forked from uncloud/uncloud
69 lines
1.9 KiB
Python
69 lines
1.9 KiB
Python
import time
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from datetime import datetime
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from os.path import join
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from typing import List
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from .classes import SpecificEtcdEntryBase
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class HostStatus:
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"""Possible Statuses of uncloud host."""
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alive = "ALIVE"
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dead = "DEAD"
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class HostEntry(SpecificEtcdEntryBase):
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"""Represents Host Entry Structure and its supporting methods."""
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def __init__(self, e):
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self.specs = None # type: dict
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self.hostname = None # type: str
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self.status = None # type: str
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self.last_heartbeat = None # type: str
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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().strftime("%Y-%m-%d %H:%M:%S")
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def is_alive(self):
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last_heartbeat = datetime.strptime(
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self.last_heartbeat, "%Y-%m-%d %H:%M:%S"
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)
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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 = time.strftime("%Y-%m-%d %H:%M:%S")
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class HostPool:
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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) -> List[HostEntry]:
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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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if not key.startswith(self.prefix):
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key = join(self.prefix, key)
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v = self.client.get(key, value_in_json=True)
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if v:
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return HostEntry(v)
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return None
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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))
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