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Exclude relays that deliver an expired consensus from the fallback list

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Part of #20539, based on #20501.
This commit is contained in:
teor 2016-12-06 22:25:12 +11:00
parent 243d6fa0c7
commit 8381d928cf
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1 changed files with 29 additions and 11 deletions
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34
scripts/maint/updateFallbackDirs.py
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@ -38,7 +38,8 @@ import dateutil.parser
#from bson import json_util
import copy
from stem.descriptor.remote import DescriptorDownloader
from stem.descriptor import DocumentHandler
from stem.descriptor.remote import get_consensus
import logging
# INFO tells you why each relay was included or excluded
@ -80,6 +81,9 @@ PERFORM_IPV4_DIRPORT_CHECKS = False if OUTPUT_CANDIDATES else True
# Don't check ~1000 candidates when OUTPUT_CANDIDATES is True
PERFORM_IPV6_DIRPORT_CHECKS = False if OUTPUT_CANDIDATES else False
# Clients have been using microdesc consensuses by default for a while now
DOWNLOAD_MICRODESC_CONSENSUS = True
# Output fallback name, flags, bandwidth, and ContactInfo in a C comment?
OUTPUT_COMMENTS = True if OUTPUT_CANDIDATES else False
@ -1120,25 +1124,30 @@ class Candidate(object):
return True
return False
# report how long it takes to download a consensus from dirip:dirport
# log how long it takes to download a consensus from dirip:dirport
# returns True if the download failed, False if it succeeded within max_time
@staticmethod
def fallback_consensus_download_speed(dirip, dirport, nickname, max_time):
download_failed = False
downloader = DescriptorDownloader()
start = datetime.datetime.utcnow()
# some directory mirrors respond to requests in ways that hang python
# sockets, which is why we log this line here
logging.info('Initiating consensus download from %s (%s:%d).', nickname,
dirip, dirport)
logging.info('Initiating %sconsensus download from %s (%s:%d).',
'microdesc ' if DOWNLOAD_MICRODESC_CONSENSUS else '',
nickname, dirip, dirport)
# there appears to be about 1 second of overhead when comparing stem's
# internal trace time and the elapsed time calculated here
TIMEOUT_SLOP = 1.0
try:
downloader.get_consensus(endpoints = [(dirip, dirport)],
consensus = get_consensus(
endpoints = [(dirip, dirport)],
timeout = (max_time + TIMEOUT_SLOP),
validate = True,
retries = 0,
fall_back_to_authority = False).run()
fall_back_to_authority = False,
document_handler = DocumentHandler.BARE_DOCUMENT,
microdescriptor = DOWNLOAD_MICRODESC_CONSENSUS
).run()[0]
except Exception, stem_error:
logging.info('Unable to retrieve a consensus from %s: %s', nickname,
stem_error)
@ -1146,10 +1155,19 @@ class Candidate(object):
level = logging.WARNING
download_failed = True
elapsed = (datetime.datetime.utcnow() - start).total_seconds()
if elapsed > max_time:
if download_failed:
# keep the error failure status
pass
elif elapsed > max_time:
status = 'too slow'
level = logging.WARNING
download_failed = True
elif datetime.datetime.utcnow() > consensus.valid_until:
time_since_expiry = (datetime.datetime.utcnow() -
consensus.valid_until).total_seconds()
status = 'outdated consensus, expired %ds ago'%(int(time_since_expiry))
level = logging.WARNING
download_failed = True
else:
status = 'ok'
level = logging.DEBUG