91 lines
3.4 KiB
Python
91 lines
3.4 KiB
Python
import urllib2
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from monagent.collector.checks import AgentCheck
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from monagent.collector.checks.utils import add_basic_auth
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from monagent.common.util import headers
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class Apache(AgentCheck):
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"""Tracks basic connection/requests/workers metrics
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See http://httpd.apache.org/docs/2.2/mod/mod_status.html for more details
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"""
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GAUGES = {
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'IdleWorkers': 'apache.performance.idle_workers',
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'BusyWorkers': 'apache.performance.busy_workers',
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'CPULoad': 'apache.performance.cpu_load',
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'Uptime': 'apache.performance.uptime',
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'Total kBytes': 'apache.net.bytes',
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'Total Accesses': 'apache.net.hits',
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}
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RATES = {
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'Total kBytes': 'apache.net.bytes_per_s',
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'Total Accesses': 'apache.net.request_per_s'
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}
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def __init__(self, name, init_config, agent_config, instances=None):
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AgentCheck.__init__(self, name, init_config, agent_config, instances)
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self.assumed_url = {}
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def check(self, instance):
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if 'apache_status_url' not in instance:
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raise Exception("Missing 'apache_status_url' in Apache config")
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url = self.assumed_url.get(instance['apache_status_url'], instance['apache_status_url'])
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dimensions = instance.get('dimensions', {})
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req = urllib2.Request(url, None, headers(self.agent_config))
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if 'apache_user' in instance and 'apache_password' in instance:
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add_basic_auth(req, instance['apache_user'], instance['apache_password'])
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request = urllib2.urlopen(req)
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response = request.read()
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metric_count = 0
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# Loop through and extract the numerical values
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for line in response.split('\n'):
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values = line.split(': ')
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if len(values) == 2: # match
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metric, value = values
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try:
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value = float(value)
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except ValueError:
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continue
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# Special case: kBytes => bytes
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if metric == 'Total kBytes':
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value *= 1024
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# Send metric as a gauge, if applicable
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if metric in self.GAUGES:
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metric_count += 1
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metric_name = self.GAUGES[metric]
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self.gauge(metric_name, value, dimensions=dimensions)
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# Send metric as a rate, if applicable
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if metric in self.RATES:
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metric_count += 1
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metric_name = self.RATES[metric]
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self.rate(metric_name, value, dimensions=dimensions)
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if metric_count == 0:
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if self.assumed_url.get(
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instance['apache_status_url'], None) is None and url[-5:] != '?auto':
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self.assumed_url[instance['apache_status_url']] = '%s?auto' % url
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self.warning("Assuming url was not correct. Trying to add ?auto suffix to the url")
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self.check(instance)
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else:
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raise Exception(
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"No metrics were fetched for this instance. Make sure that %s is the proper url." %
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instance['apache_status_url'])
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@staticmethod
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def parse_agent_config(agentConfig):
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if not agentConfig.get('apache_status_url'):
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return False
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return {
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'instances': [{'apache_status_url': agentConfig.get('apache_status_url')}]
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}
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