import logging
import sys
# import traceback
from os import getpid
from os.path import isdir
from daemon import runner
from time import sleep
from sys import version_info
import os
import mysql.connector
from mysql.connector import errorcode
from logging.handlers import TimedRotatingFileHandler, MemoryHandler
import os.path
sys.path.append(os.path.join(os.path.dirname(os.path.realpath(__file__)), os.pardir))
sys.path.insert(0, os.path.dirname(__file__))
import settings
from validate_settings import validate_settings_variables
from luminosity import Luminosity
skyline_app = 'luminosity'
skyline_app_logger = skyline_app + 'Log'
logger = logging.getLogger(skyline_app_logger)
logfile = '%s/%s.log' % (settings.LOG_PATH, skyline_app)
python_version = int(version_info[0])
# Database configuration - Luminosity uses the same database settings as Panorama
try:
config = {'user': settings.PANORAMA_DBUSER,
'password': settings.PANORAMA_DBUSERPASS,
'host': settings.PANORAMA_DBHOST,
'port': settings.PANORAMA_DBPORT,
'database': settings.PANORAMA_DATABASE,
'raise_on_warnings': True}
except:
print ('error: failed to determine database settings from settings.py')
sys.exit(1)
[docs]class LuminosityAgent():
def __init__(self):
self.stdin_path = '/dev/null'
self.stdout_path = '%s/%s.log' % (settings.LOG_PATH, skyline_app)
self.stderr_path = '%s/%s.log' % (settings.LOG_PATH, skyline_app)
# http://www.gavinj.net/2012/06/building-python-daemon-process.html
# gavinj.net does
# self.stdout_path = '/dev/tty'
# self.stderr_path = '/dev/tty'
# And this agent pattern is pretty much right from gavinj.net
# For years the overwriting of logs was a bug bear which was eventually
# handled through a combination of bash and a bit of Python waiting,
# and the bin files were used to manage the log so that any Python
# through some
self.pidfile_path = '%s/%s.pid' % (settings.PID_PATH, skyline_app)
self.pidfile_timeout = 5
[docs] def run(self):
logger.info('agent :: starting Skyline Luminosity')
Luminosity(getpid()).start()
while 1:
sleep(100)
if __name__ == "__main__":
"""
Start the Luminosity agent.
"""
if not isdir(settings.PID_PATH):
print ('pid directory does not exist at %s' % settings.PID_PATH)
sys.exit(1)
if not isdir(settings.LOG_PATH):
print ('log directory does not exist at %s' % settings.LOG_PATH)
sys.exit(1)
logger.setLevel(logging.DEBUG)
formatter = logging.Formatter("%(asctime)s :: %(process)s :: %(message)s", datefmt="%Y-%m-%d %H:%M:%S")
handler = logging.handlers.TimedRotatingFileHandler(
logfile,
when="midnight",
interval=1,
backupCount=5)
memory_handler = logging.handlers.MemoryHandler(256,
flushLevel=logging.DEBUG,
target=handler)
handler.setFormatter(formatter)
logger.addHandler(memory_handler)
# Validate settings variables
valid_settings = validate_settings_variables(skyline_app)
if not valid_settings:
print ('error :: invalid variables in settings.py - cannot start')
sys.exit(1)
# Make sure mysql is available
mysql_up = False
try:
configuration_error = True
# Try connect to mysql
try:
cnx = mysql.connector.connect(**config)
configuration_error = False
mysql_up = True
cnx.close()
except mysql.connector.Error as err:
if err.errno == errorcode.ER_ACCESS_DENIED_ERROR:
logger.error('error :: something is wrong with your user name or password')
elif err.errno == errorcode.ER_BAD_DB_ERROR:
logger.error('error :: the %s database does not exist' % settings.PANORAMA_DATABASE)
else:
logger.error('error :: mysql error - %s' % str(err))
except:
try:
if configuration_error:
print ('The database is not available')
except:
print ('The database is not available')
sys.exit(1)
if not mysql_up:
sys.exit(1)
luminosity = LuminosityAgent()
if len(sys.argv) > 1 and sys.argv[1] == 'run':
luminosity.run()
else:
daemon_runner = runner.DaemonRunner(luminosity)
daemon_runner.daemon_context.files_preserve = [handler.stream]
daemon_runner.do_action()