def initializeUnpickableData(self, log): if not hasattr(self, '_initialized'): Thread.__init__(self) self._initialized = True self.log = log self.alive = False self.ssh = SSH(self) self.ctrlChannel = None self.screenReader = None
class Host(Thread):
def __init__(self, rId, hostname, port, user, pw, log):
self.id = int(rId)
self.hostname = hostname
self.port = int(port)
# username
self.user = user
self.pw = pw
self.initializeUnpickableData(log)
# initialize all the data that doesn't get pickled
# this function has to be called when getting an object from memcahed
# to initialize the missing data
def initializeUnpickableData(self, log):
if not hasattr(self, '_initialized'):
Thread.__init__(self)
self._initialized = True
self.log = log
self.alive = False
self.ssh = SSH(self)
self.ctrlChannel = None
self.screenReader = None
def __getstate__(self):
return {
'id': self.id,
'hostname': self.hostname,
'port': self.port,
'user': self.user,
'pw': self.pw,
}
def __str__(self):
return "Host [id=%d, hostname=%s, port=%d, user=%s]" % (self.id, self.hostname, self.port, self.user)
def isConnected(self):
return self.ssh and self.ssh.isConnected()
def isAlive(self):
return self.alive
#@Override
def start(self, blocking=False):
if not self.alive:
self.log.debug('Starting %s' % str(self))
self.alive = True
if blocking:
self.connect()
Thread.start(self)
def stop(self):
if self.alive:
# put self.alive = False ontop
self.alive = False
self.disconnect()
self.log.debug('Stopping %s' % str(self))
def invokeShell(self):
if not self.ssh:
raise NoConnectionToHostException('SSH is not connected!')
return self.ssh.invokeShell()
def exec_command(self, cmd):
if not self.ssh:
raise NoConnectionToHostException('SSH is not connected!')
return self.ssh.exec_command(cmd)
# Connect / Disconnect are usually not called from outside but from the run method
def connect(self):
if not self.isConnected():
try:
self.ssh.connect()
except socket.timeout as e:
self.log.debug('Connection to %s timed out' % str(self))
return False
except Exception as e:
self.log.debug('Could not connect to %s' % str(self))
return False
try:
self.log.info('Connected to %s' % str(self))
EventHistory.hostOnline(self)
return True
except Exception as e:
self.log.exception('Could open control. Clossing %s' % str(self))
self.screenReader = None
self.disconnect()
return False
def disconnect(self):
if self.isConnected():
try:
self.log.debug('Closing ControlChannel')
self.ssh.disconnect()
self.log.info('Disconnected from %s' % str(self))
except Exception as e:
self.log.exception('Could not disconnect from %s\n' % str(self))
def run(self):
while self.alive:
if not self.isConnected():
if not self.connect():
# wait a certain amount of time before trying to reconnect
time.sleep(5)
else:
try:
delay = ping.do_one(self.hostname, 2)
if delay is None:
self.log.debug('Ping timed out, we probably lost the connection')
self.lostConnection()
#i,o,e = self.ssh.exec_command('uptime')
#print 'O: %s\tE: %s' % (o.read().strip(), e.read().strip())
except Exception as e:
print "* EXCEPTION :"
self.lostConnection()
time.sleep(1)
def lostConnection(self):
self.log.warning('Lost connection to %s' % str(self))
self.log.info ('Informing all components assigned to this host')
EventHistory.hostOffline(self)
self.ctrlChannel = None
self.screenReader = None
self.ssh.disconnect()
# Used for the webserver to send infomration to the client
def createJSONObj(self):
return {
'id': self.id,
'hostname': self.hostname,
'user': self.user,
'port': self.port
}
