Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tree: f72009cf06
Fetching contributors…

Cannot retrieve contributors at this time

file 479 lines (394 sloc) 15.562 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479
"""
buildlogger.py

Wrap a command (specified on the command line invocation of buildlogger.py)
and send output in batches to the buildlogs web application via HTTP POST.

The script configures itself from environment variables:

required env vars:
MONGO_BUILDER_NAME (e.g. "Nightly Linux 64-bit")
MONGO_BUILD_NUMBER (an integer)
MONGO_TEST_FILENAME (not required when invoked with -g)

optional env vars:
MONGO_PHASE (e.g. "core", "slow nightly", etc)
MONGO_* (any other environment vars are passed to the web app)
BUILDLOGGER_CREDENTIALS (see below)

This script has two modes: a "test" mode, intended to wrap the invocation of
an individual test file, and a "global" mode, intended to wrap the mongod
instances that run throughout the duration of a mongo test phase (the logs
from "global" invocations are displayed interspersed with the logs of each
test, in order to let the buildlogs web app display the full output sensibly.)

If the BUILDLOGGER_CREDENTIALS environment variable is set, it should be a
path to a valid Python file containing "username" and "password" variables,
which should be valid credentials for authenticating to the buildlogger web
app. For example:

username = "hello"
password = "world"

If BUILDLOGGER_CREDENTIALS is a relative path, then the working directory
and the directories one, two, and three levels up, are searched, in that
order.
"""

import functools
import os
import os.path
import re
import signal
import socket
import subprocess
import sys
import time
import traceback
import urllib2
import utils

# suppress deprecation warnings that happen when
# we import the 'buildbot.tac' file below
import warnings
warnings.simplefilter('ignore', DeprecationWarning)

try:
    import json
except:
    try:
        import simplejson as json
    except:
        json = None

# try to load the shared secret from settings.py
# which will be one, two, or three directories up
# from this file's location
credentials_file = os.environ.get('BUILDLOGGER_CREDENTIALS', 'buildbot.tac')
credentials_loc, credentials_name = os.path.split(credentials_file)
if not credentials_loc:
    here = os.path.abspath(os.path.dirname(__file__))
    possible_paths = [
        os.path.abspath(os.path.join(here, '..')),
        os.path.abspath(os.path.join(here, '..', '..')),
        os.path.abspath(os.path.join(here, '..', '..', '..')),
    ]
else:
    possible_paths = [credentials_loc]

username, password = None, None
for path in possible_paths:
    credentials_path = os.path.join(path, credentials_name)
    if os.path.isfile(credentials_path):
        credentials = {}
        try:
            execfile(credentials_path, credentials, credentials)
            username = credentials.get('slavename', credentials.get('username'))
            password = credentials.get('passwd', credentials.get('password'))
            break
        except:
            pass


URL_ROOT = 'http://buildlogs.mongodb.org/'
TIMEOUT_SECONDS = 10
socket.setdefaulttimeout(TIMEOUT_SECONDS)

digest_handler = urllib2.HTTPDigestAuthHandler()
digest_handler.add_password(
    realm='buildlogs',
    uri=URL_ROOT,
    user=username,
    passwd=password)

# This version of HTTPErrorProcessor is copied from
# Python 2.7, and allows REST response codes (e.g.
# "201 Created") which are treated as errors by
# older versions.
class HTTPErrorProcessor(urllib2.HTTPErrorProcessor):
    def http_response(self, request, response):
        code, msg, hdrs = response.code, response.msg, response.info()

        # According to RFC 2616, "2xx" code indicates that the client's
        # request was successfully received, understood, and accepted.
        if not (200 <= code < 300):
            response = self.parent.error(
                'http', request, response, code, msg, hdrs)

        return response

url_opener = urllib2.build_opener(digest_handler, HTTPErrorProcessor())

def url(endpoint):
    if not endpoint.endswith('/'):
        endpoint = '%s/' % endpoint

    return '%s/%s' % (URL_ROOT.rstrip('/'), endpoint)

def post(endpoint, data, headers=None):
    data = json.dumps(data, encoding='utf-8')

    headers = headers or {}
    headers.update({'Content-Type': 'application/json; charset=utf-8'})

    req = urllib2.Request(url=url(endpoint), data=data, headers=headers)
    try:
        response = url_opener.open(req)
    except urllib2.URLError:
        import traceback
        traceback.print_exc(file=sys.stderr)
        sys.stderr.flush()
        # indicate that the request did not succeed
        return None

    response_headers = dict(response.info())

    # eg "Content-Type: application/json; charset=utf-8"
    content_type = response_headers.get('content-type')
    match = re.match(r'(?P<mimetype>[^;]+).*(?:charset=(?P<charset>[^ ]+))?$', content_type)
    if match and match.group('mimetype') == 'application/json':
        encoding = match.group('charset') or 'utf-8'
        return json.load(response, encoding=encoding)

    return response.read()

def traceback_to_stderr(func):
    """
decorator which logs any exceptions encountered to stderr
and returns none.
"""
    @functools.wraps(func)
    def wrapper(*args, **kwargs):
        try:
            return func(*args, **kwargs)
        except urllib2.HTTPError, err:
            sys.stderr.write('error: HTTP code %d\n----\n' % err.code)
            if hasattr(err, 'hdrs'):
                for k, v in err.hdrs.items():
                    sys.stderr.write("%s: %s\n" % (k, v))
                sys.stderr.write('\n')
            sys.stderr.write(err.read())
            sys.stderr.write('\n----\n')
            sys.stderr.flush()
        except:
            sys.stderr.write('Traceback from buildlogger:\n')
            traceback.print_exc(file=sys.stderr)
            sys.stderr.flush()
        return None
    return wrapper


@traceback_to_stderr
def get_or_create_build(builder, buildnum, extra={}):
    data = {'builder': builder, 'buildnum': buildnum}
    data.update(extra)
    response = post('build', data)
    if response is None:
        return None
    return response['id']

@traceback_to_stderr
def create_test(build_id, test_filename, test_command, test_phase):
    response = post('build/%s/test' % build_id, {
        'test_filename': test_filename,
        'command': test_command,
        'phase': test_phase,
    })
    if response is None:
        return None
    return response['id']

@traceback_to_stderr
def append_test_logs(build_id, test_id, log_lines):
    response = post('build/%s/test/%s' % (build_id, test_id), data=log_lines)
    if response is None:
        return False
    return True

@traceback_to_stderr
def append_global_logs(build_id, log_lines):
    """
"global" logs are for the mongod(s) started by smoke.py
that last the duration of a test phase -- since there
may be output in here that is important but spans individual
tests, the buildlogs webapp handles these logs specially.
"""
    response = post('build/%s' % build_id, data=log_lines)
    if response is None:
        return False
    return True

@traceback_to_stderr
def finish_test(build_id, test_id, failed=False):
    response = post('build/%s/test/%s' % (build_id, test_id), data=[], headers={
        'X-Sendlogs-Test-Done': 'true',
        'X-Sendlogs-Test-Failed': failed and 'true' or 'false',
    })
    if response is None:
        return False
    return True

def run_and_echo(command):
    """
this just calls the command, and returns its return code,
allowing stdout and stderr to work as normal. it is used
as a fallback when environment variables or python
dependencies cannot be configured, or when the logging
webapp is unavailable, etc
"""
    proc = subprocess.Popen(command)

    def handle_sigterm(signum, frame):
        try:
            proc.send_signal(signum)
        except AttributeError:
            os.kill(proc.pid, signum)
    orig_handler = signal.signal(signal.SIGTERM, handle_sigterm)

    proc.wait()

    signal.signal(signal.SIGTERM, orig_handler)
    return proc.returncode

class LogAppender(object):
    def __init__(self, callback, args, send_after_lines=200, send_after_seconds=2):
        self.callback = callback
        self.callback_args = args

        self.send_after_lines = send_after_lines
        self.send_after_seconds = send_after_seconds

        self.buf = []
        self.retrybuf = []
        self.last_sent = time.time()

    def __call__(self, line):
        self.buf.append((time.time(), line))

        delay = time.time() - self.last_sent
        if len(self.buf) >= self.send_after_lines or delay >= self.send_after_seconds:
            self.submit()

        # no return value is expected

    def submit(self):
        if len(self.buf) + len(self.retrybuf) == 0:
            return True

        args = list(self.callback_args)
        args.append(list(self.buf) + self.retrybuf)

        self.last_sent = time.time()

        if self.callback(*args):
            self.buf = []
            self.retrybuf = []
            return True
        else:
            self.retrybuf += self.buf
            self.buf = []
            return False


def wrap_test(command):
    """
call the given command, intercept its stdout and stderr,
and send results in batches of 100 lines or 10s to the
buildlogger webapp
"""

    # get builder name and build number from environment
    builder = os.environ.get('MONGO_BUILDER_NAME')
    buildnum = os.environ.get('MONGO_BUILD_NUMBER')

    if builder is None or buildnum is None:
        return run_and_echo(command)

    try:
        buildnum = int(buildnum)
    except ValueError:
        sys.stderr.write('buildlogger: build number ("%s") was not an int\n' % buildnum)
        sys.stderr.flush()
        return run_and_echo(command)

    # test takes some extra info
    phase = os.environ.get('MONGO_PHASE', 'unknown')
    test_filename = os.environ.get('MONGO_TEST_FILENAME', 'unknown')

    build_info = dict((k, v) for k, v in os.environ.items() if k.startswith('MONGO_'))
    build_info.pop('MONGO_BUILDER_NAME', None)
    build_info.pop('MONGO_BUILD_NUMBER', None)
    build_info.pop('MONGO_PHASE', None)
    build_info.pop('MONGO_TEST_FILENAME', None)

    build_id = get_or_create_build(builder, buildnum, extra=build_info)
    if not build_id:
        return run_and_echo(command)

    test_id = create_test(build_id, test_filename, ' '.join(command), phase)
    if not test_id:
        return run_and_echo(command)

    # the peculiar formatting here matches what is printed by
    # smoke.py when starting tests
    output_url = '%s/build/%s/test/%s/' % (URL_ROOT.rstrip('/'), build_id, test_id)
    sys.stdout.write(' (output suppressed; see %s)\n' % output_url)
    sys.stdout.flush()

    callback = LogAppender(callback=append_test_logs, args=(build_id, test_id))
    returncode = loop_and_callback(command, callback)
    failed = bool(returncode != 0)

    # this will append any remaining unsubmitted logs, or
    # return True if there are none left to submit
    tries = 5
    while not callback.submit() and tries > 0:
        sys.stderr.write('failed to finish sending test logs, retrying in 1s\n')
        sys.stderr.flush()
        time.sleep(1)
        tries -= 1

    tries = 5
    while not finish_test(build_id, test_id, failed) and tries > 5:
        sys.stderr.write('failed to mark test finished, retrying in 1s\n')
        sys.stderr.flush()
        time.sleep(1)
        tries -= 1

    return returncode

def wrap_global(command):
    """
call the given command, intercept its stdout and stderr,
and send results in batches of 100 lines or 10s to the
buildlogger webapp. see :func:`append_global_logs` for the
difference between "global" and "test" log output.
"""

    # get builder name and build number from environment
    builder = os.environ.get('MONGO_BUILDER_NAME')
    buildnum = os.environ.get('MONGO_BUILD_NUMBER')

    if builder is None or buildnum is None:
        return run_and_echo(command)

    try:
        buildnum = int(buildnum)
    except ValueError:
        sys.stderr.write('int(os.environ["MONGO_BUILD_NUMBER"]):\n')
        sys.stderr.write(traceback.format_exc())
        sys.stderr.flush()
        return run_and_echo(command)

    build_info = dict((k, v) for k, v in os.environ.items() if k.startswith('MONGO_'))
    build_info.pop('MONGO_BUILDER_NAME', None)
    build_info.pop('MONGO_BUILD_NUMBER', None)

    build_id = get_or_create_build(builder, buildnum, extra=build_info)
    if not build_id:
        return run_and_echo(command)

    callback = LogAppender(callback=append_global_logs, args=(build_id, ))
    returncode = loop_and_callback(command, callback)

    # this will append any remaining unsubmitted logs, or
    # return True if there are none left to submit
    tries = 5
    while not callback.submit() and tries > 0:
        sys.stderr.write('failed to finish sending global logs, retrying in 1s\n')
        sys.stderr.flush()
        time.sleep(1)
        tries -= 1

    return returncode

def loop_and_callback(command, callback):
    """
run the given command (a sequence of arguments, ordinarily
from sys.argv), and call the given callback with each line
of stdout or stderr encountered. after the command is finished,
callback is called once more with None instead of a string.
"""
    proc = subprocess.Popen(
        command,
        stdout=subprocess.PIPE,
        stderr=subprocess.STDOUT,
    )

    def handle_sigterm(signum, frame):
        try:
            proc.send_signal(signum)
        except AttributeError:
            os.kill(proc.pid, signum)

    # register a handler to delegate SIGTERM
    # to the child process
    orig_handler = signal.signal(signal.SIGTERM, handle_sigterm)

    while proc.poll() is None:
        try:
            line = proc.stdout.readline().strip('\r\n')
            line = utils.unicode_dammit(line)
            callback(line)
        except IOError:
            # if the signal handler is called while
            # we're waiting for readline() to return,
            # don't show a traceback
            break

    # There may be additional buffered output
    for line in proc.stdout.readlines():
        callback(line.strip('\r\n'))

    # restore the original signal handler, if any
    signal.signal(signal.SIGTERM, orig_handler)
    return proc.returncode


if __name__ == '__main__':
    # argv[0] is 'buildlogger.py'
    del sys.argv[0]

    if sys.argv[0] in ('-g', '--global'):
        # then this is wrapping a "global" command, and should
        # submit global logs to the build, not test logs to a
        # test within the build
        del sys.argv[0]
        wrapper = wrap_global

    else:
        wrapper = wrap_test

    # if we are missing credentials or the json module, then
    # we can't use buildlogger; so just echo output, but also
    # log why we can't work.
    if json is None:
        sys.stderr.write('buildlogger: could not import a json module\n')
        sys.stderr.flush()
        wrapper = run_and_echo

    elif username is None or password is None:
        sys.stderr.write('buildlogger: could not find or import %s for authentication\n' % credentials_file)
        sys.stderr.flush()
        wrapper = run_and_echo

    # otherwise wrap a test command as normal; the
    # wrapper functions return the return code of
    # the wrapped command, so that should be our
    # exit code as well.
    sys.exit(wrapper(sys.argv))
Something went wrong with that request. Please try again.