mirror of
https://gitlab.com/crafty-controller/crafty-4.git
synced 2024-08-30 18:23:09 +00:00
344 lines
13 KiB
Python
344 lines
13 KiB
Python
import os
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import sys
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import re
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import json
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import time
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import psutil
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import pexpect
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import datetime
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import threading
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import schedule
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import logging.config
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import zipfile
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from app.classes.shared.helpers import helper
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from app.classes.shared.console import console
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from app.classes.shared.models import db_helper, Servers
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logger = logging.getLogger(__name__)
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try:
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import pexpect
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except ModuleNotFoundError as e:
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logger.critical("Import Error: Unable to load {} module".format(e.name), exc_info=True)
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console.critical("Import Error: Unable to load {} module".format(e.name))
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sys.exit(1)
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class Server:
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def __init__(self, stats):
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# holders for our process
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self.process = None
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self.line = False
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self.PID = None
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self.start_time = None
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self.server_command = None
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self.server_path = None
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self.server_thread = None
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self.settings = None
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self.updating = False
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self.server_id = None
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self.name = None
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self.is_crashed = False
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self.restart_count = 0
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self.crash_watcher_schedule = None
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self.stats = stats
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def reload_server_settings(self):
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server_data = db_helper.get_server_data_by_id(self.server_id)
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self.settings = server_data
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def do_server_setup(self, server_data_obj):
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logger.info('Creating Server object: {} | Server Name: {} | Auto Start: {}'.format(
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server_data_obj['server_id'],
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server_data_obj['server_name'],
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server_data_obj['auto_start']
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))
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self.server_id = server_data_obj['server_id']
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self.name = server_data_obj['server_name']
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self.settings = server_data_obj
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# build our server run command
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self.setup_server_run_command()
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if server_data_obj['auto_start']:
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delay = int(self.settings['auto_start_delay'])
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logger.info("Scheduling server {} to start in {} seconds".format(self.name, delay))
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console.info("Scheduling server {} to start in {} seconds".format(self.name, delay))
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schedule.every(delay).seconds.do(self.run_scheduled_server)
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def run_scheduled_server(self):
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console.info("Starting server ID: {} - {}".format(self.server_id, self.name))
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logger.info("Starting server {}".format(self.server_id, self.name))
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self.run_threaded_server()
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# remove the scheduled job since it's ran
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return schedule.CancelJob
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def run_threaded_server(self):
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# start the server
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self.server_thread = threading.Thread(target=self.start_server, daemon=True)
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self.server_thread.start()
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def setup_server_run_command(self):
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# configure the server
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server_exec_path = self.settings['executable']
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self.server_command = self.settings['execution_command']
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self.server_path = self.settings['path']
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# let's do some quick checking to make sure things actually exists
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full_path = os.path.join(self.server_path, server_exec_path)
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if not helper.check_file_exists(full_path):
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logger.critical("Server executable path: {} does not seem to exist".format(full_path))
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console.critical("Server executable path: {} does not seem to exist".format(full_path))
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helper.do_exit()
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if not helper.check_path_exists(self.server_path):
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logger.critical("Server path: {} does not seem to exits".format(self.server_path))
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console.critical("Server path: {} does not seem to exits".format(self.server_path))
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helper.do_exit()
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if not helper.check_writeable(self.server_path):
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logger.critical("Unable to write/access {}".format(self.server_path))
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console.warning("Unable to write/access {}".format(self.server_path))
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helper.do_exit()
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def start_server(self):
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# fail safe in case we try to start something already running
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if self.check_running():
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logger.error("Server is already running - Cancelling Startup")
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console.error("Server is already running - Cancelling Startup")
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return False
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logger.info("Launching Server {} with command {}".format(self.name, self.server_command))
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console.info("Launching Server {} with command {}".format(self.name, self.server_command))
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if os.name == "nt":
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logger.info("Windows Detected")
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self.server_command = self.server_command.replace('\\', '/')
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else:
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logger.info("Linux Detected")
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logger.info("Starting server in {p} with command: {c}".format(p=self.server_path, c=self.server_command))
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self.process = pexpect.spawn(self.server_command, cwd=self.server_path, timeout=None, encoding=None)
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self.is_crashed = False
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# see https://docs.python.org/3/library/datetime.html#datetime.datetime.now
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self.start_time = str(datetime.datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S'))
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if psutil.pid_exists(self.process.pid):
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self.PID = self.process.pid
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logger.info("Server {} running with PID {}".format(self.name, self.PID))
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console.info("Server {} running with PID {}".format(self.name, self.PID))
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self.is_crashed = False
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self.stats.record_stats()
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else:
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logger.warning("Server PID {} died right after starting - is this a server config issue?".format(self.PID))
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console.warning("Server PID {} died right after starting - is this a server config issue?".format(self.PID))
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if self.settings['crash_detection']:
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logger.info("Server {} has crash detection enabled - starting watcher task".format(self.name))
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console.info("Server {} has crash detection enabled - starting watcher task".format(self.name))
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self.crash_watcher_schedule = schedule.every(30).seconds.do(self.detect_crash).tag(self.name)
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def stop_threaded_server(self):
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self.stop_server()
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if self.server_thread:
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self.server_thread.join()
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def stop_server(self):
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if self.settings['stop_command']:
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self.send_command(self.settings['stop_command'])
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running = self.check_running()
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x = 0
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# caching the name and pid number
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server_name = self.name
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server_pid = self.PID
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while running:
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x = x+1
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logger.info("Server {} is still running - waiting 2s to see if it stops".format(server_name))
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console.info("Server {} is still running - waiting 2s to see if it stops".format(server_name))
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console.info("Server has {} seconds to respond before we force it down".format(int(60-(x*2))))
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running = self.check_running()
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time.sleep(2)
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# if we haven't closed in 60 seconds, let's just slam down on the PID
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if x >= 30:
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logger.info("Server {} is still running - Forcing the process down".format(server_name))
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console.info("Server {} is still running - Forcing the process down".format(server_name))
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self.process.terminate(force=True)
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logger.info("Stopped Server {} with PID {}".format(server_name, server_pid))
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console.info("Stopped Server {} with PID {}".format(server_name, server_pid))
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else:
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self.process.terminate(force=True)
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# massive resetting of variables
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self.cleanup_server_object()
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self.stats.record_stats()
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def restart_threaded_server(self):
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# if not already running, let's just start
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if not self.check_running():
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self.run_threaded_server()
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else:
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self.stop_threaded_server()
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time.sleep(2)
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self.run_threaded_server()
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def cleanup_server_object(self):
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self.PID = None
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self.start_time = None
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self.restart_count = 0
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self.is_crashed = False
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self.updating = False
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self.process = None
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def check_running(self):
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running = False
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# if process is None, we never tried to start
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if self.PID is None:
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return running
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try:
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alive = self.process.isalive()
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if type(alive) is not bool:
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self.last_rc = alive
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running = False
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else:
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running = alive
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except Exception as e:
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logger.error("Unable to find if server PID exists: {}".format(self.PID), exc_info=True)
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pass
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return running
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def send_command(self, command):
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if not self.check_running() and command.lower() != 'start':
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logger.warning("Server not running, unable to send command \"{}\"".format(command))
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return False
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logger.debug("Sending command {} to server via pexpect".format(command))
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# send it
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self.process.send(command + '\n')
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def crash_detected(self, name):
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# clear the old scheduled watcher task
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self.remove_watcher_thread()
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# the server crashed, or isn't found - so let's reset things.
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logger.warning("The server {} seems to have vanished unexpectedly, did it crash?".format(name))
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if self.settings['crash_detection']:
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logger.warning("The server {} has crashed and will be restarted. Restarting server".format(name))
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console.warning("The server {} has crashed and will be restarted. Restarting server".format(name))
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self.run_threaded_server()
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return True
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else:
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logger.critical(
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"The server {} has crashed, crash detection is disabled and it will not be restarted".format(name))
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console.critical(
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"The server {} has crashed, crash detection is disabled and it will not be restarted".format(name))
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return False
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def killpid(self, pid):
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logger.info("Terminating PID {} and all child processes".format(pid))
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process = psutil.Process(pid)
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# for every sub process...
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for proc in process.children(recursive=True):
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# kill all the child processes - it sounds too wrong saying kill all the children (kevdagoat: lol!)
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logger.info("Sending SIGKILL to PID {}".format(proc.name))
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proc.kill()
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# kill the main process we are after
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logger.info('Sending SIGKILL to parent')
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process.kill()
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def get_start_time(self):
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if self.check_running():
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return self.start_time
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else:
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return False
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def detect_crash(self):
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logger.info("Detecting possible crash for server: {} ".format(self.name))
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running = self.check_running()
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# if all is okay, we just exit out
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if running:
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return
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# if we haven't tried to restart more 3 or more times
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if self.restart_count <= 3:
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# start the server if needed
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server_restarted = self.crash_detected(self.name)
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if server_restarted:
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# add to the restart count
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self.restart_count = self.restart_count + 1
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# we have tried to restart 4 times...
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elif self.restart_count == 4:
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logger.critical("Server {} has been restarted {} times. It has crashed, not restarting.".format(
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self.name, self.restart_count))
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console.critical("Server {} has been restarted {} times. It has crashed, not restarting.".format(
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self.name, self.restart_count))
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# set to 99 restart attempts so this elif is skipped next time. (no double logging)
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self.restart_count = 99
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self.is_crashed = True
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# cancel the watcher task
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self.remove_watcher_thread()
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def remove_watcher_thread(self):
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logger.info("Removing old crash detection watcher thread")
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console.info("Removing old crash detection watcher thread")
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schedule.clear(self.name)
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def backup_server(self):
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logger.info("Starting server {} (ID {}) backup".format(self.name, self.server_id))
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conf = db_helper.get_backup_config(self.server_id)
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try:
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backup_filename = "{}/{}.zip".format(conf['backup_path'], datetime.datetime.now().strftime('%Y-%m-%d_%H-%M-%S'))
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logger.info("Creating backup of server '{}' (ID#{}) at '{}'".format(self.settings['server_name'], self.server_id, backup_filename))
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helper.zip_directory(backup_filename, self.server_path)
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backup_list = self.list_backups()
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if len(self.list_backups()) > conf["max_backups"]:
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oldfile = backup_list[0]
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logger.info("Removing old backup '{}'".format(oldfile))
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os.remove(oldfile)
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except:
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logger.exception("Failed to create backup of server {} (ID {})".format(self.name, self.server_id))
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def list_backups(self):
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conf = db_helper.get_backup_config(self.server_id)
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if helper.check_path_exists(self.settings['backup_path']):
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files = helper.get_human_readable_files_sizes(helper.list_dir_by_date(self.settings['backup_path']))
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return [{"path": os.path.relpath(f['path'], start=conf['backup_path']), "size": f["size"]} for f in files]
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else:
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return []
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