131 lines
4.6 KiB
Python
131 lines
4.6 KiB
Python
#!/usr/bin/env python
|
|
import sentry_sdk
|
|
import time
|
|
import requests
|
|
import requests.exceptions
|
|
import os
|
|
import redis
|
|
import json
|
|
import logging
|
|
import socket
|
|
|
|
"""
|
|
Scheduler
|
|
"""
|
|
|
|
__author__ = "@kocsisr"
|
|
__copyright__ = "Copyright 2020, GoldenPogácsa Team"
|
|
__module_name__ = "app"
|
|
__version__text__ = "1"
|
|
|
|
sentry_sdk.init("https://0a106e104e114bc9a3fa47f9cb0db2f4@sentry.kmlabz.com/10")
|
|
|
|
|
|
def main():
|
|
# set logging preferences
|
|
logging.basicConfig(filename='', level=logging.DEBUG)
|
|
|
|
# connect to redis
|
|
r = redis.from_url(os.environ.get('REDIS_URL', "redis://localhost:6379/0"))
|
|
|
|
# set initial consumer addresses
|
|
ip_list = os.environ['INITIAL_SERVERS'].split(',')
|
|
logging.debug('Get consumer list from environ at first: Done')
|
|
# get the dictionary of the currently available consumers
|
|
consumer_list_redis = json.loads((r.get('consumer_list') or b'{}').decode('utf-8'))
|
|
logging.debug('Get consumer list from redis at first: Done')
|
|
temp_dict = {}
|
|
|
|
host_name = socket.gethostname()
|
|
|
|
for ip in ip_list:
|
|
try:
|
|
# request synchronization
|
|
response = requests.post(f"http://{ip}/sync", json={'uuid': os.environ['LOCAL_UUID']}, timeout=5)
|
|
except (requests.exceptions.ConnectionError, requests.exceptions.Timeout) as e:
|
|
logging.error(f"Error while syncing to {ip}: {str(e)}")
|
|
continue
|
|
|
|
if response.status_code == 200:
|
|
temp_dict[response.json()['uuid']] = {'ip': ip}
|
|
|
|
consumer_list_redis.update(temp_dict)
|
|
r.set('consumer_list', json.dumps(consumer_list_redis).encode('utf-8'))
|
|
logging.debug('Update redis consumers ip list from first answers: Done')
|
|
while True:
|
|
logging.debug('Infinite Cycle start : Done')
|
|
# get the dictionary of the currently available consumers
|
|
consumer_list_redis = json.loads((r.get('consumer_list') or b'{}').decode('utf-8'))
|
|
logging.debug('Get consumer list from redis: Done')
|
|
|
|
temp_dict = {}
|
|
for uuid, info in consumer_list_redis.items():
|
|
ip = info['ip']
|
|
try:
|
|
# request synchronization
|
|
response = requests.post(f"http://{ip}/sync", json={'uuid': os.environ['LOCAL_UUID']}, timeout=5)
|
|
except (requests.exceptions.ConnectionError, requests.exceptions.Timeout) as e:
|
|
logging.error(f"Error while syncing to {ip}: {str(e)}")
|
|
continue
|
|
|
|
if response.status_code == 200:
|
|
temp_dict[response.json()['uuid']] = {'ip': ip}
|
|
|
|
# update the dictionary of the currently available consumers
|
|
consumer_list_redis.update(temp_dict)
|
|
r.set('consumer_list', json.dumps(consumer_list_redis).encode('utf-8'))
|
|
logging.debug('Update redis consumer ip list from answers: Done')
|
|
|
|
# Test ip change stuff
|
|
|
|
old_ip = r.get('current_ip')
|
|
|
|
if old_ip:
|
|
old_ip = old_ip.decode('utf-8')
|
|
|
|
current_ip = socket.gethostbyname(host_name)
|
|
|
|
|
|
if not old_ip: # Not set yet. I this case no update required
|
|
r.set('current_ip', current_ip.encode('utf-8'))
|
|
logging.debug(f"Previous info about the ip address could not be found! Current: {current_ip}")
|
|
|
|
elif old_ip != current_ip:
|
|
logging.info(f'IP changed: {old_ip} -> {current_ip} Pushing updates...')
|
|
r.set('current_ip', current_ip.encode('utf-8'))
|
|
|
|
# pushing updates...
|
|
keys = r.keys('producer_*')
|
|
|
|
logging.debug(f'Pushing update to the following producers: ' + ', '.join(k.decode('utf-8') for k in keys))
|
|
|
|
for key in keys:
|
|
ip = r.get(key)
|
|
if ip:
|
|
ip = ip.decode('utf-8')
|
|
else:
|
|
continue
|
|
|
|
try:
|
|
response = requests.post(
|
|
f"http://{ip}/ip",
|
|
json={'uuid': os.environ['LOCAL_UUID'], 'ip': current_ip},
|
|
timeout=5
|
|
)
|
|
logging.debug(f"Pushed update to {key.decode('utf-8')} at {ip}. Response: {response.status_code}")
|
|
except (requests.exceptions.ConnectionError, requests.exceptions.Timeout) as e:
|
|
logging.warning(f"Could not push update to {key.decode('utf-8')}: {str(e)}")
|
|
continue
|
|
else:
|
|
logging.debug(f'IP unchanged: {current_ip}')
|
|
|
|
logging.debug('Waiting for next turn')
|
|
time.sleep(os.environ.get("RUN_INTERVAL", 30))
|
|
|
|
|
|
if __name__ == "__main__":
|
|
try:
|
|
main()
|
|
except KeyboardInterrupt:
|
|
pass
|