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43071bf488
Sometimes a metric previously reported from collectd is not available anymore. Previously, this caused scyllatop to log and exception to the user - which in effect destroyes the user experience and inhibits monitoring other metrics. This patch makes ScyllaTop handle this problem. It will display such metrics and 'not available', and exclude them from some and average computations. Closes issue #1287. Signed-off-by: Yoav Kleinberger <yoav@scylladb.com> Message-Id: <1465301178-27544-1-git-send-email-yoav@scylladb.com>
46 lines
1.2 KiB
Python
46 lines
1.2 KiB
Python
import metric
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import os
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import random
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import collectd
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import logging
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class FakeCollectd(object):
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def __init__(self, socketName):
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pass
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def query(self, command):
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pass
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Metric = metric.Metric
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if 'MARK_ABSENT_PROBABILITY' in os.environ:
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MARK_ABSENT_PROBABILITY = float(os.environ['MARK_ABSENT_PROBABILITY'])
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else:
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MARK_ABSENT_PROBABILITY = 0
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class FakeMetric(Metric):
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def update(self):
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self._status['value'] = random.randint(0, 100000)
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if random.random() > 1 - MARK_ABSENT_PROBABILITY:
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self.markAbsent()
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logging.info('{} {}'.format(self.symbol, self.status))
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@classmethod
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def discover(self, unused):
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results = []
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for cpu in range(4):
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results += [
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FakeMetric('localhost/cpu-{}/cache'.format(cpu), None),
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FakeMetric('localhost/cpu-{}/storage_proxy'.format(cpu), None),
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FakeMetric('localhost/cpu-{}/transport'.format(cpu), None)]
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for x in range(100):
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results.append(FakeMetric('localhost/fake_{}/{}'.format(x, random.choice('abcdefghijklmnopqrstuvwxyz')), None))
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return results
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def fake():
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metric.Metric = FakeMetric
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collectd.Collectd = FakeCollectd
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