35 lines
1.1 KiB
Python
35 lines
1.1 KiB
Python
import ntplib
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from monasca_agent.collector.checks import AgentCheck
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DEFAULT_NTP_VERSION = 3
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DEFAULT_TIMEOUT = 1 # in seconds
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DEFAULT_HOST = "pool.ntp.org"
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DEFAULT_PORT = "ntp"
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class NtpCheck(AgentCheck):
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"""Uses ntplib to grab a metric for the ntp offset
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"""
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def check(self, instance):
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dimensions = self._set_dimensions(None, instance)
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req_args = {
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'host': instance.get('host', DEFAULT_HOST),
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'port': instance.get('port', DEFAULT_PORT),
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'version': int(instance.get('version', DEFAULT_NTP_VERSION)),
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'timeout': float(instance.get('timeout', DEFAULT_TIMEOUT)),
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}
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try:
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ntp_stats = ntplib.NTPClient().request(**req_args)
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except ntplib.NTPException:
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self.log.error("Could not connect to NTP Server")
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raise
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else:
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ntp_offset = ntp_stats.offset
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# Use the ntp server's timestamp for the time of the result in
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# case the agent host's clock is messed up.
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ntp_ts = ntp_stats.recv_time
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self.gauge('ntp.offset', ntp_offset, timestamp=ntp_ts, dimensions=dimensions)
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