/usr/share/pyshared/slapos/grid/svcbackend.py is in slapos-node-unofficial 0.35.1-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | # -*- coding: utf-8 -*-
# vim: set et sts=2:
##############################################################################
#
# Copyright (c) 2010, 2011, 2012 Vifib SARL and Contributors.
# All Rights Reserved.
#
# WARNING: This program as such is intended to be used by professional
# programmers who take the whole responsibility of assessing all potential
# consequences resulting from its eventual inadequacies and bugs
# End users who are looking for a ready-to-use solution with commercial
# guarantees and support are strongly advised to contract a Free Software
# Service Company
#
# 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; either version 3
# of the License, or (at your option) any later version.
#
# 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
##############################################################################
from supervisor import xmlrpc
import time
from utils import SlapPopen
import logging
import os
import sys
import xmlrpclib
from optparse import OptionParser
import ConfigParser
import socket as socketlib
import subprocess
def getSupervisorRPC(socket):
supervisor_transport = xmlrpc.SupervisorTransport('', '',
'unix://' + socket)
server_proxy = xmlrpclib.ServerProxy('http://127.0.0.1',
supervisor_transport)
return getattr(server_proxy, 'supervisor')
def launchSupervisord(socket, configuration_file):
logger = logging.getLogger('SVCBackend')
supervisor = getSupervisorRPC(socket)
if os.path.exists(socket):
trynum = 1
while trynum < 6:
try:
status = supervisor.getState()
except xmlrpclib.Fault as e:
if e.faultCode == 6 and e.faultString == 'SHUTDOWN_STATE':
logger.info('Supervisor in shutdown procedure, will check again later.')
trynum += 1
time.sleep(2 * trynum)
except Exception:
# In case if there is problem with connection, assume that supervisord
# is not running and try to run it
break
else:
if status['statename'] == 'RUNNING' and status['statecode'] == 1:
logger.debug('Supervisord already running.')
return
elif status['statename'] == 'SHUTDOWN_STATE' and status['statecode'] == 6:
logger.info('Supervisor in shutdown procedure, will check again later.')
trynum += 1
time.sleep(2 * trynum)
else:
log_message = 'Unknown supervisord state %r. Will try to start.' % status
logger.warning(log_message)
break
logger.info("Launching supervisord with clean environment.")
# Extract python binary to prevent shebang size limit
invocation_list = ["supervisord", '-c']
invocation_list.append("import sys ; sys.path=" + str(sys.path) + " ; import "
"supervisor.supervisord ; sys.argv[1:1]=['-c','" +
configuration_file +
"'] ; supervisor.supervisord.main()")
supervisord_popen = SlapPopen(invocation_list,
env={},
executable=sys.executable,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT)
result = supervisord_popen.communicate()[0]
if supervisord_popen.returncode == 0:
logger.info('Supervisord command invoked with: %s' % result)
try:
default_timeout = socketlib.getdefaulttimeout()
current_timeout = 1
trynum = 1
while trynum < 6:
try:
socketlib.setdefaulttimeout(current_timeout)
status = supervisor.getState()
if status['statename'] == 'RUNNING' and status['statecode'] == 1:
return
logger.warning('Wrong status name %(statename)r and code '
'%(statecode)r, trying again' % status)
trynum += 1
except Exception:
current_timeout = 5 * trynum
trynum += 1
else:
logger.info('Supervisord started correctly in try %s.' % trynum)
return
logger.warning('Issue while checking supervisord.')
finally:
socketlib.setdefaulttimeout(default_timeout)
else:
log_message = 'Supervisord unknown problem: %s' % result
logger.warning(log_message)
def getOptionDict(*argument_tuple):
usage = """
Typical usage:
* %prog CONFIGURATION_FILE [arguments passed to supervisor]
If CONFIGURATION_FILE is not given explicitly, it fallbacks on
`/etc/slapos/slapos-node-unofficial.cfg'.
""".strip()
parser = OptionParser(usage=usage)
# Parses arguments
if argument_tuple:
(argument_option_instance, argument_list) = parser.parse_args(list(argument_tuple))
else:
# No arguments given to entry point : we parse sys.argv.
(argument_option_instance, argument_list) = parser.parse_args()
if argument_list and os.path.exists(argument_list[0]):
configuration_file = argument_list.pop(0)
else:
configuration_file = '/etc/slapos/slapos-node-unofficial.cfg'
if not os.path.exists(configuration_file):
parser.error("Could not read configuration file: %s" % configuration_file)
slapgrid_configuration = ConfigParser.SafeConfigParser()
slapgrid_configuration.read(configuration_file)
# Merges the two dictionnaries
option_dict = dict(slapgrid_configuration.items("slapos"))
# Supervisord configuration location
option_dict.setdefault('supervisord_configuration_path',
os.path.join(option_dict['instance_root'], 'etc', 'supervisord.conf'))
# Supervisord socket
option_dict.setdefault('supervisord_socket',
os.path.join(option_dict['instance_root'], 'supervisord.socket'))
return option_dict, argument_list
def supervisorctl(*argument_tuple):
option_dict, args = getOptionDict(*argument_tuple)
import supervisor.supervisorctl
launchSupervisord(option_dict['supervisord_socket'],
option_dict['supervisord_configuration_path'])
supervisor.supervisorctl.main(args=['-c',
option_dict['supervisord_configuration_path']] + args)
def supervisord(*argument_tuple):
option_dict, _ = getOptionDict(*argument_tuple)
launchSupervisord(option_dict['supervisord_socket'],
option_dict['supervisord_configuration_path'])
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