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#!/usr/bin/env python3
#
# Copyright (C) 2014-2019 Codethink Limited
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import json
import logging
import time
import urllib.request, urllib.error, urllib.parse
import cliapp
class JobInfo(object):
def __init__(self, job_id, exit_code, exit_timestamp, start_timestamp):
self.job_id = job_id
self.exit_code = exit_code
self.exit_timestamp = exit_timestamp
self.start_timestamp = start_timestamp
def __repr__(self):
return 'JobInfo(%s,%s,%s,%s)' % (
self.job_id, self.exit_code, self.exit_timestamp,
self.start_timestamp)
class OldJobRemover(cliapp.Application):
def add_settings(self):
self.settings.string(
['webapp-host'],
'address of WEBAPP',
default='localhost')
self.settings.integer(
['webapp-port'],
'port of WEBAPP',
default=12765)
ONE_MINUTE = 60
ONE_HOUR = 60 * ONE_MINUTE
ONE_DAY = 24 * ONE_HOUR
self.settings.integer(
['max-age-in-seconds', 'max-age'],
'maximum age of a finished job in seconds',
metavar='SECONDS',
default=3 * ONE_DAY)
self.settings.integer(
['debug-now'],
'for tests and debugging, '
'set current time to SECONDS since the epoch '
'(set to 0 to use real time',
metavar='SECONDS')
def process_args(self, args):
logging.info('Removing old jobs from Lorry Controller STATEDB')
for job_id in sorted(self.list_jobs()):
try:
job_info = self.get_job_info(job_id)
except urllib.error.HTTPError as e:
logging.warning(
'Trouble getting job info for job %s: %s' %
(job_id, str(e)))
continue
# If the start time of this job is less than max-age ago,
# then the finish time of this job, and every job with a
# higher ID, must be less than max-age ago. So we can
# stop now.
if self.was_started_too_recently(job_info):
break
if self.is_old(job_info):
self.remove_job(job_info.job_id)
def list_jobs(self):
data = self.get('/1.0/list-jobs')
obj = json.loads(data.decode('utf-8'))
return obj['job_ids']
def get(self, path):
url = self.make_url(path)
with urllib.request.urlopen(url) as f:
return f.read()
def make_url(self, path):
scheme = 'http'
netloc = '%s:%s' % (
self.settings['webapp-host'], self.settings['webapp-port'])
query = None
fragment = None
parts = (scheme, netloc, path, query, fragment)
return urllib.parse.urlunsplit(parts)
def get_job_info(self, job_id):
data = self.get('/1.0/job/%s' % job_id)
obj = json.loads(data.decode('utf-8'))
exit_code = obj['exit']
if obj['job_ended']:
exit_timestamp = self.parse_timestamp(obj['job_ended'])
else:
exit_timestamp = None
start_timestamp = self.parse_timestamp(obj['job_started'])
return JobInfo(job_id, exit_code, exit_timestamp, start_timestamp)
def parse_timestamp(self, timestamp):
return time.mktime(time.strptime(timestamp, '%Y-%m-%d %H:%M:%S UTC'))
def is_old(self, job_info):
if job_info.exit_timestamp is None:
return False
current_time = self.get_current_time()
age_in_seconds = current_time - job_info.exit_timestamp
return age_in_seconds >= self.settings['max-age-in-seconds']
def was_started_too_recently(self, job_info):
current_time = self.get_current_time()
age_in_seconds = current_time - job_info.start_timestamp
return age_in_seconds < self.settings['max-age-in-seconds']
def get_current_time(self):
if self.settings['debug-now']:
return self.settings['debug-now']
return time.time()
def remove_job(self, job_id):
logging.info('Removing job %s', job_id)
self.post('/1.0/remove-job', 'job_id=%s' % job_id)
def post(self, path, data):
url = self.make_url(path)
with urllib.request.urlopen(url, data.encode('utf-8')) as f:
f.read()
OldJobRemover().run()
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