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Merge branch 'log-server-new-min-py-ver' into 'master'

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Log server to capture nested logging output

See merge request ungleich-public/cdist!891
This commit is contained in:
poljakowski 2020-06-13 13:46:05 +02:00
commit 7a48b30d7a
8 changed files with 123 additions and 32 deletions
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4
cdist/__init__.py
View file

@ -26,6 +26,7 @@ import hashlib
import cdist.log
import cdist.version
VERSION = cdist.version.VERSION
BANNER = """
@ -48,6 +49,9 @@ REMOTE_EXEC = "ssh -o User=root"
REMOTE_CMDS_CLEANUP_PATTERN = "ssh -o User=root -O exit -S {}"
MIN_SUPPORTED_PYTHON_VERSION = '3.5'
class Error(Exception):
"""Base exception class for this project"""
pass

7
cdist/argparse.py
View file

@ -206,6 +206,13 @@ def get_parsers():
'supported. Without argument CPU count is used by default. '),
action='store', dest='jobs',
const=multiprocessing.cpu_count())
parser['config_main'].add_argument(
'--log-server',
action='store_true',
help=('Start a log server for sub processes to use. '
'This is mainly useful when running cdist nested '
'from a code-local script. Log server is alwasy '
'implicitly started for \'install\' command.'))
parser['config_main'].add_argument(
'-n', '--dry-run',
help='Do not execute code.', action='store_true')

17
cdist/config.py
View file

@ -29,18 +29,20 @@ import time
import itertools
import tempfile
import multiprocessing
from cdist.mputil import mp_pool_run, mp_sig_handler
import atexit
import shutil
import socket
from cdist.mputil import mp_pool_run, mp_sig_handler
from cdist import core, inventory
from cdist.util.remoteutil import inspect_ssh_mux_opts
import cdist
import cdist.hostsource
import cdist.exec.local
import cdist.exec.remote
import cdist.util.ipaddr as ipaddr
import cdist.configuration
from cdist import core, inventory
from cdist.util.remoteutil import inspect_ssh_mux_opts
def graph_check_cycle(graph):
@ -195,7 +197,6 @@ class Config(object):
@classmethod
def commandline(cls, args):
"""Configure remote system"""
if (args.parallel and args.parallel != 1) or args.jobs:
if args.timestamp:
cdist.log.setupTimestampingParallelLogging()
@ -382,10 +383,16 @@ class Config(object):
If operating in parallel then return tuple (host, True|False, )
so that main process knows for which host function was successful.
"""
log = logging.getLogger(host)
try:
if args.log_server:
# Start a log server so that nested `cdist config` runs
# have a place to send their logs to.
log_server_socket_dir = tempfile.mkdtemp()
cls._register_path_for_removal(log_server_socket_dir)
cdist.log.setupLogServer(log_server_socket_dir, log)
remote_exec, remote_copy, cleanup_cmd = cls._resolve_remote_cmds(
args)
log.debug("remote_exec for host \"{}\": {}".format(

4
cdist/core/code.py
View file

@ -116,6 +116,10 @@ class Code(object):
if dry_run:
self.env['__cdist_dry_run'] = '1'
if '__cdist_log_server_socket_export' in os.environ:
self.env['__cdist_log_server_socket'] = os.environ[
'__cdist_log_server_socket_export']
def _run_gencode(self, cdist_object, which):
cdist_type = cdist_object.cdist_type
script = os.path.join(self.local.type_path,

14
cdist/install.py
View file

@ -1,7 +1,7 @@
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# 2013 Steven Armstrong (steven-cdist at armstrong.cc)
# 2013-2019 Steven Armstrong (steven-cdist at armstrong.cc)
#
# This file is part of cdist.
#
@ -22,9 +22,21 @@
import cdist.config
import cdist.core
import cdist.log
class Install(cdist.config.Config):
@classmethod
def onehost(cls, host, host_tags, host_base_path, host_dir_name, args,
parallel, configuration, remove_remote_files_dirs=False):
# Always start log server during cdist install so that nested
# `cdist config` runs have a place to send their logs to.
args.log_server = True
super().onehost(host, host_tags, host_base_path, host_dir_name, args,
parallel, configuration, remove_remote_files_dirs)
def object_list(self):
"""Short name for object list retrieval.
In install mode, we only care about install objects.

78
cdist/log.py
View file

@ -2,6 +2,7 @@
# -*- coding: utf-8 -*-
#
# 2010-2013 Nico Schottelius (nico-cdist at schottelius.org)
# 2019-2020 Steven Armstrong
#
# This file is part of cdist.
#
@ -20,9 +21,16 @@
#
#
import logging
import sys
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.
@ -89,20 +97,26 @@ class DefaultLog(logging.Logger):
super().__init__(name)
self.propagate = False
formatter = CdistFormatter(self.FORMAT)
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)
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)
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)
self.addHandler(stdout_handler)
self.addHandler(stderr_handler)
def verbose(self, msg, *args, **kwargs):
self.log(logging.VERBOSE, msg, *args, **kwargs)
@ -152,4 +166,42 @@ def setupParallelLogging():
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()

26
docs/src/man1/cdist.rst
View file

@ -17,20 +17,20 @@ SYNOPSIS
cdist config [-h] [-l LOGLEVEL] [-q] [-v] [-b] [--colors WHEN]
[-g CONFIG_FILE] [-4] [-6] [-C CACHE_PATH_PATTERN]
[-c CONF_DIR] [-i MANIFEST] [-j [JOBS]] [-n] [-o OUT_PATH] [-P]
[-R [{tar,tgz,tbz2,txz}]] [-r REMOTE_OUT_PATH]
[--remote-copy REMOTE_COPY] [--remote-exec REMOTE_EXEC]
[-S] [-I INVENTORY_DIR] [-A] [-a] [-f HOSTFILE]
[-p [HOST_MAX]] [-s] [-t]
[-c CONF_DIR] [-i MANIFEST] [-j [JOBS]] [--log-server]
[-n] [-o OUT_PATH] [-P] [-R [{tar,tgz,tbz2,txz}]]
[-r REMOTE_OUT_PATH] [--remote-copy REMOTE_COPY]
[--remote-exec REMOTE_EXEC] [-S] [-I INVENTORY_DIR] [-A]
[-a] [-f HOSTFILE] [-p [HOST_MAX]] [-s] [-t]
[host [host ...]]
cdist install [-h] [-l LOGLEVEL] [-q] [-v] [-b] [--colors WHEN]
[-g CONFIG_FILE] [-4] [-6] [-C CACHE_PATH_PATTERN]
[-c CONF_DIR] [-i MANIFEST] [-j [JOBS]] [-n] [-o OUT_PATH]
[-P] [-R [{tar,tgz,tbz2,txz}]] [-r REMOTE_OUT_PATH]
[--remote-copy REMOTE_COPY] [--remote-exec REMOTE_EXEC]
[-S] [-I INVENTORY_DIR] [-A] [-a] [-f HOSTFILE]
[-p [HOST_MAX]] [-s] [-t]
[-c CONF_DIR] [-i MANIFEST] [-j [JOBS]] [--log-server]
[-n] [-o OUT_PATH] [-P] [-R [{tar,tgz,tbz2,txz}]]
[-r REMOTE_OUT_PATH] [--remote-copy REMOTE_COPY]
[--remote-exec REMOTE_EXEC] [-S] [-I INVENTORY_DIR] [-A]
[-a] [-f HOSTFILE] [-p [HOST_MAX]] [-s] [-t]
[host [host ...]]
cdist inventory [-h] {add-host,add-tag,del-host,del-tag,list} ...
@ -202,6 +202,12 @@ Install command is currently in beta.
are supported. Without argument CPU count is used by
default.
**--log-server**
Start a log server for sub processes to use. This is
mainly useful when running cdist nested from a code-
local script. Log server is always implicitly started
for 'install' command.
**-n, --dry-run**
Do not execute code.

5
scripts/cdist
View file

@ -60,10 +60,9 @@ def commandline():
if __name__ == "__main__":
cdistpythonversion = '3.5'
if sys.version < cdistpythonversion:
if sys.version < cdist.MIN_SUPPORTED_PYTHON_VERSION:
print('Python >= {} is required on the source host.'.format(
cdistpythonversion), file=sys.stderr)
cdist.MIN_SUPPORTED_PYTHON_VERSIO), file=sys.stderr)
sys.exit(1)
exit_code = 0