46 lines
1.4 KiB
Python
46 lines
1.4 KiB
Python
import json
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import etcd3 as etcd3
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from retrying import retry
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CLUSTER_INFO_KEY = '/syncthing_monitor/cluster_info'
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class EtcdClient:
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def __init__(self, host, port):
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self.etcd = etcd3.client(host=host, port=port)
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def load_cluster_info(self):
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raw_value = self.etcd.get(CLUSTER_INFO_KEY)[0]
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if raw_value is None:
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return {'devices': []}
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return json.loads(raw_value)
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@retry
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def add_device_to_cluster(self, device_id, hostname, address):
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with self.etcd.lock('syncthing_monitor'):
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cluster_info = self.load_cluster_info()
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if any(device_id in device['id'] for device in cluster_info['devices']):
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return
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new_device = {
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'id': device_id,
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'hostname': hostname,
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'address': address
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}
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cluster_info['devices'].append(new_device)
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print("Updating etcd value for '{0}': {1}".format(CLUSTER_INFO_KEY, json.dumps(cluster_info)))
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self.etcd.put(CLUSTER_INFO_KEY, json.dumps(cluster_info))
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@retry
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def get_device_list(self):
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device_list = self.load_cluster_info()['devices']
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print("Obtained device_list devices from etcd: {0}".format(json.dumps(device_list)))
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return device_list
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def register_device_update_handler(self, device_update_handler):
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self.etcd.add_watch_callback(CLUSTER_INFO_KEY, device_update_handler)
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