225 lines
8.0 KiB
Python
225 lines
8.0 KiB
Python
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#!/usr/bin/env python3
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# NodeInstance.py - Class implementing a PVC node in pvchealthd
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# Part of the Parallel Virtual Cluster (PVC) system
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#
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# Copyright (C) 2018-2022 Joshua M. Boniface <joshua@boniface.me>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, version 3.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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###############################################################################
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class NodeInstance(object):
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# Initialization function
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def __init__(
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self,
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name,
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zkhandler,
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config,
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logger,
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):
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# Passed-in variables on creation
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self.name = name
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self.zkhandler = zkhandler
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self.config = config
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self.logger = logger
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# States
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self.daemon_state = "stop"
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self.coordinator_state = "client"
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self.domain_state = "flushed"
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# Node resources
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self.health = 100
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self.active_domains_count = 0
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self.provisioned_domains_count = 0
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self.memused = 0
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self.memfree = 0
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self.memalloc = 0
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self.vcpualloc = 0
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# Zookeeper handlers for changed states
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@self.zkhandler.zk_conn.DataWatch(
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self.zkhandler.schema.path("node.state.daemon", self.name)
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)
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def watch_node_daemonstate(data, stat, event=""):
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if event and event.type == "DELETED":
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# The key has been deleted after existing before; terminate this watcher
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# because this class instance is about to be reaped in Daemon.py
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return False
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try:
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data = data.decode("ascii")
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except AttributeError:
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data = "stop"
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if data != self.daemon_state:
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self.daemon_state = data
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@self.zkhandler.zk_conn.DataWatch(
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self.zkhandler.schema.path("node.state.router", self.name)
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)
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def watch_node_routerstate(data, stat, event=""):
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if event and event.type == "DELETED":
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# The key has been deleted after existing before; terminate this watcher
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# because this class instance is about to be reaped in Daemon.py
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return False
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try:
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data = data.decode("ascii")
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except AttributeError:
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data = "client"
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if data != self.coordinator_state:
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self.coordinator_state = data
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@self.zkhandler.zk_conn.DataWatch(
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self.zkhandler.schema.path("node.state.domain", self.name)
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)
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def watch_node_domainstate(data, stat, event=""):
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if event and event.type == "DELETED":
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# The key has been deleted after existing before; terminate this watcher
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# because this class instance is about to be reaped in Daemon.py
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return False
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try:
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data = data.decode("ascii")
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except AttributeError:
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data = "unknown"
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if data != self.domain_state:
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self.domain_state = data
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@self.zkhandler.zk_conn.DataWatch(
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self.zkhandler.schema.path("node.monitoring.health", self.name)
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)
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def watch_node_health(data, stat, event=""):
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if event and event.type == "DELETED":
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# The key has been deleted after existing before; terminate this watcher
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# because this class instance is about to be reaped in Daemon.py
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return False
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try:
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data = data.decode("ascii")
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except AttributeError:
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data = 100
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try:
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data = int(data)
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except ValueError:
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pass
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if data != self.health:
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self.health = data
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@self.zkhandler.zk_conn.DataWatch(
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self.zkhandler.schema.path("node.memory.free", self.name)
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)
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def watch_node_memfree(data, stat, event=""):
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if event and event.type == "DELETED":
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# The key has been deleted after existing before; terminate this watcher
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# because this class instance is about to be reaped in Daemon.py
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return False
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try:
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data = data.decode("ascii")
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except AttributeError:
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data = 0
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if data != self.memfree:
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self.memfree = data
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@self.zkhandler.zk_conn.DataWatch(
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self.zkhandler.schema.path("node.memory.used", self.name)
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)
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def watch_node_memused(data, stat, event=""):
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if event and event.type == "DELETED":
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# The key has been deleted after existing before; terminate this watcher
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# because this class instance is about to be reaped in Daemon.py
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return False
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try:
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data = data.decode("ascii")
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except AttributeError:
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data = 0
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if data != self.memused:
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self.memused = data
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@self.zkhandler.zk_conn.DataWatch(
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self.zkhandler.schema.path("node.memory.allocated", self.name)
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)
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def watch_node_memalloc(data, stat, event=""):
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if event and event.type == "DELETED":
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# The key has been deleted after existing before; terminate this watcher
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# because this class instance is about to be reaped in Daemon.py
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return False
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try:
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data = data.decode("ascii")
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except AttributeError:
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data = 0
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if data != self.memalloc:
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self.memalloc = data
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@self.zkhandler.zk_conn.DataWatch(
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self.zkhandler.schema.path("node.vcpu.allocated", self.name)
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)
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def watch_node_vcpualloc(data, stat, event=""):
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if event and event.type == "DELETED":
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# The key has been deleted after existing before; terminate this watcher
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# because this class instance is about to be reaped in Daemon.py
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return False
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try:
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data = data.decode("ascii")
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except AttributeError:
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data = 0
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if data != self.vcpualloc:
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self.vcpualloc = data
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@self.zkhandler.zk_conn.DataWatch(
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self.zkhandler.schema.path("node.running_domains", self.name)
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)
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def watch_node_runningdomains(data, stat, event=""):
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if event and event.type == "DELETED":
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# The key has been deleted after existing before; terminate this watcher
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# because this class instance is about to be reaped in Daemon.py
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return False
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try:
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data = data.decode("ascii").split()
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except AttributeError:
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data = []
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if len(data) != self.active_domains_count:
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self.active_domains_count = len(data)
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@self.zkhandler.zk_conn.DataWatch(
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self.zkhandler.schema.path("node.count.provisioned_domains", self.name)
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)
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def watch_node_domainscount(data, stat, event=""):
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if event and event.type == "DELETED":
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# The key has been deleted after existing before; terminate this watcher
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# because this class instance is about to be reaped in Daemon.py
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return False
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try:
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data = data.decode("ascii")
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except AttributeError:
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data = 0
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if data != self.provisioned_domains_count:
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self.provisioned_domains_count = data
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