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agent.py
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agent.py
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#!/usr/bin/env python3.4
from optparse import OptionParser
import socket
from threading import Timer, Thread
#from multiprocessing import Process, Queue
import marshal
import asyncio
from queue import Queue
import os
from subprocess import Popen, PIPE
import shlex
import signal
from os import path, rename
import logging
from logger import logger, FORMAT, get_level
host = None
port = None
agent_id = None
out_dir = None
time_out = 60
timer = None
cmd_q = Queue()
def talk_to_server(data):
re_try = 10
while True:
try:
s = socket.socket()
s.connect((host, port))
try:
s.send(data)
finally:
s.close()
pass
break
except Exception as e:
logger.warning(str(e))
re_try -= 1
if re_try > 0:
pass
else:
raise e
def send_heart_beat():
global timer
data = {'cmd' : 'heart_beat',
'agent_id' : agent_id}
bs = marshal.dumps(data)
try:
talk_to_server(bs)
except Exception as e:
logger.error(e)
logger.error("connect send heartbeat to dv.py and susicide")
cleanup()
exit(-1)
timer = Timer(time_out, send_heart_beat)
timer.start()
class AgentProtocal(asyncio.Protocol):
def connection_made(self, transport):
self.transport = transport
def data_received(self, data):
msg = marshal.loads(data)
logger.debug('agent {} server received data {}'.format(agent_id, msg))
cmd_q.put(msg)
#self.transport.close()
server_host = None
server_port = None
def start_server(loop):
#loop = asyncio.get_event_loop()
server_host = socket.gethostname()
server_ip = socket.gethostbyname(server_host)
coro = loop.create_server(AgentProtocal, server_ip)
server = loop.run_until_complete(coro)
_, server_port = server.sockets[0].getsockname()
cmd_q.put((server_host, server_port))
loop.run_forever()
server.close()
loop.run_until_complete(server.wait_closed())
loop.close()
def get_cmd():
data = {'cmd' : 'require_cmd',
'agent_id' : agent_id,
'agent_host' : server_host,
'agent_port' : server_port}
bs = marshal.dumps(data)
talk_to_server(bs)
cmd_spec = cmd_q.get()
return cmd_spec
def send_status(msg):
data = {'cmd' : 'update_status',
'agent_id' : agent_id,
'msg' : msg}
bs = marshal.dumps(data)
talk_to_server(bs)
def cmd_done(exitcode, err):
data = {'cmd' : 'cmd_done',
'agent_id' : agent_id,
'exitcode' : exitcode,
'errmsg' : err}
bs = marshal.dumps(data)
talk_to_server(bs)
inferior_process = None
server_thread = None
def cleanup():
if inferior_process:
inferior_process.terminate()
#if server_thread:
# server_thread.terminate()
logging.shutdown()
def handler(signum, frame):
cleanup()
exit(-1)
#signal.signal(signal.SIGINT, handler)
#signal.signal(signal.SIGTERM, handler)
def run():
global inferior_process
global server_thread
global server_host
global server_port
global timer
timer = Timer(time_out, send_heart_beat)
timer.start()
loop = asyncio.get_event_loop()
server_thread = Thread(target=start_server, args=(loop,)).start()
server_host, server_port = cmd_q.get()
logger.info('server started on {}:{}'.format(server_host, server_port))
cwd = os.getcwd()
while True:
try:
os.chdir(cwd)
cmd_spec = get_cmd()
#send_status(cmd_spec)
if not cmd_spec:
next
cmd = cmd_spec['cmd']
logger.debug('got command '+cmd)
if cmd == 'terminate':
break
if 'dir' in cmd_spec:
path = cmd_spec['dir']
try:
os.makedirs(path)
except Exception as e:
pass
os.chdir(path)
args = shlex.split(cmd)
out = None
err = None
p = None
try:
p = Popen(args, stdout=PIPE, stderr=PIPE)
inferior_process = p
out, err = p.communicate()
except Exception as e:
err = str(e).encode()
if 'logfile' in cmd_spec:
logfile = os.path.abspath(cmd_spec['logfile'])
logdir = os.path.dirname(logfile)
if os.path.exists(logfile):
rename(logfile, (logfile+'.bak'))
try:
os.makedirs(logdir)
except Exception as e:
pass
try:
fh = open(logfile, 'w')
if out:
fh.write(out.decode())
if err:
fh.write(err.decode())
finally:
fh.close()
if p:
exitcode = p.returncode
else:
exitcode = -1
if out:
logger.info("command '{}' passed : {}".format(cmd, out.decode()))
if err:
logger.error("command '{}' failed : {}".format(cmd, err.decode()))
cmd_done(exitcode, err.decode())
except Exception as e:
#send_status(str(e))
logger.error(str(e))
pass
cleanup()
def main():
global host, port, agent_id, out_dir
p = OptionParser()
p.add_option('-m', '--host', dest='host',
help='specify host name')
p.add_option('-p', '--port', dest='port',
help='specify port')
p.add_option('-i', '--id', dest='id',
help='specify id name')
p.add_option('-o', '--out_dir', dest='out_dir',
help='specify output directory')
p.add_option('-v', '--verbose', dest='verbose', default='1',
help='specify verbose level')
(options, args) = p.parse_args()
host = options.host
port = int(options.port)
agent_id = options.id
out_dir = path.abspath(options.out_dir)
logger.setLevel(get_level(options.verbose))
agent_log = path.abspath(path.join(out_dir, 'agents', agent_id))
try:
os.makedirs(path.dirname(agent_log))
except Exception as e:
pass
if path.exists(agent_log):
rename(agent_log, (agent_log+'.bak'))
fh = logging.FileHandler(agent_log)
fh.setFormatter(logging.Formatter(FORMAT))
fh.setLevel(get_level(options.verbose))
logger.addHandler(fh)
run()
if __name__ == '__main__':
main()