fc91cfd255
I had previously asked for this, but we're hoping to handle it in a more generic way. Just because we receive a signal doesn't mean that all logging is broken. The more general solution we'll chase is to catch a failure of a log message and fall back if necessary across the board. That way cloud-init will still send logging to the right places on a user interupt.
72 lines
2.3 KiB
Python
72 lines
2.3 KiB
Python
# vi: ts=4 expandtab
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#
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# Copyright (C) 2012 Canonical Ltd.
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# Copyright (C) 2012 Yahoo! Inc.
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#
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# Author: Scott Moser <scott.moser@canonical.com>
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# Author: Joshua Harlow <harlowja@yahoo-inc.com>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 3, as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import inspect
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import signal
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import sys
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from StringIO import StringIO
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from cloudinit import log as logging
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from cloudinit import util
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from cloudinit import version as vr
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LOG = logging.getLogger(__name__)
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BACK_FRAME_TRACE_DEPTH = 3
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EXIT_FOR = {
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signal.SIGINT: ('Cloud-init %(version)s received SIGINT, exiting...', 1),
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signal.SIGTERM: ('Cloud-init %(version)s received SIGTERM, exiting...', 1),
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# Can't be caught...
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# signal.SIGKILL: ('Cloud-init killed, exiting...', 1),
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signal.SIGABRT: ('Cloud-init %(version)s received SIGABRT, exiting...', 1),
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}
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def _pprint_frame(frame, depth, max_depth, contents):
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if depth > max_depth or not frame:
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return
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frame_info = inspect.getframeinfo(frame)
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prefix = " " * (depth * 2)
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contents.write("%sFilename: %s\n" % (prefix, frame_info.filename))
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contents.write("%sFunction: %s\n" % (prefix, frame_info.function))
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contents.write("%sLine number: %s\n" % (prefix, frame_info.lineno))
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_pprint_frame(frame.f_back, depth + 1, max_depth, contents)
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def _handle_exit(signum, frame):
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(msg, rc) = EXIT_FOR[signum]
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msg = msg % ({'version': vr.version()})
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contents = StringIO()
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contents.write("%s\n" % (msg))
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_pprint_frame(frame, 1, BACK_FRAME_TRACE_DEPTH, contents)
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util.multi_log(contents.getvalue(),
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console=True, stderr=False, log=LOG)
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sys.exit(rc)
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def attach_handlers():
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sigs_attached = 0
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for signum in EXIT_FOR.keys():
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signal.signal(signum, _handle_exit)
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sigs_attached += len(EXIT_FOR)
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return sigs_attached
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