110 lines
3.7 KiB
Python
110 lines
3.7 KiB
Python
#!/usr/bin/env python
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import sentry_sdk
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import time
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import requests
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import requests.exceptions
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import os
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import redis
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import json
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import logging
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import socket
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"""
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Scheduler
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"""
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__author__ = "@kocsisr"
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__copyright__ = "Copyright 2020, GoldenPogácsa Team"
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__module_name__ = "app"
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__version__text__ = "1"
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sentry_sdk.init("https://0a106e104e114bc9a3fa47f9cb0db2f4@sentry.kmlabz.com/10")
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def main():
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# set logging preferences
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logging.basicConfig(filename='', level=logging.DEBUG)
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# connect to redis
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r = redis.Redis(host='localhost', port=6379, db=0)
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# set initial consumer addresses
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ip_list = os.environ['INITIAL_SERVERS'].split(',')
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logging.debug('Get consumer list from environ at first: Done')
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# get the dictionary of the currently available consumers
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consumer_list_redis = json.loads((r.get('consumer_list') or b'{}').decode('utf-8'))
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logging.debug('Get consumer list from redis at first: Done')
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temp_dict = {}
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host_name = socket.gethostname()
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current_ip = socket.gethostbyname(host_name)
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for ip in ip_list:
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try:
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# request synchronization
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response = requests.post(f"http://{ip}/sync", json={'uuid': os.environ['LOCAL_UUID']})
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except requests.exceptions.ConnectionError:
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continue
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if response.status_code == 200:
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temp_dict[response.json()['uuid']] = {'ip': ip}
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consumer_list_redis.update(temp_dict)
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r.set('consumer_list', json.dumps(consumer_list_redis).encode('utf-8'))
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logging.debug('Update redis consumers ip list from first answers: Done')
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while True:
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logging.debug('Infinite Cycle start : Done')
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# get the dictionary of the currently available consumers
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consumer_list_redis = json.loads((r.get('consumer_list') or b'{}').decode('utf-8'))
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logging.debug('Get consumer list from redis: Done')
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for uuid, info in consumer_list_redis.items():
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ip = info['ip']
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try:
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# request synchronization
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response = requests.post(f"http://{ip}/sync", json={'uuid': os.environ['LOCAL_UUID']})
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except requests.exceptions.ConnectionError:
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continue
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if response.status_code == 200:
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temp_dict[response.json()['uuid']] = {'ip': ip}
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# update the dictionary of the currently available consumers
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consumer_list_redis.update(temp_dict)
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r.set('consumer_list', json.dumps(consumer_list_redis).encode('utf-8'))
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logging.debug('Update redis consumer ip list from answers: Done')
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logging.debug('Waiting for next turn')
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# wait for the next update time
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if current_ip != socket.gethostbyname(host_name):
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logging.debug('IP changed. Pushing updates...')
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current_ip = socket.gethostbyname(host_name)
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keys = r.keys('producer_*')
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logging.debug(f'Pushing update to the following producers: ' + ', '.join(k.decode('utf-8') for k in keys))
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for key in keys:
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ip = r.get(key)
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if ip:
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ip = ip.decode('utf-8')
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else:
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continue
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try:
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response = requests.post(f"http://{ip}/ip", json={'uuid': os.environ['LOCAL_UUID'], 'ip': current_ip})
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logging.debug(f"Pushed update to {key.decode('utf-8')} at {ip}. Response: {response.status_code}")
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except requests.exceptions.ConnectionError as e:
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logging.warning(f"Could not push update to {key.decode('utf-8')}: {str(e)}")
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continue
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else:
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logging.debug('IP unchanged.')
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time.sleep(30)
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if __name__ == "__main__":
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try:
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main()
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except KeyboardInterrupt:
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pass
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