimpleFormatter())
else:
handler.setFormatter(
MultilineFormatter(
self.warning(
CONSOLE_FORMAT.format(
colorama.Fore.YELLOW, colorama.Style.BRIGHT, colorama.Style.RESET_ALL
)
)
)
)
return handler
def _get_info_handler(self, log_format):
handler = logging.StreamHandler(sys.stdout)
handler.setLevel(logging.INFO)
handler.addFilter(LogFilter(logging.INFO))
if log_format == "json":
handler.setFormatter(MultilineJsonFormatter(JSON_FORMAT))
elif log_format == "simple":
handler.setFormatter(SimpleFormatter())
else:
handler.setFormatter(
MultilineFormatter(
self.info(
CONSOLE_FORMAT.format(
colorama.Fore.CYAN, colorama.Style.BRIGHT, colorama.Style.RESET_ALL
)
)
)
)
return handler
def _get_critical_handler(self, log_format):
handler = logging.StreamHandler(sys.stderr)
handler.setLevel(logging.CRITICAL)
handler.addFilter(LogFilter(logging.CRITICAL))
if log_format == "json":
handler.setFormatter(MultilineJsonFormatter(JSON_FORMAT))
elif log_format == "simple":
handler.setFormatter(SimpleFormatter())
else:
handler.setFormatter(
MultilineFormatter(
self.critical(
CONSOLE_FORMAT.format(
colorama.Fore.RED, colorama.Style.BRIGHT, colorama.Style.RESET_ALL
)
)
)
)
return handler
def _get_debug_handler(self, log_format):
handler = logging.StreamHandler(sys.stderr)
handler.setLevel(logging.DEBUG)
handler.addFilter(LogFilter(logging.DEBUG))
if log_format == "json":
handler.setFormatter(MultilineJsonFormatter(JSON_FORMAT))
elif log_format == "simple":
handler.setFormatter(SimpleFormatter())
else:
handler.setFormatter(
MultilineFormatter(
self.critical(
CONSOLE_FORMAT.format(
colorama.Fore.BLUE, colorama.Style.BRIGHT, colorama.Style.RESET_ALL
)
)
)
)
return handler
def update_logger(self, level=None, log_level=None):
for handler in self.logger.handlers[:]:
self.logger.removeHandler(handler)
self.logger.setLevel(level)
self.logger.addHandler(self._get_error_handler(log_level))
self.logger.addHandler(self._get_warning_handler(log_level))
self.logger.addHandler(self._get_info_handler(log_level))
self.logger.addHandler(self._get_critical_handler(log_level))
self.logger.addHandler(self._get_debug_handler(log_level))
def debug(self, msg):
"""Format info messages and return string."""
return msg
def critical(self, msg):
"""Format critical messages and return string."""
return msg
def error(self, msg):
"""Format error messages and return string."""
return msg
def warning(self, msg):
"""Format warning messages and return string."""
return msg
def info(self, msg):
"""Format info messages and return string."""
return msg
def _color_text(self, color, msg):
"""
Colorize strings.
:param color: colorama color settings
:param msg: string to colorize
:returns: string
"""
return "{}{}{}".format(color, msg, colorama.Style.RESET_ALL)
def sysexit(self, code=1):
sys.exit(code)
def sysexit_with_message(self, msg, code=1):
self.logger.critical(str(msg))
self.sysexit(code)
class SingleLog(Log, metaclass=Singleton):
"""Singleton logging class."""
pass