466 lines
14 KiB
Perl
Executable file
466 lines
14 KiB
Perl
Executable file
#!/usr/bin/perl -w
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# (c)1999 Ian Cass, Knowledge Matters Ltd.
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# Read the GNU copyright stuff for all the legalese
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#
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# Check NTP time servers plugin. This plugin requires the ntpdate utility to
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# be installed on the system, however since it's part of the ntp suite, you
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# should already have it installed.
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#
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# $Id: check_ntp.pl,v 1.29 2005/05/25 14:05:41 sghosh Exp $
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#
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# Nothing clever done in this program - its a very simple bare basics hack to
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# get the job done.
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#
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# Things to do...
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# check @words[9] for time differences greater than +/- x secs & return a
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# warning.
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#
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# (c) 1999 Mark Jewiss, Knowledge Matters Limited
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# 22-9-1999, 12:45
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#
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# Modified script to accept 2 parameters or set defaults.
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# Now issues warning or critical alert is time difference is greater than the
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# time passed.
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#
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# These changes have not been tested completely due to the unavailability of a
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# server with the incorrect time.
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#
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# (c) 1999 Bo Kersey, VirCIO - Managed Server Solutions <bo@vircio.com>
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# 22-10-99, 12:17
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#
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# Modified the script to give useage if no parameters are input.
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#
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# Modified the script to check for negative as well as positive
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# time differences.
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#
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# Modified the script to work with ntpdate 3-5.93e Wed Apr 14 20:23:03 EDT 1999
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#
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# Modified the script to work with ntpdate's that return adjust or offset...
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#
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#
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# Script modified 2000 June 01 by William Pietri <william@bianca.com>
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#
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# Modified script to handle weird cases:
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# o NTP server doesn't respond (e.g., has died)
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# o Server has correct time but isn't suitable synchronization
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# source. This happens while starting up and if contact
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# with master has been lost.
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#
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# Modifed to run under Embedded Perl (sghosh@users.sf.net)
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# - combined logic some blocks together..
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#
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# Added ntpdate check for stratum 16 desynch peer (James Fidell) Feb 03, 2003
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#
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# ntpdate - offset is in seconds
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# changed ntpdc to ntpq - jitter/dispersion is in milliseconds
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#
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# Patch for for regex for stratum1 refid.
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require 5.004;
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use POSIX;
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use strict;
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use Getopt::Long;
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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 $ipv6);
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use lib utils.pm;
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use utils qw($TIMEOUT %ERRORS &print_revision &support);
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$PROGNAME="check_ntp";
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sub print_help ();
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sub print_usage ();
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$ENV{'PATH'}='';
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$ENV{'BASH_ENV'}='';
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$ENV{'ENV'}='';
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# defaults in sec
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my $DEFAULT_OFFSET_WARN = 60; # 1 minute
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my $DEFAULT_OFFSET_CRIT = 120; # 2 minutes
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# default in millisec
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my $DEFAULT_JITTER_WARN = 5000; # 5 sec
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my $DEFAULT_JITTER_CRIT = 10000; # 10 sec
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Getopt::Long::Configure('bundling');
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GetOptions
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("V" => \$opt_V, "version" => \$opt_V,
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"h" => \$opt_h, "help" => \$opt_h,
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"v" => \$verbose, "verbose" => \$verbose,
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"4" => \$ipv4, "use-ipv4" => \$ipv4,
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"6" => \$ipv6, "use-ipv6" => \$ipv6,
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"w=f" => \$opt_w, "warning=f" => \$opt_w, # offset|adjust warning if above this number
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"c=f" => \$opt_c, "critical=f" => \$opt_c, # offset|adjust critical if above this number
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"O" => \$opt_O, "zero-offset" => \$opt_O, # zero-offset bad
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"j=s" => \$opt_j, "jwarn=i" => \$opt_j, # jitter warning if above this number
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"k=s" => \$opt_k, "jcrit=i" => \$opt_k, # jitter critical if above this number
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"t=s" => \$opt_t, "timeout=i" => \$opt_t,
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"H=s" => \$opt_H, "hostname=s" => \$opt_H);
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if ($opt_V) {
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print_revision($PROGNAME,'$Revision: 1.29 $ ');
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exit $ERRORS{'OK'};
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}
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if ($opt_h) {
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print_help();
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exit $ERRORS{'OK'};
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}
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# jitter test params specified
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if (defined $opt_j || defined $opt_k ) {
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$def_jitter = 1;
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}
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$opt_H = shift unless ($opt_H);
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my $host = $1 if ($opt_H && $opt_H =~ m/^([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+|[a-zA-Z][-a-zA-Z0-9]+(\.[a-zA-Z][-a-zA-Z0-9]+)*)$/);
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unless ($host) {
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print "No target host specified\n";
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print_usage();
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exit $ERRORS{'UNKNOWN'};
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}
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my ($timeout, $owarn, $ocrit, $jwarn, $jcrit);
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$timeout = $TIMEOUT;
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($opt_t) && ($opt_t =~ /^([0-9]+)$/) && ($timeout = $1);
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$owarn = $DEFAULT_OFFSET_WARN;
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($opt_w) && ($opt_w =~ /^([0-9.]+)$/) && ($owarn = $1);
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$ocrit = $DEFAULT_OFFSET_CRIT;
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($opt_c) && ($opt_c =~ /^([0-9.]+)$/) && ($ocrit = $1);
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$jwarn = $DEFAULT_JITTER_WARN;
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($opt_j) && ($opt_j =~ /^([0-9]+)$/) && ($jwarn = $1);
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$jcrit = $DEFAULT_JITTER_CRIT;
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($opt_k) && ($opt_k =~ /^([0-9]+)$/) && ($jcrit = $1);
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if ($ocrit < $owarn ) {
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print "Critical offset should be larger than warning offset\n";
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print_usage();
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exit $ERRORS{"UNKNOWN"};
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}
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if ($def_jitter) {
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if ($opt_k < $opt_j) {
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print "Critical jitter should be larger than warning jitter\n";
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print_usage();
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exit $ERRORS{'UNKNOWN'};
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}
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}
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my $stratum = -1;
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my $ignoreret = 0;
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my $answer = undef;
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my $offset = undef;
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my $jitter = undef;
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my $syspeer = undef;
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my $candidate = 0;
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my @candidates;
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my $msg; # first line of output to print if format is invalid
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my $state = $ERRORS{'UNKNOWN'};
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my $ntpdate_error = $ERRORS{'UNKNOWN'};
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my $jitter_error = $ERRORS{'UNKNOWN'};
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# some systems don't have a proper ntpq (migrated from ntpdc)
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my $have_ntpq = undef;
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if ($utils::PATH_TO_NTPQ && -x $utils::PATH_TO_NTPQ ) {
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$have_ntpq = 1;
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}else{
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$have_ntpq = 0;
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}
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# Just in case of problems, let's not hang Nagios
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$SIG{'ALRM'} = sub {
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print ("ERROR: No response from ntp server (alarm)\n");
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exit $ERRORS{"UNKNOWN"};
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};
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alarm($timeout);
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# Determine protocol to be used for ntpdate and ntpq
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my $ntpdate = $utils::PATH_TO_NTPDATE;
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my $ntpq = $utils::PATH_TO_NTPQ;
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if ($ipv4) {
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$ntpdate .= " -4";
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$ntpq .= " -4";
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}
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elsif ($ipv6) {
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$ntpdate .= " -6";
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$ntpq .= " -6";
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}
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# else don't use any flags
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###
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###
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### First, check ntpdate
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###
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###
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if (!open (NTPDATE, $ntpdate . " -q $host 2>&1 |")) {
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print "Could not open ntpdate\n";
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exit $ERRORS{"UNKNOWN"};
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}
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while (<NTPDATE>) {
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#print if ($verbose); # noop
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$msg = $_ unless ($msg);
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if (/stratum\s(\d+)/) {
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$stratum = $1;
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}
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if (/(offset|adjust)\s+([-.\d]+)/i) {
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$offset = $2;
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# An offset of 0.000000 with an error is probably bogus. Actually,
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# it's probably always bogus, but let's be paranoid here.
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# Has been reported that 0.0000 happens in a production environment
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# on Solaris 8 so this check should be taken out - SF tracker 1150777
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if (defined $opt_O ) {
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if ($offset == 0) { undef $offset;}
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}
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$ntpdate_error = defined ($offset) ? $ERRORS{"OK"} : $ERRORS{"CRITICAL"};
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print "ntperr = $ntpdate_error \n" if $verbose;
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}
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if (/no server suitable for synchronization found/) {
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if ($stratum == 16) {
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$ntpdate_error = $ERRORS{"WARNING"};
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$msg = "Desynchronized peer server found";
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$ignoreret=1;
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}
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else {
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$ntpdate_error = $ERRORS{"CRITICAL"};
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$msg = "No suitable peer server found - ";
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}
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}
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}
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close (NTPDATE);
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# declare an error if we also get a non-zero return code from ntpdate
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# unless already set to critical
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if ( $? && !$ignoreret ) {
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print "stderr = $? : $! \n" if $verbose;
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$ntpdate_error = $ntpdate_error == $ERRORS{"CRITICAL"} ? $ERRORS{"CRITICAL"} : $ERRORS{"UNKNOWN"} ;
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print "ntperr = $ntpdate_error : $!\n" if $verbose;
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}
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###
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###
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### Then scan xntpq/ntpq if it exists
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### and look in the 11th column for jitter
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###
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# Field 1: Tally Code ( Space, 'x','.','-','+','#','*','o')
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# Only match for '*' which implies sys.peer
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# or 'o' which implies pps.peer
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# If both exist, the last one is picked.
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# Field 2: address of the remote peer
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# Field 3: Refid of the clock (0.0.0.0 if unknown, WWWV/PPS/GPS/ACTS/USNO/PCS/... if Stratum1)
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# Field 4: stratum (0-15)
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# Field 5: Type of the peer: local (l), unicast (u), multicast (m)
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# broadcast (b); not sure about multicast/broadcast
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# Field 6: last packet receive (in seconds)
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# Field 7: polling interval
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# Field 8: reachability resgister (octal)
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# Field 9: delay
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# Field 10: offset
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# Field 11: dispersion/jitter
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#
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# According to bug 773588 Some solaris xntpd implementations seemto match on
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# "#" even though the docs say it exceeds maximum distance. Providing patch
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# here which will generate a warining.
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if ($have_ntpq) {
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if ( open(NTPQ, $ntpq . " -np $host 2>&1 |") ) {
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while (<NTPQ>) {
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print $_ if ($verbose);
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if ( /timed out/ ){
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$have_ntpq = 0 ;
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last ;
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}
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# number of candidates on <host> for sys.peer
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if (/^(\*|\+|\#|o])/) {
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++$candidate;
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push (@candidates, $_);
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print "Candidate count= $candidate\n" if ($verbose);
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}
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# match sys.peer or pps.peer
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if (/^(\*|o)([-0-9.\s]+)\s+([-0-9A-Za-z_().]+)\s+([-0-9.]+)\s+([lumb-]+)\s+([-0-9hm.]+)\s+([-0-9.mh]+)\s+([-0-9.]+)\s+([-0-9.]+)\s+([-0-9.]+)\s+([-0-9.]+)/) {
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$syspeer = $2;
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$stratum = $4;
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$jitter = $11;
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print "match $_ \n" if $verbose;
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if ($jitter > $jcrit) {
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print "Jitter_crit = $11 :$jcrit\n" if ($verbose);
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$jitter_error = $ERRORS{'CRITICAL'};
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} elsif ($jitter > $jwarn ) {
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print "Jitter_warn = $11 :$jwarn\n" if ($verbose);
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$jitter_error = $ERRORS{'WARNING'};
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} else {
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$jitter_error = $ERRORS{'OK'};
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}
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} else {
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print "No match!\n" if $verbose;
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$jitter = '(not parsed)';
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}
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}
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close NTPQ;
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# if we did not match sys.peer or pps.peer but matched # candidates only
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# generate a warning
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# based on bug id 773588
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unless (defined $syspeer) {
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if ($#candidates >=0) {
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foreach my $c (@candidates) {
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$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.]+)/;
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$syspeer = $2;
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$stratum = $4;
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$jitter = $11;
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print "candidate match $c \n" if $verbose;
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if ($jitter > $jcrit) {
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print "Candidate match - Jitter_crit = $11 :$jcrit\n" if ($verbose);
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$jitter_error = $ERRORS{'CRITICAL'};
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}elsif ($jitter > $jwarn ) {
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print "Candidate match - Jitter_warn = $11 :$jwarn \n" if ($verbose);
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$jitter_error = $ERRORS{'WARNING'};
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} else {
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$jitter_error = $ERRORS{'WARNING'};
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}
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}
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}
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}
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}
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}
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if ($ntpdate_error != $ERRORS{'OK'}) {
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$state = $ntpdate_error;
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if ($ntpdate_error == $ERRORS{'WARNING'} ) {
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$answer = $msg;
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}
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else {
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$answer = $msg . "Server for ntp probably down";
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}
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if (defined($offset) && abs($offset) > $ocrit) {
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$state = $ERRORS{'CRITICAL'};
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$answer = "Server Error and offset $offset sec > +/- $ocrit sec";
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} elsif (defined($offset) && abs($offset) > $owarn) {
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$answer = "Server error and offset $offset sec > +/- $owarn sec";
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} elsif (defined($jitter) && abs($jitter) > $jcrit) {
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$answer = "Server error and jitter $jitter msec > +/- $jcrit msec";
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} elsif (defined($jitter) && abs($jitter) > $jwarn) {
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$answer = "Server error and jitter $jitter msec > +/- $jwarn msec";
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}
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} elsif ($have_ntpq && $jitter_error != $ERRORS{'OK'}) {
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$state = $jitter_error;
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$answer = "Jitter $jitter too high";
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if (defined($offset) && abs($offset) > $ocrit) {
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$state = $ERRORS{'CRITICAL'};
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$answer = "Jitter error and offset $offset sec > +/- $ocrit sec";
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} elsif (defined($offset) && abs($offset) > $owarn) {
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$answer = "Jitter error and offset $offset sec > +/- $owarn sec";
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} elsif (defined($jitter) && abs($jitter) > $jcrit) {
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$answer = "Jitter error and jitter $jitter msec > +/- $jcrit msec";
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} elsif (defined($jitter) && abs($jitter) > $jwarn) {
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$answer = "Jitter error and jitter $jitter msec > +/- $jwarn msec";
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}
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} elsif( !$have_ntpq ) { # no errors from ntpdate and no ntpq or ntpq timed out
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if (abs($offset) > $ocrit) {
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$state = $ERRORS{'CRITICAL'};
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$answer = "Offset $offset sec > +/- $ocrit sec";
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} elsif (abs($offset) > $owarn) {
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$state = $ERRORS{'WARNING'};
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$answer = "Offset $offset sec > +/- $owarn sec";
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} elsif (( abs($offset) > $owarn) && $def_jitter ) {
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$state = $ERRORS{'WARNING'};
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$answer = "Offset $offset sec > +/- $owarn sec, ntpq timed out";
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} elsif ( $def_jitter ) {
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$state = $ERRORS{'WARNING'};
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$answer = "Offset $offset secs, ntpq timed out";
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} else{
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$state = $ERRORS{'OK'};
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$answer = "Offset $offset secs";
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}
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} else { # no errors from ntpdate or ntpq
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if (abs($offset) > $ocrit) {
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$state = $ERRORS{'CRITICAL'};
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$answer = "Offset $offset sec > +/- $ocrit sec, jitter $jitter msec";
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} elsif (abs($jitter) > $jcrit ) {
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$state = $ERRORS{'CRITICAL'};
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$answer = "Jitter $jitter msec> +/- $jcrit msec, offset $offset sec";
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} elsif (abs($offset) > $owarn) {
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$state = $ERRORS{'WARNING'};
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$answer = "Offset $offset sec > +/- $owarn sec, jitter $jitter msec";
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} elsif (abs($jitter) > $jwarn ) {
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$state = $ERRORS{'WARNING'};
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$answer = "Jitter $jitter msec> +/- $jwarn msec, offset $offset sec";
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} else {
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$state = $ERRORS{'OK'};
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$answer = "Offset $offset secs, jitter $jitter msec, peer is stratum $stratum";
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}
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}
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foreach my $key (keys %ERRORS) {
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if ($state==$ERRORS{$key}) {
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# print ("NTP $key: $answer");
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print ("NTP $key: $answer|offset=$offset, jitter=" . $jitter/1000 . ",peer_stratum=$stratum\n");
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last;
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}
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}
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exit $state;
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####
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#### subs
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sub print_usage () {
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print "Usage: $PROGNAME -H <host> [-46] [-O] [-w <warn>] [-c <crit>] [-j <warn>] [-k <crit>] [-v verbose]\n";
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}
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sub print_help () {
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print_revision($PROGNAME,'$Revision: 1.29 $');
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print "Copyright (c) 2003 Bo Kersey/Karl DeBisschop\n";
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print "\n";
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print_usage();
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print "
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Checks the local timestamp offset versus <host> with ntpdate
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Checks the jitter/dispersion of clock signal between <host> and its sys.peer with ntpq\n
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-O (--zero-offset)
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A zero offset on \"ntpdate\" will generate a CRITICAL.\n
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-w (--warning)
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Clock offset in seconds at which a warning message will be generated.\n Defaults to $DEFAULT_OFFSET_WARN.
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-c (--critical)
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Clock offset in seconds at which a critical message will be generated.\n Defaults to $DEFAULT_OFFSET_CRIT.
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-j (--jwarn)
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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();
|
|
}
|