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105 lines
3.1 KiB
105 lines
3.1 KiB
import os
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import time
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import socket
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import threading
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from django.conf import settings
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from django.db.utils import OperationalError
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from common.db.utils import close_old_connections
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from common.decorator import Singleton
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from common.utils import get_disk_usage, get_cpu_load, get_memory_usage, get_logger
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from .serializers.terminal import TerminalRegistrationSerializer, StatusSerializer
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from .const import TerminalTypeChoices
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from .models.terminal import Terminal
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__all__ = ['CoreTerminal', 'CeleryTerminal']
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class BaseTerminal(object):
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def __init__(self, suffix_name, _type):
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server_hostname = os.environ.get('SERVER_HOSTNAME') or ''
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hostname = socket.gethostname()
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if server_hostname:
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name = f'[{suffix_name}]-{server_hostname}'
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else:
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name = f'[{suffix_name}]-{hostname}'
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self.name = name
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self.interval = 30
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self.remote_addr = self.get_remote_addr(hostname)
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self.type = _type
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@staticmethod
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def get_remote_addr(hostname):
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try:
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return socket.gethostbyname(hostname)
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except socket.gaierror:
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return '127.0.0.1'
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def start_heartbeat_thread(self):
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print(f'- Start heartbeat thread => ({self.name})')
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t = threading.Thread(target=self.start_heartbeat)
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t.setDaemon(True)
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t.start()
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def start_heartbeat(self):
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while True:
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heartbeat_data = {
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'cpu_load': get_cpu_load(),
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'memory_used': get_memory_usage(),
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'disk_used': get_disk_usage(path=settings.BASE_DIR),
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'sessions': [],
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}
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status_serializer = StatusSerializer(data=heartbeat_data)
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status_serializer.is_valid()
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status_serializer.validated_data.pop('sessions', None)
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terminal = self.get_or_register_terminal()
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status_serializer.validated_data['terminal'] = terminal
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try:
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status_serializer.save()
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time.sleep(self.interval)
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except OperationalError:
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close_old_connections()
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def get_or_register_terminal(self):
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terminal = Terminal.objects.filter(
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name=self.name, type=self.type, is_deleted=False
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).first()
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if not terminal:
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terminal = self.register_terminal()
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terminal.remote_addr = self.remote_addr
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terminal.save()
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return terminal
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def register_terminal(self):
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data = {
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'name': self.name, 'type': self.type,
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'remote_addr': self.remote_addr
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}
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serializer = TerminalRegistrationSerializer(data=data)
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serializer.is_valid()
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terminal = serializer.save()
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return terminal
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@Singleton
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class CoreTerminal(BaseTerminal):
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def __init__(self):
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super().__init__(
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suffix_name=TerminalTypeChoices.core.label,
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_type=TerminalTypeChoices.core.value
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)
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@Singleton
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class CeleryTerminal(BaseTerminal):
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def __init__(self):
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super().__init__(
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suffix_name=TerminalTypeChoices.celery.label,
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_type=TerminalTypeChoices.celery.value
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)
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