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# Copyright (C) 2014 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 collections
import logging
import re
import time
import bottle
import cliapp
import lorrycontroller
class GitanoCommandFailure(Exception):
def __init__(self, trovehost, command):
Exception.__init__(
self, 'Failed to run "%s" on Gitano on %s' % (command, trovehost))
class GiveMeJob(lorrycontroller.LorryControllerRoute):
http_method = 'POST'
path = '/1.0/give-me-job'
def run(self, **kwargs):
logging.info('%s %s called', self.http_method, self.path)
readdb = self.open_statedb()
if readdb.get_running_queue() and not self.max_jobs_reached(readdb):
statedb = self.open_statedb()
with statedb:
lorry_infos = statedb.get_all_lorries_info()
now = statedb.get_current_time()
for lorry_info in lorry_infos:
if self.ready_to_run(lorry_info, now):
self.create_repository_in_local_trove(lorry_info)
if lorry_info['from_trovehost']:
self.copy_repository_metadata(lorry_info)
self.give_job_to_minion(statedb, lorry_info, now)
logging.info(
'Giving job %s to lorry %s to MINION %s:%s',
lorry_info['job_id'],
lorry_info['path'],
bottle.request.forms.host,
bottle.request.forms.pid)
return lorry_info
logging.info('No job to give MINION')
return { 'job_id': None }
def max_jobs_reached(self, statedb):
max_jobs = statedb.get_max_jobs()
if max_jobs is None:
return False
running_jobs = statedb.get_running_jobs()
return len(running_jobs) >= max_jobs
def ready_to_run(self, lorry_info, now):
due = lorry_info['last_run'] + lorry_info['interval']
return (lorry_info['running_job'] is None and due <= now)
def create_repository_in_local_trove(self, lorry_info):
# Create repository on local Trove. If it fails, assume
# it failed because the repository already existed, and
# ignore the failure (but log message).
exit, stdout, stderr = cliapp.runcmd_unchecked(
['ssh', 'git@localhost', 'create', lorry_info['path']])
if exit:
logging.debug(
'Ignoring error creating %s on local Trove:\n%s\n%s',
lorry_info['path'], stdout, stderr)
else:
logging.info('Created %s on local repo', lorry_info['path'])
def copy_repository_metadata(self, lorry_info):
'''Copy project.head and project.description to the local Trove.'''
assert lorry_info['from_trovehost']
assert lorry_info['from_path']
try:
remote_config = self.get_gitano_config(
lorry_info['from_trovehost'], lorry_info['from_path'])
local_config = self.get_gitano_config('localhost', lorry_info['path'])
if remote_config['project.head'] != local_config['project.head']:
self.set_gitano_config(
'localhost', lorry_info['path'],
'project.head', remote_config['project.head'])
if not local_config['project.description']:
desc = '{host}: {desc}'.format(
host=lorry_info['from_trovehost'],
desc=remote_config['project.description'])
self.set_gitano_config(
'localhost', lorry_info['path'],
'project.description', desc)
except GitanoCommandFailure as e:
logging.error('ERROR: %s' % str(e))
bottle.abort(500)
def get_gitano_config(self, trovehost, repo_path):
exit, stdout, stderr = cliapp.runcmd_unchecked(
['ssh', 'git@%s' % trovehost,
'config', cliapp.shell_quote(repo_path), 'show'])
if exit:
raise GitanoCommandFailure(trovehost, 'config show')
# "config REPO show" outputs a sequence of lines of the form "key: value".
# Extract those into a collections.defaultdict.
result = collections.defaultdict(str)
for line in stdout.splitlines():
m = re.match(r'^([^:])+:\s*(.*)$', line)
if m:
result[m.group(0)] = m.group(1).strip()
return result
def set_gitano_config(self, trovehost, repo_path, key, value):
exit, stdout, stderr = cliapp.runcmd_unchecked(
['ssh', 'git@%s' % trovehost,
'config', cliapp.shell_quote(repo_path),
'set', cliapp.shell_quote(key), cliapp.shell_quote(value)])
if exit:
raise GitanoCommandFailure(trovehost, 'config set')
def give_job_to_minion(self, statedb, lorry_info, now):
path = lorry_info['path']
minion_host = bottle.request.forms.host
minion_pid = bottle.request.forms.pid
running_job = statedb.get_next_job_id()
statedb.set_running_job(path, running_job)
statedb.add_new_job(
running_job, minion_host, minion_pid, path, int(now))
lorry_info['job_id'] = running_job
return lorry_info
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