cdist configuration management Latest manual: https://www.cdi.st/manual/latest/ Home page: https://www.cdi.st
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# -*- coding: utf-8 -*-
#
# 2010-2013 Nico Schottelius (nico-cdist at schottelius.org)
# 2019-2020 Steven Armstrong
#
# This file is part of cdist.
#
# cdist is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# cdist is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with cdist. If not, see <http://www.gnu.org/licenses/>.
#
#
import datetime
import logging
import logging.handlers
import sys
import os
import asyncio
import contextlib
import pickle
import struct
import threading
# Define additional cdist logging levels.
logging.OFF = logging.CRITICAL + 10 # disable logging
logging.addLevelName(logging.OFF, 'OFF')
logging.VERBOSE = logging.INFO - 5
logging.addLevelName(logging.VERBOSE, 'VERBOSE')
def _verbose(self, msg, *args, **kwargs):
self.log(logging.VERBOSE, msg, args, **kwargs)
logging.Logger.verbose = _verbose
logging.TRACE = logging.DEBUG - 5
logging.addLevelName(logging.TRACE, 'TRACE')
def _trace(self, msg, *args, **kwargs):
self.log(logging.TRACE, msg, *args, **kwargs)
logging.Logger.trace = _trace
class CdistFormatter(logging.Formatter):
USE_COLORS = False
RESET = '\033[0m'
COLOR_MAP = {
'ERROR': '\033[0;31m',
'WARNING': '\033[0;33m',
'INFO': '\033[0;94m',
'VERBOSE': '\033[0;34m',
'DEBUG': '\033[0;90m',
'TRACE': '\033[0;37m',
}
def __init__(self, fmt):
super().__init__(fmt=fmt)
def format(self, record):
msg = super().format(record)
if self.USE_COLORS:
color = self.COLOR_MAP.get(record.levelname)
if color:
msg = color + msg + self.RESET
return msg
class DefaultLog(logging.Logger):
FORMAT = '%(levelname)s: %(name)s: %(message)s'
class StdoutFilter(logging.Filter):
def filter(self, rec):
return rec.levelno != logging.ERROR
class StderrFilter(logging.Filter):
def filter(self, rec):
return rec.levelno == logging.ERROR
def __init__(self, name):
super().__init__(name)
self.propagate = False
if '__cdist_log_server_socket' in os.environ:
log_server_socket = os.environ['__cdist_log_server_socket']
socket_handler = logging.handlers.SocketHandler(log_server_socket,
None)
self.addHandler(socket_handler)
else:
formatter = CdistFormatter(self.FORMAT)
stdout_handler = logging.StreamHandler(sys.stdout)
stdout_handler.addFilter(self.StdoutFilter())
stdout_handler.setLevel(logging.TRACE)
stdout_handler.setFormatter(formatter)
stderr_handler = logging.StreamHandler(sys.stderr)
stderr_handler.addFilter(self.StderrFilter())
stderr_handler.setLevel(logging.ERROR)
stderr_handler.setFormatter(formatter)
self.addHandler(stdout_handler)
self.addHandler(stderr_handler)
def verbose(self, msg, *args, **kwargs):
self.log(logging.VERBOSE, msg, *args, **kwargs)
def trace(self, msg, *args, **kwargs):
self.log(logging.TRACE, msg, *args, **kwargs)
class TimestampingLog(DefaultLog):
def filter(self, record):
"""Add timestamp to messages"""
super().filter(record)
now = datetime.datetime.now()
timestamp = now.strftime("%Y%m%d%H%M%S.%f")
record.msg = "[" + timestamp + "] " + str(record.msg)
return True
class ParallelLog(DefaultLog):
FORMAT = '%(levelname)s: [%(process)d]: %(name)s: %(message)s'
class TimestampingParallelLog(TimestampingLog, ParallelLog):
pass
def setupDefaultLogging():
del logging.getLogger().handlers[:]
logging.setLoggerClass(DefaultLog)
def setupTimestampingLogging():
del logging.getLogger().handlers[:]
logging.setLoggerClass(TimestampingLog)
def setupTimestampingParallelLogging():
del logging.getLogger().handlers[:]
logging.setLoggerClass(TimestampingParallelLog)
def setupParallelLogging():
del logging.getLogger().handlers[:]
logging.setLoggerClass(ParallelLog)
async def handle_log_client(reader, writer):
while True:
chunk = await reader.read(4)
if len(chunk) < 4:
return
data_size = struct.unpack('>L', chunk)[0]
data = await reader.read(data_size)
obj = pickle.loads(data)
record = logging.makeLogRecord(obj)
logger = logging.getLogger(record.name)
logger.handle(record)
def run_log_server(server_address):
# Get a new loop inside the current thread to run the log server.
loop = asyncio.new_event_loop()
loop.create_task(asyncio.start_unix_server(handle_log_client,
server_address))
loop.run_forever()
def setupLogServer(socket_dir, log=logging.getLogger(__name__)):
"""Run a asyncio based unix socket log server in a background thread.
"""
log_server_socket = os.path.join(socket_dir, 'log-server')
log.debug('Starting logging server on: %s', log_server_socket)
os.environ['__cdist_log_server_socket_export'] = log_server_socket
with contextlib.suppress(FileNotFoundError):
os.remove(log_server_socket)
t = threading.Thread(target=run_log_server, args=(log_server_socket,))
# Deamonizing the thread means we don't have to care about stoping it.
# It will die together with the main process.
t.daemon = True
t.start()
setupDefaultLogging()