155 lines
5.4 KiB
Plaintext
155 lines
5.4 KiB
Plaintext
This directory contains support for monitoring the local clock of xntp daemons.
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WARNING: The scripts and routines contained in this directory are bete realease!
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Do not depend on their correct operation. They are, however, in regular
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use at University of Erlangen-Nuernberg. No severe problems are known
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for this code.
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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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PLEASE THINK TWICE BEFORE STARTING MONITORING REMOTE XNTP DEAMONS !!!!
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MONITORING MAY INCREASE THE LOAD OF THE DEAMON MONITORED AND MAY
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INCREASE THE NETWORK LOAD SIGNIFICANTLY
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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Files are:
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README:
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This file
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ntptrap:
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perl script to log ntp mode 6 trap messages.
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It sends a set_trap request to each server given and dumps the
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trap messages received. It handles refresh of set_trap.
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Currently it handles only NTP V2, however the NTP V3 servers
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also accept v2 requests. It will not interpret v3 system and peer
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stati correctly.
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usage:
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ntptrap [-n] [-p <port>] [-l <debug-output>] servers...
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-n: do not send set_trap requests
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port: port to listen for responses
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useful if you have a configured trap
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debug-output: file to write trace output to (for debugging)
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This script convinced me that ntp trap messages are only of
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little use.
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ntploopstat:
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perl script to gather loop info statistics from xntpd via mode 7
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LOOP_INFO requests.
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This script collects data to allow monitoring of remote xntp servers
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where it is not possible to directly access the loopstats file
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produced by xntpd itself. Of course, it can be used to sample
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a local server if it is not configured to produce a loopstats file.
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Please note, this program poses a high load on the server as
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a communication takes place every delay seconds ! USE WITH CARE !
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usage:
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ntploopstat [-d<delay>] [-t<timeout>] [-l <logfile>] [-v] [ntpserver]
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delay: number of seconds to wait between samples
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default: 60 seconds
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timeout: number of seconds to wait for reply
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default 12 seconds
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logfile: file to log samples to
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default: loopstats:<ntpserver>:
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(note the trailing colon)
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This name actually is a prefix.
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The file name is dynamically derived by appending
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the name of the month the sample belongs to.
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Thus all samples of a month end up in the same file.
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the format of the files generated is identical to the format used by
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xntpd with the loopstats file:
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MJD <seconds since midnight UTC> offset frequency compliance
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if a timeout occurs the next sample is tried after delay/2 seconds
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The script will terminate after MAX_FAIL (currently 60) consecutive errors.
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Errors are counted for:
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- error on send call
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- error on select call
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- error on recv call
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- short packet received
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- bad packet
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- error on open for logfile
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ntploopwatch:
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perl script to display loop filter statistics collected by ntploopstat
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or dumped directly by xntpd.
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Gnuplot is used to produce a graphical representation of the sample
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values, that have been preprocessed and analysed by this script.
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It can either be called to produce a printout of specific data set or
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used to continously monitor the values. Monitoring is achieved by
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periodically reprocessing the logfiles, which are updated regularly
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either by a running ntploopstat process or by the running xntpd.
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usage:
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to watch statistics permanently:
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ntploopwatch [-v[<level>]] [-c <config-file>] [-d <working-dir>]
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to get a single print out specify also
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-P<printer> [-s<samples>]
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[-S <start-time>] [-E <end-time>]
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[-O <MaxOffs>] [-o <MinOffs>]
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level: level of verbosity for debugging
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config-file: file to read configurable settings from
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On each iteration it is checked and reread
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if it has been changed
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default: loopwatch.config
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working-dir: specify working directory for process, affects
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interpretation of relative file names
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All other flags are only useful with printing plots, as otherwise
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command line values would be replaced by settings from the config file.
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printer: specify printer to print plot
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BSD print systems semantics apply; if printer is omitted
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the name "ps" is used; plots are prepared using
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PostScript, thus the printer should best accept
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postscript input
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For the following see also the comments in loopwatch.config.SAMPLE
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samples: use last # samples from input data
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start-time: ignore input samples before this date
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end-time: ignore input samples after this date
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if both start-time and end-time are specified
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a given samples value is ignored
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MaxOffs:
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MinOffs: restrict value range
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loopwatch.config.SAMPLE:
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sample config file for ntploopwatch
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each configurable option is explained there
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lr.pl:
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linear regression package used by ntploopwatch to compute
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linear approximations for frequency and offset values
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within display range
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timelocal.pl:
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used during conversion of ISO_DATE_TIME values specified in loopwatch
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config files to unix epoch values (seconds since 1970-01-01_00:00_00 UTC)
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A version of this file is distributed with perl-4.x, however,
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it has a bug related to dates crossing 1970, causing endless loops..
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The version contained here has been fixed.
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ntp.pl:
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perl support for ntp v2 mode 6 message handling
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WARNING: This code is beta level - it triggers a memory leak;
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as for now it is not quite clear, wether this is caused by a
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bug in perl or by bad usage of perl within this script.
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