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#!/usr/bin/python -S
#
# Copyright 2009 Canonical Ltd. This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
# pylint: disable-msg=C0103,W0403
"""Script to probe distribution mirrors and check how up-to-date they are."""
import _pythonpath
import os
from StringIO import StringIO
from twisted.internet import reactor
from zope.component import getUtility
from canonical.config import config
from canonical.database.sqlbase import ISOLATION_LEVEL_AUTOCOMMIT
from lp.services.scripts.base import (
LaunchpadCronScript, LaunchpadScriptFailure)
from canonical.launchpad.interfaces import (
IDistributionMirrorSet, ILibraryFileAliasSet, MirrorContent)
from canonical.launchpad.webapp import canonical_url
from lp.registry.scripts.distributionmirror_prober import (
get_expected_cdimage_paths, probe_archive_mirror, probe_cdimage_mirror)
class DistroMirrorProber(LaunchpadCronScript):
usage = ('%prog --content-type=(archive|cdimage) [--force] '
'[--no-owner-notification] [--max-mirrors=N]')
def _sanity_check_mirror(self, mirror):
"""Check that the given mirror is official and has an http_base_url.
"""
assert mirror.isOfficial(), (
'Non-official mirrors should not be probed')
if mirror.base_url is None:
self.logger.warning(
"Mirror '%s' of distribution '%s' doesn't have a base URL; "
"we can't probe it." % (
mirror.name, mirror.distribution.name))
return False
return True
def _create_probe_record(self, mirror, logfile):
"""Create a probe record for the given mirror with the given logfile.
"""
logfile.seek(0)
filename = '%s-probe-logfile.txt' % mirror.name
log_file = getUtility(ILibraryFileAliasSet).create(
name=filename, size=len(logfile.getvalue()),
file=logfile, contentType='text/plain')
mirror.newProbeRecord(log_file)
def add_my_options(self):
self.parser.add_option('--content-type',
dest='content_type', default=None, action='store',
help='Probe only mirrors of the given type')
self.parser.add_option('--force',
dest='force', default=False, action='store_true',
help='Force the probing of mirrors that were probed recently')
self.parser.add_option('--no-owner-notification',
dest='no_owner_notification', default=False, action='store_true',
help='Do not send failure notification to mirror owners.')
self.parser.add_option('--no-remote-hosts',
dest='no_remote_hosts', default=False, action='store_true',
help='Do not try to connect to any host other than localhost.')
self.parser.add_option('--max-mirrors',
dest='max_mirrors', default=None, action='store', type="int",
help='Only probe N mirrors.')
def main(self):
if self.options.content_type == 'archive':
probe_function = probe_archive_mirror
content_type = MirrorContent.ARCHIVE
elif self.options.content_type == 'cdimage':
probe_function = probe_cdimage_mirror
content_type = MirrorContent.RELEASE
else:
raise LaunchpadScriptFailure(
'Wrong value for argument --content-type: %s'
% self.options.content_type)
orig_proxy = os.environ.get('http_proxy')
if config.distributionmirrorprober.use_proxy:
os.environ['http_proxy'] = config.launchpad.http_proxy
self.logger.debug("Using %s as proxy." % os.environ['http_proxy'])
else:
self.logger.debug("Not using any proxy.")
self.txn.set_isolation_level(ISOLATION_LEVEL_AUTOCOMMIT)
self.txn.begin()
# Using a script argument to control a config variable is not a great
# idea, but to me this seems better than passing the no_remote_hosts
# value through a lot of method/function calls, until it reaches the
# probe() method.
if self.options.no_remote_hosts:
localhost_only_conf = """
[distributionmirrorprober]
localhost_only: True
"""
config.push('localhost_only_conf', localhost_only_conf)
self.logger.info('Probing %s Mirrors' % content_type.title)
mirror_set = getUtility(IDistributionMirrorSet)
results = mirror_set.getMirrorsToProbe(
content_type, ignore_last_probe=self.options.force,
limit=self.options.max_mirrors)
mirror_ids = [mirror.id for mirror in results]
unchecked_keys = []
logfiles = {}
probed_mirrors = []
for mirror_id in mirror_ids:
mirror = mirror_set[mirror_id]
if not self._sanity_check_mirror(mirror):
continue
# XXX: salgado 2006-05-26:
# Some people registered mirrors on distros other than Ubuntu back
# in the old times, so now we need to do this small hack here.
if not mirror.distribution.full_functionality:
self.logger.info(
"Mirror '%s' of distribution '%s' can't be probed --we "
"only probe Ubuntu mirrors."
% (mirror.name, mirror.distribution.name))
continue
probed_mirrors.append(mirror)
logfile = StringIO()
logfiles[mirror_id] = logfile
probe_function(mirror, logfile, unchecked_keys, self.logger)
if probed_mirrors:
reactor.run()
self.logger.info('Probed %d mirrors.' % len(probed_mirrors))
else:
self.logger.info('No mirrors to probe.')
disabled_mirrors = []
reenabled_mirrors = []
# Now that we finished probing all mirrors, we check if any of these
# mirrors appear to have no content mirrored, and, if so, mark them as
# disabled and notify their owners.
expected_iso_images_count = len(get_expected_cdimage_paths())
notify_owner = not self.options.no_owner_notification
for mirror in probed_mirrors:
log = logfiles[mirror.id]
self._create_probe_record(mirror, log)
if mirror.shouldDisable(expected_iso_images_count):
if mirror.enabled:
log.seek(0)
mirror.disable(notify_owner, log.getvalue())
disabled_mirrors.append(canonical_url(mirror))
else:
# Ensure the mirror is enabled, so that it shows up on public
# mirror listings.
if not mirror.enabled:
mirror.enabled = True
reenabled_mirrors.append(canonical_url(mirror))
if disabled_mirrors:
self.logger.info(
'Disabling %s mirror(s): %s'
% (len(disabled_mirrors), ", ".join(disabled_mirrors)))
if reenabled_mirrors:
self.logger.info(
'Re-enabling %s mirror(s): %s'
% (len(reenabled_mirrors), ", ".join(reenabled_mirrors)))
# XXX: salgado 2007-04-03:
# This should be done in LaunchpadScript.lock_and_run() when
# the isolation used is ISOLATION_LEVEL_AUTOCOMMIT. Also note
# that replacing this with a flush_database_updates() doesn't
# have the same effect, it seems.
self.txn.commit()
self.logger.info('Done.')
if __name__ == '__main__':
script = DistroMirrorProber('distributionmirror-prober',
dbuser=config.distributionmirrorprober.dbuser)
script.lock_and_run()
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