56 lines
1.5 KiB
Python
56 lines
1.5 KiB
Python
from .helpers import SpecificEtcdEntryBase
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from .etcd3_wrapper import EtcdEntry
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from datetime import datetime
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class HostStatus(object):
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alive = "ALIVE"
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dead = "DEAD"
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class HostEntry(SpecificEtcdEntryBase):
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def __init__(self, e: EtcdEntry):
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self.specs = dict()
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self.hostname = ""
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self.status = ""
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self.last_heartbeat = ""
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super().__init__(e)
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def update_heartbeat(self):
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self.status = HostStatus.alive
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self.last_heartbeat = datetime.utcnow().isoformat()
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def is_alive(self):
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last_heartbeat = datetime.fromisoformat(self.last_heartbeat)
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delta = datetime.utcnow() - last_heartbeat
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if delta.total_seconds() > 60:
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return False
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return True
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def declare_dead(self):
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self.status = HostStatus.dead
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self.last_heartbeat = datetime.utcnow().isoformat()
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class HostPool(object):
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def __init__(self, etcd_client, host_prefix):
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self.client = etcd_client
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self.prefix = host_prefix
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@property
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def hosts(self):
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_hosts = self.client.get_prefix(self.prefix, value_in_json=True)
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return [HostEntry(host) for host in _hosts]
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def get(self, key):
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v = self.client.get(key, value_in_json=True)
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return HostEntry(v)
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def put(self, obj: HostEntry):
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self.client.put(obj.key, obj.value, value_in_json=True)
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def by_status(self, status, _hosts=None):
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if _hosts is None:
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_hosts = self.hosts
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return list(filter(lambda x: x.status == status, _hosts)) |