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Diffstat (limited to 'plugins-scripts/check_ntp.pl')
-rwxr-xr-x | plugins-scripts/check_ntp.pl | 471 |
1 files changed, 471 insertions, 0 deletions
diff --git a/plugins-scripts/check_ntp.pl b/plugins-scripts/check_ntp.pl new file mode 100755 index 00000000..cdcbffac --- /dev/null +++ b/plugins-scripts/check_ntp.pl @@ -0,0 +1,471 @@ +#!/usr/bin/perl -w +# +# (c)1999 Ian Cass, Knowledge Matters Ltd. +# Read the GNU copyright stuff for all the legalese +# +# Check NTP time servers plugin. This plugin requires the ntpdate utility to +# be installed on the system, however since it's part of the ntp suite, you +# should already have it installed. +# +# +# Nothing clever done in this program - its a very simple bare basics hack to +# get the job done. +# +# Things to do... +# check @words[9] for time differences greater than +/- x secs & return a +# warning. +# +# (c) 1999 Mark Jewiss, Knowledge Matters Limited +# 22-9-1999, 12:45 +# +# Modified script to accept 2 parameters or set defaults. +# Now issues warning or critical alert is time difference is greater than the +# time passed. +# +# These changes have not been tested completely due to the unavailability of a +# server with the incorrect time. +# +# (c) 1999 Bo Kersey, VirCIO - Managed Server Solutions <bo@vircio.com> +# 22-10-99, 12:17 +# +# Modified the script to give useage if no parameters are input. +# +# Modified the script to check for negative as well as positive +# time differences. +# +# Modified the script to work with ntpdate 3-5.93e Wed Apr 14 20:23:03 EDT 1999 +# +# Modified the script to work with ntpdate's that return adjust or offset... +# +# +# Script modified 2000 June 01 by William Pietri <william@bianca.com> +# +# Modified script to handle weird cases: +# o NTP server doesn't respond (e.g., has died) +# o Server has correct time but isn't suitable synchronization +# source. This happens while starting up and if contact +# with master has been lost. +# +# Modifed to run under Embedded Perl (sghosh@users.sf.net) +# - combined logic some blocks together.. +# +# Added ntpdate check for stratum 16 desynch peer (James Fidell) Feb 03, 2003 +# +# ntpdate - offset is in seconds +# changed ntpdc to ntpq - jitter/dispersion is in milliseconds +# +# Patch for for regex for stratum1 refid. + +require 5.004; +use POSIX; +use strict; +use Getopt::Long; +use vars qw($opt_V $opt_h $opt_H $opt_t $opt_w $opt_c $opt_O $opt_j $opt_k $verbose $PROGNAME $def_jitter $ipv4 $ipv6); +use lib utils.pm; +use utils qw($TIMEOUT %ERRORS &print_revision &support); + +$PROGNAME="check_ntp"; + +sub print_help (); +sub print_usage (); + +$ENV{'PATH'}='@trusted_path@'; +$ENV{'BASH_ENV'}=''; +$ENV{'ENV'}=''; + +# defaults in sec +my $DEFAULT_OFFSET_WARN = 60; # 1 minute +my $DEFAULT_OFFSET_CRIT = 120; # 2 minutes +# default in millisec +my $DEFAULT_JITTER_WARN = 5000; # 5 sec +my $DEFAULT_JITTER_CRIT = 10000; # 10 sec + +Getopt::Long::Configure('bundling'); +GetOptions + ("V" => \$opt_V, "version" => \$opt_V, + "h" => \$opt_h, "help" => \$opt_h, + "v" => \$verbose, "verbose" => \$verbose, + "4" => \$ipv4, "use-ipv4" => \$ipv4, + "6" => \$ipv6, "use-ipv6" => \$ipv6, + "w=f" => \$opt_w, "warning=f" => \$opt_w, # offset|adjust warning if above this number + "c=f" => \$opt_c, "critical=f" => \$opt_c, # offset|adjust critical if above this number + "O" => \$opt_O, "zero-offset" => \$opt_O, # zero-offset bad + "j=s" => \$opt_j, "jwarn=i" => \$opt_j, # jitter warning if above this number + "k=s" => \$opt_k, "jcrit=i" => \$opt_k, # jitter critical if above this number + "t=s" => \$opt_t, "timeout=i" => \$opt_t, + "H=s" => \$opt_H, "hostname=s" => \$opt_H); + +if ($opt_V) { + print_revision($PROGNAME,'@NP_VERSION@'); + exit $ERRORS{'OK'}; +} + +if ($opt_h) { + print_help(); + exit $ERRORS{'OK'}; +} + +# jitter test params specified +if (defined $opt_j || defined $opt_k ) { + $def_jitter = 1; +} + +$opt_H = shift unless ($opt_H); +my $host = $1 if ($opt_H && $opt_H =~ m/^([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+|[a-zA-Z][-a-zA-Z0-9]+(\.[a-zA-Z][-a-zA-Z0-9]+)*)$/); +unless ($host) { + print "No target host specified\n"; + print_usage(); + exit $ERRORS{'UNKNOWN'}; +} + +my ($timeout, $owarn, $ocrit, $jwarn, $jcrit); + +$timeout = $TIMEOUT; +($opt_t) && ($opt_t =~ /^([0-9]+)$/) && ($timeout = $1); + +$owarn = $DEFAULT_OFFSET_WARN; +($opt_w) && ($opt_w =~ /^([0-9.]+)$/) && ($owarn = $1); + +$ocrit = $DEFAULT_OFFSET_CRIT; +($opt_c) && ($opt_c =~ /^([0-9.]+)$/) && ($ocrit = $1); + +$jwarn = $DEFAULT_JITTER_WARN; +($opt_j) && ($opt_j =~ /^([0-9]+)$/) && ($jwarn = $1); + +$jcrit = $DEFAULT_JITTER_CRIT; +($opt_k) && ($opt_k =~ /^([0-9]+)$/) && ($jcrit = $1); + +if ($ocrit < $owarn ) { + print "Critical offset should be larger than warning offset\n"; + print_usage(); + exit $ERRORS{"UNKNOWN"}; +} + +if ($def_jitter) { + if ($opt_k < $opt_j) { + print "Critical jitter should be larger than warning jitter\n"; + print_usage(); + exit $ERRORS{'UNKNOWN'}; + } +} + + +my $stratum = -1; +my $ignoreret = 0; +my $answer = undef; +my $offset = undef; +my $jitter = undef; +my $syspeer = undef; +my $candidate = 0; +my @candidates; +my $msg; # first line of output to print if format is invalid + +my $state = $ERRORS{'UNKNOWN'}; +my $ntpdate_error = $ERRORS{'UNKNOWN'}; +my $jitter_error = $ERRORS{'UNKNOWN'}; + +# some systems don't have a proper ntpq (migrated from ntpdc) +my $have_ntpq = undef; +if ($utils::PATH_TO_NTPQ && -x $utils::PATH_TO_NTPQ ) { + $have_ntpq = 1; +}else{ + $have_ntpq = 0; +} + +# Just in case of problems, let's not hang Nagios +$SIG{'ALRM'} = sub { + print ("ERROR: No response from ntp server (alarm)\n"); + exit $ERRORS{"UNKNOWN"}; +}; +alarm($timeout); + +# Determine protocol to be used for ntpdate and ntpq +my $ntpdate = $utils::PATH_TO_NTPDATE; +my $ntpq = $utils::PATH_TO_NTPQ; +if ($ipv4) { + $ntpdate .= " -4"; + $ntpq .= " -4"; +} +elsif ($ipv6) { + $ntpdate .= " -6"; + $ntpq .= " -6"; +} +# else don't use any flags + +### +### +### First, check ntpdate +### +### + +if (!open (NTPDATE, $ntpdate . " -q $host 2>&1 |")) { + print "Could not open $ntpdate: $!\n"; + exit $ERRORS{"UNKNOWN"}; +} + +my $out; +while (<NTPDATE>) { + #print if ($verbose); # noop + $msg = $_ unless ($msg); + $out .= "$_ "; + + if (/stratum\s(\d+)/) { + $stratum = $1; + } + + if (/(offset|adjust)\s+([-.\d]+)/i) { + $offset = $2; + + # An offset of 0.000000 with an error is probably bogus. Actually, + # it's probably always bogus, but let's be paranoid here. + # Has been reported that 0.0000 happens in a production environment + # on Solaris 8 so this check should be taken out - SF tracker 1150777 + if (defined $opt_O ) { + if ($offset == 0) { undef $offset;} + } + + $ntpdate_error = defined ($offset) ? $ERRORS{"OK"} : $ERRORS{"CRITICAL"}; + print "ntperr = $ntpdate_error \n" if $verbose; + + } + + if (/no server suitable for synchronization found/) { + if ($stratum == 16) { + $ntpdate_error = $ERRORS{"WARNING"}; + $msg = "Desynchronized peer server found"; + $ignoreret=1; + } + else { + $ntpdate_error = $ERRORS{"CRITICAL"}; + $msg = "No suitable peer server found - "; + } + } + +} +$out =~ s/\n//g; +close (NTPDATE) || + die $! ? "$out - Error closing $ntpdate pipe: $!" + : "$out - Exit status: $? from $ntpdate\n"; + +# declare an error if we also get a non-zero return code from ntpdate +# unless already set to critical +if ( $? && !$ignoreret ) { + print "stderr = $? : $! \n" if $verbose; + $ntpdate_error = $ntpdate_error == $ERRORS{"CRITICAL"} ? $ERRORS{"CRITICAL"} : $ERRORS{"UNKNOWN"} ; + print "ntperr = $ntpdate_error : $!\n" if $verbose; +} + +### +### +### Then scan xntpq/ntpq if it exists +### and look in the 11th column for jitter +### +# Field 1: Tally Code ( Space, 'x','.','-','+','#','*','o') +# Only match for '*' which implies sys.peer +# or 'o' which implies pps.peer +# If both exist, the last one is picked. +# Field 2: address of the remote peer +# Field 3: Refid of the clock (0.0.0.0 if unknown, WWWV/PPS/GPS/ACTS/USNO/PCS/... if Stratum1) +# Field 4: stratum (0-15) +# Field 5: Type of the peer: local (l), unicast (u), multicast (m) +# broadcast (b); not sure about multicast/broadcast +# Field 6: last packet receive (in seconds) +# Field 7: polling interval +# Field 8: reachability resgister (octal) +# Field 9: delay +# Field 10: offset +# Field 11: dispersion/jitter +# +# According to bug 773588 Some solaris xntpd implementations seemto match on +# "#" even though the docs say it exceeds maximum distance. Providing patch +# here which will generate a warining. + +if ($have_ntpq) { + + if ( open(NTPQ, $ntpq . " -np $host 2>&1 |") ) { + while (<NTPQ>) { + print $_ if ($verbose); + if ( /timed out/ ){ + $have_ntpq = 0 ; + last ; + } + # number of candidates on <host> for sys.peer + if (/^(\*|\+|\#|o])/) { + ++$candidate; + push (@candidates, $_); + print "Candidate count= $candidate\n" if ($verbose); + } + + # match sys.peer or pps.peer + if (/^(\*|o)(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)/) { + $syspeer = $2; + $stratum = $4; + $jitter = $11; + print "match $_ \n" if $verbose; + if ($jitter > $jcrit) { + print "Jitter_crit = $11 :$jcrit\n" if ($verbose); + $jitter_error = $ERRORS{'CRITICAL'}; + } elsif ($jitter > $jwarn ) { + print "Jitter_warn = $11 :$jwarn\n" if ($verbose); + $jitter_error = $ERRORS{'WARNING'}; + } else { + $jitter_error = $ERRORS{'OK'}; + } + } else { + print "No match!\n" if $verbose; + $jitter = '(not parsed)'; + } + + } + close NTPQ || + die $! ? "Error closing $ntpq pipe: $!" + : "Exit status: $? from $ntpq\n"; + + # if we did not match sys.peer or pps.peer but matched # candidates only + # generate a warning + # based on bug id 773588 + unless (defined $syspeer) { + if ($#candidates >=0) { + foreach my $c (@candidates) { + $c =~ /^(#)([-0-9.\s]+)\s+([-0-9A-Za-z_().]+)\s+([-0-9.]+)\s+([lumb-]+)\s+([-0-9m.]+)\s+([-0-9.]+)\s+([-0-9.]+)\s+([-0-9.]+)\s+([-0-9.]+)\s+([-0-9.]+)/; + $syspeer = $2; + $stratum = $4; + $jitter = $11; + print "candidate match $c \n" if $verbose; + if ($jitter > $jcrit) { + print "Candidate match - Jitter_crit = $11 :$jcrit\n" if ($verbose); + $jitter_error = $ERRORS{'CRITICAL'}; + }elsif ($jitter > $jwarn ) { + print "Candidate match - Jitter_warn = $11 :$jwarn \n" if ($verbose); + $jitter_error = $ERRORS{'WARNING'}; + } else { + $jitter_error = $ERRORS{'WARNING'}; + } + } + + } + } + } +} + + +if ($ntpdate_error != $ERRORS{'OK'}) { + $state = $ntpdate_error; + if ($ntpdate_error == $ERRORS{'WARNING'} ) { + $answer = $msg; + } + else { + $answer = $msg . "Server for ntp probably down"; + } + + if (defined($offset) && abs($offset) > $ocrit) { + $state = $ERRORS{'CRITICAL'}; + $answer = "Server Error and offset $offset sec > +/- $ocrit sec"; + } elsif (defined($offset) && abs($offset) > $owarn) { + $answer = "Server error and offset $offset sec > +/- $owarn sec"; + } elsif (defined($jitter) && abs($jitter) > $jcrit) { + $answer = "Server error and jitter $jitter msec > +/- $jcrit msec"; + } elsif (defined($jitter) && abs($jitter) > $jwarn) { + $answer = "Server error and jitter $jitter msec > +/- $jwarn msec"; + } + +} elsif ($have_ntpq && $jitter_error != $ERRORS{'OK'}) { + $state = $jitter_error; + $answer = "Jitter $jitter too high"; + if (defined($offset) && abs($offset) > $ocrit) { + $state = $ERRORS{'CRITICAL'}; + $answer = "Jitter error and offset $offset sec > +/- $ocrit sec"; + } elsif (defined($offset) && abs($offset) > $owarn) { + $answer = "Jitter error and offset $offset sec > +/- $owarn sec"; + } elsif (defined($jitter) && abs($jitter) > $jcrit) { + $answer = "Jitter error and jitter $jitter msec > +/- $jcrit msec"; + } elsif (defined($jitter) && abs($jitter) > $jwarn) { + $answer = "Jitter error and jitter $jitter msec > +/- $jwarn msec"; + } + +} elsif( !$have_ntpq ) { # no errors from ntpdate and no ntpq or ntpq timed out + if (abs($offset) > $ocrit) { + $state = $ERRORS{'CRITICAL'}; + $answer = "Offset $offset sec > +/- $ocrit sec"; + } elsif (abs($offset) > $owarn) { + $state = $ERRORS{'WARNING'}; + $answer = "Offset $offset sec > +/- $owarn sec"; + } elsif (( abs($offset) > $owarn) && $def_jitter ) { + $state = $ERRORS{'WARNING'}; + $answer = "Offset $offset sec > +/- $owarn sec, ntpq timed out"; + } elsif ( $def_jitter ) { + $state = $ERRORS{'WARNING'}; + $answer = "Offset $offset secs, ntpq timed out"; + } else{ + $state = $ERRORS{'OK'}; + $answer = "Offset $offset secs"; + } + + + +} else { # no errors from ntpdate or ntpq + if (abs($offset) > $ocrit) { + $state = $ERRORS{'CRITICAL'}; + $answer = "Offset $offset sec > +/- $ocrit sec, jitter $jitter msec"; + } elsif (abs($jitter) > $jcrit ) { + $state = $ERRORS{'CRITICAL'}; + $answer = "Jitter $jitter msec> +/- $jcrit msec, offset $offset sec"; + } elsif (abs($offset) > $owarn) { + $state = $ERRORS{'WARNING'}; + $answer = "Offset $offset sec > +/- $owarn sec, jitter $jitter msec"; + } elsif (abs($jitter) > $jwarn ) { + $state = $ERRORS{'WARNING'}; + $answer = "Jitter $jitter msec> +/- $jwarn msec, offset $offset sec"; + + } else { + $state = $ERRORS{'OK'}; + $answer = "Offset $offset secs, jitter $jitter msec, peer is stratum $stratum"; + } + +} + +foreach my $key (keys %ERRORS) { + if ($state==$ERRORS{$key}) { +# print ("NTP $key: $answer"); + print ("NTP $key: $answer|offset=$offset, jitter=" . $jitter/1000 . ",peer_stratum=$stratum\n"); + last; + } +} +exit $state; + + +#### +#### subs + +sub print_usage () { + print "Usage: $PROGNAME -H <host> [-46] [-O] [-w <warn>] [-c <crit>] [-j <warn>] [-k <crit>] [-v verbose]\n"; +} + +sub print_help () { + print_revision($PROGNAME,'@NP_VERSION@'); + print "Copyright (c) 2003 Bo Kersey/Karl DeBisschop\n"; + print "\n"; + print_usage(); + print " +Checks the local timestamp offset versus <host> with ntpdate +Checks the jitter/dispersion of clock signal between <host> and its sys.peer with ntpq\n +-O (--zero-offset) + A zero offset on \"ntpdate\" will generate a CRITICAL.\n +-w (--warning) + Clock offset in seconds at which a warning message will be generated.\n Defaults to $DEFAULT_OFFSET_WARN. +-c (--critical) + Clock offset in seconds at which a critical message will be generated.\n Defaults to $DEFAULT_OFFSET_CRIT. +-j (--jwarn) + Clock jitter in milliseconds at which a warning message will be generated.\n Defaults to $DEFAULT_JITTER_WARN. +-k (--jcrit) + Clock jitter in milliseconds at which a critical message will be generated.\n Defaults to $DEFAULT_JITTER_CRIT. + + If jitter/dispersion is specified with -j or -k and ntpq times out, then a + warning is returned.\n +-4 (--use-ipv4) + Use IPv4 connection +-6 (--use-ipv6) + Use IPv6 connection +\n"; +support(); +} |