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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (C) 2009-2020 Authors of CryptoMiniSat, see AUTHORS file
#
# 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.
from __future__ import print_function
import os
import socket
import sys
import struct
import pickle
import time
import pprint
import traceback
import Queue
import threading
import logging
import server_option_parser
# for importing in systems where "." is not in the PATH
sys.path.append(os.getcwd())
from common_aws import *
import RequestSpotClient
def get_n_bytes_from_connection(sock, MSGLEN):
chunks = []
bytes_recd = 0
while bytes_recd < MSGLEN:
chunk = sock.recv(min(MSGLEN - bytes_recd, 2048))
if chunk == '':
raise RuntimeError("socket connection broken")
chunks.append(chunk)
bytes_recd = bytes_recd + len(chunk)
return ''.join(chunks)
def send_command(sock, command, tosend=None):
# note, this is a python issue, we can't set above tosend={}
# https://nedbatchelder.com/blog/200806/pylint.html
tosend = tosend or {}
tosend["command"] = command
tosend = pickle.dumps(tosend)
tosend = struct.pack('!q', len(tosend)) + tosend
sock.sendall(tosend)
class ToSolve:
def __init__(self, num, name):
self.num = num
self.name = name
def __str__(self):
return "%s (num: %d)" % (self.name, self.num)
class Server (threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
self.files_available = []
self.files_finished = []
self.files = {}
logging.info("Getting list of files %s", options.cnf_list)
key = boto.connect_s3().get_bucket("msoos-solve-data").get_key("solvers/" + options.cnf_list)
key.get_contents_to_filename(options.cnf_list)
fnames = open(options.cnf_list, "r")
logging.info("CNF list is file %s", options.cnf_list)
num = 0
for fname in fnames:
fname = fname.strip()
self.files[num] = ToSolve(num, fname)
self.files_available.append(num)
logging.info("File added: %s", fname)
num = num+1
fnames.close()
self.files_running = {}
logging.info("Solving %d files", len(self.files_available))
self.uniq_cnt = 0
def ready_to_shutdown(self):
if len(self.files_available) > 0:
return False
if len(self.files_finished) < len(self.files):
return False
return True
def handle_done(self, connection, cli_addr, indata):
file_num = indata["file_num"]
logging.info("Finished with file %s (num %d), got files %s",
self.files[indata["file_num"]], indata["file_num"],
indata["files"])
self.files_finished.append(indata["file_num"])
if file_num in self.files_running:
del self.files_running[file_num]
logging.info("Num files_available: %d Num files_finished %d",
len(self.files_available), len(self.files_finished))
self.rename_files_to_final(indata["files"])
sys.stdout.flush()
def rename_files_to_final(self, files):
for fnames in files:
logging.info("Renaming file %s to %s", fnames[0], fnames[1])
ret = os.system("aws s3 mv s3://{bucket}/{origname} s3://{bucket}/{toname} --region {region}".format(
bucket=options.s3_bucket,
origname=fnames[0],
toname=fnames[1],
region=options.region))
if ret:
logging.warn("Renaming file to final name failed!")
def check_for_dead_files(self):
this_time = time.time()
files_to_remove_from_files_running = []
for file_num, starttime in self.files_running.items():
duration = this_time - starttime
# print("* death check. running:" , file_num, " duration: ",
# duration)
if duration > options.timeout_in_secs*options.tout_mult:
logging.warn("* dead file %s duration: %d re-inserting",
file_num, duration)
files_to_remove_from_files_running.append(file_num)
self.files_available.append(file_num)
for c in files_to_remove_from_files_running:
del self.files_running[c]
def find_something_to_solve(self):
self.check_for_dead_files()
logging.info("Num files_available pre-send: %d",
len(self.files_available))
if len(self.files_available) == 0:
return None
file_num = self.files_available[0]
del self.files_available[0]
logging.info("Num files_available post-send: %d",
len(self.files_available))
sys.stdout.flush()
return file_num
def handle_build(self, connection, cli_addr, indata):
tosend = self.default_tosend()
logging.info("Sending git revision %s to %s", options.git_rev,
cli_addr)
send_command(connection, "build_data", tosend)
def send_termination(self, connection, cli_addr):
tosend = {}
tosend["noshutdown"] = options.noshutdown
send_command(connection, "finish", tosend)
logging.info("No more to solve, terminating %s", cli_addr)
global last_termination_sent
last_termination_sent = time.time()
def send_wait(self, connection, cli_addr):
tosend = {}
tosend["noshutdown"] = options.noshutdown
logging.info("Everything is in sent queue, sending wait to %s", cli_addr)
send_command(connection, "wait", tosend)
def default_tosend(self):
tosend = {}
tosend["solver"] = options.solver
tosend["git_rev"] = options.git_rev
tosend["stats"] = options.stats
tosend["gauss"] = options.gauss
tosend["s3_bucket"] = options.s3_bucket
tosend["given_folder"] = options.given_folder
tosend["timeout_in_secs"] = options.timeout_in_secs
tosend["mem_limit_in_mb"] = options.mem_limit_in_mb
tosend["noshutdown"] = options.noshutdown
tosend["extra_opts"] = options.extra_opts
tosend["drat"] = options.drat
tosend["region"] = options.region
return tosend
def send_one_to_solve(self, connection, cli_addr, file_num):
# set timer that we have sent this to be solved
self.files_running[file_num] = time.time()
filename = self.files[file_num].name
tosend = self.default_tosend()
tosend["file_num"] = file_num
tosend["cnf_filename"] = filename
tosend["uniq_cnt"] = str(self.uniq_cnt)
logging.info("Sending file %s (num %d) to %s",
filename, file_num, cli_addr)
send_command(connection, "solve", tosend)
self.uniq_cnt += 1
def handle_need(self, connection, cli_addr, indata):
# TODO don't ignore 'indata' for solving CNF instances, use it to
# opitimize for uptime
file_num = self.find_something_to_solve()
if file_num is None:
if len(self.files_running) == 0:
self.send_termination(connection, cli_addr)
else:
self.send_wait(connection, cli_addr)
else:
self.send_one_to_solve(connection, cli_addr, file_num)
def handle_one_client(self, conn, cli_addr):
try:
logging.info("connection from %s", cli_addr)
data = get_n_bytes_from_connection(conn, 8)
length = struct.unpack('!q', data)[0]
data = get_n_bytes_from_connection(conn, length)
data = pickle.loads(data)
if data["command"] == "done":
self.handle_done(conn, cli_addr, data)
if data["command"] == "error":
shutdown(-1)
raise
elif data["command"] == "need":
self.handle_need(conn, cli_addr, data)
elif data["command"] == "build":
self.handle_build(conn, cli_addr, data)
sys.stdout.flush()
except:
exc_type, exc_value, exc_traceback = sys.exc_info()
traceback.print_exc()
the_trace = traceback.format_exc()
logging.error("Exception from %s, Trace: %s", cli_addr,
the_trace)
finally:
# Clean up the connection
logging.info("Finished with client %s", cli_addr)
conn.close()
def run(self):
global acc_queue
while True:
conn, cli_addr = acc_queue.get()
self.handle_one_client(conn, cli_addr)
class Listener (threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
def listen_to_connection(self):
# Create a TCP/IP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# Bind the socket to the port
server_address = ('0.0.0.0', options.port)
logging.info('starting up on %s port %s', server_address, options.port)
sock.bind(server_address)
# Listen for incoming connections
sock.listen(128)
return sock
def handle_one_connection(self):
global acc_queue
# Wait for a connection
conn, client_addr = self.sock.accept()
acc_queue.put_nowait((conn, client_addr))
def run(self):
try:
self.sock = self.listen_to_connection()
except:
exc_type, exc_value, exc_traceback = sys.exc_info()
the_trace = traceback.format_exc().rstrip().replace("\n", " || ")
logging.error("Cannot listen on stocket! Traceback: %s", the_trace)
shutdown(-1)
raise
while True:
self.handle_one_connection()
class SpotManager (threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
self.spot_creator = RequestSpotClient.RequestSpotClient(
options.git_rev,
("test" in options.cnf_list), noshutdown=options.noshutdown,
count=options.client_count)
def run(self):
while True:
try:
if not server.ready_to_shutdown():
self.spot_creator.create_spots_if_needed()
except:
exc_type, exc_value, exc_traceback = sys.exc_info()
the_trace = traceback.format_exc().rstrip().replace("\n", " || ")
logging.error("Cannot create spots! Traceback: %s", the_trace)
time.sleep(60)
def shutdown(exitval=0):
toexec = "sudo shutdown -h now"
logging.info("SHUTTING DOWN")
# send email
try:
email_subject = "Server shutting down "
if exitval == 0:
email_subject += "OK"
else:
email_subject += "FAIL"
full_s3_folder = get_s3_folder(
options.given_folder,
options.git_rev,
options.solver,
options.timeout_in_secs,
options.mem_limit_in_mb)
text = """Server finished. Please download the final data:
mkdir {0}
cd {0}
aws s3 cp --recursive s3://{1}/{0}/ .
Don't forget to:
* check volume
* check EC2 still running
So long and thanks for all the fish!
""".format(full_s3_folder, options.s3_bucket)
send_email(email_subject, text, options.logfile_name)
except:
exc_type, exc_value, exc_traceback = sys.exc_info()
the_trace = traceback.format_exc().rstrip().replace("\n", " || ")
logging.error("Cannot send email! Traceback: %s", the_trace)
if not options.noshutdown:
os.system(toexec)
exit(exitval)
def set_up_logging():
form = '[ %(asctime)-15s %(levelname)s %(message)s ]'
logformatter = logging.Formatter(form)
try:
os.unlink(options.logfile_name)
except:
pass
fileHandler = logging.FileHandler(options.logfile_name)
fileHandler.setFormatter(logformatter)
logging.getLogger().addHandler(fileHandler)
logging.getLogger().setLevel(logging.INFO)
if __name__ == "__main__":
global options
global args
options, args = server_option_parser.parse_arguments()
if options.drat:
assert "cryptominisat" in options.solver
global acc_queue
acc_queue = Queue.Queue()
last_termination_sent = None
set_up_logging()
logging.info("Server called with parameters: %s",
pprint.pformat(options, indent=4).replace("\n", " || "))
if not options.git_rev:
options.git_rev = get_revision(options.base_dir + options.solver, options.base_dir)
logging.info("Revision not given, taking HEAD: %s", options.git_rev)
server = Server()
listener = Listener()
spotmanager = SpotManager()
listener.setDaemon(True)
server.setDaemon(True)
spotmanager.setDaemon(True)
listener.start()
server.start()
time.sleep(20)
spotmanager.start()
while threading.active_count() > 0:
time.sleep(0.5)
if last_termination_sent is not None and server.ready_to_shutdown():
diff = time.time() - last_termination_sent
limit = 100
if diff > limit:
break
shutdown()
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