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1.1.1
by Rick Clark
Import upstream version 1.0.18 |
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import os |
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import time |
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from landscape.accumulate import Accumulator |
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from landscape.lib.monitor import CoverageMonitor |
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from landscape.monitor.monitor import MonitorPlugin |
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class LoadAverage(MonitorPlugin): |
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"""Plugin captures information about load average."""
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persist_name = "load-average" |
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# Prevent the Plugin base-class from scheduling looping calls.
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run_interval = None |
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def __init__(self, interval=15, monitor_interval=60*60, |
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create_time=time.time, get_load_average=os.getloadavg): |
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self._interval = interval |
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self._monitor_interval = monitor_interval |
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self._create_time = create_time |
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self._load_averages = [] |
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self._get_load_average = get_load_average |
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def register(self, registry): |
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super(LoadAverage, self).register(registry) |
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self._accumulate = Accumulator(self._persist, registry.step_size) |
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self.registry.reactor.call_every(self._interval, self.run) |
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self._monitor = CoverageMonitor(self._interval, 0.8, |
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"load average snapshot", |
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create_time=self._create_time) |
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self.registry.reactor.call_every(self._monitor_interval, |
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self._monitor.log) |
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self.registry.reactor.call_on("stop", self._monitor.log, priority=2000) |
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self.call_on_accepted("load-average", self.send_message, True) |
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def create_message(self): |
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load_averages = self._load_averages |
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self._load_averages = [] |
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return {"type": "load-average", "load-averages": load_averages} |
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def exchange(self, urgent=False): |
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self.registry.broker.call_if_accepted("load-average", |
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self.send_message, urgent) |
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def send_message(self, urgent=False): |
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message = self.create_message() |
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if len(message["load-averages"]): |
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self.registry.broker.send_message(message, urgent=urgent) |
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def exchange(self): |
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self.registry.broker.call_if_accepted("load-average", self.send_message) |
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def run(self): |
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self._monitor.ping() |
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new_timestamp = int(self._create_time()) |
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new_load_average = self._get_load_average()[0] |
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step_data = self._accumulate(new_timestamp, new_load_average, |
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"accumulate") |
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if step_data: |
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self._load_averages.append(step_data) |